Ultra-light high-resilience low-thermal-conductivity composite foam material and preparation method thereof

Abstract

The invention discloses an ultra-light high-resilience low-thermal-conductivity composite foam material and a preparation method thereof. The preparation method comprises the following steps of: (1) mixing thermoplastic elastomer particles, a low-thermal-conductivity material and flame retardant, and performing synthesis and granulation to obtain to-be-foamed composite particles; (2) placing the to-be-foamed composite particles in a high pressure reaction kettle, introducing carbon dioxide gas into the high pressure reaction kettle, regulating the pressure and temperature of the high pressurereaction kettle so as to make the carbon dioxide in a supercritical state, performing pressure maintaining and penetration, releasing the pressure rapidly, and performing heating and foaming to prepare composite foamed particles; and (3) performing compression molding on the omposite foamed particles through steam so as to prepare the ultra-light high-resilience low-thermal-conductivity compositefoam material. The composite foam material has the characteristics of low density, high elastic resilience, strong mechanical strength, flame retardancy, low thermal conductivity and the like, and thecomposite foam material can be widely applied to buildings and industrial equipment and fields which have special requirements for mechanical properties, resilience and flame retardancy of materials.

Description

technical field [0001] The invention relates to the field of polymer composite material foaming, in particular to an ultra-light composite foaming material with high resilience and low thermal conductivity and a preparation method thereof. Background technique [0002] The traditional thermal insulation materials with low thermal conductivity are mainly to increase the gas phase gap ratio and reduce the thermal conductivity and conductivity. In order to improve convective heat transfer and radiation heat transfer in the use environment, fiber-based thermal insulation materials must have a thicker coating. Profile-type inorganic thermal insulation materials need to be assembled and constructed, and have defects such as many seams, loss of appearance, poor waterproofness, and short service life. For this reason, people have been seeking and researching a new type of material that can improve the thermal insulation performance of the material. [0003] The low thermal conduct...

AI Technical Summary

Problems solved by technology

The ultra-light, high-resilience and low-thermal-conductivity composite foaming material of the present invention uses supercritical carbon dioxide as a foaming agent, and prepares composite particles prepared by blending and granulation through purely physical foaming and intermittent pressure relief and heating methods. Foamed particles are prepared by steam molding, and the production process is simple, environmentally friendly and pollution-free; the ultra-light, high-resilience and low-thermal-conductivity composite foam material of the present invention has low density, high resilience, strong mechanical properties, flame retardancy and heat conduction Low thermal coefficient and other characteristics, and because the composite foam material has a porous structure and contains a large amount of carbon dioxide gas inside, the thermal insulation and flame retardant properties of the material are greatly improved; the composite foam with ultra-light, high resilience and low thermal conductivity of the present invention The material solves the problems of poor mechanical properties, low resilience and easy combustion of traditional thermal insulation materials. It can be widely used in construction, industrial equipment and some fields that have special requirements for mechanical properties, resilience and flame retardancy of materials.

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