Jung, Hana Chung, Hak Jun Yu, Jaesang 2024-01-19T14:01:46Z 2024-01-19T14:01:46Z 2021-10-21 2021-09 1226-086X https://pubs.kist.re.kr/handle/201004/116553 This study indicates the importance of structure optimization and analysis for investigating direct screen-printed pastes of carbon based microstructures for use in flexible thermal interface material (TIM). The basalt fiber that is used as reinforcement in microstructures is a non-toxic as a mineral fiber made from natural raw material. After direct screen printing, the effect of the basalt particles on the morphology and surface of the screen-printed pastes was analyzed by SEM observation. Basalt particles support densified structures of which the contact surface gaps were reduced to optimize the conductive interface materials. xGnP paste reinforced with well-dispersed basalt particles was used to optimize the surface onto substrate by decreasing the void volume. This result could contribute to improvement of the thermal properties owing to decreased thermal resistance at the interface by filling gaps. This is because, thermal conduction is sensitive to the presence of surface structures such as voids and defects. The in-plane thermal conductivity of xGnP paste containing a high concentration of basalt particles was increased to 3.011 W m(-1)K(-1), representing an improvement of 108% compared to a pure xGnP paste. The high concentrations of basalt particles densified the microstructures, and served as reinforcement to enhance the thermal performance of the thin TIM. This approach will be extended to create sustainable pastes for effective thermal management and for optimization of a direct printing process for thermal conductive interface materials. (C) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English 한국공업화학회 Microstructure design and analysis of thermal interface materials using high heat- resistance natural fibers Article 10.1016/j.jiec.2021.06.003 1 Journal of Industrial and Engineering Chemistry, v.101, pp.270 - 278 Journal of Industrial and Engineering Chemistry 101 270 278 N scie scopus kci 000681311100011 2-s2.0-85108321193 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article COPPER NANOWIRE COMPOSITES BASALT FIBER CONDUCTIVITY Basalt fiber Microstructures Thermal properties Screen printing