Enhanced carbon nanotube fibers by polyimide

被引：46
作者：
Fang, Chao [1 ]
Zhao, Jingna [2 ]
Jia, Jingjing [1 ]
Zhang, Zuoguang [1 ]
Zhang, Xiaohua [2 ]
Li, Qingwen [2 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 18期
基金：
中国国家自然科学基金;
关键词：
MACROSCOPIC FIBERS; MECHANICAL-PROPERTIES; RAMAN-SPECTROSCOPY; COMPOSITE FIBERS; ARRAYS; YARNS; GROWTH; SPUN;
D O I：
10.1063/1.3511451
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The performance of carbon nanotube (CNT) fibers is limited by the intertube characteristics. Here we report a direct method of curing to improve mechanical properties of poly(amic acid)-infiltrated fibers. After curing at 190 degrees C for 60 min the fibers composed of double- and triple-walled CNTs, their strength is stably improved by 30.3%, from 1.58 to 2.06 GPa. The enhancement arises from the increase in shear stress between tube surfaces, by measuring the static frictional force of CNT fibers. Due to the existence of CNTs, the imidization temperature of polyimide drops greatly from 218 to 157 degrees C. (C) 2010 American Institute of Physics. [doi:10.1063/1.3511451]
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