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US 12,269,935 B2Granted
Nanocellulose aerogels and foams
AssigneeThe Regents of the University of California
InventorsYou-Lo Hsieh, Feng Jiang
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Abstract
The present disclosure provides a method for preparing an aerogel or a foam, the method comprising: forming a reaction mixture comprising a cellulose nanofibril gel, a first solvent, and one or more crosslinking agents under conditions sufficient to crosslink the gel; and contacting the crosslinked gel with a second solvent under conditions sufficient to dry the crosslinked gel, thereby forming an aerogel or foam.
Claims9
A method for preparing an aerogel or a foam, the method comprising:
- (a) freezing an aqueous suspension comprising cellulose nanofibrils, cellulose sub-micron fibers, or a combination thereof,
- (b) freeze-drying the frozen suspension, thereby forming an aerogel or foam;
- and at least one of the following:
- (c1) contacting the aerogel or foam with an organosilane under conditions sufficient to deposit the organosilane onto the aerogel or foam;
- or
- (c2) heating the aerogel or foam under conditions sufficient to carbonize the aerogel or foam.
3 more elements
Dependencies are inferred from the claim text.