| 초록 |
Composites have been fabricated by incorporating solution-processable functionalized graphene nanoplatelets(GNPs) into an epoxy matrix, and their thermal conductivity were studied on effect of the surface modification and size of GNPs. For the surface modification of GNPs, pyrene-functionalized poly(dimethylaminoethyl methacrylate)-poly(methyl methacrylate) (PDMAEMA-PMMA) block copolymer were synthesized by the reversible addition fragmentation chain transfer method. Also, a various of dimension of GNPs were used with flake sizes from 5 µm to 25 µm to investigate the influence of nanofiller size on composite properties. The Py-PDMAEMA-PMMA on the GNPs surface acted as an important role to facilitate a homogeneous dispersion in the polymer matrix. Consequently, the thermal conductivity of Py-PDMAEMA-PMMA–GNPs/epoxy composites using the largest size of GNPs exhibited a remarkable improvement. The thermal conductivity of 7.5 wt. % Py-PGMA–GNS/epoxy has about 10.3 W/mK. |
