Accurate measurement of pitch-based carbon fiber electrical resistivity

Abstract

This study investigated the appropriate methodology required to measure single carbon fibers electrical resistivity. Twoand four-probe methods were evaluated for this measurement. Comparing results for single filaments of pitch-based and PAN-based fibers shows that the two-probe method gives acceptable results for PAN-based fibers, but much higher deviations from adjusted resistivity for pitch-based fibers (>15%). The four-probe method shows small deviations (<1%) for both precursors and is the most suitable for measurements of pitch-based carbon fibers. The four-probe method gives higher accuracy than the two-probe for all samples tested.

Multifunctional Characteristics of Carbon Fibers Modified with Imidazolium Ionic Liquids

“…Carbon fiber-based composites are suited for multifunctional applications due to their inherent electrical and mechanical properties, and it was a primary objective of this study to increase CF electrical conductivity. The obtained values of electrical resistivity and contact resistance are shown in Table 1 , being 11.30 μAm and 325 Ω for the carbon fiber, with 29% lower than the manufacturer’s value (SIGRAFIL C T50-4.8/280-UN), which is acceptable for comparison purposes [ 51 ].…”

“…It is worthwhile to discuss the different characteristics of the hydroxyl functional group (OH) on the alkyl side chain, where the presence of polar groups enhances the surface polarizability in the presence of an electrical field due to an uneven distribution of charges. The polarity of the functional group (OH greater than CH 3 ) influences the overall electrical transport mechanism of the IL [ 51 ].…”

Anionic Polymerization of Para-Diethynylbenzene: Synthesis of a Strictly Linear Polymer

“…The results of measuring the electrical resistivity were obtained with the four-probe method as in [ 22 ].…”