| Epoxy-based smart coating with self-repairing polyurea-formaldehyde microcapsules for anticorrosion protection of aluminum alloy AA2024 | |
| Njoku, Chigoziri N.1,2,3; Bai, Weichen1,4; Arukalam, Innocent O.1,5; Yang, Lihui6,7; Hou, Baorong6,7; Njoku, Demian I.1; Li, Ying1,8 | |
| Corresponding Author | Njoku, Demian I.(demian@imr.ac.cn) ; Li, Ying(liying@imr.ac.cn) |
| 2020-03-24 | |
| Source Publication | JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
 |
| ISSN | 1547-0091 |
| Volume | 17Issue:3Pages:17 |
| Abstract | 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. |
| Keyword | Aluminum AA2024 alloy Microcapsule Self-healing coating Smart coating |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Chemistry ; Materials Science |
| WOS Subject | Chemistry, Applied ; Materials Science, Coatings & Films |
| WOS ID | WOS:000521660100001 |
| Publisher | SPRINGER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/137990 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Njoku, Demian I.; Li, Ying |
| Affiliation | 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 |
| Recommended Citation 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. |
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