一种新型疏水改性的两亲性壳聚糖衍生物的表面活性研究

鉴于甲壳质的生物降解性、生物活性和生物相容性等诸多特性 ,其开发利用正受到人们的广泛重视[1] .具有不同性能和功效的衍生物已在医药、食品、日用化工、纺织、水处理等领域发挥了重要的作用 [2～ 4 ] .然而具有表面活性的两亲性衍生物却少见报道 [5,6] .本文将羧甲基壳聚糖进行疏水改性 ,使其分子上同时具有亲水基和疏水基 ,从而具有两亲性质 ,可以降低溶液的表面张力 ,并在溶液中形成胶束 .可望在日用化工、医药、食品等领域起到降低表面张力、增稠、乳化和增溶等作用 .1　实验部分1 .1　原料及仪器　羧甲基壳聚糖 (CMCHS,青岛生化制…

Studies on the Surface Activity Properties of A New Type of Amphiphilic Chitosan Derivative

A new type of amphiphilic derivative of carboxymethylchitosan(CMCHS) was prepared by reaction of CMCHS with p-nonylphenyl glycidyl ether. The structure of the resulting derivatives, i.e., (2-hydroxyl-3-p-nonylphenoxy) propyl-carboxy-methylchitosan(HNP-CMCHS) had been identified by UV and IR spectroscopy. They are water-soluble and have surface activity, which is related to the degree of substitution and the added electrolyte in the solution. In the presence of NaCl, two transitions appeared on the surface tension-concentration plots, that means the possibility of the formation of intramolecular micelle. It was also found that it need a long time for the surface tension of the derivative solutions to get a equilibrium value and the time is related to the derivative concentration, degree of substitution and added electrolyte of the solution.