公开(公告)号：US12291621B2

公开(公告)日：2025-05-06

申请号：US17621278

申请日：2020-06-25

Applicant: VIRGINIA COMMONWEALTH UNIVERSITY

Inventor： Massimo Bertino ,  Tyler Selden

IPC: C08J9/28

Abstract: Drying polar solvents which do not form hydrogen bonds with a wet gel or aerogel, or eutectics or solvent mixtures with the drying solvents, are utilized in a solvent exchange with wet gels used in the formation of aerogels. Preferably the drying solvents are non-polar solvents. The drying solvent or solvent mixtures results in profoundly less shrinkage, thereby allowing for the production of aerogels of preferred materials properties.

公开(公告)号：US11654409B2

公开(公告)日：2023-05-23

申请号：US16939769

申请日：2020-07-27

Applicant: VIRGINIA COMMONWEALTH UNIVERSITY ,  QATAR FOUNDATION FOR EDUCATION, SCIENCE AND COMMUNITY DEVELOPMENT

Inventor： Massimo Bertino ,  Lauren White ,  Dalton Echard ,  Tyler Selden

IPC: B01J13/00 ,  C08J3/075 ,  C01B33/158 ,  C08G77/388

CPC classification number: B01J13/0091 ,  C01B33/1585 ,  C08G77/388 ,  C08J3/075 ,  C01P2006/60 ,  C08J2205/026 ,  C08J2333/02 ,  C08J2383/04 ,  C08J2383/08

Abstract: A method of synthesizing aerogels and cross-linked aerogels are described that incorporate freeze-drying in lieu of super-critical solvent drying. Advantages over supercritical drying include a reduction in hazard risks posed by drying at supercritical conditions as well as the ability to up-scale the process to accommodate large pieces of material without introducing risk. In addition, inexpensive and more sophisticated mold technologies, which are not impervious to super-critical conditions, can be used to produce aerogel materials according to the freeze-drying method of the invention. This introduces a level of freedom never before available for the production of aerogel components.