表面技术2025，Vol.54Issue(8)：74-83,135,11.DOI:10.16490/j.cnki.issn.1001-3660.2025.08.006
多功能埃洛石纳米管防腐蚀超疏水自修复涂层
Multifunctional Halloysite Nanotube Anti-corrosion Superhydrophobic Self-healing Coating
摘要
Abstract
At present,coating technology is widely used in metal corrosion protection.For traditional anticorrosive coatings,when the coating is damaged due to external interference,the bare metal matrix at the scratch will be corroded,and the corrosive substances attached to the surface of the coating will also accelerate the failure of the coating to a certain extent,resulting in metal corrosion.In this paper,a self-healing anticorrosive coating with superhydrophobic ability is prepared with alkali-etched nanotubes(HNTs)modified with corrosion inhibitor benzotriazole(BTA)and octadecyl trimethoxysilane(OTMS)as nano-filler.The comparison of BTA,HNTs and HNTS-BTA by Fourier transform infrared spectroscopy(FTIR)confirms that HNTs successfully load the corrosion inhibitor BTA,and the comparison of HNTS-BTA and OTMS-HNTS-BTA confirms that OTMS is successfully added to the outer surface.The successful loading of BTA and the coating of OTMS are proved by thermogravimetric analysis(TGA).The water contact angle of the OTMS-HNTs-BTA coating is 153°,while that of the HNTs-BTA coating is 103° and that of the blank coating is 77°.It is proved that the OTMS-HNTs-BTA coating has super hydrophobic properties and friction experiments show that the coating has certain wear resistance.Electrochemical impedance(EIS)is used to analyze the self-healing ability of the coating.When the coating is scratched,the HNTs at the scratch are damaged,and the corrosion inhibitor BTA is released and bonded with the copper matrix through strong electrochemisorbed to form a protective film.By analyzing the impedance mode value of the self-healing coating,the self-healing ability of the coating reaches the maximum on the 6th day.The impedance data of the experiment are fitted with ZSimpWin,and the self-healing ability of the coating is confirmed.By observing the surface morphology of HNTs-BTA and OTMS-HNTS-BTA,it can be seen that the morphology and structure of Halloysite nanotubes are not changed after alkali etching and surface modification,and a thin film is formed on the outer surface after OTMS modification.According to SEM and EDS tests,the content of copper in the scratches of the repaired coating is significantly reduced.When scratches are produced,the content of copper is about 72.9％,while when soaked in 3.5wt.％NaCl solution for 6 d,the content of copper in the scratches is reduced to 3.4％,indicating that the scratches are successfully repaired.The coating release inhibitor successfully covers the metal surface to form a protective film.The scanning Kelvin probe(SKP)test finds that the potential valley at the scratch gradually decreases with time and disappears at the 6th day,indicating that the scratch is repaired by the corrosion inhibitor,and the repair effect reaches the best at the 6th day.By alkali etching of alloxite nanotubes,loading corrosion inhibitor BTA and surface modification on the outer surface of alloxite using OTMS,the modified alkali-etched alloxite nanotubes with corrosion inhibitor are blended with epoxy resin.The prepared OTMS-HNTs-BTA coating can effectively prevent the adhesion of corrosive substances and has self-healing ability when the coating is damaged,which can effectively protect the metal surface and extend the service life of the coating.关键词
碱刻蚀埃洛石纳米管/苯并三氮唑/十八烷基三甲氧基硅烷/超疏水/自修复涂层Key words
alkali-etched halloysite nanotubes/benzotriazole/octadecyltrimethoxysilane/superhydrophobic/self-healing coating分类
金属材料引用本文复制引用
包继华,张浩然,王志豪,武鹏,宋立英,蒋全通,麻福斌..多功能埃洛石纳米管防腐蚀超疏水自修复涂层[J].表面技术,2025,54(8):74-83,135,11.基金项目
山东省自然科学基金(ZR2021ME087) （ZR2021ME087）
十四五国家重点研发计划项目(2023YFC2907304)Natural Science Foundation of Shandong Province(ZR2021ME087) （2023YFC2907304）
14th Five-Year National Key R&D Program(2023YFC2907304) （2023YFC2907304）
