Understanding the multifunctional anticorrosion protective mechanism of epoxy-based coatings modified with hydrogel and benzotriazole conveying nanotubes for Q235 steel protection in 3.5 % NaCl

doi:10.1016/j.surfcoat.2024.130851

	Understanding the multifunctional anticorrosion protective mechanism of epoxy-based coatings modified with hydrogel and benzotriazole conveying nanotubes for Q235 steel protection in 3.5 % NaCl
	Njoku, Demian, I 1,2,3; Njoku, Annuncieta C.4; Udoh, Inime I.5; Uzoma, Paul C.4,6; Etim, Ini-Ibehe N.3,7,8; Li, Bowen 2; Li, Ying2
	2024-05-30
发表期刊	SURFACE & COATINGS TECHNOLOGY
ISSN	0257-8972
卷号	484 页码:16
通讯作者	Njoku, Demian, I([email protected]) ; Li, Ying([email protected])
摘要	Coatings with multiple protective properties are highly desired for anti -corrosion purposes as they overcome the limitations of conventional coatings that have limited functionality in field applications. Thus, this study describes the protective mechanisms of a new class of composite coatings fabricated by embedding benzotriazole (BTA) laden nanotubes prior-functionalized with interfacial wrappings of chitosan hydrogel (CTSH) entrapping excess crosslinking agents (glutaraldehyde (GTRA) or epichlorohydrin (EPIH)) in epoxy (E44) matrix cured with polyamide. The modification led to an improvement in the barrier and physical properties of the composite coatings and introduced shape -memory self -repairing capabilities. Long-term impedance spectroscopy (EIS) complemented with the physical property tests was employed to interrogate the improved barrier properties. The coatings ' microstructure and composition analyzed with SEM and EDS reveal the shape -memory self -repairing effect which was further characterized with overtime optical snapshots of samples exposed in a salt -spray chamber. The antibacterial functionality of the composite coatings against some marine bacteria ( Marinobacter aquaeolei and Marinobacter salsuginis ) was characterized using combined SEM and confocal laser scanning microscopy (CLSM). UV - visible spectrophotometry data reveal the pH -responsive release of the entrapped functional materials from the composite coatings. The experimental findings show that the new composite coatings exhibited intriguing triple -action protective functionalities and were more effective in protecting Q235 carbon steel exposed to 3.5 % NaCl compared to the conventional epoxy coating. This suggests that comparatively, the composite coatings have promising applications in structures that are exposed to sea environments.
关键词	Self -repairing Anti -bacterial Barrier coatings EIS CLSM Clay nanotubes Corrosion inhibition
DOI	10.1016/j.surfcoat.2024.130851
收录类别	SCI
语种	英语
资助项目	Institute of Metal Research Chinese Academy of Sciences; Hong Kong Metropolitan University
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Coatings & Films ; Physics, Applied
WOS记录号	WOS:001237999800001
出版者	ELSEVIER SCIENCE SA
WOS关键词	HALLOYSITE CLAY NANOTUBES ; CORROSION PROTECTION ; SMART COATINGS ; ANTIMICROBIAL ACTIVITY ; CHITOSAN ; RELEASE ; SURFACE ; PH ; ANTIBACTERIAL ; NANOPARTICLES
引用统计	被引频次：1[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/337002/186003
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Njoku, Demian, I; Li, Ying
作者单位	1.Hong Kong Metropolitan Univ, Sch Sci & Engn, Dept Appl Sci, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Corros & Protect Div, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Fed Univ Technol Owerri, Africa Ctr Excellence Future Energies & Electroch, Ihiagwa, Nigeria 4.Fed Univ Technol Owerri, Dept Polymer & Text Engn, Owerri, Nigeria 5.Tech Univ Denmark, Hempel Fdn Coatings Sci & Technol Ctr CoaST, Dept Chem & Biochem Engn, Soltofts Plads, DK-2800 Lyngby, Denmark 6.Zhejiang Univ, ZJU UIUC Inst, Int Campus, Haining 314400, Peoples R China 7.Chinese Acad Sci, Inst Oceanol, Key Lab Adv Marine Mat, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 8.Akwa Ibom State Univ, Dept Marine Biol, Marine Chem & Corros Res Grp, PMB 1167, Mkpat Enin, Nigeria
推荐引用方式 GB/T 7714	Njoku, Demian, I,Njoku, Annuncieta C.,Udoh, Inime I.,et al. Understanding the multifunctional anticorrosion protective mechanism of epoxy-based coatings modified with hydrogel and benzotriazole conveying nanotubes for Q235 steel protection in 3.5 % NaCl[J]. SURFACE & COATINGS TECHNOLOGY,2024,484:16.
APA	Njoku, Demian, I.,Njoku, Annuncieta C..,Udoh, Inime I..,Uzoma, Paul C..,Etim, Ini-Ibehe N..,...&Li, Ying.(2024).Understanding the multifunctional anticorrosion protective mechanism of epoxy-based coatings modified with hydrogel and benzotriazole conveying nanotubes for Q235 steel protection in 3.5 % NaCl.SURFACE & COATINGS TECHNOLOGY,484,16.
MLA	Njoku, Demian, I,et al."Understanding the multifunctional anticorrosion protective mechanism of epoxy-based coatings modified with hydrogel and benzotriazole conveying nanotubes for Q235 steel protection in 3.5 % NaCl".SURFACE & COATINGS TECHNOLOGY 484(2024):16.