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

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

褚贵文 ¹王志豪 ¹张浩然 ¹武鹏 ¹张建凯 ¹石浩 ¹宋立英 ¹麻福斌 ²孙强 ¹高瞻 ¹王艺翔 ¹孙雷 ¹曹子琛¹

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作者信息

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
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摘要

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3d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.

Abstract

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.

关键词

铜基体/纳米复合材料/pH响应/主动修复/协同效应

Key words

copper matrix/nanocomposites/pH-responsive/active protection/synergistic effect

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出版年

2024

中南大学学报(英文版)

中南大学

中南大学学报(英文版)

CSTPCDEI

影响因子：0.47

ISSN：2095-2899

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