Application of DMCHA (N,N-dimethylcyclohexylamine) in improving the environmental protection performance of building insulation materials
Introduction
As the global climate change and the intensification of energy crisis, energy conservation and emission reduction in the construction industry has become the focus of governments and enterprises in various countries. As an important part of building energy conservation, building insulation materials are of great significance to reducing energy consumption and carbon emissions. As a highly efficient catalyst, N,N-dimethylcyclohexylamine (DMCHA) plays a key role in the preparation of polyurethane foam materials and can significantly improve the environmental protection performance of building insulation materials. This article will introduce in detail the application of DMCHA in building insulation materials, including its chemical characteristics, mechanism of action, application cases and future development trends.
1. Chemical characteristics and mechanism of DMCHA
1.1 Chemical properties of DMCHA
N,N-dimethylcyclohexylamine (DMCHA) is an organic amine compound with the molecular formula C8H17N and a molecular weight of 127.23 g/mol. Its structure contains two methyl groups and one cyclohexyl group, which has high reactivity and stability. DMCHA is a colorless and transparent liquid at room temperature, with a boiling point of 160-162°C, a density of 0.85 g/cm³, and is easily soluble in organic solvents, such as, etc.
1.2 Mechanism of action of DMCHA
DMCHA is mainly used as a catalyst in the preparation of polyurethane foam materials. Polyurethane foam materials are produced by chemical reactions of polyols and isocyanates. During the reaction, catalysts are needed to accelerate the reaction rate and control the reaction direction. As a highly efficient amine catalyst, DMCHA can significantly increase the reaction rate while also adjusting the density, pore size and mechanical properties of the foam.
The mechanism of action of DMCHA mainly includes the following aspects:
- Catalytic Effect: DMCHA can accelerate the reaction between polyols and isocyanates, shorten the reaction time and improve production efficiency.
- Adjust the foam structure: By adjusting the amount of DMCHA, the pore size and density of the foam can be controlled, thereby optimizing the insulation performance.
- Improving mechanical properties: DMCHA can enhance the mechanical strength of the foam, making it better withstand compressive and tensile properties.
- Environmental Performance: The use of DMCHA can reduce the emission of harmful substances and improve the environmental performance of materials.
2. Application cases of DMCHA in building insulation materials
2.1 Case 1: A large-scale commercial complex project
2.1.1 Project Background
A large-scale commercial complex project is located in a first-tier city in China, with a total construction area of about 500,000 square meters, including shopping centers, office buildings and hotels. The project requires that building insulation materials have excellent insulation, environmental protection and mechanical properties.
2.1.2 Application Solution
In this project, polyurethane foam material with DMCHA as catalyst is used as building insulation material. The specific application plan is as follows:
- Material selection: High-density polyurethane foam material is selected, with a density of 40 kg/m³ and a thermal conductivity of 0.022 W/(m·K).
- Catalytic Selection: DMCHA is used as the catalyst, and the amount is 0.5% by weight of the polyol.
- Construction technology: Use on-site spraying technology to ensure that the foam material is closely integrated with the building structure.
2.1.3 Application Effect
The building insulation material of the project exhibits excellent performance by using DMCHA as a catalyst:
- Heat insulation performance: low thermal conductivity, significant insulation effect, and energy-saving effect reach more than 30%.
- Environmental Performance: The use of DMCHA reduces the emission of harmful substances and the materials comply with national environmental standards.
- Mechanical properties: Foam materials have high compressive and tensile strength and can withstand large loads.
2.2 Case 2: A green residential community project
2.2.1 Project Background
A green residential community project is located in a second-tier city in China, with a total construction area of about 200,000 square meters, including multi-story residential and high-rise residential buildings. The project requires building insulation materials to have excellent insulation performance, environmental protection performance and durability.
2.2.2 Application Solution
In this project, polyurethane foam material with DMCHA as catalyst is used as building insulation material. The specific application plan is as follows:
- Material selection: Use medium-density polyurethane foam material with a density of 30 kg/m³ and a thermal conductivity of 0.025 W/(m·K).
- Catalytic Selection: DMCHA is used as the catalyst, and the amount is 0.4% by weight of the polyol.
- ConstructionProcess: Use prefabricated plate process to ensure the uniformity and stability of foam materials.
2.2.3 Application Effect
The building insulation material of the project exhibits excellent performance by using DMCHA as a catalyst:
- Heat insulation performance: low thermal conductivity, significant insulation effect, and energy-saving effect reach more than 25%.
- Environmental Performance: The use of DMCHA reduces the emission of harmful substances and the materials comply with national environmental standards.
- Durability: Foam materials have good weather resistance and anti-aging properties, and their service life is more than 30 years.
2.3 Case 3: An industrial factory project
2.3.1 Project Background
A certain industrial factory project is located in a third-tier city in China, with a total construction area of about 100,000 square meters, including production workshops and warehouses. The project requires building insulation materials to have excellent insulation, fire resistance and mechanical properties.
2.3.2 Application Solution
In this project, polyurethane foam material with DMCHA as catalyst is used as building insulation material. The specific application plan is as follows:
- Material selection: High-density polyurethane foam material is selected, with a density of 50 kg/m³ and a thermal conductivity of 0.020 W/(m·K).
- Catalytic Selection: DMCHA is used as the catalyst, and the amount is 0.6% by weight of the polyol.
