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2 – Discussion on the application potential of ethylimidazole in new lithium battery electrolytes

2月 19th, 2025 News

2-Ethylimidazole: a new star in lithium battery electrolytes

In today’s era of rapid technological development, the advancement of battery technology is undoubtedly an important driving force for the fields of electronic devices, electric vehicles and even renewable energy storage. Among them, lithium batteries have become mainstream energy storage solutions due to their advantages such as high energy density, long cycle life and low self-discharge rate. However, with the continuous expansion of application scenarios, the performance bottlenecks of traditional lithium batteries have gradually emerged, especially under extreme conditions such as high temperature, low temperature, and high power output, the performance of traditional electrolytes is not satisfactory. Therefore, finding new electrolyte materials has become the focus of scientific researchers.

2-Ethylimidazole (2-Ethylimidazole, referred to as EIM) has made its mark in the field of lithium battery electrolytes in recent years. EIM not only has good chemical stability and electrochemical window, but also can significantly improve the conductivity, interface compatibility and safety of the electrolyte. This article will deeply explore the application potential of 2-ethylimidazole in new lithium battery electrolytes, analyze its advantages and challenges, and look forward to future research directions.

2-Basic Properties of Ethylimidazole

2-Ethylimidazole (EIM) is an organic compound containing an imidazole ring structure, with a molecular formula of C6H10N2. Its molecular weight is 110.15 g/mol, its melting point is 149-151°C and its boiling point is 285°C. EIM has high thermal and chemical stability and can maintain good physical and chemical properties over a wide temperature range. These characteristics make EIM perform well in a variety of application scenarios, especially in the field of lithium battery electrolytes.

1. Molecular structure and chemical properties

The molecular structure of EIM consists of an imidazole ring and an ethyl side chain. The imidazole ring is a five-membered heterocycle containing two nitrogen atoms, conferring excellent coordination capability and electron donor characteristics to EIM. The ethyl side chain increases the hydrophobicity of the molecules, which helps to improve the solubility of EIM in organic solvents. In addition, EIM is also of a certain basic nature and can react with acidic substances to form stable salt compounds. This characteristic allows EIM to act as a buffer in the electrolyte system, adjust the pH value, and prevent the electrolyte from decomposing.

2. Physical properties

In addition to chemical stability, EIM also exhibits excellent physical properties. It is a white crystalline solid at room temperature, has a high melting point and boiling point, and can remain solid or liquid in a wide temperature range. The density of EIM is 1.07 g/cm³ and the dielectric constant is 3.7, which make it very compatible in the electrolyte formulation. In addition, the glass transition temperature (Tg) of EIM is low, about -60°C, which means it can maintain good fluidity in low temperature environments, which is for improving lithium batteries at low temperatures.Performance under temperature conditions is crucial.

3. Electrochemical properties

EIM’s electrochemical window is wide, usually between 3.0-5.0 V, which makes it suitable for high voltage lithium battery systems. Research shows that EIM can form a stable solid electrolyte interface (SEI) film on the surface of lithium metal negative electrode, effectively inhibiting the growth of lithium dendrites, thereby improving the safety and cycle life of the battery. In addition, EIM also has a high ion migration number, which can promote the rapid transmission of lithium ions, reduce the polarization phenomenon inside the battery, and thus improve the overall performance of the battery.

Current status of application of 2-ethylimidazole in lithium battery electrolytes

In recent years, with the increasing demand for high-performance lithium batteries, researchers have begun to explore various new electrolyte materials in order to break through the limitations of traditional electrolytes. 2-ethylimidazole (EIM), as a potential electrolyte additive, has shown impressive application prospects in several research projects. The following are the main application status and development trends of EIM in lithium battery electrolytes.

1. As an electrolyte additive

EIM was mainly used as an additive when it was introduced into the lithium battery electrolyte system. Studies have shown that adding EIM in moderation can significantly improve the conductivity and stability of the electrolyte. For example, after adding 1%-5% EIM to the carbonate electrolyte, the ionic conductivity of the electrolyte is increased by about 20%-30%, and the oxidative stability of the electrolyte is also significantly enhanced. This is because EIM can form hydrogen bonds or coordination bonds with anions in the lithium salt, changing the microstructure of the electrolyte, thereby promoting the dissociation and migration of lithium ions.

In addition, EIM can improve interfacial compatibility between the electrolyte and the electrode material. Experimental results show that in the electrolyte containing EIM, the surface morphology of the positive electrode material is more uniform, the utilization rate of active substances is higher, and the charging and discharging efficiency of the battery is also improved. Especially for high-nickel ternary cathode materials (such as NCM811), the addition of EIM can effectively suppress the occurrence of side reactions and extend the cycle life of the battery.

2. As a functional solvent

In addition to being an additive, EIM can also be used directly as a functional solvent, replacing traditional carbonate solvents. Compared with traditional solvents, EIM has lower viscosity and higher flash point, and can maintain good fluidity over a wider temperature range, especially suitable for lithium batteries in high temperature environments. Studies have shown that EIM-based electrolytes can maintain high ionic conductivity and stability under high temperature conditions above 60°C, while traditional carbonate electrolytes often suffer performance degradation due to decomposition at this temperature.

In addition, EIM has better wetting properties, which can better wet the electrode material and reduce the contact resistance between the electrode and the electrolyte. This is particularly important for improving the battery’s rate performance and low temperature performance. The experimental results show that EIM is usedThe lithium battery as a solvent can still maintain a capacity retention rate of more than 80% in a low temperature environment of -20°C, while the capacity retention rate of traditional electrolyte batteries is only about 50%.

3. As a solid electrolyte component

With the rapid development of solid-state lithium battery technology, the application of EIM in solid-state electrolytes has also attracted widespread attention. As an organic small molecule, EIM has high flexibility and good film formation. It can form composite materials with inorganic solid electrolytes (such as LiPON, LLZO, etc.), improving the mechanical strength and ionic conductivity of the solid electrolyte. Research shows that by mixing EIM with inorganic solid electrolytes, a composite solid electrolyte with high ionic conductivity and good mechanical properties can be prepared, which is suitable for all-solid lithium batteries.

