| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 612743 | Journal of Colloid and Interface Science | 2006 | 4 Pages |
Abstract
The surface modification of cellulose fibers with trifluoroacetic anhydride (TFAA) was studied using the heterogeneous cellulose/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.
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Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Ana G. Cunha, Carmen S.R. Freire, Armando J.D. Silvestre, Carlos Pascoal Neto, Alessandro Gandini,