	US 11,913,164 B2
	Modified cellulosic compositions having increased hydrophobicity and processes for their production
Anil N. Netravali, Ithaca, NY (US); Yidong Zhong, Pembroke Pines, FL (US); and Namrata V. Patil, Sunnyvale, CA (US)
Assigned to CORNELL UNIVERSITY, Ithaca, NY (US)
Filed by CORNELL UNIVERSITY, Ithaca, NY (US)
Filed on May 9, 2022, as Appl. No. 17/739,970.
Application 17/739,970 is a division of application No. 15/832,725, filed on Dec. 5, 2017, granted, now 11,326,303.
Application 15/832,725 is a continuation in part of application No. PCT/US2016/036098, filed on Jun. 6, 2016.
Claims priority of provisional application 62/171,371, filed on Jun. 5, 2015.
Prior Publication US 2022/0364301 A1, Nov. 17, 2022
Int. Cl. D06M 13/513 (2006.01); D06M 13/325 (2006.01); D06M 13/184 (2006.01); D06M 11/79 (2006.01); C08B 15/05 (2006.01); C08B 15/10 (2006.01); D06M 13/188 (2006.01); D06M 10/00 (2006.01); D06M 10/08 (2006.01); D06M 101/06 (2006.01)

CPC D06M 13/513 (2013.01) [C08B 15/05 (2013.01); C08B 15/10 (2013.01); D06M 11/79 (2013.01); D06M 13/184 (2013.01); D06M 13/188 (2013.01); D06M 13/325 (2013.01); D06M 10/003 (2013.01); D06M 10/08 (2013.01); D06M 2101/06 (2013.01); D06M 2200/12 (2013.01); D06M 2400/01 (2013.01)]

17 Claims

1. A process for increasing hydrophobicity of a cellulosic surface, said process comprising:

providing a cellulosic surface comprising cellulose fibers; and

grafting a plurality of aliphatic fatty acid molecules onto the cellulosic surface to yield a modified cellulosic surface having increased hydrophobicity,

wherein said grafting comprises reacting fatty anhydride with hydroxyl groups of the cellulose fibers in order to covalently bond the aliphatic fatty acid molecules to the cellulose fibers, and

wherein said grafting takes place without using any toxic reagents or without exogenous solvents.