Reversible hydrophobization and lipophobization of cellulose fibers via trifluoroacetylation

被引：38

作者：

Cunha, Ana G.

Freire, Carmen S. R. ^{[1
]}

Silvestre, Armando J. D.

Neto, Carlos Pascoal

Gandini, Alessandro

机构：

[1] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2006年 / 301卷 / 01期

关键词：

cellulose fibers; surface modification; trifluoroacetic anhydride; esterification; reversible hydrophobization and lipophobization; neutral hydrolysis;

D O I：

10.1016/j.jcis.2006.04.078

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：333 / 336

页数：4

共 19 条

[1] The surface modification of cellulose fibres for use as reinforcing elements in composite materials [J].