材料科学技术(英文版)2022，Vol.107Issue(12) ：34-42.

Photothermal and pH dual-responsive self-healing coating for smart corrosion protection

Yao Huang Panjun Wang Weimin Tan Wenkui Hao Lingwei Ma Jinke Wang Tong Liu Fan Zhang Chenhao Ren Wei Liu Dawei Zhang
材料科学技术(英文版)2022，Vol.107Issue(12) ：34-42.
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Photothermal and pH dual-responsive self-healing coating for smart corrosion protection

Yao Huang 1Panjun Wang 1Weimin Tan 2Wenkui Hao 3Lingwei Ma 4Jinke Wang 1Tong Liu 1Fan Zhang 1Chenhao Ren 1Wei Liu 5Dawei Zhang4
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作者信息

  • 1. Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;National Materials Corrosion and Protection Data Center,University of Science and Technology Beijing,Beijing 100083,China
  • 2. National Engineering Research Center for Coatings,CNOOC Changzhou Paint and Coatings Industry Research Institute,Changzhou 213016,China
  • 3. State Key Laboratory of Advanced Power Transmission Technology(Global Energy Interconnection Research Institute Co.Ltd.,),Beijing 100083,China
  • 4. Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;National Materials Corrosion and Protection Data Center,University of Science and Technology Beijing,Beijing 100083,China;BRI Southeast Asia Network for Corrosion and Protection(MOE),Shunde Graduate School of University of Science and Technology Beijing,Foshan 528300,China
  • 5. National Materials Corrosion and Protection Data Center,University of Science and Technology Beijing,Beijing 100083,China
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Abstract

A novel self-healing coating with photothermal and pH dual-responsive properties has been de-signed to protect carbon steel against corrosion by loading the stimuli-responsive microcapsules into a shape memory epoxy coating.The sandwich-like microcapsules were based on reduced graphene oxide/mesoporous silica(rGO@MS)assembled with a pH-responsive poly(N,N-dimethylaminoethyl methacrylate)(PDMAEMA)layer,and were loaded with benzotriazole(BTA)inhibitors(abbreviated as rGO@MS-P-BTA).Under near-infrared(NIR)light irradiation,the prominent photothermal effect of rGO could not only elevate the coating temperature to activate the shape memory effect and close the coating scratch,but also facilitate the release of corrosion inhibitors to suppress the corrosion activity.Moreover,the PDMAEMA as a pH-driven"gatekeeper"realized the controlled release of BTA from microcapsules at acid conditions.The surface morphology analysis,electrochemical impedance spectroscopy(EIS),and scanning electrochemical microscopy(SECM)were performed to evaluate the self-healing performance of the composite coatings.The results showed that the combination of NIR light and pH-responsive self-healing effects endowed the coating with short healing time and prominent healing efficiency.

Key words

Self-healing coatings/Corrosion inhibitors/Photothermal effects/pH-responsive/Shape memory polymers

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基金项目

National Natural Science Foun-dation of China(51771029)

National Natural Science Foun-dation of China(51901015)

出版年

2022
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量56
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