壳聚糖改性—两性离子高分子表面活性剂的制备

摘要

A novel water-soluble zwitterionic surfactant ( Rm,n-CTS-B ) was synthesized by chitosan (CTS) as a raw material, and the hydrophilic and hydrophobic groups were introduced into the active amino groups of chitosan by Schiff reaction and alkylation. The molecular structures of chitosan and its derivatives were characterized by IR and 1H-NMR. The degree of substitution was determined by ele-mental analysis (EA) , and the optimal reaction conditions were determined by orthogonal experiment. The water solubility, surface tension and foam properties of Rm,n-CTS-B were studied. The results show that the synthesized R8,2-CTS-B has good surface properties, the surface tension can reach 31.13 mN/m.%以壳聚糖(CTS)为原料,通过Schiff反应以及烷基化反应在壳聚糖的活性氨基上先后引入亲水和疏水基团,合成了一种易溶于水的两性离子表面活性剂( Rm,n-CTS-B).采用红外光谱( IR)、核磁共振( 1 H-NMR)等方法对壳聚糖及其衍生物的分子结构进行表征;通过元素分析(EA)测定其取代度,采用正交实验确定其最优反应条件.对Rm,n-CTS-B的水溶性、表面张力以及泡沫性能进行了研究,结果表明:合成的R8,2-CTS-B具有良好的表面性能,表面张力能达到31.13 mN/m.