Effect of Acid Treatment on the Electrical Conductivity and Mechanical Properties of Carbon Nanotube Continuous Fibers 


Vol. 57,  No. 1, pp. 25-30, Feb.  2020
10.12772/TSE.2020.57.025


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  Abstract

Carbon nanotubes (CNTs) have been studied to fabricate continuous fibers or for assembly in various applications. However, the properties of CNT continuous fibers are not as advantageous as those of CNTs. In this study, CNT fibers produced by continuous spinning were subjected to acid treatment to improve the electrical conductivity and mechanical properties of the fibers. The CNT fibers were dipped into an acid mixture composed of sulfuric acid and nitric acid. The microstructures of the acid-treated CNT fibers were observed by scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS) was performed to confirm the surface functionalization of the acid-treated CNT fibers. The electrical conductivities of the acid-treated CNT fibers were determined by a 4-point probe method. The mechanical properties of the acid-treated CNT fibers were analyzed by a universal testing machine (UTM). The electrical conductivity of the acid-treated CNT fibers increased by 6.8 times and the tensile strength increased by 41% compared to the original CNT fibers.

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pISSN : 1225 - 1089
eISSN : 2288 - 6419

한국연구재단 우수등재학술지 유지 (2022년)