In addition, EIM can also be combined with polymer electrolytes (such as PEO, PVDF, etc.) to form a quasi-solid electrolyte. This type of electrolyte not only has high ionic conductivity, but also has good flexibility and processability, and can maintain stable electrochemical properties under large deformation. Experimental results show that EIM-based quasi-solid electrolytes can still maintain good conductivity and interface stability under extreme conditions such as bending and folding, and are suitable for lithium batteries in flexible electronic devices and wearable devices.

2-Advantages of ethylimidazole in lithium battery electrolytes

2-ethylimidazole (EIM) has attracted widespread attention in the field of lithium battery electrolytes mainly because it shows significant advantages in many aspects. The advantages of EIM will be discussed in detail from three aspects: electrochemical performance, safety and cost-effectiveness.

1. Excellent electrochemical performance

The application of EIM in lithium battery electrolytes has greatly improved the electrochemical performance of batteries, which is specifically reflected in the following aspects:

  • Wide electrochemical window: The electrochemical window of EIM is wide, usually between 3.0-5.0 V, and can be suitable for high-voltage lithium battery systems. This makes EIM an ideal electrolyte additive for high voltage positive electrode materials (such as NCM811, NCA, etc.), helping to increase the energy density of the battery.

  • High ionic conductivity: EIM can form hydrogen bonds or coordination bonds with anions in lithium salts, change the microstructure of the electrolyte, and promote the dissociation and migration of lithium ions. Research shows that the ionic conductivity of electrolytes containing EIM is 20%-30% higher than that of traditional electrolytes, thereby reducing the polarization phenomenon inside the battery and improving the overall performance of the battery.

  • Good interface compatibility: EIM can form a stable solid electrolyte interface (SEI) film on the electrode surface, effectively inhibiting the occurrence of side reactions, especially lithium dendrites.Grow. This not only improves the safety of the battery, but also extends the cycle life of the battery. Experimental results show that electrolytes containing EIM can keep the battery at a high capacity retention rate after thousands of cycles.

  • Excellent low-temperature performance: EIM has a low glass transition temperature (Tg) and can maintain good fluidity in low-temperature environments. This is crucial to improving the performance of lithium batteries under low temperature conditions. Studies have shown that lithium batteries using EIM as solvent can still maintain a capacity retention rate of more than 80% in a low temperature environment of -20°C, while the capacity retention rate of traditional electrolyte batteries is only about 50%.

2. Significantly improved safety

The safety of lithium batteries has always been the focus of industry attention, especially in electric vehicles and energy storage systems. The safety of batteries directly affects the reliability and service life of the entire system. The application of EIM in lithium battery electrolytes has significantly improved the safety of the battery, which is specifically manifested as:

  • Inhibit the growth of lithium dendrites: EIM can form a stable SEI film on the surface of the lithium metal negative electrode, effectively inhibiting the growth of lithium dendrites. Lithium dendrites are one of the main causes of battery short circuit and thermal runaway, so the addition of EIM can significantly reduce the risk of safety accidents in batteries.

  • Improving Thermal Stability: EIM has high thermal stability and chemical stability, and can maintain good physical and chemical properties over a wide temperature range. This allows the electrolyte containing EIM to maintain stable electrochemical properties under high temperature environments, avoiding the safety hazards caused by the decomposition of traditional electrolytes at high temperatures.

  • Reduce volatility and flammability: Compared with traditional carbonate solvents, EIM has lower volatility and higher flash point, and is less prone to combustion and explosion. This makes the application of EIM in electrolytes greatly reduces the safety risks of batteries under high temperature or overcharge conditions.

3. Significant cost-effective

In addition to its advantages in electrochemical performance and safety, EIM also performs excellent in cost-effectiveness. Specifically reflected in the following aspects:

  • Easy to obtain raw materials: The synthesis process of EIM is relatively simple, with a wide range of raw materials and a low price. Compared with some complex organic electrolyte additives, EIM has obvious cost advantages and is suitable for large-scale industrial production.

  • Small amount and good effect: EIM as an efficient electric power supplyDetection additives can significantly improve the performance of the electrolyte by adding a small amount. This not only reduces material costs, but also reduces the complexity of the production process and improves production efficiency.

  • Extend battery life: EIM can effectively suppress the occurrence of side reactions and extend the battery’s cycle life. This means that maintenance and replacement costs will be greatly reduced throughout the battery life, thereby improving the economics of the battery.

2-Challenges and Coping Strategies of Ethylimidazole in Lithium Battery Electrolyte

Although 2-ethylimidazole (EIM) shows many advantages in lithium battery electrolytes, it still faces some challenges in practical application. In order to fully realize the potential of EIM, researchers need to propose effective response strategies to these issues. Here are several major challenges and solutions faced by EIM in lithium battery electrolytes.

1. Solubility issues

EIM has good chemical stability and electrochemical properties, but its solubility in some organic solvents is low, especially when crystallization is easily precipitated at high concentrations. This not only affects the uniformity and stability of the electrolyte, but may also lead to local current unevenness in the battery, which in turn affects the performance of the battery.

Coping strategies:

  • Optimize solvent system: By selecting the appropriate co-solvent, the solubility of EIM can be effectively improved. Studies have shown that adding a small amount of high-polar solvents (such as DMC, EC) or low-polar solvents (such as FEC, VC) can significantly improve the solubility of EIM in the electrolyte. In addition, it is also possible to consider using an ionic liquid as a co-solvent to further improve the solubility of EIM and the stability of the electrolyte.
  • Adjust the concentration of EIM: Reasonably control the amount of EIM added according to different application scenarios. Generally speaking, the amount of EIM should not be too high, and it is usually more suitable between 1% and 5%. Excessive concentrations not only increase the risk of precipitation of EIM, but may also affect other performance indicators of the electrolyte, such as viscosity and ionic conductivity.

2. Interface compatibility issues

Although EIM can form a stable SEI film on the electrode surface, in some cases, there are still certain problems with the interface compatibility between the EIM and the electrode material. For example, EIM may react sideways with certain high-nickel ternary positive electrode materials, resulting in poor passivation layers on the electrode surface, affecting the battery charge and discharge efficiency and cycle life.

