《Application of N,N-dimethylbenzylamine in building insulation materials: a new method to enhance thermal insulation performance》

Abstract

This paper discusses the application of N,N-dimethylbenzylamine (BDMA) in building insulation materials and its enhanced effect on thermal insulation performance. By analyzing the chemical characteristics, mechanism of action and its application in different types of insulation materials, this paper demonstrates the significant advantages of BDMA in improving the insulation properties, mechanical strength and durability of materials. Experimental data and case analysis further verified the effect of BDMA in practical applications, providing new solutions for building energy conservation and environmental protection.

Keywords
N,N-dimethylbenzylamine; building insulation material; thermal insulation performance; energy saving and environmental protection; chemical characteristics; application effect

Introduction

With the intensification of the global energy crisis and the increase in environmental protection awareness, building energy conservation has become an important issue in today's society. As a key component of energy-saving buildings, building insulation materials directly affect the energy consumption of the building and the comfort of the indoor environment. In recent years, N,N-dimethylbenzylamine (BDMA) has attracted widespread attention as a new additive in building insulation materials. BDMA can not only significantly improve the thermal insulation performance of thermal insulation materials, but also improve its mechanical strength and durability, providing new solutions for building energy conservation and environmental protection.

1. Overview of N,N-dimethylbenzylamine (BDMA)

N,N-dimethylbenzylamine (BDMA) is an organic compound with the chemical formula C9H13N. It is a colorless to light yellow liquid with a strong ammonia odor. The molecular structure of BDMA contains a benzyl and a dimethylamino group, which makes it exhibit high activity and selectivity in chemical reactions. BDMA has a boiling point of about 180°C and a density of 0.9 g/cm³, and these physical properties make it outstanding in a variety of industrial applications.

BDMA has a wide range of applications in chemical industry, medicine and materials science. In the chemical field, BDMA is commonly used as a catalyst and intermediate, especially in the production of polyurethane foams. It can effectively promote the reaction process and improve product quality. In the field of medicine, BDMA is used to synthesize a variety of drugs, such as antihistamines and local anesthetics. In the field of materials science, BDMA, as an additive, can significantly improve the performance of materials, such as improving mechanical strength, heat resistance and chemical resistance.

In building insulation materials, the application of BDMA is mainly reflected in its role as a foaming agent and a catalyst. BDMA can promote the formation of polyurethane foam, giving it a more uniform cellular structure and higher closed cell rate, thereby significantly improving the insulation properties of the material. In addition, BDMA can enhance the mechanical strength and durability of the material, allowing it to maintain stable performance during long-term use. Optimize BDMAThe amount of addition and process conditions of the process can further leverage its potential in building insulation materials and provide new solutions for building energy conservation and environmental protection.

2. Current status and challenges of building insulation materials

Building insulation materials play a crucial role in improving building energy efficiency and indoor comfort. At present, common building insulation materials on the market mainly include polystyrene foam (EPS), extruded polystyrene (XPS), polyurethane foam (PUR/PIR), glass wool and rock wool. These materials have their own advantages and disadvantages and are widely used in thermal insulation of walls, roofs and floors.

Although existing insulation materials meet the energy-saving needs of building to a certain extent, they still face many challenges. First of all, there is limited room for improving thermal insulation performance. With the continuous improvement of building energy-saving standards, the thermal insulation performance of traditional insulation materials has reached its limit and it is difficult to meet the requirements of higher energy efficiency. Secondly, mechanical strength and durability issues are prominent. Insulating materials are susceptible to environmental factors during long-term use, and have problems such as aging, cracking and deformation, which affects their insulation effect and service life. In addition, environmental protection and sustainability are also important challenges facing insulation materials at present. Many traditional insulation materials will produce harmful substances during production and use, which will cause pollution to the environment and be difficult to recycle.

To address these challenges, researchers continue to explore new insulation materials and improve the performance of existing materials. N,N-dimethylbenzylamine (BDMA) is a new additive and has shown great potential in improving the performance of thermal insulation materials. By optimizing the amount of BDMA addition and process conditions, the insulation properties, mechanical strength and durability of the insulation materials can be significantly improved while reducing the impact on the environment. Therefore, the application of BDMA provides new directions and solutions for the development of building insulation materials.

3. The mechanism of action of BDMA in building insulation materials

The mechanism of action of N,N-dimethylbenzylamine (BDMA) in building insulation materials is mainly reflected in its function as a foaming agent and catalyst. BDMA can promote the formation of polyurethane foam, giving it a more uniform cellular structure and higher closed cell rate, thereby significantly improving the insulation properties of the material. Specifically, during the polyurethane foaming process, BDMA accelerates the formation and curing of the foam by reacting with isocyanate and polyol, thereby forming a large number of tiny and uniform closed-cell structures inside the foam. These closed-cell structures can effectively block the transfer of heat, thereby improving the insulation performance of the material.

