COST-EFFECTIVE SYNTHESIS OF SILICA AEROGELS FROM WATERGLASS/TEOS BY AMBIENT DRYING AND THEIR APPLICATIONS

摘要

Cost-effective ambient drying processes for synthesizing silica aerogels from waterglass/TEOS have been developed. The waterglass-based process was applied to produce aerogel-PVB composites for the thermal insulation. The aerogels were obtained by solvent exchange/surface modification of wet gels using IPA/TMCS-Hexane solution. The aerogel-PVB composites were fabricated by hot pressing. The aerogel-smart glazing could be manufactured from wet gel films dip/spin-coated with the silica sol prepared via TEOS-based processing. The thermal conductivities of aerogel products will be discussed.