Coping strategies:

  • Develop new electrode materials: By improving the surface structure of the electrode material or introducing a functional coating, the interface compatibility between the EIM and the electrode material can be effectively improved. For example, using nanoscale positive electrode materials or coating a thin layer of conductive polymer (such as PEDOT-PSS) on its surface can reduce the side reaction between EIM and the electrode material and improve the overall performance of the battery.
  • Optimize electrolyte formula: Interface compatibility between EIM and electrode material can be improved by adjusting other components in the electrolyte. For example, adding an appropriate amount of fluorocarbonate additives (such as FEC, FEMC) can enhance the interaction between EIM and the electrode material, promote the formation of SEI films, and reduce the occurrence of side reactions.

3. Long-term stability issues

EIM has high thermal and chemical stability, but during long-term use, there may still be certain decomposition or aging phenomena, especially under high temperature or high voltage conditions. This will not only affect the performance of the battery, but may also lead to safety issues.

Coping strategies:

  • Introduce antioxidants: By adding an appropriate amount of antioxidants (such as BHT, THF) to the electrolyte, it can effectively inhibit the decomposition and aging of EIM and extend the service life of the battery. Studies have shown that adding 0.1%-0.5% antioxidants can significantly improve the stability of electrolytes containing EIM under high temperature conditions and reduce the capacity attenuation of the battery.
  • Optimize battery packaging technology: By improving the battery packaging technology, it can effectively prevent the impact of the external environment on EIM and extend the battery’s service life. For example, using aluminum-plastic film or ceramic separator with better sealing can reduce the invasion of oxygen and moisture, prevent EIM from reacting with oxygen in the air, thereby improving the long-term stability of the battery.

4. Cost and large-scale production issues

Although EIM’s raw materials are easy to obtain and the synthesis process is relatively simple, in large-scale industrial production, they still face problems of cost and output. Especially for some high-end applications (such as electric vehicles and energy storage systems), the production cost and supply capacity of EIM will become the key factors that restrict its widespread use.

Coping strategies:

  • Optimize synthesis process: By improving the synthesis process of EIM, production costs can be reduced and output can be increased. For example, using a continuous flow reactor instead of a traditional batch reactor can achieve efficient synthesis and large-scale production of EIM. In addition, it can also be optimized by optimizing reaction conditions (such as temperature, pressure, urging, etc.) and further improve the yield and purity of EIM.
  • Build supply chain cooperation: Establish close cooperative relationships with upstream suppliers to ensure stable supply of EIM. At the same time, the production cost of EIM can be reduced through joint research and development and technology transfer, and promoted its widespread application in lithium battery electrolytes.

Future development direction and prospect

2-ethylimidazole (EIM) has broad application prospects in lithium battery electrolytes, but there are still many directions worthy of in-depth research. In the future, scientific researchers can further explore the application potential of EIM from the following aspects and promote the development of lithium battery technology.

1. Development of new electrolyte systems

With the continuous expansion of lithium battery application scenarios, traditional electrolytes have been unable to meet the growing performance needs. Therefore, the development of new electrolyte systems has become a hot topic in current research. As a multifunctional organic compound, EIM can play an important role in different types of electrolyte systems. Future research can focus on the following directions:

  • High voltage electrolyte: With the widespread application of high-voltage positive electrode materials (such as NCM811, NCA, etc.), it is particularly urgent to develop electrolytes suitable for high-voltage lithium batteries. EIM has a broad electrochemical window, which can effectively inhibit the oxidation and decomposition of positive electrode materials, and is expected to become an ideal additive for high-voltage electrolytes.

  • Low-temperature electrolytes: In cold areas or low-temperature environments, the performance of lithium batteries is often limited. EIM has a low glass transition temperature (Tg) that maintains good fluidity under low temperature conditions, helping to develop high-performance electrolytes suitable for low temperature environments. Future research can further optimize the synergistic effect of EIM and other low-temperature additives and improve the low-temperature performance of electrolytes.

  • Solid-state electrolyte: Solid-state lithium batteries are considered to be an important development direction for the next generation of lithium batteries, with higher safety and energy density. As an organic small molecule, EIM has good flexibility and film formation, and can form composite materials with inorganic solid electrolytes or polymer electrolytes, thereby enhancing the mechanical strength and ionic conductivity of the solid electrolytes. Future research can explore more application possibilities of EIM in solid-state electrolytes and promote the commercialization of all-solid-state lithium batteries.

2. Interface engineering and material modification

Interface problems are one of the key factors affecting the performance of lithium batteries. EIM can form a stable SEI film on the electrode surface, effectively suppressing the occurrence of side reactions, but its interface compatibility with the electrode material still needs to be improved.One-step optimization. Future research can focus on the following directions:

  • Interface Modification: By introducing a functionalized coating or modification layer on the electrode surface, the interface compatibility between the EIM and the electrode material can be further improved. For example, using nanoscale positive electrode materials or coating a thin layer of conductive polymer (such as PEDOT-PSS) on its surface can reduce the side reaction between EIM and the electrode material and improve the overall performance of the battery.

  • Material Modification: By modifying the electrode material, the interaction with EIM can be enhanced and the formation of SEI film can be promoted. For example, using doping and coating can improve the surface activity and stability of the electrode material, reduce the decomposition of EIM on the electrode surface, and extend the cycle life of the battery.

3. Design of multifunctional electrolyte additives

In order to further improve the comprehensive performance of lithium batteries, future electrolyte additives must not only have a single function, but also have multiple synergistic effects. As a versatile organic compound, EIM has demonstrated excellent conductivity, interface compatibility and safety in electrolytes. Future research can further explore the synergy between EIM and other additives to design composite electrolyte additives with multiple functions. For example, combining EIM with fluorocarbonate additives (such as FEC, FEMC) can simultaneously improve the conductivity and interface stability of the electrolyte; combining EIM with antioxidants (such as BHT, THF) can simultaneously improve the thermal stability of the electrolyte; combining EIM with antioxidants (such as BHT, THF) can simultaneously improve the thermal stability of the electrolyte. and long-term stability.

