	US 11,970,820 B2
	Cotton recycling
Jonathan Y. Chen, Austin, TX (US)
Assigned to BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, Austin, TX (US)
Filed by BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, Austin, TX (US)
Filed on Nov. 7, 2022, as Appl. No. 17/981,769.
Application 17/981,769 is a division of application No. 16/307,311, granted, now 11,525,214, previously published as PCT/US2017/036695, filed on Jun. 9, 2017.
Claims priority of provisional application 62/347,819, filed on Jun. 9, 2016.
Prior Publication US 2023/0062813 A1, Mar. 2, 2023
Int. Cl. D21H 11/20 (2006.01); A61L 15/28 (2006.01); C08B 16/00 (2006.01); C08L 1/02 (2006.01); D01G 11/00 (2006.01); D21H 11/12 (2006.01); D21H 11/16 (2006.01); D21H 27/00 (2006.01); B82Y 5/00 (2011.01); B82Y 30/00 (2011.01)

CPC D21H 11/20 (2013.01) [A61L 15/28 (2013.01); C08B 16/00 (2013.01); C08L 1/02 (2013.01); D01G 11/00 (2013.01); D21H 11/12 (2013.01); D21H 11/16 (2013.01); D21H 27/00 (2013.01); B82Y 5/00 (2013.01); B82Y 30/00 (2013.01); C08L 2207/20 (2013.01); D10B 2201/02 (2013.01)]

14 Claims

1. A method of making a cellulose product, the method comprising:

contacting a cotton fabric with an oxidizing system to obtain an oxidized cotton material, wherein the cotton fabric is derived from a post-consumer cotton waste and the oxidizing system comprises an N-oxyl compound;

processing the oxidized cotton material to form a cellulose material; and

dissolving or suspending an active ingredient in the cellulose material to form the cellulose product;

wherein the active ingredient comprises an inorganic particle having moisture barrier properties, oxidation barrier properties, or a combination thereof;

wherein the inorganic particle comprises a silicon oxide nanoparticle, a cerium oxide nanoparticle, or a combination thereof; and

wherein the active ingredient is present in an amount of from 0.01% to 20% by weight, based on the weight of the cellulose product.