期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 102, 期 2, 页码 1968-1973出版社
JOHN WILEY & SONS INC
DOI: 10.1002/app.24485
关键词
oleoyl-chitosan; solution properties; fluorescence; surface tension; self-aggregation
Oleoyl-chitosans (O-chitosans), with three degrees of substitution (DS), were synthesized by reacting chitosan with oleoyl chloride. The chemical structures of these polymers were characterized by H-1 NMR and FTIR. The results suggested the formation of an amide linkage between amino groups of chitosan and carboxyl groups of oleic acid. These O-chitosans exhibited poor solubility in aqueous acidic solution. The solubility of C-chitosans decreased as the DS values increased. The transmittance of O-chitosans (2 g/L) with DS 5%, 11%, 27% in 1% (v/v) HCl solution were 69.5%, 62.7%, 48.6%, respectively. These O-chitosans were not soluble at neutral or alkali pH. Formation of self-aggregation was observed using pyrene as a fluorescent probe in the O-chitosans aqueous solution. The increase of DS of O-chitosans resulted in significant decrease of critical aggregation concentration (CAC). The CAC of the C-chitosans with DS 5%, 11%, 27% were 79.43, 31.6, 10 mg/L, respectively. The surface tension of solution could be reduced slightly by all of the O-chitosans. The surface tension of O-chitosans solution decreased with the increase of DS values. (c) 2006 Wiley Periodicals, Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据