Back to results
US 2025/0282937 A1Published application
Biodegradable composites for packaging
AssigneesMars, Incorporated, Georgia Tech Research Corporation
InventorsEric H. KLINGENBERG, James Carson MEREDITH III, Natalie STINGELIN, Yang LU
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to renewable composites as high oxygen and high moisture barriers for packaging. In certain embodiments, the renewable composite comprises cellulose nanocrystals (CNC) and chitin (Ch). In other embodiments, the renewable composite comprises CNC. Ch. and one or more cross-linkers.
Claims20
A biodegradable composite comprising:
- cellulose nanocrystals (CNC) and chitin (Ch),
- wherein the Ch having a degree of acetylation (DA) from about 40% to about 95%, and
- wherein, at 23° C., 50% relative humidity (RH), the biodegradable composite having an oxygen permeability equal to or lower than about 4 cm3 μm m−2 d−1 kPa−1 and a water vapor transmission rate (WVTR) equal to or lower than about 18 g mm m−2 d−1.
A method for producing a biodegradable composite, the method comprising:
- forming a cellulose nanocrystal (CNC) suspension;
- preparing chitin (Ch) powder from deacetylation of chitin powder;
- forming a Ch liquid mixture;
- mixing the CNC suspension and the Ch liquid mixture to form a mixture suspension;
- coating the mixture suspension on a substrate;
- and
- air-drying the mixture suspension to obtain a CNC/Ch composite film.
4 more elements
A method for producing a biodegradable composite, the method comprising:
- forming a cellulose nanocrystal (CNC) aqueous suspension;
- preparing soluble chitin (Ch) powder from deacetylation of chitin powder;
- forming a Ch solution;
- mixing the CNC aqueous suspension, the Ch solution, and one or more cross-linkers to form a mixture suspension;
- coating the mixture suspension on a substrate;
- air-drying the mixture suspension;
- and
- heat-drying the mixture to obtain a CNC/Ch/cross-linker composite film.
5 more elements
Dependencies are inferred from the claim text.