Amino-functionalized Ti₃C₂T_x with anti-corrosive/wear function for waterborne epoxy coating

Han Yan¹，Meng Cai¹，Wen Li¹，Xiaoqiang Fan¹，Minhao Zhu^1,2

1. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University2. Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University

摘 要：Two-dimensional Ti₃C₂T_x flakes have great application potential in various areas due to their optical,electronic, electrochemical and mechanical properties, but their anti-corrosion and wear-resistance performance were not well understood. The difficulties in achieving good dispersity and interface interaction of inorganic additives in organic coatings hinder the incorporation of Ti₃C₂T_x into the epoxy coating. Here,few-layered Ti₃C₂T_x sheets with amino-functionalization were prepared, and as reinforced-additives were added into the waterborne epoxy coating. Anti-corrosion and tribological properties of as-prepared composite coatings were investigated in detail. The results reveal that the composite coating with 0.5 wt.% amino-functionalized Ti₃C₂T_x sheets shows excellent corrosion protection（the lowest frequency impedance was 3.12 × 10⁹ cm²） and wear resistance（wear rate was reduced by 72.74%）. The greatly improving performance of composite coatings mainly depends on:（a） good dispersity and compatibility of amino-functionalized Ti₃C₂T_x in organic matrix,（b） high adhesion strength between coating and metal substrate and（c） the intrinsic properties of Ti₃C₂T_x sheets. The work provides a good path for applications of MXene as multifunctional additives.

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