Self-healing protective coating with dual reversible bonds triggered by photothermal responsive Co9S8@Bi2S3 hollow core-shell nanofillers

doi:10.1016/j.porgcoat.2023.107891

	Self-healing protective coating with dual reversible bonds triggered by photothermal responsive Co9S8@Bi2S3 hollow core-shell nanofillers
	Kang, Qianqian 1; Wang, Wei 1; Wang, Tong 1; Mao, Zhipeng 1; Li, Wen 1; Wang, Peng2 ; Chen, Shougang 1
	2023-12-01
发表期刊	PROGRESS IN ORGANIC COATINGS
ISSN	0300-9440
卷号	185 页码:15
通讯作者	Wang, Wei([email protected]) ; Chen, Shougang([email protected])
摘要	Herein, we develop a novel composite coating with excellent self-healing and anticorrosion properties activated by photothermal responsive hollow core-shell nanofillers. A photothermal heterojunction Co9S8@Bi2S3 was prepared and integrated into polyurethane containing disulfide bonds. It is found that the heterojunction has enhanced the light absorption capacity and has increased the number and lifetime of photogenerated electron hole pairs, making more photogenerated charges pass through the heterojunction interface by reducing interface transfer resistance and releasing heat as well. Under 808 nm near-infrared light irradiation, the photothermal effect of Co9S8@Bi2S3 can trigger the reconstruction of dynamic disulfide bonds and reversible hydrogen bonds simultaneously to heal coating scratches. The surface characterization and electrochemical test results manifest that the coating containing 2 wt% 10 %-Co9S8@Bi2S3 nanofillers displayed excellent self-healing and anticorrosive capabilities. The self-healing efficiency of nearly 90 % was achieved after five-time cutting-healing cycles on the coating. The protection performance of the initial immersion stage could be restored by nearly 100 % after five-time self-healing, and the low-frequency impedance modulus was above 108 & omega; cm2 even after 60 days of immersion. This work would provide a new tactic for developing multi-cycle self-healing coatings triggered by photothermal effects.
关键词	Hollow structure Photothermal response Disulfide bond Self-healing coating Corrosion protection
DOI	10.1016/j.porgcoat.2023.107891
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42076039]; Natural Science Foundation for Shandong Province[ZR2020ME016]; Fundamental Research Funds for the Central Universities[202165004]
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Applied ; Materials Science, Coatings & Films
WOS记录号	WOS:001067285900001
出版者	ELSEVIER SCIENCE SA
WOS关键词	ANTICORROSION
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/181827
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Wang, Wei; Chen, Shougang
作者单位	1.Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, 7 Nanhai Rd, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Kang, Qianqian,Wang, Wei,Wang, Tong,et al. Self-healing protective coating with dual reversible bonds triggered by photothermal responsive Co9S8@Bi2S3 hollow core-shell nanofillers[J]. PROGRESS IN ORGANIC COATINGS,2023,185:15.
APA	Kang, Qianqian.,Wang, Wei.,Wang, Tong.,Mao, Zhipeng.,Li, Wen.,...&Chen, Shougang.(2023).Self-healing protective coating with dual reversible bonds triggered by photothermal responsive Co9S8@Bi2S3 hollow core-shell nanofillers.PROGRESS IN ORGANIC COATINGS,185,15.
MLA	Kang, Qianqian,et al."Self-healing protective coating with dual reversible bonds triggered by photothermal responsive Co9S8@Bi2S3 hollow core-shell nanofillers".PROGRESS IN ORGANIC COATINGS 185(2023):15.

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