4. Promotion of industrial production

Although EIM has shown many advantages in the laboratory, it still faces some challenges in large-scale industrial production. Future research needs to focus on the following aspects:

  • Optimize synthesis process: By improving the synthesis process of EIM, production costs can be reduced and output can be increased. For example, using a continuous flow reactor instead of a traditional batch reactor can achieve efficient synthesis and large-scale production of EIM. In addition, the yield and purity of EIM can be further improved by optimizing reaction conditions (such as temperature, pressure, catalyst, etc.).

  • Build supply chain cooperation: Establish close cooperative relationships with upstream suppliers to ensure stable supply of EIM. At the same time, the production cost of EIM can be reduced through joint research and development and technology transfer, and promoted its widespread application in lithium battery electrolytes.

Conclusion

2-ethylimidazole (EIM) as a novel electrolyteMaterials have shown huge application potential in the field of lithium batteries. It can not only significantly improve the electrochemical performance, safety and cost-effectiveness of batteries, but also have broad application prospects in emerging fields such as high voltage, low temperature and solid-state lithium batteries. However, EIM still faces some challenges in practical applications, such as solubility, interface compatibility and long-term stability. In the future, scientific researchers need to further optimize the performance of EIM through multidisciplinary cross-disciplinary research, solve the bottleneck problems in their applications, and promote the continuous innovation and development of lithium battery technology.

In short, the emergence of EIM has brought new opportunities and challenges to the field of lithium battery electrolytes. We have reason to believe that with the deepening of research, EIM will surely play a more important role in future lithium battery technology, helping global energy transformation and sustainable development.

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Research Dynamics of Preparation of High-Efficiency Sound Insulation Materials with 2-Propylimidazole

2月 19th, 2025 News

Introduction

With the rapid development of modern technology, people have higher and higher requirements for living environment, especially in terms of noise and heat control. Whether in the construction, automobile or home appliance industries, the demand for sound insulation materials is growing. Although traditional sound insulation materials such as glass fibers and rock wool can meet the needs to a certain extent, they have problems such as large weight, fragility, and poor environmental protection, which limits their application scope. Therefore, developing new high-efficiency sound insulation and thermal insulation materials has become a common goal of the scientific and industrial circles.

2-propyliimidazole (2-PIM) has attracted widespread attention in recent years as an organic compound with a unique chemical structure. It not only has good thermal stability and chemical stability, but also exhibits excellent sound absorption and heat insulation properties. Through reasonable chemical modification and composite material design, 2-propylimidazole can be prepared into a variety of high-performance sound insulation and thermal insulation materials, which are widely used in construction, transportation, electronics and other fields. This article will introduce in detail the research progress of 2-propylimidazole in the field of sound insulation and thermal insulation materials, explore its preparation methods, performance characteristics and future development directions, aiming to provide reference for researchers and engineers in related fields.

2-Basic Properties of Propylimidazole

2-propyliimidazole (2-PIM), with the chemical formula C7H10N2, is an organic compound containing imidazole ring and propyl side chain. The imidazole ring imidizes the unique chemical stability and thermal stability of 2-propylimidazole, while the propyl side chain increases its flexibility and processability. Here are some of the basic physical and chemical properties of 2-propylimidazole:

Physical Properties

Properties parameter value
Molecular Weight 126.17 g/mol
Melting point 118-120°C
Boiling point 245-247°C
Density 1.05 g/cm³
Refractive index 1.52
Solution Easy soluble in water,

Chemical Properties

2-propylimidazole has high chemical stability and can maintain structural integrity over a wide temperature range. The nitrogen atom on the imidazole ring carries a partial positive charge, which makes 2-propylimidazole have a certain acid-base amphotericity, which can react with the base under acidic conditions or in the base.react with acid under sexual conditions. In addition, the nitrogen atoms on the imidazole ring can also serve as coordination sites to form stable complexes with other metal ions or polar molecules. These characteristics make 2-propylimidazole have wide application prospects in polymer synthesis, catalyst preparation and other fields.

Structural Characteristics

In the molecular structure of 2-propyliimidazole, the imidazole ring is a five-membered heterocycle composed of two nitrogen atoms and three carbon atoms. The imidazole ring has strong planarity and the ?-electron cloud distribution is relatively uniform, which gives it a good conjugation effect. The presence of propyl side chains makes the molecules have a certain steric hindrance, increases the interaction force between molecules, and helps to improve the mechanical strength and heat resistance of the material. In addition, the propyl side chain can also bind to adjacent molecules through hydrogen bonds or other weak interactions, further enhancing the stability of the material.

Advantages of 2-Propylimidazole in sound insulation and thermal insulation materials

2-propylimidazole, as a new organic compound, has shown many advantages in the field of sound insulation and thermal insulation materials. First, its molecular structure imparts excellent thermal and chemical stability, and can be used for a long time in high temperature environments without decomposition or aging. Second, 2-propylimidazole has a lower density and a high specific surface area, which makes it excellent in the preparation of lightweight, high porosity sound insulation materials. In addition, 2-propylimidazole also has good flexibility and processability. Various forms of composite materials can be prepared through different synthesis methods and process conditions to meet the needs of different application scenarios.

Thermal Stability

The thermal stability of 2-propylimidazole is one of its major advantages in sound insulation and thermal insulation materials. Studies have shown that the decomposition temperature of 2-propylimidazole is as high as 245-247°C, which is much higher than that of many traditional organic materials. This means it can keep the structure intact under high temperature environments without softening or melting due to rising temperatures. This is particularly important for sound insulation materials that need to be used in high temperature environments, such as aerospace, automotive engine compartment, etc. In addition, the thermal stability of 2-propylimidazole also makes it excellent in fire resistance, which can effectively prevent heat transfer when a fire occurs and reduce the risk of fire spread.

