Al-AA原位电化学聚合涂层研究

Al-AA原位电化学聚合涂层研究 AN APPROACH OF ALUMINIUM ACRYLIC ACID COATING FORMING BY in situ ELECTROCHEMICAL POLYMERIZATION 顾志忙 Gu Zhimang 1 first-author 陶映初 Tao Yingchu 1 张曦 Zhang Xi 1 武汉大学环境科学系 武汉大学环境科学系 Department of Environment Science, Wuhan University Department of Environment Science, Wuhan University 采用恒电位法在铝阴极上原位电化学聚合丙烯酸（ＡＡ）形成聚合涂层，研究了电聚合电位、支持电解质及单体浓度等对成膜的影响，考察了电流密度随电聚合时间的变化趋势．实验结果表明，当电聚合电位为８．０Ｖ时，一定浓度的丙烯酸溶液中添加０．０５ｍｏｌ·Ｌ－１ＡｌＣｌ３支持电解质，电聚合３０ｍｉｎ即可得到３～５μｍ厚致密涂层．室温下，含１５μｍ厚致密涂层的铝样在３０ｇ·Ｌ－１ＮａＣｌ溶液中浸泡近一个月时间，涂层才破裂脱落．用扫描电子显微镜（ＳＥＭ）和Ｘ射线光电子能谱（ＸＰＳ）技术确证了膜层的形貌结构，讨论了Ａｌ－ＡＡ阴极电化学聚合的机理． The method of constant potential was used to coat aluminum cathode by in situ electrochemical polymerization （ECP） from monomer of acrylic acid.The influences of cell potential and monomer concentration on the performance and morphology of the coating have been studied. At the same time , the variation of current in the ECP process was observed. The coating of 3￣5 μm thickness can be obtained with 8V polymerization potential for 30 mintues in 0.5￣5.0 mol·L -1 AA solution containing 0.05 mol·L -1 AlCl 3 supporting electrolyte.The coating of 15 μm thickness on Al will not happen damage for 28 days in 30 g·L -1 NaCl solution at ambient temperature.The morphology and structure of some kinds of coating were analysed by the method of SEM and XPS ,and the mechanism of electrochemical polymerization was briefly discussed. 电化学聚合 原位涂层 铝 丙烯酸 electrochemical polymerization coating forming by in situ aluminum acrylic acid TG174.41 国家自然科学基金(61672102) 1998-04-01 2021-04-01 4