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Title: Preparation of highly hydrophobic and lipophobic cellulose fibers by a straightforward gas-solid reaction
Author: Cunha, Ana Gisela
Freire, Carmen
Silvestre, Armando
Neto, Carlos Pascoal
Gandini, Alessandro
Belgacem, M. Naceur
Chaussy, Didier
Beneventi, Davide
Keywords: Cellulose fibers
Gas–solid reaction
Green process
Issue Date: 2010
Publisher: Elsevier
Abstract: This work describes a very simple, rapid, and efficient approach to the hydrophobization and lipophobization of cellulose fibers through their reaction with gaseous trichloromethylsilane (TCMS). The characterization of the modified surface involved FTIR-ATR and solid-state (29)Si NMR spectroscopy, scanning electron microscopy (SEM), and contact angle measurements with different liquids. The modification generated an inorganic coating around the fibers, associated with the construction of a three-dimensional network of Si-O-Si bridges partly bound to the polysaccharide macromolecules. This coating conferred both a high hydrophobicity and a lipophobicity to the samples even when the treatments applied modest TCMS quantities and reaction times as short as 30 s. The green connotation of this novel process constitutes an additional positive feature. (C) 2010 Elsevier Inc. All rights reserved.
Peer review: yes
DOI: 10.1016/j.jcis.2009.12.057
ISSN: 0021-9797
Appears in Collections:DQ - Artigos

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