Smart self-healing coating with multiple synergistic effects based on ZIF-11 for corrosion protection of carbon steel

被引:5
作者
Zhang, Meng [1 ]
Wan, Jieru [1 ]
Wang, Jian [1 ]
Wang, Sheng [1 ]
Cao, Yangyang [1 ]
He, Yuzhu [1 ]
Wang, Yanli [1 ]
Song, Dalei [1 ]
Zhang, Tao [1 ]
Wang, Jun [1 ]
机构
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
关键词
Self-healing; ZIF-11; Corrosion protection; pH-responsive; Polymer; MIXED-MATRIX MEMBRANES; CONTROLLED-RELEASE; PERFORMANCE; WATER; RESISTANCE; SEPARATION; NANO;
D O I
10.1016/j.colsurfa.2024.133186
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Adding fillers with corrosion inhibitors to organic coatings is an effective and common strategy for enhancing active and passive corrosion protection of coatings. However, most of the self -healing coatings only can offer limited corrosion protection because of a single corrosion inhibitor loaded in fillers. Herein, a smart self -healing coating system (ZIF-11-PAACe-EP) consisting of epoxy coating containing ZIF-11 encapsulated by cerium polyacrylate (PAACe) polymer (ZIF-11-PAACe) was designed. The anti -corrosion and self -healing properties of ZIF11-PAACe-EP were evaluated by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The EIS results show that the impedance modulus at the low frequency (|Z|0.01 Hz) of ZIF-11-PAACe-EP can continuously increase with time and reach 4.01 x 1010 omega & sdot;cm2 after 60 days of immersion. ZIF-11-PAACe-EP can provide long-term corrosion protection for steel, which is attributed to its excellent self -healing abilities conferred by multiple synergistic effects of benzimidazole (BIM), Zn2+ and Ce3+ ions released from ZIF-11-PAACe based on pH -stimuli response. The design of the pH -responsive self -healing coating system with multiple synergistic effects will provide a new strategy for the fabrication of highly efficient anti -corrosion coating.
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页数:13
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