Comprehensive Characterization of Structural, Electrical, and Mechanical Properties of Carbon Nanotube Yarns Produced by Various Spinning Methods.

Takayuki Watanabe,Toshiya Okazaki,Kazufumi Kobashi,Shun Muroga,Takahiro Morimoto,Satoshi Yamashita,Satoshi Yamazaki,Takumi Inaba

doi:10.3390/nano12040593

Abstract

A comprehensive characterization of various carbon nanotube (CNT) yarns provides insight for producing high-performance CNT yarns as well as a useful guide to select the proper yarn for a specific application. Herein we systematically investigate the correlations between the physical properties of six CNT yarns produced by three spinning methods, and their structures and the properties of the constituent CNTs. The electrical conductivity increases in all yarns regardless of the spinning method as the effective length of the constituent CNTs and the density of the yarns increase. On the other hand, the tensile strength shows a much stronger dependence on the packing density of the yarns than the CNT effective length, indicating the relative importance of the interfacial interaction. The contribution of each physical parameter to the yarn properties are quantitatively analyzed by partial least square regression.

Highlights

Carbon nanotubes (CNTs) display very high electrical conductivities, thermal conductivities, as well as mechanical strengths, and sorption abilities [1,2,3,4,5]
We here conducted comprehensive characterizations of six CNT yarns produced by the different spinning methods with various CNTs
CNTs such as diameter, wall number, and effective length were characterized by transmission electron microscopy (TEM), resonance Raman, and FIR spectroscopy

Summary

Introduction

Carbon nanotubes (CNTs) display very high electrical conductivities, thermal conductivities, as well as mechanical strengths, and sorption abilities [1,2,3,4,5]. Because they have lower densities than metals such as copper and steel [6], CNTs have potential as alternatingcurrent power cables and wires. Their estimated electrical conductivity is as high as. Macroscopic CNT yarns show an electrical conductivity and tensile strength of 10,900 S/cm and 9.6 GPa, respectively [13,14,15]

Methods

Results

Conclusion