Strain Sensing Using Multiwalled Carbon Nanotube Film Subjected to Temperature Variation

Abstract

In this study, the real time strain response of the Multiwalled Carbon Nanotube (MWCNT) film is studied at macroscale experimentally. The response of the MWCNT film to temperature changes is also presented in the study. The MWCNT film is attached to a brass specimen using vacuum bonding, and the brass specimen is subjected to tensile load and voltage output from MWCNT film is obtained using four-point probe and a sensitive voltage measurement device. Experimental results demonstrate a linear relationship between change in voltage across the film and change in strain in the brass specimen when subjected to tensile load. The MWCNT film also exhibited excellent reversible electromechanical characteristics when the specimen was unloaded. The response of the MWCNT film to temperature is also studied and it is observed that the resistance of the MWCNT film decreased upon heating. The MWCNT film exhibited a stable and linear voltage response to changes in temperature. The experimental results demonstrate the effectiveness of Multiwalled carbon nanotubes in strain sensing as well as the effect of temperature on the MWCNT film.