pH-responsive corrosion protection of chitosan-coated hollow mesoporous silica microspheres loaded with 2-mercaptobenzothiazole coating on copper substrates  

壳聚糖包覆负载2-巯基苯并噻唑的介孔二氧化硅微球对铜基体的pH响应自修复性能

作　　者：CHU Gui-wen WANG Zhi-hao ZHANG Hao-ran WU Peng ZHANG Jian-kai SHI Hao SONG Li-ying MA Fu-bin SUN Qiang GAO Zhan WANG Yi-xiang SUN Lei CAO Zi-chen 褚贵文;王志豪;张浩然;武鹏;张建凯;石浩;宋立英;麻福斌;孙强;高瞻;王艺翔;孙雷;曹子琛(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China;CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China)

机构地区：[1]College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China

出　　处：《Journal of Central South University》2024年第10期3532-3546,共15页中南大学学报（英文版）

基　　金：Project(2023YFC2907304)supported by the National Key R&D Program Projects,China;Project(ZR2021ME087)supported by the Natural Science Foundation of Shandong Province,China;Project(2022KLMM305)supported by the Shandong Provincial Key Laboratory of Mining Machinery Engineering School Enterprise Joint Fund,China;Project(2023CXPT062)supported by the Shandong Key Research and Development Program(Competitive Innovation Platform),China。

摘　　要：An active protection coating for pH-responsive was prepared.The hollow mesoporous silica microspheres(HMSNs)were loaded with 2-mercaptobenzothiazole(MBT),and then they were coated with chitosan(CS).The composite microspheres were in the range of 650−750 nm in diameter.CS-HMSN-MBT coating had a faster repair rate under acidic conditions by synergistic effect between CS and MBT.The repair rate under alkaline conditions was slowed down.The active protection performance reached the strongest after 3 d immersion.The corrosion inhibitor release mechanism was optimized to extend the service life of the coating and to achieve long-term service of the copper substrate.腐蚀是导致材料失效的重要因素。本文制备了一种用于pH响应的活性保护涂层。在中空介孔二氧化硅微球(HMSN)上负载2-巯基苯并噻唑(MBT),然后在其表面包覆壳聚糖(CS)。复合微球的直径范围为650~750 nm。壳聚糖增强了复合微球的相容性。在壳聚糖和2-巯基苯并噻唑的协同作用下,CS-HMSN-MBT涂层呈现不同的pH响应性能。在酸性条件下的修复速度更快,在碱性条件下修复速度有所减慢。海水浸泡3 d后,活性保护性能达到最强。通过优化缓蚀剂释放机制,延长了涂层的使用寿命,并实现了铜基材的长期使用。

关 键 词：copper matrix nanocomposites PH-RESPONSIVE active protection synergistic effect 

分 类 号：TG174.4[金属学及工艺—金属表面处理]