公开(公告)号：WO1993006044A1

公开(公告)日：1993-04-01

申请号：PCT/US1992007838

申请日：1992-09-16

Applicant: BATTELLE MEMORIAL INSTITUTE

Inventor： BATTELLE MEMORIAL INSTITUTE ,  RAMAMURTHI, Sangeeta, D. ,  RAMAMURTHI, Mukund

IPC: C01B33/16

CPC classification number: C01B33/1585 ,  C04B38/0045 ,  Y10T428/249924 ,  Y10T442/2033 ,  Y10T442/2926

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 an aerogel precursor; mixing fibers with the precursor; aging the precursor 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 DEG C per hour to about 500 DEG 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 (3.43 MPa) per hour, and maintaining temperature above at least the critical temperature until the critical pressure transition is passed.

Abstract translation: 分散在本体气凝胶内的散装气凝胶和纤维的气凝胶基体复合材料，以及制备气凝胶基体复合材料的方法，其步骤为：制备气凝胶前体; 将纤维与前体混合; 老化含有纤维的前体以获得凝胶组合物; 将凝胶状组合物完全浸没在适于超临界干燥的液体中; 以每小时约75℃至约500℃的速率加热和加压凝胶组合物，直到至少达到凝胶组合物中的主要液体的临界温度和压力; 保持至少临界温度和压力足以将液体转化为超临界流体的时间; 并通过以每小时高于500psi（3.43MPa）的速率降低压力并将温度保持在至少临界温度直到临界压力转变通过为止，将压力和温度降低到环境条件。