Coaxial cellulose-based aerogel fibers
US-2021156051-A1 · May 27, 2021 · US
Nanocellulose aerogels and foams
US11248107B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11248107-B2 |
| Application number | US-201916362297-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 22, 2019 |
| Priority date | Mar 29, 2018 |
| Publication date | Feb 15, 2022 |
| Grant date | Feb 15, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for preparing an aerogel or a foam, the method comprising: (a) 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, wherein the one or more crosslinking agents comprise one or more coated polymers, wherein the one or more coated polymers comprise cellulose acetate; and (b) contacting the crosslinked gel with a second solvent under conditions sufficient to dry the crosslinked gel, thereby forming an aerogel or foam. 2. The method of claim 1 , wherein the reaction mixture further comprises an acid and the conditions further comprise conditions sufficient to protonate the gel. 3. The method of claim 2 , wherein the acid comprises hydrochloric acid. 4. The method of claim 1 , wherein the first solvent comprises acetone, ethanol, dimethyl sulfoxide, dimethylformamide, toluene, chloroform, or a combination thereof. 5. The method of claim 1 , wherein the crosslinked gel is washed with the first solvent following the crosslinking step. 6. The method of claim 1 , wherein the second solvent comprises tert-butanol, hexane, or a combination thereof. 7. The method of claim 1 , wherein drying the crosslinked gel comprises freeze-drying at a temperature of about −50° C. at a pressure of about 0.05 mbar. 8. The method of claim 1 , wherein drying the crosslinked gel comprises air drying at a temperature of at least about 20° C. 9. An aerogel or foam prepared by the method of claim 1 .
Assignees
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Classifications
Energy storage using capacitors · CPC title
characterised by their structure, e.g. multi-layered, porosity or surface features · CPC title
Manufacture or treatment of nanostructures · CPC title
specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title
Crosslinking of cellulose derivatives · CPC title
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Frequently asked questions
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- What does patent US11248107B2 cover?
- 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…
- Who is the assignee on this patent?
- Univ California
- What technology area does this patent fall under?
- Primary CPC classification C08L1/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 15 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).