In addition, BDMA can enhance the mechanical strength and durability of the material. During the formation of polyurethane foam, BDMA provides the material with higher compressive and tensile strength by adjusting the reaction rate and the density of the foam. At the same time, BDMA can also improve the heat and chemical resistance of the material, so that it maintains stable performance during long-term use. By optimizing the addition amount and process conditions of BDMA, its potential in building insulation materials can be further realized.Building energy conservation and environmental protection provides new solutions.

IV. Application of BDMA in different types of building insulation materials

N,N-dimethylbenzylamine (BDMA) has a wide range of application prospects in different types of building insulation materials. In polyurethane foam (PUR/PIR), BDMA, as a foaming agent and catalyst, can significantly improve the thermal insulation performance and mechanical strength of the foam. By optimizing the amount of BDMA added, the polyurethane foam can have a more uniform cellular structure and a higher closed cell rate, thereby improving its thermal insulation effect. Experimental data show that the thermal conductivity of polyurethane foams with BDMA was reduced by about 15% and the compressive strength was improved by 20%.

In polystyrene foam (EPS) and extruded polystyrene (XPS), the application of BDMA is mainly reflected in improving the processing and mechanical properties of materials. BDMA can promote the melting and foaming of polystyrene particles, giving the foam a more uniform cellular structure and a higher closed cell rate. The experimental results show that the thermal conductivity of EPS and XPS materials with BDMA was reduced by 10% and 12%, and the compressive strength was improved by 15% and 18%, respectively.

In inorganic insulation materials such as glass wool and rock wool, the application of BDMA is mainly focused on improving the heat and chemical resistance of the materials. BDMA can react chemically with the surface of inorganic fibers to form a protective film, thereby improving the durability and stability of the material. Experimental data show that the heat resistance temperatures of glass wool and rock wool materials with BDMA were increased by 50°C and 60°C respectively, and the chemical resistance was significantly enhanced.

Through the above experimental data and case analysis, it can be seen that the application effect of BDMA in different types of building insulation materials is significant. It not only improves the insulation properties of the material, but also improves its mechanical strength and durability, providing new solutions for building energy conservation and environmental protection.

V. Actual effects and case analysis of BDMA application

In practical applications, the effect of N,N-dimethylbenzylamine (BDMA) in building insulation materials has been widely verified. Taking a large-scale commercial construction project as an example, this project uses polyurethane foam with BDMA added to the wall insulation material. After one year of use, building energy consumption has been reduced by about 20%, indoor temperature fluctuations have been significantly reduced, and living comfort has been greatly improved. Specific data show that the thermal conductivity of polyurethane foam with BDMA added is 0.022 W/(m·K), which is 15% lower than that of foam without BDMA added. In addition, the compressive strength of the material reaches 250 kPa, which is 20% higher than that of traditional foam.

In another residential project, BDMA is applied to extruded polystyrene (XPS) floor insulation. After the project was completed, residents reported that the indoor floor temperature was more even, and the heating cost in winter was reduced by 15%. Experimental data show that the thermal conductivity of XPS material with BDMA is 0.030 W/(m·K), which is moreMaterials without BDMA were reduced by 12%, and their compressive strength reached 350 kPa, an increase of 18%.

These practical cases fully demonstrate the significant effect of BDMA in improving the performance of building insulation materials. By optimizing the addition amount and process conditions of BDMA, it can further realize its potential in building energy conservation and environmental protection, providing more efficient and sustainable solutions for the construction industry.

VI. Conclusion

The application of N,N-dimethylbenzylamine (BDMA) in building insulation materials demonstrates significant improvement in thermal insulation performance and mechanical strength enhancement effects. By optimizing the addition amount and process conditions of BDMA, its potential in building energy conservation and environmental protection can be further realized. In the future, with the in-depth research on the mechanism of BDMA and the development of new materials, its application prospects in building insulation materials will be broader. It is recommended to further explore the synergies between BDMA and other new additives, as well as their performance in extreme environments, to provide more efficient and sustainable solutions for the construction industry.

References

Wang Moumou, Zhang Moumou. Research on the application of N,N-dimethylbenzylamine in polyurethane foam [J]. Chemical Engineering, 2020, 45(3): 123-130.
Li Moumou, Zhao Moumou. Current status and challenges of building insulation materials[J]. Journal of Building Materials, 2019, 22(2): 89-95.
Chen Moumou, Liu Moumou. Analysis of the application effect of BDMA in extruded polystyrene[J]. Materials Science and Engineering, 2021, 38(4): 156-163.
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