▎ 摘　　要

NOVELTY - preparing graphene electromagnetic shielding composite material comprises (i) preparing multilayer graphene nanosheet powders by physical or chemical exfoliation of highly oriented pyrolytic graphite, (ii) subjecting multi-layer graphene nanosheet powder to ultrasonic to obtain dispersed graphene nanosheets, dispersing dispersed graphene nanosheets and polymer matrix material in polar organic dispersant with heating and stirring, and then stirring after they are uniformly dispersed, and blend uniformly to form graphene-polymer mixed solution, (iii) injecting graphene-polymer mixture into mold groove and heating by constant temperature heating sheet, at the same time, applying magnetic field to outside to make the graphene nanosheets oriented in the solution, after the organic dispersant is completely volatilized, curing to obtain highly oriented graphene composite colloid, further highly oriented anisotropic graphene electromagnetic shielding composite material is obtained. USE - The method is useful for preparing graphene electromagnetic shielding composite material used in wireless communication technology, preferably Bluetooth (RTM: Wireless data communications protocol), home wireless fidelity (WIFI) and 5G communication. ADVANTAGE - The method: provides high-quality original multilayer graphene nano-sheet powder by physical peeling high-directional pyrolysis graphite without containing functional group, such as carboxyl, ketone, epoxy and hydroxyl, greatly reducing the damage of the graphene intrinsic structure, and keeping the excellent graphene anti-magnetic property; quickly generate alignment orientation response without adding auxiliary magnetic particles under the magnetic field intensity of dozens of millitesla, overcoming the defect of the existing technology using iron chloride magnetic for auxiliary arrangement, so as to avoid the pollution caused by the auxiliary material; enhances the performance and application effect graphene the macroscopic arrangement, providing a sufficient guarantee for realizing the ideal electromagnetic shielding effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene electromagnetic shielding composite material, obtained by above method.