US 11,807,727 B2
Transparent and homogenous cellulose nanocrystal-lignin UV protection films
Zhihua Jiang, Auburn, AL (US); and Mahesh Parit, Auburn, AL (US)
Assigned to AUBURN UNIVERSITY, Auburn, AL (US)
Filed by Auburn University, Auburn, AL (US)
Filed on Sep. 30, 2020, as Appl. No. 17/038,558.
Application 17/038,558 is a continuation of application No. 16/358,921, filed on Mar. 20, 2019, granted, now 10,829,602.
Claims priority of provisional application 62/645,581, filed on Mar. 20, 2018.
Prior Publication US 2021/0017345 A1, Jan. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 5/18 (2006.01); B01J 19/12 (2006.01); C08L 1/08 (2006.01); C08B 15/04 (2006.01); D21H 21/48 (2006.01); G02B 5/22 (2006.01); G02B 5/20 (2006.01); C08H 7/00 (2011.01); C08L 1/04 (2006.01); B82Y 30/00 (2011.01)
CPC C08J 5/18 (2013.01) [B01J 19/123 (2013.01); C08B 15/04 (2013.01); C08H 6/00 (2013.01); C08L 1/04 (2013.01); C08L 1/08 (2013.01); D21H 21/48 (2013.01); G02B 5/208 (2013.01); G02B 5/223 (2013.01); B82Y 30/00 (2013.01); C08J 2301/02 (2013.01); C08J 2497/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of making a visibly transparent, UV-blocking film, the method comprising:
(a) dispersing cellulose nanocrystals in an aqueous, alkaline solution to yield a dispersion;
(b) casting the dispersion of step (a) onto a substrate; and then
(b) evaporating the aqueous, alkaline solution for a time and at a temperature to yield a homogeneous, visibly transparent film.