铜基碳纳米管复合薄膜载流性能分析

doi:10.16085/j.issn.1000-6613.2018-0226

摘要/Abstract

摘要： 碳纳米管和铜纳米线的纳米复合膜兼具铜纳米线的电学性能与碳纳米管的力学性能，合适配比的复合膜具有优良的电学性能，对于金属基复合材料的研究具有重要意义。理论上复合材料的电学性能主要受复合成分和成分配比的影响最大。本文利用单一变量法，在铜纳米线的导电性能提升上，分析了反应时间、NaOH纯度、乙二胺含量以及水浴反应温度等对生成铜纳米线长径比的影响；在碳纳米管的导电性能增加上，分析了烧结温度、匀质、退火还原及机械压制对碳纳米管电学性能的影响。利用优化后碳纳米管与铜纳米线制备了一系列不同配比的CuNWs/CNTs复合薄膜，对复合薄膜的电学性能进行实验论证。结果表明：当反应时间为1h、NaOH为分析纯、乙二胺含量为1mL及水浴温度为70℃时，铜纳米线的导电性最佳；当烧结温度为常温、匀质压力500MPa、连续匀质3次、退火温度500℃、保温时间1h、压制力6N、压制时间10min时，碳纳米管的导电性最佳；当CuNWs体积分数为49.04%时，复合薄膜导电性能最佳，载流性能最好，分别达到9.58×10^-5Ω·m和159.09A/cm²。

关键词: 铜纳米线, 碳纳米管, 复合膜, 导电性, 载流性能

Abstract: The nano-composite films of carbon nanotubes and copper nanowires combine the electrical properties of copper nanowires with the mechanical properties of carbon nanotubes. The composite film with proper ratio of carbon nanotubes and copper nanowire has excellent electrical properties, which is important for metal matrix composites. Theoretically, the electrical properties of composites are mainly affected by the composite composition and the distribution ratio. Using the single-variable method, we analyzed the influence of reaction time, NaOH purity, ethylenediamine content and water bath reaction temperature on the aspect ratio of the copper nanowires. The conductivity of the carbon nanotubes was also investigated. The effects of sintering temperature, homogenization, annealing and mechanical pressing on the electrical properties of the carbon nanotubes were analyzed. A series of CuNWs/CNTs composite films with different ratios were prepared from the optimized carbon nanotubes and copper nanowires, and the electrical properties of the composite films were experimentally demonstrated. The results showed that when the reaction time was 1h, NaOH was of analytical grade, the ethylenediamine content was 1mL and the water bath temperature was 70℃, the copper nanowires showed the best conductivity. The carbon nanotubes showed the best conductivity when the sintering temperature was room temperature, the homogeneous pressure was 500MPa, the quality was 3 times, the annealing temperature was 500℃, the holding time was 1h, the pressing force was 6N, and the pressing time was 10min. When the CuNWs volume fraction was 49.04%, the composite film had the highest conductivity and current carrying capacity, which reached 9.58×10^-5Ω·m and 159.09A/cm², respectively.

Key words: copper nanowires, carbon nanotubes, composite membrane, electrical conductivity, current carrying capacity

中图分类号:

TB333

刘璇, 李必奎, 李明, 王鹏波. 铜基碳纳米管复合薄膜载流性能分析[J]. 化工进展, 2018, 37(12): 4782-4790.

LIU Xuan, LI Bikui, LI Ming, WANG Pengbo. Analysis of the current-carrying capacity of copper-based carbon nanotube composite films[J]. Chemical Industry and Engineering Progress, 2018, 37(12): 4782-4790.

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