Epoxy-based smart coating with self-repairing polyurea-formaldehyde microcapsules for anticorrosion protection of aluminum alloy AA2024

doi:10.1007/s11998-020-00334-3

IMR OpenIR

	Epoxy-based smart coating with self-repairing polyurea-formaldehyde microcapsules for anticorrosion protection of aluminum alloy AA2024
	Njoku, Chigoziri N.1,2,3; Bai, Weichen 1,4; Arukalam, Innocent O.1,5; Yang, Lihui 6,7; Hou, Baorong 6,7; Njoku, Demian I.1; Li, Ying 1,8
通讯作者	Njoku, Demian I.(demian@imr.ac.cn) ; Li, Ying(liying@imr.ac.cn)
	2020-03-24
发表期刊	JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
ISSN	1547-0091
卷号	17 期号:3 页码:17
摘要	Self-reparable microcapsules which can repair microcracks in the coating matrix and effectively inhibit the corrosion at the substrate/coating interface during service have been evaluated. The main objective was to fabricate an innovative pH-responsive permeability-switching polyurea-formaldehyde (PUF)-based microcapsule laden with 8-hydroxyquinoline (8-HQ) as the core material for the production of smart epoxy coating for the long-term protection of Al alloys. Combined improved barrier, active, and self-repairing properties indicating sort of triple-action corrosion mitigating ability of the modified epoxy-based smart coating was demonstrated by electrochemical impedance spectroscopy and scanning electron microscopy. The results indicate that the self-repairing action occurs via two mechanisms: firstly, by the initiation of chain mobility at the modified coating defects on heat treatment. Secondly, by the crosslinking of the swelled hydrogel present in the PUF shell wall via the various polymer-polymer interactions. The active corrosion protection was due to the (smart) pH response-release ability of the encapsulated inhibitor (8-HQ) with an increase in corrosion degree. Meanwhile, the even dispersal of the fabricated microcapsule with its intrinsic rough surface in the epoxy coating matrix contributed to the improved barrier and adhesive properties.
关键词	Aluminum AA2024 alloy Microcapsule Self-healing coating Smart coating
资助者	National Natural Science Fund of China ; National Natural Science Research Fund for International Young Scientists ; Research Fund of Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology (Qingdao) ; Institute of Metal Research and University of Chinese Academy of Sciences
DOI	10.1007/s11998-020-00334-3
收录类别	SCI
语种	英语
资助项目	National Natural Science Fund of China[51871227] ; National Natural Science Research Fund for International Young Scientists[51650110506] ; Research Fund of Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology (Qingdao) ; Institute of Metal Research and University of Chinese Academy of Sciences
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Applied ; Materials Science, Coatings & Films
WOS记录号	WOS:000521660100001
出版者	SPRINGER
引用统计	被引频次：36[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/137990
专题	中国科学院金属研究所
通讯作者	Njoku, Demian I.; Li, Ying
作者单位	1.Chinese Acad Sci, Corros & Protect Div, Inst Met Res, 62 Wencui Rd, Shenyang 110016, Peoples R China 2.UCAS, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Fed Univ Technol Owerri, Dept Chem Engn, PMB 1526, Owerri, Nigeria 4.Univ Sci & Technol China, Sch Mat Sci & Technol, 96 Jin Zhai Rd, Hefei 230026, Anhui, Peoples R China 5.Fed Univ Technol Owerri, Dept Polymer & Text Engn, PMB 1526, Owerri, Nigeria 6.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 7.Pilot Natl Lab Marine Sci & Technol, Open Studio Marine Corros & Protect, Qingdao 266237, Peoples R China 8.Northeastern Univ, Shenyang Natl Lab Mat Sci, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Njoku, Chigoziri N.,Bai, Weichen,Arukalam, Innocent O.,et al. Epoxy-based smart coating with self-repairing polyurea-formaldehyde microcapsules for anticorrosion protection of aluminum alloy AA2024[J]. JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH,2020,17(3):17.
APA	Njoku, Chigoziri N..,Bai, Weichen.,Arukalam, Innocent O..,Yang, Lihui.,Hou, Baorong.,...&Li, Ying.(2020).Epoxy-based smart coating with self-repairing polyurea-formaldehyde microcapsules for anticorrosion protection of aluminum alloy AA2024.JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH,17(3),17.
MLA	Njoku, Chigoziri N.,et al."Epoxy-based smart coating with self-repairing polyurea-formaldehyde microcapsules for anticorrosion protection of aluminum alloy AA2024".JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH 17.3(2020):17.