目的 解决铜尾矿(CT)堆积对生态环境的严重影响，探索改性铜尾矿作为增强填料在PP/EVA 共混物中的高效利用。方法 使用硅烷偶联剂KH550、KH560和KH570对铜尾矿进行表面改性以改善其疏水性，评估不同偶联剂改性铜尾矿填充对复合材料力学性能和热性能的影响，并通过SEM分析改性铜尾矿在复合材料中的分散情况及与基体的界面结合情况。结果 KH570改性的铜尾矿复合材料拉伸强度达到17.23 MPa、弯曲强度达到28.06 MPa、缺口冲击强度达到15.31 kJ/m²，热稳定性显著提高，最大降解温度tmax为498 ℃，且SEM显示改性铜尾矿在复合材料中分散均匀，与树脂基体界面结合良好，应力集中现象减少。结论 研究结果为废弃铜尾矿的高效利用提供了新思路，为其在树脂基复合材料中的应用奠定了基础，实现了对铜尾矿高效利用的研究目标。

The work aims to address the serious impact of copper tailings (CT) accumulation on the ecological environment and explore the high-efficiency utilization of modified copper tailings as reinforcing fillers in PP/EVA blends.Silane coupling agents KH550, KH560 and KH570 were used to modify the surface of copper tailings to improve their hydrophobicity. The effects of different modified copper tailings filling on the mechanical and thermal properties of the composites were evaluated, and the dispersion of modified copper tailings in the composites and the interface bonding with the matrix were analyzed by SEM. In the copper tailings composites modified by KH570, the tensile strength reached 17.23 MPa, the flexural strength reached 28.06 MPa, and the notched impact strength reached 15.31 kJ/m2. The thermal stability was significantly improved, with the maximum degradation temperature (tmax) of 498 °C. Moreover, SEM showed that the modified copper tailings were evenly dispersed in the composites. It had good interface bonding with the resin matrix, and the stress concentration phenomenon was reduced. In conclusion, the research results provide new ideas for the high-efficiency utilization of waste copper tailings and lay a foundation for their application in resin-based composites, achieving the research goal of high-efficiency utilization of copper tailings.