壳聚糖接枝PDMAEMA共聚物的聚集行为

Surface Activity and Aggregation Behaviours of Chitosan-g-PDMAEMA Copolymers

壳聚糖接枝甲基丙烯酸-2-(N,N-二甲氨基)乙酯共聚物(Chitosan-g-PDMAEMA)是一种具有生物基团的阳离子型聚电解质。文中采用表面张力法、稳态荧光探针法和电导率法研究了该接枝共聚物在水溶液中的聚集行为。研究结果表明,与壳聚糖水溶液相比,接枝共聚物水溶液具有更好的表面活性,属于一类结构特殊的阳离子型大分子表面活性剂。

Chitosan-g-PDMAEMA graft eopolymers have been suceessfully synthesized and their aggregation behaviours in aqueous solution were investigated by the measurements of surface tension, steady-state fluorescence probe and eonduetivity. It shows that the aqueous solutions of these graft eopolyrners possess relatively good surfaee activity. This kind of modified ehitosan is a new eationie surfaetant with special structure and will be found the potential use in biomedical field.