Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 344, Issue 2, Pages 588-595Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2009.12.057
Keywords
Cellulose fibers; Trichloromethylsilane; Gas-solid reaction; Hydrophobicity; Lipophobicity; Green process
Categories
Funding
- FCT (Fundacao para a Ciencia e a Tecnologia) [SFRH/BD/31134/2006]
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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 Si-29 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.
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