A preparation process of graphene oxide three-dimensional self-assembled sheet

Abstract

The invention relates to the technical field of graphene, and relates to a preparation process of a graphene oxide three-dimensional self-assembled plate, comprising the following steps: (1) using hummers to prepare a graphene oxide filter cake; (2) adding deionized water so that its solid content is 1%‑5%, adjust the pH value to 3.0‑4.0; (3) Add urea-formaldehyde resin with a low degree of polymerization to make a graphene oxide composite slurry; (4) Coat the graphene oxide composite slurry on the substrate ;(5) at 50‑70 o Dry at C temperature; (6) Laminate 5‑7 sheets of graphene oxide film (7) at a vacuum degree of ‑60Kpa to ‑100Kpa and a temperature of 100 o C‑200 o Under the condition of C, pressurize at 1‑5MPa, let it stand for 0.5‑1h; (8) under the condition of argon, pressurize at 5‑10MPa, and raise the temperature to 800 o C‑1200 o C, stand still for 1‑2h; (9) in argon state, heat up to 2000‑2500 oC , stand still for 2-3h, complete the graphitization treatment, and make a graphene plate; the invention is simple and easy to implement, and has high practicability.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation process of a graphene oxide three-dimensional self-assembled sheet. Background technique [0002] High thermal conductivity graphite sheet is a new type of heat dissipation material developed by using the excellent thermal conductivity of graphite in recent years. This product is made by repeatedly heat treatment of carbon-based polymer films under special sintering conditions to make sheet materials with extremely high thermal conductivity. ; [0003] However, with the increase in the scope of application, the market demand for high thermal conductivity graphite sheets is more diversified, and high thermal conductivity graphite film products will also develop in the direction of larger thickness range and higher thermal conductivity. The method of increasing the thickness of the sheet can only be realized by the form of interlayer adhesive; [0004] Graphene oxi...

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Problems solved by technology

[0003] However, as the scope of application increases, the market's demand for high thermal conductivity graphite sheets will become more diversified, and high thermal conductivity graphite film products will also develop in the direction of a larger thickness range and higher thermal conductivity. The method of increasing the thickness of the sheet can only be realized by attaching glue between layers;