腐蚀
涂层
复合数
材料科学
环境友好型
阳极
环氧树脂
复合材料
溶剂
化学工程
有机化学
化学
电极
物理化学
工程类
生物
生态学
作者
Dan Lin,Xiao Wang,Meng Zhang,Sicheng Yuan,Fei Xu,Di Bao,Huaiyuan Wang
标识
DOI:10.1016/j.compositesb.2022.109624
摘要
Environmentally friendly waterborne coatings have received significant attention recently due to their lower volatile organic compounds (VOCs) emission than solvent-based coatings, but their practical applications are severely limited by poor barrier properties. Herein, a novel and robust waterborne OBN-PA-Zn-D/WEP anti-corrosion composite coating was successfully fabricated by utilizing hydroxyl-functionalized h-BN (OBN) nanosheets, phytic acid (PA), Zn2+ and dicyandiamide. Due to the π-π interactions between OBN and organic-inorganic PA-Zn-D complex, the dispersibility of OBN-PA-Zn-D nanosheets was improved, which was beneficial for enhancing the physical barrier properties of OBN-PA-Zn-D/WEP composite coating. After adding dicyandiamide, the interface compatibility between OBN-PA-Zn-D nanosheets and the waterborne resin matrix was significantly improved, greatly reducing the defects inside the OBN-PA-Zn-D/WEP composite coating. In addition, PA and Zn2+ formed protective layer in the defect area to inhibit the corrosion of anode and cathode. Therefore, under the effect of multiple synergistic corrosion protections, the eco-friendly waterborne OBN-PA-Zn-D/WEP composite coating exhibited unique anti-corrosion performance that was greatly improved compared with the conventional waterborne epoxy coatings.
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