Redispersible dried nanocrystalline cellulose
US8758496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2009 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Jan 31, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B15/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Dried forms of nanocrystalline cellulose (NCC) with controllable redispersibility in water are provided; lightweight and easily transportable dried acid-form nanocrystalline cellulose which can be resuspended for use in a desired application can be produced by maintaining the humidity content of the NCC within a specific, low, range; evaporated acid-form NCC suspensions with moisture contents below this range are non-dispersible and therefore can be subsequently fixed in permanently dried form; the second form is produced by exchanging the proton of the acid-form NCC for neutral monovalent counterions and freeze-drying the NCC to give a solid product which rapidly disperses when placed in water; properties similar to those of the original suspension are also obtained with a brief sonication treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.