The Aggregation Behavior and Formation of Nanoparticles of Oleoylchitosan in Dilute Aqueous Solution

被引:0
作者
LI Yanyan CHEN Xiguang SUN Gangzheng and XING Ke College of Marine Life Sciences Ocean University of China Qingdao P R China [266003 ]
机构
关键词
O-chitosan; viscosity; surface tension; fluorescence; nanoparticles;
D O I
暂无
中图分类号
P734 [海洋化学];
学科分类号
070702 ;
摘要
Oleoylchitosans (O-chitosans) with different degrees of substitution (DS) were synthesized by reacting chitosan with oleoyl chloride. The chemical structures of the products were characterized by 1H NMR and FT-IR. These results suggested the for- mation of an amide linkage between the amino groups of chitosan and the carboxyl groups of oleic acid. The viscosity of O-chitosan sharply increased with the increase of concentration, whereas that of unmodified chitosan rose only slightly. This increase became larger as the DS increased. All of the O-chitosans could reduce surface tension slightly. The critical aggregation concentration (CAC) of O-chitosans with DS 5%, 11%, and 27% were 79.43 mgL-1, 31.6 mgL-1, and 10 mgL-1, respectively. Nanoparticles were prepared using an O/W emulsification method. The mean diameters of the polymeric amphiphilic nanoparticles of O-chitosans with DS 5% and 11% were around 327.4 nm and 275.3 nm, respectively.
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页码:199 / 204
页数:6
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