Reversible hydrophobization and lipophobization of cellulose fibers via trifluoroacetylation
authors Cunha, AG; Freire, CSR; Silvestre, AJD; Neto, CP; Gandini, A
nationality International
journal JOURNAL OF COLLOID AND INTERFACE SCIENCE
author keywords cellulose fibers; surface modification; trifluoroacetic anhydride; esterification; reversible hydrophobization and lipophobization; neutral hydrolysis
keywords COMPOSITE-MATERIALS; ESTERS; DERIVATIVES; PAPER
abstract The surface modification of cellulose fibers with trifluoroacetic anhydride (TFAA) was studied using the heterogeneous cell ulose/TFAA/pyridine/toluene system. The degree of substitution (DS) of the ensuing trifluoroacetylated fibers ranged from 0.04 to 0.30. This treatment conferred a high degree of both hydrophobicity and lipophobicity on the fibers' surface, even at low DS values. Both the dispersive and the polar contributions to the surface energy were drastically reduced. However, the original cellulose hydrophilicity could be readily restored through hydrolysis, by treating the modified fibers with neutral water. (c) 2006 Elsevier Inc. All rights reserved.
publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
issn 0021-9797
year published 2006
volume 301
issue 1
beginning page 333
ending page 336
digital object identifier (doi) 10.1016/j.jcis.2006.04.078
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000239538300040
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journal analysis (jcr 2019):
journal impact factor 7.489
5 year journal impact factor 6.171
category normalized journal impact factor percentile 80.818
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