| 초록 |
Due to the rapid development of electrical devices, device failure caused by rapid temperature increase during operation has become a problem. Therefore, thermal interface material (TIM) which prevents device failure by heat dissipation has drawn numerous attractions in industry. Among various materials for TIM, carbon materials such as carbon nanotube (CNT), graphite has drawn interest by their high thermal conductivity for usage as a TIM. However, existing studies required the usage of harsh chemical solvents, surfactants, stabilizers, and thermal expansion for the application of carbon materials as TIM, limiting its usage for the actual application. Herein, we demonstrate a practical, novel green method of preparing CNT/graphene composite film with high thermal conductivity. CNT was functionalized for stable dispersion of CNT, also supporting the dispersion of graphite in an aqueous solvent by its strong interaction via π- π interaction, van der Waals interaction enabling the easy fabrication of TIM. The fabricated film showed high thermal conductivity due to the network formed by strong interaction between CNT and graphene. |
