文献类型：期刊文献

英文题名：In situ synthesis and enhanced anti-corrosion properties of N-ZnO@polydopamine composite

作者：Wang, Feng-Rui[1];Ma, Yuan[1];Zhang, Wen-Jing[1];Sun, Hui-Ping[1];Zheng, Ruo-Yu[1];Liu, Jin-Ku[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Sichuan Univ Sci & Engn, Mat Corros & Protect Key Lab Sichuan Prov, Zigong 643000, Sichuan, Peoples R China

年份：2026

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20261920694310);WOS:【SCI-EXPANDED(收录号:WOS:001762539200001)】；

基金：The authors would like to thank the National Natural Science Foundation of China (Grant 22378124) and the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province (Grant 2023CL04) for their financial support.

语种：英文

外文关键词：Self-polymerization; Functional groups; Adhesion; Anti-corrosion

摘要：To address the poor dispersibility of conventional zinc oxide in anti-corrosion applications and optimize its band structure and electron capture efficiency, N-ZnO is employed as an active filler in this study. Subsequently, the biomimetic polydopamine (PDA) was successfully structured on nitrogen-doped zinc oxide (N-ZnO) by the in situ self-polymerization of dopamine (DA). The encapsulation of PDA has been confirmed by the analysis of phase structure, morphology, and surface properties. The electrochemical impedance spectroscopy (EIS) test indicated that an appropriate PDA layer can significantly improve the anti-corrosion performance of N-ZnO, among which the N-ZnO@PDA-1.05/epoxy resin coating showed the best anti-corrosion performance, exhibiting a 230.16% higher total impedance value than the blank/epoxy resin coating. The linear structured N-ZnO@PDA, which is bridged by the hydrogen bonding and conjugation effect between PDA, creates a "labyrinth effect" and prolongs the penetration path of corrosive media. The abundant reactive functional groups in PDA not only enable PDA to adhere to N-ZnO but also cross-link with epoxy resins, significantly enhancing the coating's barrier properties and structural compactness. Furthermore, PDA's potent chelating ability facilitates the rapid formation of PDA-Fe chelates once corrosion initiates, effectively repairing cracks and isolating damaged areas from the corrosive environment. This study provides new ideas and an experimental basis for the biomimetic modification of nanofillers and the design of high-performance intelligent anti-corrosion coatings.