authors |
Freire, CSR; Silvestre, AJD; Neto, CP; Gandini, A; Fardim, P; Holmbom, B |
nationality |
International |
journal |
JOURNAL OF COLLOID AND INTERFACE SCIENCE |
author keywords |
cellulose fibers; fatty acids; surface and in-depth esterification; surface characterization; XPS; contact angle; ToF-SIMS |
keywords |
RAY PHOTOELECTRON-SPECTROSCOPY; MECHANICAL PULP FINES; FTIR; ECF |
abstract |
The topochemistry of the controlled heterogeneous esterification of cellulose fibers with fatty acid chlorides of different chain length, both in swelling and non-swelling media, was assessed by X-ray Photoelectron Spectroscopy (XPS), Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) and contact angle measurements. On the one hand, the results provided by the combined use of these three powerful techniques showed unambiguously the occurrence of the reaction at the fibers' surface and, on the other hand, the XPS results showed that the surface coverage with the fatty acid moieties increased with their chain length, but was only modestly affected by the degree of substitution (DS), suggesting that when the esterification yield was increased (higher DS values), an in-depth reaction also occurred, particularly when DMF was used as a cellulose swelling medium, involving the OH groups buried below the fibers' surface. (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 |
205 |
ending page |
209 |
digital object identifier (doi) |
10.1016/j.jcis.2006.04.074 |
web of science category |
Chemistry, Physical |
subject category |
Chemistry |
unique article identifier |
WOS:000239538300024
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
7.489 |
5 year journal impact factor |
6.171 |
category normalized journal impact factor percentile |
80.818 |
dimensions (citation analysis):
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altmetrics (social interaction):
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