Self-Healing Coatings Containing Core-Shell Nanofibers with pH-Responsive Performance

doi:10.1021/acsami.0c18933

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Self-Healing Coatings Containing Core-Shell Nanofibers with pH-Responsive Performance
	Wang, Qi 3; Wang, Wei 3; Ji, Xiaohong 1; Hao, Xiangping 2; Ma, Chengcheng 3; Hao, Wei 3; Li, Xinglinmao 3; Chen, Shougang 3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2021-01-20
卷号	13 期号:2 页码:3139-3152
关键词	self-healing core-shell nanofibers electrospinning electrochemical measurements corrosion
ISSN号	1944-8244
DOI	10.1021/acsami.0c18933
通讯作者	Wang, Wei(wangwei8038@ouc.edu.cn) ; Chen, Shougang(sgchen@ouc.edu.cn)
英文摘要	The micro-nanofibers prepared by the electrospinning technique can be used as a good container for loading healing agents. The core-shell electrospun nanofibers with polyacrylonitrile as the outer shell and tannic acid (TA) and tung oil as the core healing agents were synthesized by a coaxial electrospinning method and exhibited pH-sensitive ability. The nanofibers as additives were added to an epoxy resin coating as a self-healing coating. The morphological stability of the electrospun nanofibers were observed by a scanning electron microscope and a transmission electron microscope. Fourier transform infrared spectroscopy and fluorescence microscopy reveal that the successful synthesis and uniform distribution of core-shell fibers. The mechanical properties test revealed that the tensile properties of the coating could be improved by adding nanofibers. The infrared mapping test, energy-dispersive spectrometry, and X-ray photoelectron spectroscopy, which were carried out on the scratched part of the coating, proved the release of the healing agent in the damaged part. TA forms a protective film on the exposed metal surface through molecular adsorption under acidic conditions. Meanwhile, the curing of tung oil can effectively compensate into the microcracks to form a TA protective film, which could improve the self-healing performance. As the tung oil dries and solidifies in the alkaline solution, the cross-linking effect of the molecules is combined to form a tight film and strength the self-healing ability. TA as an acidic healing agent and tung oil as an alkaline healing agent played the role of pH-sensitive products in healing the cracked coating. The self-healing rates of coating immersing in 3.5 wt % acidic NaCl solution and alkaline solution were 81.6 and 71.2%, respectively. The composite coating shows a great pH-sensitive self-healing ability to heal the cracked coating.
资助项目	National Natural Science Foundation of China[42076039] ; Natural Science Foundation of Shandong Province[ZR2020ME016] ; National Natural Science Foundation[U1806223] ; Fundamental Research Funds for the Central Universities[201912032] ; Fundamental Research Funds for the Central Universities[201965009] ; Fundamental Research Funds for the Central Universities[201964009]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000612551400094
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/169736]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Wang, Wei; Chen, Shougang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 2.Univ Sci & Technol Beijing, Natl Mat Corros & Protect Data Ctr, Inst Adv Mat & Technol, Beijing 100083, Peoples R China 3.Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qi,Wang, Wei,Ji, Xiaohong,et al. Self-Healing Coatings Containing Core-Shell Nanofibers with pH-Responsive Performance[J]. ACS APPLIED MATERIALS & INTERFACES,2021,13(2):3139-3152.
APA	Wang, Qi.,Wang, Wei.,Ji, Xiaohong.,Hao, Xiangping.,Ma, Chengcheng.,...&Chen, Shougang.(2021).Self-Healing Coatings Containing Core-Shell Nanofibers with pH-Responsive Performance.ACS APPLIED MATERIALS & INTERFACES,13(2),3139-3152.
MLA	Wang, Qi,et al."Self-Healing Coatings Containing Core-Shell Nanofibers with pH-Responsive Performance".ACS APPLIED MATERIALS & INTERFACES 13.2(2021):3139-3152.