Fabrication of aerogels and aerogel composites by ambient pressure sublimation of frozen solvents
US12291621B2 · kind B2 · utility
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Key dates
| Filing date | Jun 25, 2020 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | May 28, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2383/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.