INFLUENCES OF GRAPHENE NANOSHEETS ON THERMAL CONDUCTIVITY AND MECHANICAL PROPERTIES OF CARBON FIBER/POLYPROPYLENE COMPOSITES

Abstract

Abstract: Polypropylene (PP) is a high strength thermoplastic with low thermal conductivity which limits its application in many fields. So it is necessary to improve the thermal conductivity of PP composite material.Graphene nanosheets (GNSs) are a kind of layered micro-scale materials with excellent mechanical properties and thermal conductivity, but few research has been done. Carbon fiber (CF) is a high-strength and high-modulus fiber which can improve the PP/GNSs/CF mechanical properties and thermal conductivity. PP/GNSs/CF composites were prepared by melt blending to study the effect of different GNSs mass fractions on the mechanical properties and thermal conductivity of composites. The results show that the mixed use of GNSs and CF not only has obvious synergistic effect on the thermal conductivity, but also improves the mechanical properties. The thermal conductivity of PP/GNSs (3 phr)/CF (2 phr) composites is 0.42 W/(m·K), which was increased by 110% compared with pure PP. The tensile strength and flexural strength of the composites were increased to 38.0 MPa and 56.7 MPa, respectively, which were increased by 12% and 13%, respectively, compared with pure PP.

Key words: carbon fiber, thermal conductivity, graphene nanosheets, polypropylene

CLC Number:

TB332

XIA Xue, MEI Qi-lin, WANG Cong, ZHOU Xiao. INFLUENCES OF GRAPHENE NANOSHEETS ON THERMAL CONDUCTIVITY AND MECHANICAL PROPERTIES OF CARBON FIBER/POLYPROPYLENE COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2019, 0(1): 11-14.

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