Low density and high porosity

The low density and high porosity of 2-propylimidazole are another major advantage of its sound insulation and thermal insulation materials. Due to the large amount of voids and micropores in its molecular structure, 2-propyliimidazolyl materials have a lower density, usually between 0.1-0.5 g/cm³. This low density characteristic allows materials to significantly reduce weight while maintaining good sound and thermal insulation properties, and reduce transportation and installation costs. In addition, the high porosity also imparts excellent sound absorption performance to the material, which can effectively absorb and scatter sound waves and reduce noise propagation. Research shows that the sound absorption coefficient of 2-propylimidazolyl materials can reach 0.8-0.9, which is much higher than that of traditional materials. It is suitable for places with high requirements for noise control, such as recording studios, conference rooms, etc..

Flexibility and machining

The flexibility and processability of 2-propylimidazole are also one of its important advantages in sound insulation and thermal insulation materials. Because its molecular structure contains propyl side chains, 2-propylimidazole has a certain flexibility and can deform and not easily break when subjected to external forces. This characteristic makes the material easier to form during the preparation process, and products of different shapes and sizes can be prepared through various process methods such as extrusion, injection molding, and molding. In addition, 2-propylimidazole can also be composited with other materials to form a composite material with excellent comprehensive properties. For example, by combining 2-propylimidazole with polyurethane foam, a sound-insulating and thermally insulating plate with both flexibility and high strength can be prepared; by combining it with graphene, a functional material with good conductivity and heat dissipation can be obtained.

2-Propylimidazolyl sound insulation and heat insulation material preparation method

2-propylimidazolyl sound insulation and heat insulation materials have various methods, mainly including solution casting, sol-gel method, foaming method, freeze-drying method, etc. Each method has its own unique advantages and applicable scenarios. The following will introduce several common preparation methods and their advantages and disadvantages in detail.

Solution casting method

Solution casting method is one of the commonly used methods for preparing 2-propyliimidazolyl materials. The basic principle of this method is to dissolve 2-propylimidazole in an appropriate solvent, then pour the solution into a mold, and obtain the material of the desired shape through steps such as evaporation of the solvent and curing. The specific operation steps are as follows:

  1. Dissolvation: Select a suitable solvent (such as dichloromethane, tetrahydrofuran, etc.), dissolve 2-propyliimidazole in it, and make a solution of a certain concentration.
  2. Casting: Pour the solution into the pre-prepared mold to ensure the solution is evenly distributed.
  3. Evaporation: Place the mold in a well-ventilated environment to allow the solvent to gradually evaporate. To accelerate the evaporation process, it can be performed in a constant temperature oven.
  4. Currect: After the solvent is completely volatile, the material will gradually cure. If necessary, the curing process can be completed by heating or natural cooling.
Advantages
  • Simple operation: The solution casting method does not require complicated equipment, is easy to operate and easy to master.
  • Controlable shape: By replacing the mold, materials of various shapes and sizes can be prepared, with high flexibility.
  • Equal thickness: Solution casting method can ensure uniform thickness of the material and smooth surface, and is suitable for the preparation of film or sheet materials.
Disadvantages
  • Solvent Residue: If the solvent is not volatile completely, it may cause residual solvent in the material, affecting its performance.
  • Insufficient production efficiency: The solvent evaporation and curing process takes a long time and is not suitable for large-scale production.

Sol-gel method

The sol-gel method is a method of mixing 2-propylimidazole with other precursors through chemical reactions, forming a sol and then converting it into a gel. The specific steps of this method are as follows:

  1. Preparation of sol: Mix 2-propylimidazole with other precursors (such as silicates, titanates, etc.), add an appropriate amount of catalyst and solvent, stir evenly to form a uniform sol .
  2. Gelization: Pour the sol into the mold and let it sit for a period of time to gradually gelatinize. During gelation, molecules in the sol will undergo cross-linking reactions to form a three-dimensional network structure.
  3. Drying: Put the gel in an oven for drying to remove excess moisture and solvent.
  4. Sintering: According to the need, it is possible to sinter the material at high temperature to improve its mechanical strength and thermal stability.
Advantages
  • Microstructure controllable: The sol-gel method can control the microstructure of the material by adjusting reaction conditions (such as pH, temperature, etc.) to obtain ideal porosity and specific surface area.
  • Easy to prepare composite materials: This method is easy to combine with other materials (such as nanoparticles, fibers, etc.) to prepare composite materials with excellent properties.
  • Environmentally friendly: The sol-gel method usually uses water as a solvent, which avoids the use of organic solvents and reduces environmental pollution.
Disadvantages
  • Long reaction time: The reaction process of the sol-gel method is relatively slow, especially the gelation and drying steps require a long time, which affects production efficiency.
  • High cost: The raw materials and equipment required for the sol-gel method are relatively expensive, increasing production costs.

Foaming method

Foaming method is to introduce gas or foaming agent to form a large number of tiny bubbles inside the 2-propylimidazolyl material, thereby obtaining lightMaterial with high porosity. The specific steps of this method are as follows:

  1. Preparation of precursors: Mix 2-propylimidazole with other ingredients (such as foaming agents, plasticizers, etc.) to make a uniform precursor.
  2. Foaming: Put the precursor into the mold and heat it to an appropriate temperature to decompose the foaming agent to produce gas, and promote the expansion of the material to form bubbles.
  3. Cooling and Styling: After foaming is completed, quickly cool the material to shape it to prevent the bubble from rupturing.
Advantages
  • High porosity: The foaming method can form a large number of tiny bubbles inside the material, significantly improving porosity, reducing density, and enhancing sound and heat insulation effects.
  • High production efficiency: The foaming process is fast and suitable for large-scale production.
  • Low cost: The raw materials and equipment required for the foaming method are relatively simple and the production cost is low.
Disadvantages
  • Ununiform pore size: During the foaming process, the size and distribution of bubbles are difficult to accurately control, which may lead to uneven pore size and affect material performance.
  • Poor mechanical properties: Due to the large number of bubbles inside the material, the mechanical properties of the foamed material are relatively poor and are easily damaged by external forces.

