Low-dielectric and low-thermalconductivity aerogel composites and preparation method thereof

Abstract

The aerogel molecules mixed with aqueous solution containing a trace amount of alcohols solvent is dispersed by mixer to form an aerogel suspension dispersion solution containing a trace amount of alcohols, which can be uniformly aerogel/fiber blankets composites with mixed various types of fibrous blankets or fibrous mats, and then drying and solvent recovery to form a low-cost, low-medium electrical aerogel/fiber insulation blanket, the steps of which comprises mixed hydrolysis, suspension dispersion condensation solution, immersion composite molding, and drying and solvent recovery. This technology does not add a large amount of hydrophobic organic solvents and surfactants, and in the suspension dispersion condensation using a large amount of aqueous solution, that contained a trace amount of alcohols solvent, combined with emulsifier for suspension dispersion the hydrophobic or hydrophilic-hydrophobic complex aerogel dispersion solution, that combine aerogel dispersion solution with various types of fibrous blankets or fibrous mats by dipping and spraying, moreover, the aerogel composites drying and solvent recycling through atmospheric pressure drying technology.