水溶性聚合物和两亲聚合物——10.两亲聚合物PAMC_(16)S的自组装有序膜

Water-Soluble and Amphiphilic Polymers: 10. Ordered films by self-assembly of an amphiphilic polymer PAMC_(16)S

用自组装技术在金(纯金和经阳极氧化的金)表面上获得了新型两亲聚合物PAMC_(16)S的有序膜。用接触角测试,XPS谱和电化学分析等方法对自组装膜进行了表征。根据膜表面的润湿性,金表面的自组装膜是疏水的,亲水的磺酸基团连于金表面,而疏水的碳氢链从表面伸展出。XPS实验结果支持金表面上单层膜的疏水结构。聚合物单层膜复盖的金电极起到含有针孔缺陷的阻膈型电极的作用。单层膜在法拉第反应中显示很强的吸附稳定性,说明聚合物LB膜在潜在应用中有其特有的特点。

Ordered films of a novel amphiphilic polymer PAMC_(16)S have been obtained on gold surfaces (clean gold and anodized gold) by self-assembly technique. The self-assembled films have heen characterized by contact angle measurements, XPS and electrochemical analysis. Judging by surface wettability, the films on gold surfaces are hydrophobic with the hydrophilic sulfonic acid groups ajacent to the surfaces and hydrocarbon chains extended from the surfaces. The hydrophobic structure of the monolayers is supported by the XPS observations. The polymer monolayer-covered gold electrodes behave as blocked ones containing pinhole defcets. The monolayers exhibit great adsorption stability during the faradaic reactions, illustrating the advantage of polymeric LB films in the potential applications.