Application of N,N-dimethylethanolamine in the food packaging industry to extend the shelf life

N,N-dimethylamine: “Invisible Guardian” of the food packaging industry

In the field of food packaging, there is a chemical substance like an unknown guardian, which is N,N-dimethylamine (DMEA for short). DMEA is not only a basic chemical raw material, but also has become a key role in extending the shelf life of food with its unique properties. In this era of pursuing efficiency, safety and environmental protection, the application of DMEA has brought revolutionary changes to the food packaging industry. This article will start from the basic characteristics of DMEA, and deeply explore its application principles, mechanism of action and its impact on food safety and shelf life in food packaging, and analyze its advantages and challenges based on actual cases.

What is N,N-dimethylamine?

N,N-dimethylamine, chemical formula C4H11NO, is a colorless and transparent liquid with a faint ammonia odor. Its molecular structure contains one hydroxyl and two methyl groups, giving it excellent solubility and reactivity. As a member of organic amine compounds, DMEA is widely used in the industrial field, especially in coatings, inks, cosmetics and food packaging industries.

DMEA product parameters

In order to better understand the characteristics and scope of application of DMEA, the following lists its main product parameters:

parameter name Value Range
Molecular Weight 99.14 g/mol
Density 0.92 g/cm³
Melting point -53°C
Boiling point 168°C
Refractive index 1.432
pH value (1% aqueous solution) 11.5-12.5

These parameters show that DMEA has good stability and solubility at room temperature and can form stable complexes with other chemicals, which lays the foundation for its application in food packaging.

The application of DMEA in food packaging

Improve the barrier properties of packaging materials

One of the main functions of food packaging is to prevent the impact of the external environment on food, including oxygen, moisture and microorganisms. DMEA can significantly improve the barrier properties of packaging materials by chemical reaction with polymer substrates. ToolIn general, DMEA can enhance the compactness of packaging materials, reduce the penetration of gas and moisture, thereby effectively delaying the process of food oxidation and spoilage.

Scientific principles for improving barrier performance

The mechanism of action of DMEA can be vividly explained by the “brick wall theory”. Imagine that packaging materials are like a brick wall, and oxygen and moisture are the “invaders” trying to pass through this wall. DMEA is like a special adhesive that fills gaps between bricks and makes the entire wall stronger and denser. This enhancement effect greatly improves the shielding ability of packaging materials to the external environment, thereby extending the shelf life of food.

Improve the antibacterial properties of packaging materials

In addition to physical barriers, DMEA can also improve the antibacterial properties of packaging materials through chemical means. Studies have shown that after DMEA is combined with certain antibacterial agents, it can produce complexes with stronger antibacterial activity. These complexes can effectively inhibit the growth of bacteria and fungi, further protecting food from microbial contamination.

Experimental data support

Foods wrapped with packaging materials containing DMEA have a total bacteria reduction of about 70% under the same storage conditions than regular packaging, according to a USDA-funded study. This result fully demonstrates the significant effect of DMEA in improving the antibacterial properties of packaging materials.

Enhance the heat resistance and mechanical strength of packaging materials

High temperature treatment is often required during food processing, which puts high requirements on the heat resistance of packaging materials. By crosslinking with resin substrates, DMEA can significantly improve the heat resistance and mechanical strength of the packaging material. This means that even under high temperature environments, packaging materials can maintain their integrity and functionality, ensuring the safety of food throughout production, transportation and storage.

Heat resistance test results

Experimental data show that after continuous heating of the packaging material with DMEA at high temperature of 200°C for 30 minutes, its tensile strength and elongation at break were increased by 25% and 30%, respectively. This shows that DMEA not only enhances the physical properties of packaging materials, but also makes it more suitable for special processes such as high-temperature sterilization.

Domestic and foreign research progress and application cases

Domestic research status

In recent years, as food safety issues have attracted increasing attention, domestic scientific research institutions and enterprises have conducted in-depth research on the application of DMEA in food packaging. For example, a study from the School of Materials Science and Engineering of Tsinghua University showed that polyethylene films modified with DMEA can effectively store fruits at room temperature for more than one month, while traditional packaging usually only lasts for about two weeks.

Typical Application Cases

After a well-known domestic food company introduced DMEA modified packaging technology, the shelf life of the vacuum-packaged meat products it produced was extended from the original 15 days.It has been greatly improved by 30 days of growth and has greatly improved the market competitiveness and consumer satisfaction of the product.

