Method for improving the water tolerance of bio-based CNF-films
US10786829B2 · kind B2 · utility
0Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2015 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | Jun 15, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2301/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a continuous roll-to-roll process for improving the water tolerance of bio-based polymers, in particular cellulose nanofibrils (CNF) films. Furthermore, the invention provides a method, which combines surface modification/functionalization for improving water stability and wet strength, UV/Ozone treatment, corona treatment or plasma activation for purifying and activating the surface and thus increasing the reaction efficiency, and further hydrophobization of the surface of CNF film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.