Superior anti-corrosion and self-healing bi-functional polymer composite coatings with polydopamine modified mesoporous silica/graphene oxide

Yanqi Ma ¹Haowei Huang ²Hongda Zhou ³Michael Graham ³James Smith ³Xinxin Sheng ¹Ying Chen ¹Li Zhang ¹Xinya Zhang ⁴Elena Shchukina ³Dmitry Shchukin³

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作者信息

1. Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter,School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China
2. School of Chemistry and Chemical Engineering,Guangdong Provincial Key Lab of Green Chemical Product Technology,South China University of Technology,Guangzhou 510640,China;Stephenson Institute for Renewable Energy,Department of Chemistry,University of Liverpool,Crown Street,Liverpool L697ZD,UK
3. Stephenson Institute for Renewable Energy,Department of Chemistry,University of Liverpool,Crown Street,Liverpool L697ZD,UK
4. School of Chemistry and Chemical Engineering,Guangdong Provincial Key Lab of Green Chemical Product Technology,South China University of Technology,Guangzhou 510640,China
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Abstract

In this article,graphene oxide (GO) and benzotriazole-loaded mesoporous silica nanoparticles (BTA/MSNs)are combined on micro scale through the in situ polymerization of polydopamine (PDA),preparing a self-healing bi-functional GO (fGO) used as nano-fillers for anti-corrosion enhancement of waterborne epoxy(WEP) coatings.Scanning electronic microscopy (SEM) images show that the BTA/MSNs are uniformly distributed on the surface of high aspect ratio GO nanosheets to endow GO nanocontainer characteristics.UV-vis profiles demonstrate that fGO has pH-controlled release function.Modulus at lowest frequency is generally used for comparing the corrosion resistance of organic coatings.Modulus at lowest frequency(1.42 × 107 Ω cm2) after 30 days immersion in 3.5 wt.％ NaCl solution revealed 2 orders of magnitude higher that of blank WEP (1.17 × 105 Ω cm2).With artificial cracks on its coatings,fGO/WEP had no obvious rust compared with blank WEP after 240 h of immersion.We anticipate that self-healing and physical barrier bi-functional nanocontainers improve the traditional anticorrosion coating efficiency with better,longer-lasting performance for shipping,oil drilling or bridge maintenance.

Key words

Mesoporous silica/Graphene oxide/Anti-corrosion/Self-healing/Functional composite coatings

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基金项目

National Natural Science Foundation of China(51908031)

China Scholarship Council for a graduate fellowship(201906150013)

Guangdong Special Support Program(2017TX04N371)

ES and DS thank ERC Enercapsule project(647969)

Royal Society project(IEC\R2\202163)

出版年

2021

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58

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