Thermally Conductive Composite with High Mechanical Strength

S-K Koh
C&G Hitech Co., Ltd.,

Keywords: physical vapor deposition, nanoparticle, polymer composite, thermal conductivity, heat sink


Carbonaceous materials (graphite, CNT, graphene) were modified by nanoparticles on powder (NPP) process in which metal nanoparticles (Cu, Ag, Ni, Zn, Cu/Zn alloy etc.) are formed on the rotating carrier powder in physical vapor deposition system. The modified carrier materials were easily dispersed in water, organic solvent, and any polymer matrices. Modified polymeric or carbonaceous powder added polymer composites were synthesized by conventional hot melting process, and their characteristics with various concentrations of powder addition were investigated. Mechanical properties of the polymer composite were not changed much until addition of 40wt.% of graphite, in which graphite polymer composite by conventional chemical surface modification of carbon possesses rapid drops of mechanical properties. Control of the electrical conductivity and thermal conductivity of the composite were successfully carried out by Ni magnetic metal nanoparticles on carbon fiber addition. Physical properties of the composites especially thermal and electrical conductivity, and mechanical properties were explained comparing with the data fabricated by conventional chemical process. Applications of the carbon added composite were presented in terms of fuel cell bipolar plate, LED heat sink, electronic enclosure, etc. and R&D directions of the carbon addition into metal, ceramic and polymer matrices were suggested what we want to cooperate.