▎ 摘　　要

NOVELTY - Vertically aligned carbon nanotube array and a graphene composite film material comprises graphene and a vertically oriented carbon nanotube array that is uniformly distributed graphene, where the vertically oriented carbon nanotube array structure provides an additional longitudinal heat conduction path for the composite film material body to form a longitudinal heat conduction path between the graphene layers. Graphene provides a transverse heat conduction path for the body of the composite film material. The vertically oriented carbon nanotube array and the graphene material are formed into a three-dimensional network heat conduction channel structure by using the vertically oriented carbon nanotube array and the directional heat conduction channel of the graphene material. A thermal interface junction structure is formed at a contact location or junction of the nanotube array and graphene. USE - Vertically aligned carbon nanotube array and graphene composite film material for use in electronic device heat dissipation fields. ADVANTAGE - The vertically aligned carbon nanotube array and graphene composite film material improves the lateral and longitudinal thermal conductivity of the effective thermal interface heat dissipating material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing vertically aligned carbon nanotube array and a graphene composite film material, which involves: (A) using a catalyst patterned on the substrate to grow vertically on the substrate orienting the carbon nanotube array; (B) densifying the vertically aligned carbon nanotube array prepared to obtain a vertically aligned carbon nanotube array having a densified structure; (C) adding the graphene oxide to the ionic water, and centrifugally stirring to prepare a graphene oxide solution; (D) placing the vertically aligned carbon nanotube array subjected to the densification treatment on a constant temperature heating table for constant temperature heating, and dropping the obtained graphene oxide solution applying to the densified vertically oriented carbon nanotube array, evaporating the moisture, and then applying pressure on the obtained vertically aligned carbon nanotube array and the graphene oxide composite film to perform compaction molding; and (E) heating the composite film structural material precursor to 1400 degrees C, and performing the fourth-stage heat treatment for 120-180 minutes to obtain vertically aligned carbon nanotube array and a graphene composite film.