Jang, Dawon Lee, Dong Su Lee, Aram Joh, Han-Ik Lee, Sungho 2024-01-19T19:03:26Z 2024-01-19T19:03:26Z 2021-09-05 2019-10 1226-086X https://pubs.kist.re.kr/handle/201004/119516 Thermal conductivity of carbon fibers (CFs) is an important property because CFs are used as heat dissipation fillers in composites for aerospace and electronics applications. However, evaluating thermal conductivity of a single filament of CFs is an arduous task due to dimensional issue of specimens and limitations of conventional measurement system. Therefore, we suggest an opto-thermal technique using Raman spectroscopy to measure thermal conductivity of commercial polyacrylonitrile based CFs (T300, T700SC and T800 H). The opto-thermal technique used that G band from Raman spectroscopy of carbon materials is shifted depending on temperature. For verifying an accuracy of the technique, the laser absorbance of CFs were estimated, and the thermal conductivity was measured depending on the length of CF. The measured data were reflected in the thermal conductivity calculation formula. It was demonstrated that the method provides more reasonable thermal conductivity values compare to a conventional Angstrom method. In addition, this simple technique confirmed that graphitic structure of CFs played a critical role in their thermal conductivity. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English 한국공업화학회 Opto-thermal technique for measuring thermal conductivity of polyacrylonitrile based carbon fibers Article 10.1016/j.jiec.2019.06.025 1 Journal of Industrial and Engineering Chemistry, v.78, pp.137 - 142 Journal of Industrial and Engineering Chemistry 78 137 142 N scie scopus kci ART002515831 000477689400014 2-s2.0-85067674479 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article RAMAN-SPECTRA TEMPERATURE-DEPENDENCE SINGLE GRAPHENE SPECTROSCOPY ABSORPTION DEFECTS Polyacrylonitrile Carbon fiber Thermal conductivity Raman spectroscopy Opto-thermal technique