Thermal Conductivity And Antistatic Properties Of Epoxy/metal Nanoparticle Modified CNT Composites

Carbon nanotube(CNT) with high thermal and electrical conductivity can be used as an excellent function and reinforcement incorporated into epoxy resin, applied in the field of electronic packaging materials. However, its agglomeration in the epoxy resin due to high surface activation energy and itself entanglement is not conductive to enhance the thermal and electrical conductivity of the epoxy/CNT composites. Metal nanoparticle modification of CNT is an effective way to solve the problem. In this paper, epoxy resin was used as the polymer matrix and metal nanoparticles modification method had been taken to produce different kinds of metal nanoparticles modified carbon nanotubes, which were then compounded with epoxy resin to produce epoxy/CNT composites. Systematical analysis had been taken to clarify the effect of the dispersion of CNT in epoxy matrix and the electrical and thermal properties of epoxy/metal nanoparticles modified CNT composites.Firstly, CNT was successfully modified with copper nanoparticle which was in best micro morphology by electroless plating method under condition of pH=12, and was then compounded with epoxy to fabricate epoxy/copper nanoparticle modified CNT composites which constituent includes metal nanoparticles modified carbon nanotubes as filler, bisphenol F epoxy resin as matrix, 2-ethyl-4-methylimidazole as a curing agent by means of variable temperature curing process. The effect of the dispersion of CNT in epoxy matrix and the electrical and thermal properties of epoxy/copper nanoparticles modified CNT were studied. The results showed that the dispersion of CNT was improved significantly via copper nanoparticles modification and the improvement of thermal and electrical conductivity of composite was promoted as a result of excellent dispersion of cooper nanoparticles modified CNT reducing interfacial thermal resistance and resistance of composites. The performance of thermal and electrical conductivity of composites was improved significantly with the increase of the amount of copper nanoparticles modified carbon nanotube.Secondly, silver nanoparticle modified CNT was prepared successfully by method of electroless plating under condition of pH=8-9, then was compounded with bisphenol F epoxy resin epoxy being epoxy/silver nanoparticle modified CNT composites. The results showed that the improvement of thermal and electrical conductivity of composite was promoted as a result of excellent dispersion of silver nanoparticles modified CNT which reduced interfacial thermal resistance and resistance of composites effectively as well as copper nanoparticle modification and the thermal and antistatic performance of composites was satisfied by silver nanoparticles modification.