基于负载2-MBI缓蚀剂的碗状介孔聚多巴胺纳米容器的酸响应自修复水性环氧涂料：制备、释放行为及防腐性能
Acid-Responsive Self-Healing Waterborne Epoxy Coating: Preparation, Release Behavior, and Anticorrosion Performance Based on Bowl-Shaped Mesoporous Polydopamine Nanocontainer Loaded with 2-MBI Inhibitors.
作者信息
Ji Xiaohong, Yang Minghui, Tian Huiwen, Hou Jin, Su Jingqiang, Wang Zhen, Zhang Zixue, Tian Yuefeng, Zhou Liangliang, Hu Guanghua, Yang Yunfei, Duan Jizhou, Hou Baorong
机构信息
State Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
出版信息
Polymers (Basel). 2025 Aug 21;17(16):2265. doi: 10.3390/polym17162265.
We present a straightforward emulsion-induced interfacial anisotropic assembly method for in- situ synthesis of bowl-shaped, self-encapsulated mesoporous polydopamine (BMPDA) nanocontainers (M-M@P) loaded with 2-mercaptobenzimidazole (2-MBI). Results showed that the loading capacity of the bowl-shaped mesoporous polydopamine reaches 24 wt.%. The M-M@P exhibits a cumulative MBI release of 91.61% after immersion in a 3.5 wt.% NaCl solution at pH = 2 for 24 h, accompanied by a corrosion inhibition efficiency of 95.54%. Additionally, the acid-responsive M-M@P not only enables controlled release of MBI but also synergistically promotes the formation of a protective film on the carbon steel substrate via the chelation of PDA-Fe, thereby enhancing the self-healing performance of waterborne epoxy coatings.
我们提出了一种简单的乳液诱导界面各向异性组装方法，用于原位合成负载2-巯基苯并咪唑（2-MBI）的碗状、自封装介孔聚多巴胺（BMPDA）纳米容器（M-M@P）。结果表明，碗状介孔聚多巴胺的负载量达到24 wt.%。将M-M@P浸入pH = 2的3.5 wt.% NaCl溶液中24小时后，其MBI累积释放率为91.61%，同时缓蚀效率为95.54%。此外，酸响应性的M-M@P不仅能够实现MBI的可控释放，还能通过PDA-Fe的螯合作用协同促进碳钢基底上保护膜的形成，从而增强水性环氧涂层的自修复性能。
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