Low-thermal conductivity composite foam material and preparation method thereof

Abstract

The invention discloses a low-thermal conductivity composite foam material, which is prepared by the following steps: uniformly mixing resin, hollow microspheres, thermal expansion microspheres, a curing agent, an accelerant, a coupling agent, a toughening agent and a flame retardant in proportion, and filling a mold with the mixed slurry for molding and curing to obtain a resin-based foam matrix;and uniformly mixing a silicon source, ethanol, water and a catalyst to obtain silica sol, impregnating the resin-based foam matrix with the silica sol, and carrying out gelatinization treatment, aging and drying to obtain the low-thermal conductivity composite foam material. By adding the hollow microspheres, the problems that traditional aerogel is low in mechanical strength and poor in toughness are solved, the operability of the aerogel serving as a thermal insulation material in construction application is improved, and the mechanical properties of the aerogel material are greatly improved. The prepared low-thermal conductivity composite foam material has good heat insulation and sound insulation characteristics and mechanical properties, is simple in forming process and convenient to operate, and can be widely applied to the requirements of industries, buildings and aerospace for heat insulation and heat preservation components.

Description

Technical field [0001] The invention belongs to the technical field of foam material preparation, and specifically relates to a preparation method of a low thermal conductivity composite foam material. Background technique [0002] With the progress of society and economic development, the consumption of energy resources has increased substantially, and people’s awareness of energy conservation and environmental protection has increased. As a high-efficiency energy consumption reduction, thermal insulation materials have been paid more and more attention and are widely used. Used in industry, construction, aviation, aerospace and other fields. At present, thermal insulation materials mainly include: ceramic fiber cotton board, glass fiber cotton board, rock wool board, polystyrene foam board, foamed cement, new expanded perlite insulation system and polystyrene particle insulation slurry. With the further development of technology, thermal insulation material technology is devel...

AI Technical Summary

Problems solved by technology

However, due to the low mechanical strength and poor toughness of pure airgel, this leads to poor dimensional stability of airgel materials, which limits its operability and application in construction.