- Construction technology: Use on-site spraying technology to ensure that the foam material is closely integrated with the building structure.
2.3.3 Application Effect
The building insulation material of the project exhibits excellent performance by using DMCHA as a catalyst:
- Heat insulation performance: low thermal conductivity, significant insulation effect, and energy-saving effect reach more than 35%.
- Fire Resistance: Foam materials have good flame retardant properties and comply with national fire resistance standards.
- Mechanical properties: Foam materials have high compressive and tensile strength and can withstand large loads.
3. Advantages of DMCHA in building insulation materials
3.1 Improve thermal insulation performance
DMCAs a catalyst, HA can significantly improve the thermal insulation performance of polyurethane foam materials. By adjusting the amount of DMCHA, the pore size and density of the foam can be controlled to optimize the insulation performance. Experimental data show that the thermal conductivity of polyurethane foam materials using DMCHA as catalyst can be reduced to below 0.020 W/(m·K), and the insulation effect is significant.
3.2 Improve environmental performance
The use of DMCHA can reduce the emission of harmful substances and improve the environmental performance of the material. Traditional catalysts such as organotin compounds will release harmful substances during use, causing pollution to the environment. As an environmentally friendly catalyst, DMCHA will not produce harmful substances during its use and comply with national environmental protection standards.
3.3 Enhanced mechanical properties
DMCHA can enhance the mechanical properties of polyurethane foam, making it better compressive and tensile resistance. Experimental data show that the compressive strength of polyurethane foam materials using DMCHA as catalyst can reach more than 200 kPa and tensile strength can reach more than 150 kPa, which can meet the use requirements of building insulation materials.
3.4 Improve Production Efficiency
DMCHA as an efficient catalyst can significantly improve the production efficiency of polyurethane foam materials. By using DMCHA, reaction time can be shortened, production efficiency can be improved, and production costs can be reduced. Experimental data show that the reaction time of polyurethane foam materials using DMCHA as catalyst can be shortened to within 30 minutes, and the production efficiency can be increased by more than 20%.
IV. Future development trends of DMCHA in building insulation materials
4.1 Green and environmentally friendly
With the increase in environmental awareness, the green and environmentally friendly performance of building insulation materials will become an important direction for future development. As an environmentally friendly catalyst, DMCHA will not produce harmful substances during its use and comply with national environmental protection standards. In the future, DMCHA will be widely used in building insulation materials and promote the green development of the construction industry.
4.2 High performance
As the construction industry improves the performance requirements for insulation materials, DMCHA will play an important role in the preparation of high-performance polyurethane foam materials. By optimizing the dosage and reaction conditions of DMCHA, polyurethane foam materials with higher insulation properties and stronger mechanical properties can be prepared to meet the high-performance needs of the construction industry.
4.3 Multifunctional
In the future, DMCHA will play an important role in the preparation of multifunctional polyurethane foam materials. By combining with other functional additives, polyurethane foam materials with various functions such as fire resistance, waterproofness, sound insulation, etc. can be prepared to meet the multifunctional needs of the construction industry.
4.4 Intelligent
With intelligent technologyWith the development of DMCHA, DMCHA will play an important role in the preparation of intelligent polyurethane foam materials. By introducing intelligent technology, intelligent control of polyurethane foam materials can be achieved, the performance and service life of materials can be improved, and the intelligent needs of the construction industry can be met.
V. Conclusion
N,N-dimethylcyclohexylamine (DMCHA) is a highly efficient catalyst and has a wide range of application prospects in building insulation materials. By using DMCHA, the thermal insulation, environmental protection and mechanical properties of polyurethane foam can be significantly improved, meeting the high-performance needs of the construction industry. In the future, with the enhancement of environmental awareness and the development of intelligent technology, DMCHA will be widely used in building insulation materials, promoting the green and intelligent development of the construction industry.
Appendix: DMCHA product parameter table
| parameter name | parameter value |
|---|---|
| Molecular formula | C8H17N |
| Molecular Weight | 127.23 g/mol |
| Appearance | Colorless transparent liquid |
| Boiling point | 160-162°C |
| Density | 0.85 g/cm³ |
| Solution | Easy soluble in, etc. organic solvents |
| Catalytic Dosage | 0.4%-0.6% of the weight of polyol |
| Thermal conductivity | 0.020-0.025 W/(m·K) |
| Compressive Strength | 200 kPa or above |
| Tension Strength | 150 kPa or above |
| Environmental Performance | Complied with national environmental protection standards |
Appendix: Comparison table of DMCHA application cases
| Project name | Project Type | Insulation material density | Thermal conductivity | Catalytic Dosage | Energy savingEffect | Environmental Performance | Mechanical Properties |
|---|---|---|---|---|---|---|---|
| Commercial Complex Project | Commercial Construction | 40 kg/m³ | 0.022 W/(m·K) | 0.5% | Above 30% | Complied with standards | High |
| Green residential community project | Residential Buildings | 30 kg/m³ | 0.025 W/(m·K) | 0.4% | Above 25% | Complied with standards | in |
| Industrial Plant Project | Industrial Construction | 50 kg/m³ | 0.020 W/(m·K) | 0.6% | Above 35% | Complied with standards | High |
Through the above table, you can clearly see the application effect of DMCHA in different types of construction projects, providing a reference for the selection of building insulation materials.
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