| 초록 |
Motivated by the requirement for a highly thermal conducting polymeric matrix, discotic liquid crystalline (DLC) monomers, DLC-ene and DLC-thiol were synthesized. The synthesized LC molecules were served as a polymeric matrix for heat dissipating composites filled with expanded graphite (EG) or hexagonal boron nitride (BN). DLC-EG composite presents better thermal conductive behavior than DLC-BN composite although the thermal conductivity value of BN is higher than EG. It was discovered that the DLC matrix presents a good interfacial affinity with EG due to the strong π−π interaction between EG and DLC so that the interfacial phonon scattering between polymeric medium and additive is suppressed. In contrast, BN can interact with DLC core via weak van der Waals interaction, and thus the DLC-BN composite has relatively poor thermal conductive performance. This work was supported by the BK21 plus, BRL2015042417, and Mid-Career Researcher Program (2016R1A2B2011041) of Republic of Korea. |
