硬脂酸钠在油/水界面自组装膜的电化学研究  

The Electrochemical Study on Self-assembled Monolayers of Sodium Stearate Surfactant on Oil/Water Interface

作　　者：唐丽娜[1] 王凤平[1] 朱永春[2] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029 [2]沈阳师范大学化学与生命科学学院,辽宁沈阳110034

出　　处：《电化学》2006年第3期324-328,共5页Journal of Electrochemistry

基　　金：国家自然基金(50171011);辽宁省教育厅项目(2004C003)资助

摘　　要：应用循环伏安法,以铜离子为探针研究硬脂酸钠在油/水界面上的自组装过程.结果表明,硬脂酸钠在蓖麻油/水界面上自组装,经4种聚集状态而达到完整的有序单层膜.Cu2+离子在涂蓖麻油电极上的氧化是完全受吸附控制,而在表面活性剂硬脂酸钠自组装膜的油/水界面上,则其电极过程受扩散和吸附两者混合控制.循环伏安测试给出,峰电流ip随扫描速率v变化的拟合方程为:ip=9.214?3.889v1/2+0.5809v,r=0.9978.The self-assembled monolayers of sodium stearate surfactant on oil/water interface was investigated by CV with copper ion as probe. The self-assembling process includes four stages, and forms a stable assembly. The electrochemical oxidation of copper ion at assembled surface is a combine controlled process both surface and diffusion with regression equation as ip = 9. 214 -3. 889 v^1/2 ＋0. 5809v ,r =0.9978, compared with the oil covered bared electrode, it is a complete surface controlled.

关 键 词：白组装膜 硬脂酸钠 油/水界面 循环伏安 铜离子 

分 类 号：O647.2[理学—物理化学]