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题名: Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties
作者: Qian, Hongchang;  Xu, Dake;  Du, Cuiwei;  Zhang, Dawei;  Li, Xiaogang;  Huang, Luyao;  Deng, Leping;  Tu, Yunchao;  Mol, Johannes M. C.;  Terryn, Herman A.
通讯作者: Zhang, DW (reprint author), Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing 100083, Peoples R China.
发表日期: 2017-2-7
学科主题: Chemistry, Physical;  Energy & Fuels;  Materials Science, Multidisciplinary
摘要: This work introduces a new self-healing superhydrophobic coating based on dual actions by the corrosion inhibitor benzotriazole (BTA) and an epoxy-based shape memory polymer (SMP). Damage to the surface morphology (e.g., crushed areas and scratches) and the corresponding superhydrophobicity are shown to be rapidly healed through a simple heat treatment at 60 degrees C for 20 min. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) were used to study the anti-corrosion performance of the scratched and the healed superhydrophobic coatings immersed in a 3.5 wt% NaCl solution. The results revealed that the anticorrosion performance of the scratched coatings was improved upon the incorporation of BTA. After the heat treatment, the scratched superhydrophobic coatings exhibited excellent recovery of their anti-corrosion performance, which is attributed to the closure of the scratch by the shape memory effect and to the improved inhibition efficiency of BTA. Furthermore, we found that the pre-existing corrosion product inside the coating scratch could hinder the scratch closure by the shape memory effect and reduce the coating adhesion in the scratched region. However, the addition of BTA effectively suppressed the formation of corrosion products and enhanced the self-healing and adhesion performance under these conditions. Importantly, we also demonstrated that these coatings can be autonomously healed within 1 h in an outdoor environment using sunlight as the heat source.
资助者: National Natural Science Foundation of China [51401018]; National Basic Research Program of China (973 Program) [2014CB643300]; Open Fund of Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences [MCKF201609]
英文摘要: This work introduces a new self-healing superhydrophobic coating based on dual actions by the corrosion inhibitor benzotriazole (BTA) and an epoxy-based shape memory polymer (SMP). Damage to the surface morphology (e.g., crushed areas and scratches) and the corresponding superhydrophobicity are shown to be rapidly healed through a simple heat treatment at 60 degrees C for 20 min. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) were used to study the anti-corrosion performance of the scratched and the healed superhydrophobic coatings immersed in a 3.5 wt% NaCl solution. The results revealed that the anticorrosion performance of the scratched coatings was improved upon the incorporation of BTA. After the heat treatment, the scratched superhydrophobic coatings exhibited excellent recovery of their anti-corrosion performance, which is attributed to the closure of the scratch by the shape memory effect and to the improved inhibition efficiency of BTA. Furthermore, we found that the pre-existing corrosion product inside the coating scratch could hinder the scratch closure by the shape memory effect and reduce the coating adhesion in the scratched region. However, the addition of BTA effectively suppressed the formation of corrosion products and enhanced the self-healing and adhesion performance under these conditions. Importantly, we also demonstrated that these coatings can be autonomously healed within 1 h in an outdoor environment using sunlight as the heat source.
部门归属: [Qian, Hongchang;  Xu, Dake;  Du, Cuiwei;  Zhang, Dawei;  Li, Xiaogang;  Huang, Luyao;  Deng, Leping;  Tu, Yunchao] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing 100083, Peoples R China;  [Xu, Dake] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China;  [Mol, Johannes M. C.] Delft Univ Technol, Dept Mat Sci & Engn, NL-2600 AA Delft, Netherlands;  [Terryn, Herman A.] Vrije Univ Brussel, Dept Mat & Chem, Res Grp Electrochem & Surface Engn, Brussels, Belgium
刊名: ROYAL SOC CHEMISTRY
收录类别: SCI
内容类型: 期刊论文
URI标识: http://ir.imr.ac.cn/handle/321006/79189
ISSN号: 2050-7488
语种: 英语
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Qian, Hongchang,Xu, Dake,Du, Cuiwei,et al. Dual-action Smart Coatings With A Self-healing Superhydrophobic Surface And Anti-corrosion Properties[J]. Royal Soc Chemistry,2017,5(5):2355-2364.

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