Three-dimensionally connected silica sphere-resin composite and method for production thereof

摘要

A method for preparing a three dimensionally connected silica spheres-resin composite, which comprises hydrolyzing and polymerizing a low molecular weight polyalkoxysilane in the presence of an acid catalyst in a mixed solution of the low molecular weight polyalkoxysilane and a water-soluble polymer in a solvent mixture of water and alcohol to obtain a three dimensional connected silica spheres, impregnating the three dimensional connected silica spheres with at least one material selected from resin-forming monomers and resin-forming prepolymers, and curing the material. The composite obtained by the above method retains its strength even at high temperatures where the organic matter undergoes pyrolysis or burnout.