Abstract
Abstract To overcome the interior brittleness of silica networks, polyvinylmethyldimethoxysilane reinforced methyltrimethoxysilane based silica aerogels (PRMSAs) were prepared via a facile strategy based on crosslinking polyvinylmethyldimethoxysilane with methyltrimethoxysilane in the sol-gel process and then drying in supercritical fluids. Benefiting from long-chain aliphatic hydrocarbons and abundant methyl groups, monolithic PRMSAs exhibit elastic recovery properties and super-high specific surface area, reaching up to 1479 ± 83 m2/g. As heat insulators, PRMSAs possess a low thermal conductivity of 0.029 W/(m·K) at ambient conditions. Our new method may greatly expand the usage of silica aerogels in thermal insulation applications.
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