【摘要】 纳米炭纤维表面包覆上金属铜,可获得新型纳米复合功能材料。研究了利用化学方法,以Cu2+为单质铜来源,锌粉为还原剂,不用贵重金属钯做催化剂,直接在硝酸处理后的纳米炭纤维上包覆铜的新方法。初步分析了镀液中加入引发剂T在纤维表面镀铜的机理;探讨了CuSO4·5H2O的用量、锌粉浓度、施镀温度、施镀时间、配位体种类、用量及引发剂等因素对纤维表面铜包覆层质量的影响,得到了优化的工艺条件:CuSO4·5H2O6.5g/L,锌粉1.7g/L,甘油133mL/L,乙二醇90mL/L,酒石酸钾钠8.5g/L,引发剂T3.5g/L,于室温下反应1h。SEM观察发现,纳米炭纤维表面包覆层较为均匀;EDS表征证实,包覆层确实为铜。更多还原

【Abstract】 A new technique for copper coating of nano-carbon fiber was developed based on chemical method. Thus copper coating was prepared on the nano-carbon fiber treated with nitric acid using metallic zinc as the reducer and Cu 2+ as the copper source in the absence of palladium catalyst. The influences of various plating parameters on the quality of the copper coating were investigated. The target copper coating was characterized by means of scanning electron microscopy and energy dispersive spectroscopy. As the results, the optimal plating bath was determined to be 6.5 g/L CuSO₄·5H₂O, 1.7 g/L zinc powder, 133 mL/L glycerol, 90 g/L glycol, 8.5 g/L potassium sodium tartate, and 3.5 g/L initiator T. And the optimal processing temperature and plating duration were suggested as room temperature and 1 hour, respectively. The target coating deposited on the nanocarbon fiber was uniform and composed of metallic copper.更多还原