Preparation of Micron-thick RF Aerogel Films under Conventional Drying
常压干燥制备微米级厚度RF气凝胶薄膜

Organic aerogel films were prepared with resorcinol and formaldehyde (RF) by combining solgel and spin-coating methods. By controlling solution composition and surrounding conditions, the RF aerogel films with the thickness of micron-scale were successfully produced under conventional drying instead of supercritical drying. The SEM pictures show that the films have the similar network structure to the bulk products. The effects of spin-coating and conventional drying processes on the final films were analysed, the results indicate that enlargement of the pore size and opitimization of the aging method of the films are the most important measures to realize conventional drying.