High-strength composite yarns derived from oxygen plasma modified super-aligned carbon nanotube arrays

作     者：Haoming Wei Yang Wei Yang Wu Liang Liu Shoushan Fan Kaili Jiang 

作者机构：Department of Physics & Tsinghua-Eoxconn Nanotechnology Research Center Tsinghua University Beijing 100084 China Department of Materials Science and Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2013年第6卷第3期

页      面：208-215页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080401[工学-精密仪器及机械] 080501[工学-材料物理与化学] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：financially supported by the National Basic Research Program of China 国家自然科学基金 

主　　题：carbon nanotube yarns super-aligned carbonnanotube array 02 plasma mechanical properties 

摘      要：Spinning carbon nanotube （CNT） yarns from super-aligned carbon nanotube （SACNT） arrays is a promising approach to fabricate high-strength fibers. However the reported tensile strengths of the as-prepared fibers are far below that of an individual CNT. It is therefore still a challenge to improve their mechanical strengths. Here we report that the tensile strengths and Young＇s moduli can be further improved to 2.2 GPa and 200 GPa respectively, if we first treat the SACNT array with oxygen plasma by using a reactive ion etching （RIE） facility, then dry spin yarns from it and make composite fibers with polyvinyl alcohol. According to the experimental results obtained using scanning electron microscopy （SEM）, Raman spectroscopy and X-ray photoelectron spectroscopy （XPS）, the improvement is attributed to the oxygen RIE process, as it can create functional groups on the outer walls of CNTs and thus improve the interaction between the CNTs and the polymer molecules.