Mechanical test method and properties of a carbon nanomaterial with a high aspect ratio.

Sang Koo Jeon,Oh Heon Kwon,Seung Hoon Nahm,Hoon-Sik Jang

doi:10.1186/s40580-016-0089-3

Abstract

Superior nanomaterials have been developed and applied to many fields, and improved characteristic of nanomaterials have been studied. Measurement of the mechanical properties for nanomaterials is important to ensure the reliability and predict the service life times of products containing nanomaterials. However, it is challenging to measure the mechanical properties of nanomaterials due to their very small dimensions. Moreover, macro-scale measurement systems are not suitable for use with nanomaterials. Therefore, various methods have been developed and used to in an effort to measure the mechanical properties of nanomaterials. This paper presents a review of various evaluation systems and the measurement methods which are used to determine the mechanical properties of carbon nanotube (CNT) and carbon nanofiber (CNF), representatively. In addition, we measured the tensile strength and elastic modulus of the CNT and CNF in the scanning electron microscope (SEM) installed the nano-manipulator and the force sensor and this measurement system and results would be introduced in detail.

Highlights

The nanotechnology has grown significantly over time and will continue to grown in the future
We reported that a tensile test was conducted to measure the elastic modulus and tensile stress of multi-walled carbon nanotube (MWCNT) [79, 80]
Beese et al [87] performed a tensile test of carbon nanofiber (CNF) using a nano-tensile stage which served to measure the mechanical properties of carbon nanotube (CNT) in transmission electron microscope (TEM), where the fracture mechanism was observed in detail

Summary

Introduction

The nanotechnology has grown significantly over time and will continue to grown in the future. The concepts which apply to the measurement of bulk materials are identical to those which apply to the measurement of nanomaterials, but the measurement of nanomaterials is very difficult, as nanomaterials cannot be controlled or be gripped with the hands and because loads and the strain levels at the nano level cannot be measured. For these reasons, a new system capable of measuring the mechanical properties of nanomaterials is needed. Mechanical testing methods for CNT and CNF are reviewed and compared with each researches

Review

Mechanical properties and measurement method for carbon nanotube

Mechanical properties and measurement method for carbon nanofiber

Conclusions