Triple-Action Self-Healing Protective Coatings Based on Shape Memory Polymers Containing Dual-Function Microspheres

被引：194
作者：
Huang, Yao [1 ]
Deng, Leping [1 ]
Ju, Pengfei [2 ]
Huang, Luyao [1 ]
Qian, Hongchang [1 ]
Zhang, Dawei [1 ]
Li, Xiaogang [1 ]
Terryn, Herman A. [3 ]
Mol, Johannes M. C. [4 ]
机构：
[1] Univ Sci & Technol Beijing, Ctr Corros & Protect, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[2] Shanghai Aerosp Equipment Manufacturer, Shanghai 200245, Peoples R China
[3] Vrije Univ Brussel, Dept Mat & Chem, Res Grp Electrochem & Surface Engn, B-1050 Brussels, Belgium
[4] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 Delft, Netherlands
来源：
ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 27期
基金：
中国国家自然科学基金;
关键词：
corrosion; self-healing coating; corrosion inhibitor; shape memory polymer; smart materials; ENHANCED CORROSION PROTECTION; SMART COATINGS; EPOXY COATINGS; NANOCONTAINERS; PERFORMANCE; AA2024; MICROCAPSULES; POLYANILINE; PARTICLES; ABILITY;
D O I：
10.1021/acsami.8b06985
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, a new self-healing shape memory polymer (SMP) coating was prepared to protect the aluminum alloy 2024-T3 from corrosion by the incorporation of dual-function microspheres containing polycaprolactone and the corrosion inhibitor 8-hydroxyquinoline (8HQ). The self-healing properties of the coatings were investigated via scanning electron microscopy, electrochemical impedance spectroscopy, and scanning electrochemical microscopy following the application of different healing conditions. The results demonstrated that the coating possessed a triple-action self-healing ability enabled by the cooperation of the 8HQ inhibitor, the SMP coating matrix, and the melted microspheres. The coating released 8HQ in a pH-dependent fashion and immediately suppressed corrosion within the coating scratch. After heat treatment, the scratched coating exhibited excellent recovery of its anticorrosion performance, which was attributed to the simultaneous initiation of scratch closure by the shape memory effect of the coating matrix, sealing of the scratch by the melted microspheres, and the synergistic effect of corrosion inhibition by 8HQ.
引用
收藏
页码：23369 / 23379
页数：11
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