Highly thermally conductive and EMI shielding composite reinforced with aligned carbon fibers and MXene

Measures to ensure the thermal management of electronic devices have attracted increasing interest. In this study, a composite material with high thermal conductivity and electromagnetic wave shielding performance was fabricated by vertically aligning carbon fibers (CFs) using a perpendicular magnetic field. MXene was added as a double filler with aligned CFs to increase the thermal conductivity and electromagnetic wave shielding performance. Magnets were placed outside the mold with the same poles faced each other, and the magnets repelled each other to form a perpendicular magnetic field. In this manner, the Fe3O4 decorated CFs aligned perpendicularly to the UV resin. MXene was dispersed between the aligned CFs to form a heat conduction path, and an interface was generated to reflect and absorb electromagnetic waves. Owing to the effective heat transfer in the vertical direction, the printed composite exhibited a thermal conductivity of 1.96 W/mK and electromagnetic shielding effect of 14.06 dB.