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

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

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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 ℃ 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.

Self-healingPhotothermalInterfacial regulationDual-functional BiOI@Bi2S3Antibacterial

Huimeng Feng、Tong Wang、Wei Wang、Chengcheng Ma、Yanan Pu、Shougang Chen

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School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey Research and Development Program of Shandong provinceFoundation of Key Laboratory of National Defense Science and Technology

52371081U21062262020CXGC010703JS220406

2024

10.1016/j.jmst.2023.08.007

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)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.173(6)
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