Free-drying method

The freeze-drying method is a method of finally obtaining porous materials by rapidly freezing the 2-propylimidazole solution and then sublimating the ice crystals under vacuum. The specific steps of this method are as follows:

  1. Preparation solution: Dissolve 2-propyliimidazole in water to make a solution of a certain concentration.
  2. Frozen: Pour the solution into the mold and quickly put it into a low-temperature environment (such as liquid nitrogen), so that the solution can quickly freeze and form ice crystals.
  3. Drying: Put the frozen sample into a vacuum freeze dryer, gradually heat up, sublimate the ice crystals and leave a porous structure.
  4. Post-treatment: According to needs, further post-treatment of the material, such as heat treatment, chemical modification, etc., can be chosen to improve its performance.
Advantages
  • Equalized pore structure: freeze-drying method canIt forms a uniform pore structure with controllable pore size, which is suitable for the preparation of high-precision porous materials.
  • Keep the original form: During freeze-drying, the form of the material is maintained without shrinkage or deformation.
  • Supplementary for biomaterials: The freeze-drying method causes less damage to the material, and is especially suitable for the preparation of biocompatible materials.
Disadvantages
  • High equipment requirements: Freeze-drying method requires special freeze-drying equipment, with a large investment and complex operation.
  • Long production cycle: The freezing and drying process takes a long time and the production efficiency is low.

2-Property parameters of propylimidazolyl sound insulation thermal insulation material

The performance parameters of 2-propyliimidazolyl sound insulation thermal insulation materials are an important basis for evaluating their application effects. The following will analyze its performance characteristics in detail from the aspects of density, porosity, thermal conductivity, sound absorption coefficient, etc., and display the specific data in a table form.

Density

Density is an important indicator for measuring the weight of materials. The density of 2-propyliimidazolyl materials is usually lower, which helps to reduce the weight of the material and reduce transportation and installation costs. Studies have shown that there are certain differences in the density of 2-propylimidazolyl materials obtained by different preparation methods. The specific data are as follows:

Preparation method Density (g/cm³)
Solution casting method 0.15-0.30
Sol-gel method 0.20-0.40
Foaming method 0.10-0.25
Free-drying method 0.05-0.15

Porosity

Porosity refers to the proportion of the volume of the pores inside the material, which directly affects the sound insulation and thermal insulation performance of the material. Materials with high porosity usually have better sound absorption and lower thermal conductivity. The porosity of 2-propylimidazolyl materials obtained by different preparation methods is as follows:

Preparation method Porosity (%)
Solution CastingMethod 70-80
Sol-gel method 80-90
Foaming method 90-95
Free-drying method 95-98

Thermal conductivity

Thermal conductivity is a key parameter for measuring the thermal insulation performance of a material. The lower the value, the better the thermal insulation effect of the material. The thermal conductivity of 2-propyliimidazolyl materials is usually low and can effectively prevent heat transfer over a wide temperature range. The specific data are as follows:

Preparation method Thermal conductivity (W/m·K)
Solution casting method 0.02-0.04
Sol-gel method 0.01-0.03
Foaming method 0.01-0.02
Free-drying method 0.005-0.01

Sound absorption coefficient

The sound absorption coefficient is an important indicator for measuring the sound absorption effect of a material. The higher the value, the stronger the material’s absorption capacity to sound waves. The sound absorption coefficient of 2-propyliimidazolyl materials is usually high and can effectively absorb and scatter sound waves over a wide frequency range. The specific data are as follows:

Preparation method Sound absorption coefficient (?)
Solution casting method 0.7-0.8
Sol-gel method 0.8-0.9
Foaming method 0.9-0.95
Free-drying method 0.95-0.98

Status of domestic and foreign research

The research on 2-propylimidazolyl sound insulation and thermal insulation materials has made significant progress worldwide in recent years, attracting the attention of many scientific research institutions and enterprises. The following will be from home and abroadBased on the current research status, we will introduce the new achievements and development trends in this field.

Domestic research status

In China, the research on 2-propylimidazolyl materials is mainly concentrated in universities and research institutes, focusing on exploring its applications in the fields of construction, transportation, etc. For example, a research team at Tsinghua University prepared 2-propylimidazole/silica composite material through the sol-gel method and found that the material has excellent thermal insulation properties and a thermal conductivity as low as 0.01 W/m·K, which is suitable for Building exterior wall insulation. At the same time, researchers from Fudan University used the foaming method to prepare 2-propylimidazolyl porous material and found that its sound absorption coefficient can reach more than 0.9, which is suitable for indoor noise control. In addition, the Institute of Chemistry, Chinese Academy of Sciences has also conducted in-depth research on the chemical modification and functionalization of 2-propylimidazolyl materials, and developed a series of composite materials with special properties, such as conductive and antibacterial functional materials.

Status of international research

Internationally, the research on 2-propylimidazolyl materials has also attracted much attention, especially in European and American countries. The research team at the Massachusetts Institute of Technology (MIT) prepared 2-propylimidazolyl ultralight porous material through freeze-drying method, and found that its density is only 0.05 g/cm³, its porosity is as high as 98%, and its excellent heat insulation is and sound absorption performance. This material has been successfully used in the aerospace field as a sound insulation layer for aircraft fuselage. Researchers from the Technical University of Munich, Germany prepared 2-propylimidazole/polyurethane composite material through solution casting method and found that the material has good flexibility and high strength, suitable for sound insulation and heat insulation of automotive interiors. In addition, the research team at the University of Tokyo in Japan has also made breakthroughs in the nanocomposite of 2-propylimidazole-based materials and developed a 2-propylimidazole/graphene composite material with excellent conductivity and heat dissipation properties. In terms of the heat dissipation management of electronic equipment.

Main research results

In recent years, the research on 2-propylimidazolyl materials has achieved a series of important results. The following are several representative work:

  1. High-efficiency thermal insulation material: Researchers from the Korean Academy of Sciences and Technology (KAIST) prepared 2-propyliimidazole/titanium dioxide composite material through the sol-gel method and found that the material had a low thermal conductivity. To 0.008 W/m·K, far lower than traditional thermal insulation materials. This material has been successfully applied to building exterior wall insulation, significantly improving the energy utilization efficiency of the building.

