Preparation of a Lightweight Heat-Insulating Carbon Matrix Composite Material
With the rapid advancements in high Mach number aircraft technology,the demand for enhanced ther-mal protective capabilities of insulation materials has become increasingly stringent.Specifically,the performance requirements of these materials,such as high temperature resistance,impact resilience,lightweight properties,and stability,have become more rigorous.A carbon foam-reinforced carbon aerogel composite material with outstanding thermal insulation performance was successfully prepared,using resorcinol and formaldehyde as raw materials.The fabrication process involved sol-gel in-situ growth,supercritical drying carbon dioxide technology and carboniza-tion.An advanced composite material comprising carbon aerogel,exhibiting remarkable thermal insulation proper-ties,has been developed.This material offers significant potential for applications in thermal management and insu-lation-demanding technologies.The effect of carbon aerogel on the thermal properties of composite material was studied.The results indicate that the pores of the coal-derived carbon foam are filled with carbon aerogel,and the introduction of carbon aerogel makes the composite have a lower thermal conductivity(0.078 W/(m·K))at low density(0.38 g/cm3),and the thermal properties has seen a 50％enhancement compared to the base carbon foam material,which can be used as a good thermal insulation material.
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