The mechanical and electrical properties of direct-spun carbon nanotube mats

被引：68

作者：

Stallard, J. C. ^{[1
]}

Tan, W. ^{[1
]}

Smail, F. R. ^{[1
]}

Gspann, T. S. ^{[2
]}

Boies, A. M. ^{[1
]}

Fleck, N. A. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Engn, Trumpington St, Cambridge CB2 1PZ, England

[2] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

来源：

EXTREME MECHANICS LETTERS | 2018年 / 21卷

基金：

英国工程与自然科学研究理事会;

关键词：

Carbon nanotube mat; Mechanical properties; In-situ testing; Nanotube bundles; CHEMICAL-VAPOR-DEPOSITION; FIBERS; CONDUCTIVITY; CAPACITY; STRENGTH; BUNDLES; ROPES;

D O I：

10.1016/j.eml.2018.03.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The mechanical and electrical properties of a direct-spun carbon nanotube mat are measured. The mat comprises an interlinked random network of nanotube bundles, with approximately 40 nanotubes in a bundle. A small degree of in-plane anisotropy is observed. The bundles occasionally branch, and the mesh topology resembles a 2D lattice of nodal connectivity slightly below 4. The macroscopic in-plane tensile response is elasto-plastic in nature, with significant orientation hardening. In-situ microscopy reveals that the nanotube bundles do not slide past each other at their junctions under macroscopic strain. A micromechanical model is developed to relate the macroscopic modulus and flow strength to the longitudinal shear response of the nanotube bundles. The mechanical and electrical properties of the mat are compared with those of other nanotube arrangements over a wide range of density. (C) 2018 The Authors. Published by Elsevier Ltd.

引用

页码：65 / 75

页数：11

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