Polymer Coating of Carbon Nanotube Fibers for Electric Microcables.
Polymer Coating of Carbon Nanotube Fibers for Electric Microcables.
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DOI：
10.3390/nano4040879
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发表时间：
2014-11-04
期刊：
影响因子：
--
通讯作者：
Shanov V
中科院分区：
文献类型：
--
作者：
Alvarez NT;Ochmann T;Kienzle N;Ruff B;Haase MR;Hopkins T;Pixley S;Mast D;Schulz MJ;Shanov V
碳纳米管(CNTs)被认为是最有希望在电气、机械和热学领域取代铜和铝的候选材料。尽管大多数碳纳米管的工业应用需要宏观和微米尺寸的碳纳米管纤维组件，但迄今为止已经报道了几种制造导电碳纳米管纤维、线、纱线和绳索的技术，并且它们的电气和机械导电性的改善仍在继续。这些碳纳米管导电纤维的某些电气应用需要绝缘层来进行电绝缘和防止机械撕裂。理想情况下，碳纳米管纤维上的柔性绝缘体，如氢化丁二烯橡胶(HNBR)，可以制造碳纳米管线圈，这些线圈可以组装成轻质、耐腐蚀的电机和变压器。HNBR是一种广泛使用的商用聚合物，与聚氯乙烯(PVC)等其他电缆涂层聚合物不同，它在碳纳米管纤维上提供独特的连续和均匀的涂层。聚合物涂层/绝缘碳纳米管纤维的平均直径为26.54μm--大约是红细胞直径的四倍--是通过简单的浸涂工艺生产的。我们的结果证实，溶液中的HNBR在用作导电核心的碳纳米管纤维上产生了几微米的均匀绝缘和机械保护。
Carbon nanotubes (CNTs) are considered the most promising candidates to replace Cu and Al in a large number of electrical, mechanical and thermal applications. Although most CNT industrial applications require macro and micro size CNT fiber assemblies, several techniques to make conducting CNT fibers, threads, yarns and ropes have been reported to this day, and improvement of their electrical and mechanical conductivity continues. Some electrical applications of these CNT conducting fibers require an insulating layer for electrical insulation and protection against mechanical tearing. Ideally, a flexible insulator such as hydrogenated nitrile butadiene rubber (HNBR) on the CNT fiber can allow fabrication of CNT coils that can be assembled into lightweight, corrosion resistant electrical motors and transformers. HNBR is a largely used commercial polymer that unlike other cable-coating polymers such as polyvinyl chloride (PVC), it provides unique continuous and uniform coating on the CNT fibers. The polymer coated/insulated CNT fibers have a 26.54 μm average diameter—which is approximately four times the diameter of a red blood cell—is produced by a simple dip-coating process. Our results confirm that HNBR in solution creates a few microns uniform insulation and mechanical protection over a CNT fiber that is used as the electrically conducting core.