High-heat-conductivity graphene membrane and preparing method thereof

Abstract

The invention provides a high-heat-conductivity graphene membrane and a preparing method thereof. The method includes the following steps of A, sequentially coating the surface of a base material withpolyamide acid resin and a graphene oxide solution, and conducting drying to obtain a graphene oxide compound membrane; B, stripping off the graphene oxide compound membrane from the base material toobtain a continuous graphene oxide compound membrane coiled material; C, conducting thermal treatment on the continuous graphene oxide compound membrane coiled material to obtain a carbonized continuous graphene oxide compound membrane; D, conducting graphitization treatment on the carbonized continuous graphene oxide compound membrane to obtain the high-heat-conductivity graphene membrane. The polyamide acid resin and the graphene oxide solution are sequentially formed into membranes, the structure of overlapping the graphene oxide membrane and the polyamide acid membrane is formed, the highheat conductivity of graphene can be more sufficiently realized, meanwhile the thicker graphene membrane can be obtained through stripping, the special requirements in the aerospace field can be met,and meanwhile the product yield of the stripped graphene is improved.

Description

technical field [0001] The invention belongs to the technical field of thermally conductive materials, and in particular relates to a graphene film with high thermal conductivity and a preparation method thereof. Background technique [0002] Graphite is an allotrope formed by carbon elements. Due to its perfect molecular structure, it has unique thermal, electrical, chemical and other properties, and can be widely used in industries such as electronics and heat dissipation. At present, the high thermal conductivity graphite film with a planar thermal conductivity of 800-1500W / m.K solves the local overheating problem of low-power chips such as mobile phones. However, as the performance of electronic equipment is getting better and better, the processing speed and frequency are getting higher and higher. The volume and weight are getting higher and higher, the power is getting bigger and bigger, the heat generation of electronic equipment is getting bigger and bigger, and th...

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Problems solved by technology

Through comparative analysis and actual production experience, it is found that the current technology has the following problems: it is difficult to peel off the graphene coating on the substrate, the product yield is low, and the efficiency is low; the size and process of preparing the film are difficult for large-scale production and application; it cannot be continuous Production of roll-shaped film, low production efficiency