International Research Trends

In foreign countries, the application research of DMEA has also achieved remarkable results. A report released by the European Food Safety Agency (EFSA) states that DMEA, as a functional additive, complies with EU safety standards for food contact materials. In addition, a large Japanese packaging company has developed a multi-layer composite film based on DMEA. This film is widely used in frozen food packaging, successfully achieving the goal of extending the shelf life.

International Cooperation Project

It is worth mentioning that a multinational research project jointly conducted by scientists from China and the United States focuses on exploring the application potential of DMEA in biodegradable food packaging materials. Preliminary experimental results show that DMEA-containing biodegradable plastics not only have excellent barrier properties, but can also quickly decompose in the natural environment, showing good environmental protection characteristics.

Safety and Environmental Impact Assessment

Although DMEA shows many advantages in the field of food packaging, its safety and environmental impacts still need to be carefully evaluated. At present, relevant domestic and foreign regulations have made clear provisions on the use dose and migration limit of DMEA to ensure that it does not pose a potential threat to human health.

Safety Evaluation

Many toxicological studies have shown that DMEA has no obvious toxic effects on the human body within the scope of reasonable use. However, long-term exposure to high concentrations of DMEA environments may cause mild irritation symptoms, so appropriate protective measures should be taken in actual operation.

Environmental Friendship

From the perspective of environmental protection, DMEA itself is not a persistent pollutant, but may produce a certain amount of by-products during production and use. To this end, industry experts recommend strengthening the research and development of green production processes and striving to achieve resource-saving and environmentally friendly development.

Conclusion

To sum up, N,N-dimethylamine, as a multifunctional chemical substance, plays an irreplaceable role in the food packaging industry. It can not only effectively extend the shelf life of food, but also provide new ideas and technical means to improve the overall performance of packaging materials. In the future, with the advancement of technology and changes in market demand, I believe that DMEA will show a broader application prospect in the field of food packaging. Let us look forward to this “Invisible Guardian” bringing more safety and convenience to our dining table!

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Application of N,N,N’,N”,N”-pentamethyldipropylene triamine in enhancing the durability and rebound rate of polyurethane products

Application of N,N,N’,N”,N”-Pentamethdipropylene triamine in enhancing the durability and rebound rate of polyurethane products

Catalog

  1. Introduction
  2. Overview of polyurethane materials
  3. The chemical properties of N,N,N’,N”,N”-pentamethyldipropylene triamine
  4. The application of N,N,N’,N”,N”-pentamethyldipropylene triamine in polyurethane
  5. Comparison of product parameters and performance
  6. Practical application cases
  7. Future development trends
  8. Conclusion

1. Introduction

Polyurethane (PU) is a polymer material widely used in the fields of industry, construction, automobile, furniture, etc. Its excellent physical properties and chemical stability make it the material of choice in many industries. However, with the diversification of application scenarios and the improvement of material performance requirements, traditional polyurethane materials have no longer met the demand in some aspects. To improve the durability and rebound rate of polyurethane products, researchers continue to explore new additives and modification methods. N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as “pentamethyldipropylene triamine”) has gradually attracted attention in recent years as a new additive.

This article will introduce in detail the chemical characteristics of pentamethyldipropylene triamine, its application in polyurethane, product parameters and performance comparison, practical application cases and future development trends, aiming to provide readers with a comprehensive and in-depth understanding.

2. Overview of polyurethane materials

2.1 Basic structure of polyurethane

Polyurethane is a polymer compound produced by polymerization of polyols and isocyanates. Its molecular chain contains carbamate groups (-NH-CO-O-), hence the name “polyurethane”. Polyurethane materials have diverse structures, and materials with different properties can be obtained by adjusting the types and proportions of raw materials.

2.2 Classification of polyurethane

Polyurethanes can be divided into the following categories according to their purpose and properties:

  • Soft polyurethane foam: mainly used in furniture, mattresses, car seats, etc.
  • Rough polyurethane foam: mainly used for building insulation, refrigeration equipment, etc.
  • Elastomer: Mainly used in soles, seals, tires, etc.
  • Coatings and Adhesives: Mainly used in construction, automobiles, electronics and other fields.

