▎ 摘　　要

NOVELTY - Preparing oriented graphene composite macroscopic body comprises e.g. (i) mixing the graphene oxide dispersion with the low-dimensional nanomaterial dispersion, adding the reducing agent, mixing and pouring the mixture into the forming mold for pre-reducing to obtain composite hydrosol, where the mass ratio of graphene oxide and low-dimensional nanomaterials is greater than or equal to 1:1, and the amount of reducing agent added is 1-3 times the mass of graphene oxide, (ii) placing the pre-reduced sol on the metal plate, placing the metal plate at the bottom of the freezer for directional freezing, taking out and placing in the air and then heating and thawing until it is completely thawed and transforming into a hydrogel, and reducing the hydrogel, and(iii) placing the reduced hydrogel on the metal plate again for directional freeze molding to strengthen its structure, taking out and placing in the air, then heating and thawing until it is completely thawed and transformed into a hydrogel. USE - The macroscopic body is useful in various fields i.e. aerospace and electronic device. ADVANTAGE - The method: is simple; reduces preparation cost; and improves electrical performance. DETAILED DESCRIPTION - Preparing oriented graphene composite macroscopic body comprises (i) mixing the graphene oxide dispersion with the low-dimensional nanomaterial dispersion, adding the reducing agent, mixing and pouring the mixture into the forming mold for pre-reducing to obtain composite hydrosol, where the mass ratio of graphene oxide and low-dimensional nanomaterials is greater than or equal to 1:1, and the amount of reducing agent added is 1-3 times the mass of graphene oxide, (ii) placing the pre-reduced sol on the metal plate, placing the metal plate at the bottom of the freezer for directional freezing, taking out and placing in the air and then heating and thawing until it is completely thawed and transforming into a hydrogel, and reducing the hydrogel, (iii) placing the reduced hydrogel on the metal plate again for directional freeze molding to strengthen its structure, taking out and placing in the air, then heating and thawing until it is completely thawed and transformed into a hydrogel, and increasing the temperature for further reducing the graphene oxide hydrogel, (iv) washing the reducing agent in the hydrogel many times until there is no residue, and compressing the hydrogel for further improving its orientation, (v) heating and drying the washed hydrogel under air conditions until it is completely dry, heating and annealing, where the bound water in the hydrogel is completely precipitated to obtain reduced graphene oxide composite aerogel with vertically oriented structure, and(vi) taking composite the oriented aerogel obtained in the step (iv) with the polymer by vacuum infusion method to obtain oriented graphene composite macroscopic body.