A high-performance waterborne polymeric composite coating with long-term anti-corrosive property based on phosphorylation of chitosan-functionalized Ti3C2Tx MXene

• Published in: Advanced composites and hybrid materials 2022-09, Vol.5 (3), p.1699-1711
• Main Authors: He, Xiaoling, Li, Sihao, Shen, Rongbiao, Ma, Yanqi, Zhang, Li, Sheng, Xinxin, Chen, Ying, Xie, Delong, Huang, Jintao
• Format: Article
• Language: English
• Subjects: Ceramics; Chemistry and Materials Science; Composites; Glass; Materials Engineering; Materials Science; Natural Materials; Original Research; Polymer Sciences
• ISSN: 2522-0128; 2522-0136
• DOI: 10.1007/s42114-021-00392-0

As a newly discovered two-dimensional (2D) material, MXene has attracted much attention because of its fascinating physicochemical properties. However, the issue of agglomeration has limited its application in anti-corrosive polymeric coatings. Herein, a novel nanofiller, phosphoric acid-modified chitosan (mCS)-functionalized MXene (fMX), has been successfully constructed and used to endow waterborne epoxy (WEP) coatings with brilliant corrosive resistance. Electrochemical results demonstrate that the | Z 0.01 Hz | value for 0.2 wt% fMX/WEP composite coating (4.73 × 10 7 Ω cm 2 ) is more than two orders of magnitude higher than that of the blank WEP (2.09 × 10 5 Ω cm 2 ) and the corrosion current density value of 0.2 wt% fMX/WEP maintains above 5.44 × 10 −9 A/cm 2 after soaking in 3.5 wt% NaCl solution for 50 days. It is nearly two orders lower than that of blank WEP (5.23 × 10 −7 A/cm 2 ). Thus, this novel mCS-functionalized MXene can serve as an effective composite nanofiller for preparing MXene-based high-performance anti-corrosive coatings. Graphical abstract Phosphorylated chitosan-functionalized MXene (fMX)-based polymeric composite coatings have excellent long-term anti-corrosive property.