화학공학소재연구정보센터
Journal of Colloid and Interface Science, Vol.301, No.1, 333-336, 2006
Reversible hydrophobization and lipophobization of cellulose fibers via trifluoroacetylation
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.