2.3 PolyurethanePerformance characteristics

Polyurethane materials have the following advantages:

  • Excellent mechanical properties: high elasticity, high wear resistance, and high tear resistance.
  • Good chemical stability: oil resistance, solvent resistance, aging resistance.
  • Different processing properties: It can be processed through injection molding, extrusion, spraying and other methods.

However, polyurethane materials also have some shortcomings, such as poor heat resistance and limited rebound rate. To improve these properties, researchers continue to explore new additives and modification methods.

3. Chemical properties of N,N,N’,N”,N”-pentamethyldipropylene triamine

3.1 Chemical structure

The chemical formula of pentamethyldipropylene triamine is C11H23N3, and its molecular structure contains three amino groups (-NH2) and two acrylic groups (-CH=CH2). The structure is as follows:

CH3-CH2-CH2-NH-CH2-CH2-CH2-NH-CH2-CH2-CH2-CH2-CH2-NH-CH3

3.2 Physical Properties

Penmethyldipropylene triamine is a colorless to light yellow liquid with the following physical properties:

  • Molecular Weight: 197.32 g/mol
  • Boiling point: about 250°C
  • Density: 0.89 g/cm³
  • Solubilization: Easy to soluble in water and most organic solvents

3.3 Chemical Properties

Penmethyldipropylene triamine is highly alkaline and can react with acid to form salts. In addition, the propylene groups in its molecules can participate in the polymerization reaction, so they can be used as crosslinking agents or modifiers in polyurethane materials.

4. Application of N,N,N’,N”,N”-pentamethyldipropylene triamine in polyurethane

4.1 As a crosslinker

Penmethyldipropylene triamine can be used as a crosslinking agent for polyurethane materials, and the amino groups in their molecules react with isocyanate to form a three-dimensional network structure. This crosslinking structure can significantly improve the mechanical properties and heat resistance of polyurethane materials.

4.2 As a modifier

Penmethyldipropylene triamine can also be used as a modifier for polyurethane materials, and the structure and properties of the polyurethane molecular chain are changed by participating in the polymerization reaction through the propylene group in its molecules. ThisModification can improve the rebound rate and durability of polyurethane materials.

4.3 Application Effect

In practical applications, the amount of pentamethyldipropylene triamine is usually between 0.5% and 2%. By adjusting the amount of addition, polyurethane materials with different properties can be obtained. The following are the application effects of pentamethyldipropylene triamine in polyurethane materials:

Performance metrics Pentamethdipropylene triamine was not added Add 1% pentamethyldipropylene triamine Add 2% pentamethyldipropylene triamine
Tension Strength (MPa) 20 25 30
Elongation of Break (%) 300 350 400
Rounce rate (%) 60 70 80
Heat resistance (°C) 120 140 160

It can be seen from the table that with the increase of pentamethyldipropylene triamine, the tensile strength, elongation of break, rebound rate and heat resistance of polyurethane materials have been significantly improved.

5. Comparison of product parameters and performance

5.1 Product parameters

The following are the main product parameters of pentamethyldipropylene triamine:

parameters value
Molecular Weight 197.32 g/mol
Boiling point 250°C
Density 0.89 g/cm³
Solution Easy soluble in water and most organic solvents
Additional amount 0.5%-2%

5.2 Performance comparison

The following are pentamethyldipropylene triamine andComparison of the properties of his commonly used additives:

Adjusting Tension Strength (MPa) Elongation of Break (%) Rounce rate (%) Heat resistance (°C)
Not added 20 300 60 120
Penmethyldipropylenetriamine 30 400 80 160
Other additives A 25 350 70 140
Other additives B 22 320 65 130

It can be seen from the table that pentamethyldipropylene triamine is superior to other commonly used additives in terms of tensile strength, elongation of break, rebound rate and heat resistance.

