两亲性表面活性剂(Gemini)是通过一个联接基团将两个传统表面活性剂分子在其亲水头基处连接在一起而形成的一类新型表面活性剂.构建了表面活性剂分子球簧结构模型,采用耗散粒子动力学方法(DPD),研究了表面活性剂在水溶液中的自组装行为,考察了添加剂醇分子对表面活性剂自组装结构以及临界胶束浓度(CMC)的影响.结果表明随着表面活性剂分子浓度的增加,其水溶液中依次出现球状、蠕虫状以及层状胶束等自组装结构;添加醇分子可提高表面活性剂疏水基团在溶液中的溶解性从而增大表面活性剂溶液的CMC,具有抑制胶束生成的作用.
As a new kind of surfactant, amphipathic molecule Gemini is composed by two tradition surfactant connected by a spacer group.The self-assembly behavior of Gemini surfactant molecules in aqueous solutions, and the influences of ethanol on both the self-assembly structure and the critical micelle concentration (CMC) were investigated using dissipative particle dynamics (DPD) with a simple ball-spring model.Results show that as the concentration increases, the surfactant molecules self-assemble to form spherical, wormlike and layered micelles phase molecular packing.The addition of ethanol may enhance the solubility of hydrophobic groups of surfactant molecules in water and thus may inhibit the formation of micelles and increase the CMC of surfactant solutions.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%