Polydopamine functionalized Ti3C2 MXene hybrid reinforced waterborne epoxy nanocomposites for enhancing anticorrosion coating application

作者：Qingsong Zhu, Xinyu Lei, Xiao-qin Zha, Saad Melhi, Juanna Ren, Ben Bin Xu, Siyu Hao, Baoji Miao, Huitan Fu, Mohammed A. Amin, Zeinhom M. El‐Bahy, Zhanhu Guo · 发表于：Ceramics International · 年份：2024 · DOI：10.1016/j.ceramint.2024.12.313 · 被引用次数：16 · 研究领域：MXene and MAX Phase Materials、Conducting polymers and applications、Advanced Sensor and Energy Harvesting Materials

2D MXene can prevent the penetration of corrosive media and can contribute to the improvement of corrosion resistance performance. However, achieving its uniform dispersion in the polymer matrix is challenging due to its large specific surface area and rapid aggregation. In this study, stable dispersion of polydopamine functionalized Ti 3 C 2 MXene (PDA-TM) hybrid in the waterborne epoxy (WEP) matrix was achieved via in-situ polymerization of the PDA layer on the surface of TM. The Fourier-transform infrared (FTIR) spectrum of PDA-TM showed the blue shift of O-H bond at 3438 cm −1 and the Ti-O bond of TM at 612 cm −1 . The characteristic peak of PDA-TM in the XRD pattern appeared at 2θ = 3.9° and the PDA bulge became smaller. Both proved the successful synthesis of PDA and TM. The surface wrinkles of the PDA-TM of SEM became more pronounced, and the smooth surface became rougher. This was due to the in-situ polymerization of DA on the surface of TM, which was conducive to avoid tight stacking of TM and expand its interlayer spacing. In addition, The WEP nanocomposite coating showed high impact resistance, strong adhesion, flexibility, and wear resistance. Moreover, PDA-TM decreased the glass transition temperature of WEP from 128.0 to 95.4 °C and improved the reflection loss for electromagnetic wave absorption properties. Furthermore, the |Z| 0.01Hz value of the PDA-TM 0.5 % (6.072 × 10 5 Ω cm 2 ) coating was approximately 6 times higher compared to that of the WEP coating af...