Aerogel matrix composites

Abstract

An aerogel matrix composite of a bulk aerogel and fibers dispersed within the bulk aerogel, and a method for preparing the aerogel matrix composite having the steps: Making a first solution by mixing a metal alkoxide with an alcohol; making a second solution by mixing an alcohol, water, and base; mixing the first and second solutions to form a third solution and mixing fibers therewith; aging the third solution containing the fibers to obtain a gelled composition; completely submerging the gelled composition in a liquid suitable for supercritical drying; heating and pressurizing the gelled composition at a rate between about 75.degree. C. per hour to about 500.degree. C. per hour until at least the critical temperature and pressure of at least the major liquid in the gel composition are reached; maintaining at least the critical temperature and pressure for a time sufficient to transform the liquid to a supercritical fluid; and reducing the pressure and temperature to ambient conditions by reducing the pressure at a rate above 500 psi per hour, and maintaining temperature above at least the critical temperature until the critical pressure transition is passed.

Dependencies are inferred from the claim text.