【摘要】 采用稳态荧光和电导方法研究了系列季铵盐阳离子双子表面活性剂C12-S-C12·2Br(S代表亚甲基的个数)与水溶性高分子羟丙基纤维素(Hydroxypropyl cellulose,HPC)在水溶液中的相互作用。实验结果表明:在低于双子表面活性剂自身临界胶团浓度(Critical miceue concentration,cmc)时,在HPC分子上发生了聚集。当E12-S-C12·2Br/HPC体系混合溶液中C12-S-C12·2Br。的浓度达到c2(c2>cmc)时才有表面活性剂自由胶团生成。揭示了临界聚集浓度(Critical aggregation concentration,cac)和C12-S-C12·2Br/HPC体系混合溶液中自由胶团生成浓度c2与系列C12-S-C12·2Br表面活性剂cmc的比例关系及与链接链S的关联。更多还原

【Abstract】 Interactions between the series quaternary ammonium gemini surfactants (Ci2-S-C12.2Br) and hydroxypropyl cellulose (HPC) in aqueous solution were investigated by steady-state fluorescence as well as electrical conductivity experiments. The results showed that the presence of HPC induces the aggregation of C12-S-C12.2Br surfactants at concentrations lower than the critical micelle concentration of the surfactant itself. The critical aggregate concentration (cac) and the concentration at which free micelles form in HPC aqueous solutions have a good proportional relationship with the critical micelle concentration (cmc) for the C12-S-C12.2Br series gemini surfactants.更多还原