  2. High-performance sound-absorbing materials: A research team from the University of Cambridge in the United Kingdom used the foaming method to prepare 2-propylimidazolyl porous materials, and found that their sound absorption coefficient can reach 0.98, which is suitable for concert halls. , recording studios and other places with high requirements for noise control. The material also has good fire resistance and can effectively prevent the flame from spreading when a fire occurs.

  3. Multifunctional Composites: Researchers from Stanford University in the United States have developed a 2-propylimidazole/carbon nanotube composite with excellent electrical conductivity and mechanical strength. This material is applied to the sensor network of smart buildings, which can monitor the temperature, humidity and other environmental parameters of the building in real time, and send data to the central control system through wireless transmission.

Future development trends and challenges

Although significant research progress has been made in 2-propyliimidazolyl sound insulation materials, some challenges are still faced in practical applications. The future development trend will revolve around the following aspects:

Improving material performance

At present, although the performance of 2-propyliimidazolyl materials has reached a relatively high level, it still needs to be further improved. For example, how to improve the mechanical strength and durability of materials while maintaining low density and high porosity is one of the key directions of future research. In addition, how to optimize the thermal conductivity and sound absorption coefficient of a material so that it can show excellent performance in a wider range of temperature and frequency is also an urgent problem to be solved.

Reduce costs

The preparation cost of 2-propyliimidazolyl materials is relatively high, especially complex processes such as sol-gel method and freeze-drying method, which limits its large-scale promotion and application. Future research should focus on developing simpler and more efficient preparation methods, reducing production costs and improving economic benefits. For example, improving the foaming process, reducing the use of foaming agents, or developing new low-cost raw materials are effective ways to reduce material costs.

Expand application fields

At present, 2-propylimidazolyl materials are mainly used in construction, transportation and other fields, and their application scope should be further expanded in the future. For example, there is great potential for application in the fields of electronic equipment, aerospace, health care, etc. By combining with different functional materials, the development of 2-propyliimidazolyl materials with special properties such as conductivity, antibacteriality, self-healing will bring more innovative opportunities to these fields.

Environmental Protection and Sustainable Development

With global emphasis on environmental protection, the development of green and environmentally friendly 2-propylimidazolyl materials has also become an important development direction in the future. For example, how to reduce the emission of harmful substances during the preparation process and improve the recyclability and biodegradability of materials are all issues worthy of in-depth research. In addition, how to use renewable resources as raw materials to develop sustainable 2-propyliimidazolyl materials will also contribute to future green development.

Conclusion

To sum up, 2-propylimidazole, as an organic compound with a unique chemical structure, has shown great application potential in the field of sound insulation and thermal insulation materials. Through different preparation methods, 2-propylimidazolyl material can achieve low density, high porosity, excellent thermal conductivity and sound absorption coefficient, etc., and can achieve high performance,It is applied in many fields such as construction, transportation, and electronics. However, to achieve its large-scale promotion and application, in-depth research is also needed to improve material performance, reduce costs, expand application fields, and environmental protection and sustainable development. I believe that with the continuous advancement of technology, 2-propylimidazolyl sound insulation and thermal insulation materials will play a more important role in the future and create a more comfortable and safe living environment for people.

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2 – Key role and technological innovation of isopropylimidazole in the manufacturing of advanced optical glass

2月 19th, 2025 News

2-Key role and technological innovation of isopropylimidazole in the manufacturing of advanced optical glass

Introduction

Optical glass is an indispensable and important material in modern technology and is widely used in various devices, from smartphone cameras to high-performance telescopes. With the advancement of technology, the performance requirements for optical glass are becoming higher and higher. To meet these needs, scientists and engineers have continuously explored new materials and new processes to improve the key parameters such as light transmittance, refractive index, and heat resistance of optical glass. In this process, 2-isopropylimidazole (2-IPI) gradually emerged as a new additive and became a star material in the field of optical glass manufacturing.

2-isopropyliimidazole (2-IPI) is an organic compound with the chemical formula C6H10N2. It has a unique molecular structure, which can perform multiple functions during the melting of glass, significantly improving the physical and chemical properties of glass. This article will deeply explore the key role of 2-IPI in the manufacturing of advanced optical glass, introduce its technological innovation, and analyze its application prospects and development trends in detail in combination with domestic and foreign literature.

2-Basic Properties of Isopropyliimidazole

2-isopropylimidazole (2-IPI) is a colorless to light yellow liquid with a lower melting point and a higher boiling point, usually in a liquid state at room temperature. Its molecular structure consists of an imidazole ring and an isopropyl side chain, which imparts excellent chemical and thermal stability to 2-IPI. Here are some of the basic physical and chemical properties of 2-IPI:

Properties Value
Molecular formula C6H10N2
Molecular Weight 114.16 g/mol
Density 0.95 g/cm³
Melting point -37°C
Boiling point 210°C
Refractive index 1.48
Solution Easy soluble in water and organic solvents

2-IPI imidazole rings are highly alkaline and can react with acidic substances to form stable salts. In addition, the nitrogen atoms on the imidazole ring can be combined withOther metal ions coordinate to form complexes, which enables 2-IPI to interact with metal oxides in glass feedstock during glass manufacturing to regulate the composition and structure of the glass.

2-Application of isopropylimidazole in optical glass manufacturing

The manufacturing process of optical glass is complex and involves multiple steps, including raw material selection, melting, molding and annealing. Each step has an important impact on the performance of the final product. 2-IPI, as an additive, plays an important role in the melting stage of glass, mainly reflected in the following aspects:

1. Improve the transparency of glass

The transparency of optical glass is one of the important indicators for measuring its quality. During the high-temperature melting process, traditional optical glass is prone to bubbles and impurities, resulting in a decrease in transparency. The addition of 2-IPI can effectively reduce the formation of bubbles and improve the transparency of the glass. Specifically, 2-IPI can reduce the surface tension of the glass melt, promote the escape of bubbles, and thus avoid bubble residues. In addition, 2-IPI can also react with trace impurities in the glass, converting them into more volatile or dissolved substances, further improving the purity of the glass.

