Abstract
Composites containing carbon fibers have been studied and practically applied to various fields as carbon fiber reinforced plastic, while their electrical properties are not fully utilized. This paper focuses on the excellent conductivity and mechanical properties of the plastic composite based on the vapor-grown carbon fiber (VGCF) as a filler material. The electrical properties of the composites using ethylene vinylacetate as a matrix resin are studied and evaluated as electromagnetic interference (EMI) shielding material.
The resistivity of the VGCF composite is 2.0×10-1Ω•cm at room temperature. The composite in which the VGCF is added with electroconductive carbon black (CB) as mixing filler to matrix resin shows lower resistivity, 7×10-2Ω•cm, than the individual filler composites of VGCF or CB. The EMI shielding effect of the mixed filler composite is as high as 60dB for a sample with 2mm thickness.
The composites using VGCF are evaluated as highly conductive plastic materials with enough strength, which could be applied to advance EMI shielding technology.
