Strengthening and toughening effects by strapping carbon nanotube cross-links with polymer molecules

被引：34

作者：

Zou, Jingyun ^{[1
,2
]}

Zhang, Xiaohua ^{[2
]}

Zhao, Jingna ^{[2
]}

Lei, Chaoshuai ^{[2
]}

Zhao, Yonghao ^{[1
]}

Zhu, Yuntian ^{[1
,3
]}

Li, Qingwen ^{[2
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nano Struct Mat Ctr, Xiaolingwei St 200, Nanjing 210094, Jiangsu, Peoples R China

[2] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Key Lab Nanodevices & Applicat, Ruoshui Rd 398, Suzhou 215123, Peoples R China

[3] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2016年 / 135卷

基金：

中国国家自然科学基金;

关键词：

Carbon nanotube fiber; Strengthening; Toughening; Cross-link; Strapping; MECHANICAL-PROPERTIES; FIBERS;

D O I：

10.1016/j.compscitech.2016.09.019

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Cross-linked carbon nanotube (CNT) networks provide efficient load and charge transfer within their assemblies. Injection chemical vapor deposition (iCVD) has been widely used to obtain such structure with rich cross-links. However, in the iCVD process, a certain organic by-products, probably dioctyl phthalate (DOP) molecules, co-exist in the CNT network, which degrade the interfacial property between CNTs. The removal of the DOP-like molecules can remarkably strengthen the CNT cross-links, improving the assembly's modulus, but it also causes significant loss in toughness. Here we report that strapping up the strengthened cross-links with long-chain and inherently polar polymer polyvinylidene fluoride (PVDF) can result in a simultaneous strengthening and toughening of CNT assemblies, e.g. CNT fibers. This finding represents a new strategy to develop advanced CNT-based macroscopic assembly materials. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：123 / 127

页数：5

共 25 条

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