High efficiency photothermal cyclic self-healing antibacterial coating based on in-situ dual-functional BiOI@Bi2S3

被引:38
作者
Feng, Huimeng [1 ]
Wang, Tong [1 ]
Wang, Wei [1 ]
Ma, Chengcheng [1 ]
Pu, Yanan [1 ]
Chen, Shougang [1 ]
机构
[1] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
来源
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2024年 / 173卷
基金
中国国家自然科学基金;
关键词
Self-healing; Photothermal; Interfacial regulation; Dual-functional BiOI@Bi 2 S 3; Antibacterial;
D O I
10.1016/j.jmst.2023.08.007
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Although extremely challenging, it is highly desirable to develop self-healing materials that exhibit high efficiency under environmental conditions for marine protection applications. In this work, polyurethane elastomers with hydrogen bond and dimethylglyoxime-urethane (DOU) coordination complex were com-bined with in-situ dual-functional BiOI@Bi2S3 to synthesize high-efficiency photothermal cyclic self-healing antibacterial coating. The photothermal efficiency of BiOI@Bi2S3 is improved by 38% through in-terfacial regulation. BiOI@Bi2S3/PU rapidly rises by 50.2 & DEG;C within 300 s under near-infrared (NIR) light, which can trigger the hydrogen bond of polyurethane coating and recover the barrier properties of the coating through self-healing. Density functional theory was used to simulate and analyze the generation of multiple electron transfer paths after the vulcanization of BiOI, which improves the interfacial mobility of photogenerated carriers and generates more heat. Importantly, molecular dynamics verified the self-healing mechanism of hydrogen bond and the photothermal lifting mechanism of the coating. After 5th scratches and self-healing cycle tests, the coating has a self-healing efficiency of more than 80%, which can ensure the self-healing and anticorrosion protection performance of the coating for multiple cycles. The photocatalytic and photothermal properties of BiOI@Bi2S3 enhance the antibacterial rate of the coat-ing up to 99%. This work provides heuristic perspectives for the design of coatings with anti-corrosion, antibacterial and self-healing properties.& COPY; 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码:121 / 136
页数:16
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