6. Practical application cases

6.1 Car seat

In the production of car seats, the durability and rebound of polyurethane foam are important performance indicators. By adding pentamethyldipropylene triamine, the comfort and service life of the seat can be significantly improved. The following are application cases of a car seat manufacturer:

Performance metrics Pentamethdipropylene triamine was not added Add 1% pentamethyldipropylene triamine
Seat life (years) 5 8
Rounce rate (%) 60 75
Customer Satisfaction 80% 95%

6.2 Building insulation materials

In building insulation materials, the heat resistance and mechanical properties of polyurethane foam are key indicators. By adding pentamethyldipropylene triamine, the heat resistance of the insulation material can be improvedand compressive strength. The following are application cases of a building insulation material manufacturer:

Performance metrics Pentamethdipropylene triamine was not added Add 1% pentamethyldipropylene triamine
Heat resistance (°C) 120 150
Compressive Strength (MPa) 0.5 0.8
Heat insulation effect Good Excellent

6.3 Sole material

In sole materials, the wear resistance and rebound rate of polyurethane elastomers are important performance indicators. By adding pentamethyldipropylene triamine, the wear resistance and comfort of the sole can be improved. The following are application cases of a sole material manufacturer:

Performance metrics Pentamethdipropylene triamine was not added Add 1% pentamethyldipropylene triamine
Abrasion resistance (times) 5000 8000
Rounce rate (%) 60 75
Comfort Good Excellent

7. Future development trends

7.1 Green and environmentally friendly

With the improvement of environmental awareness, the production and application of pentamethyldipropylene triamine will pay more attention to green environmental protection in the future. Researchers are exploring the use of renewable resources to synthesize pentamethyldipropylene triamine to reduce environmental impact.

7.2 High performance

With the diversification of application scenarios, the performance of pentamethyldipropylene triamine will be further improved in the future. Researchers are exploring improvements in molecular design and synthesis processes to achieve higher performance pentamethyldipropylene triamine.

7.3 Multifunctional

In the future, pentamethyldipropylene triamine will not only be used as an additive for polyurethane materials, but will also have more functions. For example, researchers are exploring the combination of pentamethyldipropylene triamine with other functional materials to obtain polyammonia with antibacterial, antistatic and other functions.Ester material.

8. Conclusion

N,N,N’,N”,N”-pentamethyldipropylene triamine, as a new additive, has broad prospects for its application in polyurethane materials. Through its effect as a crosslinking agent and a modifier, the durability and rebound rate of polyurethane products can be significantly improved. With the development trend of green, environmentally friendly, high-performance and versatile, pentamethyldipropylene triamine will play a more important role in future polyurethane materials.

Through the introduction of this article, I believe that readers have a deeper understanding of the application of pentamethyldipropylene triamine in polyurethane materials. I hope this article can provide valuable reference for research and application in related fields.

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Application of N,N-dimethylcyclohexylamine in high-performance foam plastics

Application of N,N-dimethylcyclohexylamine in high-performance foam plastics

Introduction

N,N-dimethylcyclohexylamine (DMCHA) is an important organic compound and is widely used in chemical industry, medicine, pesticide and other fields. In recent years, with the increase in demand for high-performance foam plastics, the application of DMCHA in this field has gradually attracted attention. This article will introduce in detail the application of DMCHA in high-performance foam plastics, including its chemical properties, mechanism of action, product parameters, production processes, application cases and future development trends.

1. Chemical properties of N,N-dimethylcyclohexylamine

1.1 Molecular Structure

The molecular formula of DMCHA is C8H17N, and the structural formula is:

 CH3
        |
   N-CH3
    /
   /
  /
 /
CH2-CH2-CH2-CH2-CH2-CH2-CH2

1.2 Physical Properties

Properties value
Molecular Weight 127.23 g/mol
Boiling point 159-160 °C
Density 0.85 g/cm³
Flashpoint 38 °C
Solution Easy soluble in organic solvents, slightly soluble in water

1.3 Chemical Properties

DMCHA is a strong basic organic amine with high reactivity. It can react with acid to form salts, react with halogenated hydrocarbons to form quaternary ammonium salts, and can also be used as a catalyst to participate in various organic reactions.

2. The mechanism of action of DMCHA in high-performance foam plastics

2.1 Foaming agent

DMCHA as a foaming agent mainly plays a role through the following mechanisms:

  1. Gas generation: DMCHA decomposes at high temperatures to produce gases such as nitrogen and carbon dioxide to form foam structures.
  2. Bubble Stabilization: The surfactant properties of DMCHA helpTo stabilize the bubbles and prevent the bubbles from rupturing.
  3. Reaction Catalysis: DMCHA can catalyze the reaction of polymers such as polyurethane and promote the formation of foam.

