新型导电聚噻吩双重自修复涂层防腐特性研究

The corrosion of metallic materials inflicts huge economic losses and environmental hazards as well as grave safety incidents. This fact has initiated intensive research activities in the search for environmental-friendly and highly anticorrosive materials for corrosion protection. Great efforts have been contributed into conducting polymer based self-healing coatings, which is one of the most effective ways for corrosion inhibition in recent years. In this project, we aim to develop novel poly (3,4-ethylenedioxythiophene) (PEDOT) hollow spheres doped and encapsulated with smart inhibitors. The as-prepared PEDOT hollow spheres used as corrosion inhibiting additions and carbon black as a good conductive spacer (CB) will be introduced into the a polyvinyl butyral (PVB) binder matrix to make the dually self-healing model coatings of PEDOT/CB/PVB to investigate the anticorrosive property and mechanism of the model coatings. We will discuss the possible formation mechanism and the critical factor that how the two different inhibitors could load in a PEDOT hollow sphere. On the basis of these studies, we will analyze the connection between the dispersion of PEDOT and CB particles in PVB matrix and the position and concentration of the released inhibitors. The relationship between the law of inhibitor release and the anticorrosive performances will be revealed according to the abovementioned analysis. Furthermore, the mechanism that two inhibitors release simultaneously to inhibit corrosion due to the synergistic effect will be shown. This will open a new way to search and develop anticorrosive materials based on conducting polymers, which could prevent the corrosion of metallic materials. This study will be of significant importance on the corrosion inhibition and industry application.

金属腐蚀问题不仅给社会发展带来了巨大经济损失和环境危害，同时导致严重的安全事故。因此，研究绿色高耐蚀涂层材料，解决金属腐蚀问题成为世界性重要研究课题。导电聚合物自修复涂层是当前解决金属腐蚀最有效手段之一，得到广泛关注。本项目拟围绕研制掺杂和包裹缓蚀剂共存的聚(3，4-二氧乙基噻吩)(PEDOT)空心微球，研究以PEDOT为填料、炭黑（CB）为导电“桥梁”、聚乙烯醇缩丁醛（PVB）为聚合物基底的双重自修复涂层的防腐性能及机理。探讨PEDOT微胶囊同时负载两种缓蚀剂的调控因素及形成机制，明确PEDOT和CB在PVB基底中分散性与防腐涂层中两种缓蚀剂释放位置和浓度的关系，揭示缓蚀剂释放规律与涂层防腐性能关系，提出两种缓蚀剂释放发挥双重自修复的防腐作用机理，进而提供最优防腐材料的研发方法和遴选依据，最终达到防止金属腐蚀的目的。该项目的研究内容对实现金属防腐和工业化应用具有重要参考价值。

金属腐蚀问题给社会发展带来了巨大经济损失和环境危害，同时会导致严重的安全事故。因此，研究绿色高耐蚀涂层材料，解决金属腐蚀问题成为世界性重要研究课题。导电聚合物自修复防腐涂层是当前解决金属腐蚀最有效手段之一，得到广泛关注。本项目依据所提出的研究计划，重点调控相关聚合条件，成功制备得到四种目标产物即兼具掺杂缓蚀剂和包覆缓蚀剂的PEDOT微胶囊材料；通过交流阻抗实验，详细研究了基于PEDOT目标产物的环氧涂层对Zn、Fe、Cu等不同金属的防腐性能及防腐机制，结果表明该涂层具有良好的双重自修复性能，可使金属腐蚀速率下降到0.01 毫米/年，这种双重自修复材料在金属防腐领域具有潜在的应用价值，达到项目的预期目标，顺利完成项目所有内容。.依托该项目的支持，目前已标注基金项目发表SCI论文3篇，已投修改的SCI论文2篇，申请专利2项，4篇论文在准备及投稿，项目按预期目标已完成，项目可以结题。