{"title":"聚多巴胺功能化石墨氮化碳纳米片作为 2-巯基苯并咪唑的酸刺激响应纳米载体用于智能防腐涂料","authors":"","doi":"10.1016/j.porgcoat.2024.108782","DOIUrl":null,"url":null,"abstract":"<div><p>Waterborne epoxy (EP) is considered a promising environmentally friendly anticorrosive technology with extensive potential applications. However, its limited anticorrosive ability poses significant challenges in practical usage. In this study, we use dopamine (DA) polymerization to load 2-mercaptobenzimidazole (MBI) onto the surface of g-C<sub>3</sub>N<sub>4</sub> (CN) nanosheets, resulting in the synthesis of MBI-PDA@g-C<sub>3</sub>N<sub>4</sub> (MBI-PDA@CN) nanosheet composites. The MBI-PDA@CN composite exhibits favorable hydrophilicity and high loading capacity of 35.8 %, enabling the formation of compact bonding layer at the interface with the EP. Simultaneously, the MBI-PDA@CN nanosheets exhibit a fully lamellar structure, thereby effectively impeding the infiltration of corrosive agents. Electrochemical tests show that the coating resistance (<em>R</em><sub>p</sub>) of MBI-PDA@CN/EP coating (8.5 × 10<sup>7</sup> Ω cm<sup>2</sup>) exhibited a significantly higher magnitude compared to that of the EP (2.6 × 10<sup>6</sup> Ω cm<sup>2</sup>) after being immersed in 3.5 wt% NaCl solution for 30 days. It is worth mentioning that the MBI-PDA@CN nanosheets possess the capability to gradually release MBI-PDA molecules in acidic environments. Given that MBI and PDA function as outstanding metal corrosion inhibitors, they substantially augment the corrosion resistance of the coating in acidic conditions. This study presents an intriguing approach to fabricating robust corrosion-resistant composite coatings.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Polydopamine functionalized graphitic carbon nitride nanosheets as acid stimuli-responsive nanocarrier of 2-mercaptobenzimidazole for intelligent anticorrosion coatings\",\"authors\":\"\",\"doi\":\"10.1016/j.porgcoat.2024.108782\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Waterborne epoxy (EP) is considered a promising environmentally friendly anticorrosive technology with extensive potential applications. However, its limited anticorrosive ability poses significant challenges in practical usage. In this study, we use dopamine (DA) polymerization to load 2-mercaptobenzimidazole (MBI) onto the surface of g-C<sub>3</sub>N<sub>4</sub> (CN) nanosheets, resulting in the synthesis of MBI-PDA@g-C<sub>3</sub>N<sub>4</sub> (MBI-PDA@CN) nanosheet composites. The MBI-PDA@CN composite exhibits favorable hydrophilicity and high loading capacity of 35.8 %, enabling the formation of compact bonding layer at the interface with the EP. Simultaneously, the MBI-PDA@CN nanosheets exhibit a fully lamellar structure, thereby effectively impeding the infiltration of corrosive agents. Electrochemical tests show that the coating resistance (<em>R</em><sub>p</sub>) of MBI-PDA@CN/EP coating (8.5 × 10<sup>7</sup> Ω cm<sup>2</sup>) exhibited a significantly higher magnitude compared to that of the EP (2.6 × 10<sup>6</sup> Ω cm<sup>2</sup>) after being immersed in 3.5 wt% NaCl solution for 30 days. It is worth mentioning that the MBI-PDA@CN nanosheets possess the capability to gradually release MBI-PDA molecules in acidic environments. Given that MBI and PDA function as outstanding metal corrosion inhibitors, they substantially augment the corrosion resistance of the coating in acidic conditions. This study presents an intriguing approach to fabricating robust corrosion-resistant composite coatings.</p></div>\",\"PeriodicalId\":20834,\"journal\":{\"name\":\"Progress in Organic Coatings\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2024-09-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Progress in Organic Coatings\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0300944024005745\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Organic Coatings","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0300944024005745","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Polydopamine functionalized graphitic carbon nitride nanosheets as acid stimuli-responsive nanocarrier of 2-mercaptobenzimidazole for intelligent anticorrosion coatings
Waterborne epoxy (EP) is considered a promising environmentally friendly anticorrosive technology with extensive potential applications. However, its limited anticorrosive ability poses significant challenges in practical usage. In this study, we use dopamine (DA) polymerization to load 2-mercaptobenzimidazole (MBI) onto the surface of g-C3N4 (CN) nanosheets, resulting in the synthesis of MBI-PDA@g-C3N4 (MBI-PDA@CN) nanosheet composites. The MBI-PDA@CN composite exhibits favorable hydrophilicity and high loading capacity of 35.8 %, enabling the formation of compact bonding layer at the interface with the EP. Simultaneously, the MBI-PDA@CN nanosheets exhibit a fully lamellar structure, thereby effectively impeding the infiltration of corrosive agents. Electrochemical tests show that the coating resistance (Rp) of MBI-PDA@CN/EP coating (8.5 × 107 Ω cm2) exhibited a significantly higher magnitude compared to that of the EP (2.6 × 106 Ω cm2) after being immersed in 3.5 wt% NaCl solution for 30 days. It is worth mentioning that the MBI-PDA@CN nanosheets possess the capability to gradually release MBI-PDA molecules in acidic environments. Given that MBI and PDA function as outstanding metal corrosion inhibitors, they substantially augment the corrosion resistance of the coating in acidic conditions. This study presents an intriguing approach to fabricating robust corrosion-resistant composite coatings.
期刊介绍:
The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as:
• Chemical, physical and technological properties of organic coatings and related materials
• Problems and methods of preparation, manufacture and application of these materials
• Performance, testing and analysis.