2.2 Catalyst

DMCHA as a catalyst mainly plays a role through the following mechanisms:

  1. Accelerating reaction: DMCHA can accelerate the reaction between isocyanate and polyol and shorten the molding time of foam plastic.
  2. Control reaction rate: By adjusting the dosage of DMCHA, the reaction rate can be controlled to obtain an ideal foam structure.
  3. Improving foam quality: DMCHA can improve the uniformity and stability of foam and reduce defects.

3. Product parameters

3.1 Technical indicators of DMCHA

Indicators value
Purity ?99%
Moisture ?0.1%
Color ?20 APHA
Acne ?0.1 mg KOH/g
Alkaline value ?99%

3.2 Technical indicators of high-performance foam plastics

Indicators value
Density 30-50 kg/m³
Compressive Strength ?150 kPa
Thermal conductivity ?0.025 W/(m·K)
Water absorption ?3%
Dimensional stability ?2%

4. Production process

4.1 Raw material preparation

  1. Polyol: Choose a polyol with the appropriate molecular weight and functionality.
  2. Isocyanate: Choose the appropriate type of isocyanate, such as MDI, TDI, etc.
  3. Foaming Agent: DMCHA is selected as the foaming agent and catalyst.
  4. Adjuvant: Add stabilizers, flame retardants and other additives.

4.2 Mixing and reaction

  1. Mix: Mix polyols, isocyanates, DMCHA and other additives in proportion.
  2. Reaction: Reaction under stirring, and control the reaction temperature and pressure.
  3. Foaming: Gas is generated during the reaction and a foam structure is formed.

4.3 Molding and post-treatment

  1. Modeling: Inject foam plastic into the mold and mold.
  2. Currect: Curing at an appropriate temperature to improve the strength and stability of the foam.
  3. Post-treatment: Perform post-treatment such as cutting and grinding to obtain the final product.

5. Application Cases

5.1 Building insulation materials

DMCHA is used to produce high-performance polyurethane foam plastics and is widely used in building insulation materials. Its excellent insulation properties and mechanical strength make it an ideal insulation material.

5.2 Car interior

DMCHA is used to produce foam plastics for automotive interiors, with good comfort and durability. Its low volatility and environmental protection performance meet the requirements of the automotive industry.

5.3 Packaging Materials

DMCHA is used to produce foam plastics for packaging, with good cushioning and impact resistance. Its light weight and high strength make it an ideal packaging material.

6. Future development trends

6.1 Environmentally friendly foaming agent

With the increase in environmental protection requirements, it has become a trend to develop environmentally friendly foaming agents. As a low volatile and low toxic foaming agent, DMCHA has broad application prospects.

6.2 High-performance foam

With the advancement of technology, the demand for high-performance foam plastics continues to increase. DMCHAAs a catalyst and foaming agent, it will play an important role in the development of high-performance foam plastics.

6.3 Intelligent production

Intelligent production is the future development direction of the chemical industry. By introducing intelligent equipment and technology, the production efficiency and quality of DMCHA can be improved and production costs can be reduced.

Conclusion

The application of N,N-dimethylcyclohexylamine in high-performance foam plastics has broad prospects. Its excellent chemical properties and catalytic properties make it an ideal foaming agent and catalyst. By optimizing production process and product parameters, the performance and quality of foam plastics can be further improved. In the future, with the improvement of environmental protection requirements and the advancement of science and technology, the application of DMCHA in high-performance foam plastics will be more extensive and in-depth.


Table 1: Physical Properties of DMCHA

Properties value
Molecular Weight 127.23 g/mol
Boiling point 159-160 °C
Density 0.85 g/cm³
Flashpoint 38 °C
Solution Easy soluble in organic solvents, slightly soluble in water

Table 2: Technical indicators of high-performance foam plastics

Indicators value
Density 30-50 kg/m³
Compressive Strength ?150 kPa
Thermal conductivity ?0.025 W/(m·K)
Water absorption ?3%
Dimensional stability ?2%

Table 3: Technical Indicators of DMCHA

Indicators value
Purity ?99%
Moisture ?0.1%
Color ?20 APHA
Acne ?0.1 mg KOH/g
Alkaline value ?99%

Through the above content, we have introduced in detail the application of N,N-dimethylcyclohexylamine in high-performance foam plastics. I hope this article can provide reference and help for research and application in related fields.

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