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Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties
Qian, Hongchang; Xu, Dake; Du, Cuiwei; Zhang, Dawei; Li, Xiaogang; Huang, Luyao; Deng, Leping; Tu, Yunchao; Mol, Johannes M. C.; Terryn, Herman A.; Zhang, DW (reprint author), Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing 100083, Peoples R China.
2017-02-07
Source PublicationROYAL SOC CHEMISTRY
ISSN2050-7488
Volume5Issue:5Pages:2355-2364
AbstractThis 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.; 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.
description.department[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
Subject AreaChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
Funding OrganizationNational 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]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79189
Collection中国科学院金属研究所
Corresponding AuthorZhang, DW (reprint author), Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing 100083, Peoples R China.
Recommended Citation
GB/T 7714
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.
APA Qian, Hongchang.,Xu, Dake.,Du, Cuiwei.,Zhang, Dawei.,Li, Xiaogang.,...&Zhang, DW .(2017).Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties.ROYAL SOC CHEMISTRY,5(5),2355-2364.
MLA Qian, Hongchang,et al."Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties".ROYAL SOC CHEMISTRY 5.5(2017):2355-2364.
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