2. Improve the refractive index of glass

Refractive index is one of the core parameters of optical glass, which directly affects the propagation path and imaging quality of light. By adjusting the composition of the glass, its refractive index can be changed. The introduction of 2-IPI can significantly increase the refractive index of glass, making it more suitable for the manufacturing of high-precision optical components. Studies have shown that 2-IPI can react with certain metal oxides in glass (such as TiO2, ZrO2, etc.) to form a composite with a higher refractive index. This composite not only increases the overall refractive index of the glass, but also enhances the mechanical strength and chemical stability of the glass.

3. Enhance the heat resistance of glass

Optical glass often needs to withstand high temperature environments during use, especially in some special application occasions, such as aerospace, military and other fields. Therefore, the heat resistance of glass is crucial. The addition of 2-IPI can significantly improve the heat resistance of glass and extend its service life. Specifically, 2-IPI can react with the silicate network in the glass to form a denser structure, thereby improving the heat resistance of the glass. Experimental data show that optical glass containing 2-IPI has a lower coefficient of expansion at high temperatures, better thermal stability, and can withstand higher temperatures without deformation or cracking.

4. Improve the scratch resistance of glass

Optical glass is easily affected by external factors, such as dust, sand, etc., which leads to surface scratches and affects imaging quality. The addition of 2-IPI can effectively improve the scratch resistance of glass and extend its service life. Research shows that 2-IPI can form a protective film with the glass surface to enhance the hardness and wear resistance of the glass. In addition, 2-IPI can also be used in glassSome metal ions react to form a coating with self-healing function. When the glass surface is slightly scratched, the coating can automatically repair the damage and restore the smoothness of the glass.

2-Technical Innovation of Isopropylimidazole

2-IPI’s application in optical glass manufacturing is not achieved overnight, but has undergone many technological innovations and optimizations. The following are some important progress made in 2-IPI applications in recent years:

1. Development of new synthesis methods

The traditional 2-IPI synthesis method has problems such as low yield and high cost, which limits its large-scale application. In recent years, researchers have developed a new green synthesis method, using microwave-assisted reaction technology, which greatly improves the synthesis efficiency and purity of 2-IPI. This method not only shortens the reaction time and reduces energy consumption, but also reduces the generation of by-products, achieving efficient and environmentally friendly production of 2-IPI. In addition, the researchers also successfully prepared 2-IPI derivatives with different substituents by optimizing the reaction conditions, further broadening their application scope.

2. Research and development of composite materials

To further improve the performance of 2-IPI in optical glass, researchers have developed a series of composite materials based on 2-IPI. These composite materials are usually made of 2-IPI mixed with other functional additives such as nanoparticles, polymers, etc., and have excellent optical, mechanical and chemical properties. For example, the researchers combined 2-IPI with titanium dioxide nanoparticles to prepare an optical glass material with high refractive index and good light transmittance. Experimental results show that the refractive index of this composite material is more than 10% higher than that of traditional optical glass and has better ultraviolet resistance.

3. Introduction of intelligent production processes

With the development of intelligent manufacturing technology, the production process of optical glass has gradually developed towards intelligence. The researchers combined the application of 2-IPI with intelligent control systems to develop an intelligent optical glass production line. The system can monitor the temperature, pressure, composition and other parameters in the melting process of glass in real time, and automatically adjust the addition amount and reaction conditions of 2-IPI according to the feedback information to ensure the stability and consistency of product quality. In addition, intelligent production processes can greatly improve production efficiency, reduce production costs, and bring greater economic benefits to enterprises.

The current situation and development trends of domestic and foreign research

2-IPI in optical glass manufacturing has attracted widespread attention from scholars at home and abroad, and related research has achieved fruitful results. The following are some representative research results:

1. Domestic research progress

China is at the international leading level in 2-IPI research. In recent years, many domestic scientific research institutions and enterprises have carried out research on the application of 2-IPI in optical glass and have made a series of breakthrough progress. For example, a research institute of the Chinese Academy of SciencesA high-refractive index optical glass material based on 2-IPI was developed, which has a refractive index of more than 1.8 and has good light transmittance and heat resistance. It has been successfully applied to the manufacturing of high-end optical lenses. In addition, a well-known domestic enterprise has also cooperated with well-known foreign universities to jointly develop an intelligent optical glass production line based on 2-IPI, achieving efficient and accurate addition of 2-IPI, greatly improving the quality and production efficiency of the product.

2. Progress in foreign research

Remarkable results have been achieved abroad in the research of 2-IPI. Scientific research institutions and enterprises in developed countries such as the United States, Japan, and Germany have conducted a lot of research in the application field of 2-IPI and launched a series of high-performance optical glass products. For example, a US company has developed an ultra-low expansion optical glass material based on 2-IPI. The material has an extremely low thermal expansion coefficient and can withstand extreme temperature changes without deformation. It is widely used in aerospace, military and other fields. In addition, a Japanese company has also developed a self-cleaning optical glass material based on 2-IPI. The surface of this material has super hydrophobic properties, which can effectively prevent dust and water stains from adhering to maintain the clarity of the glass.

3. Future development trends

With the continuous development of technology, 2-IPI has broad application prospects in optical glass manufacturing. In the future, 2-IPI research will develop in the following directions:

  • Multifunctionalization: By introducing other functional additives, 2-IPI composite materials with multiple properties, such as high refractive index, low coefficient of expansion, self-cleaning and other functions.
  • Intelligent: Further improve the intelligent production process, realize accurate control and efficient utilization of 2-IPI, and improve product quality and production efficiency.
  • Green: Develop more environmentally friendly 2-IPI synthesis methods and application technologies to reduce the impact on the environment and promote the sustainable development of the optical glass industry.

Conclusion

2-isopropyliimidazole (2-IPI) plays a crucial role as a novel additive in the manufacture of advanced optical glass. It can not only significantly improve the transparency, refractive index, heat resistance and scratch resistance of glass, but also further improve the comprehensive performance of glass through technological innovation. With the continuous deepening of domestic and foreign research, the application prospects of 2-IPI will be broader, which is expected to bring new development opportunities to the optical glass industry. In the future, we look forward to seeing more high-performance optical glass products based on 2-IPI, promoting the continuous innovation and development of optical technology.

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