PREPARATION METHOD OF GRAPHENE/METAL COMPOSITE BOARD

Abstract

A method for preparing a graphene/metal composite sheet includes adding polyvinyl alcohol into distilled water and heat to about 100 C. under stirring to prepare a polyvinyl alcohol solution; dispersing graphene in distilled water using ultrasonication to prepare a graphene solution; mixing the polyvinyl alcohol solution and the graphene solution to form a graphene/polyvinyl alcohol mixed slurry; after a metal sheet is subjected to a surface activation treatment, coating the graphene/polyvinyl alcohol mixed slurry onto the metal sheet at both upper and lower surfaces; vacuum sintering to remove the polyvinyl alcohol in the surface coating to obtain a graphene/metal plate; overlaying at least two graphene/metal plates and bonding them together via hot isostatic pressing to form multilayer graphene/metal plates; and hot rolling the bonded multilayer graphene/metal plates to form the graphene/metal composite sheet.

Claims

1. A method for preparing a graphene/metal composite sheet, wherein: the method comprises: adding polyvinyl alcohol into distilled water and heat to about 100 C. under stirring to prepare a polyvinyl alcohol solution; dispersing graphene in distilled water using ultrasonication to prepare a graphene solution; mixing the polyvinyl alcohol solution and the graphene solution to form a graphene/polyvinyl alcohol mixed slurry; after a metal sheet is subjected to a surface activation treatment, coating the graphene/polyvinyl alcohol mixed slurry onto the metal sheet at both upper and lower surfaces; vacuum sintering to remove the polyvinyl alcohol in the surface coating to obtain a graphene/metal plate; overlaying at least two graphene/metal plates and bonding them together via hot isostatic pressing to form multi layer graphene/metal plates; and hot rolling the bonded multilayer graphene/metal plates to form the graphene/metal composite sheet.

2. The method of claim 1, wherein the ultrasonication is for about 30 minutes.

3. The method of claim 1, wherein the graphene/polyvinyl alcohol mixed slurry is coated onto the metal sheet by spraying.

4. The method of claim 1, wherein the thickness of the coating is greater than 100 m.

5. The method of claim 1, wherein the vacuum sintering temperature is 500 C.

6. The method of claim 1, wherein the hot isostatic pressing is done at a temperature of about 480 C.

7. The method of claim 1, wherein the hot isostatic pressing is done at a pressure of about 110 MPa.

8. The method of claim 1, wherein the hot isostatic pressing lasts for about two hours.

9. The method of claim 1, wherein the hot rolling is done at a temperature between about 440 C. and 480 C.

10. The method of claim 1, wherein the polyvinyl alcohol solution has a weight:volume ratio of polyvinyl alcohol:water of about 1:9.

11. The method of claim 1, wherein the graphene solution has a weight:volume ratio of graphene:water of about 1:19.

Description

DETAILED DESCRIPTION

[0020] The following examples will combine the technical aspect of the present invention and describe in detail.

EXAMPLE 1

[0021] The procedure of preparing graphene reinforced metal material are as follows:

[0022] (1) Add 50 g PVA into 450 ml distilled water and heated to 100 C. under stirring to prepare the PVA solution.

[0023] (2) Disperse 25 g graphene in 475 ml distilled water and ultrasound with Ultrasonic cell crushing apparatus for 30 min to prepare the graphene solution.

[0024] (3) Uniformly mix the PVA solution in step (1) and graphene solution in step (2) to form graphene/PVA slurry.

[0025] (4) Choose three to five blocks of aluminum alloy sheets with thickness 1 mm4 mm or 610 aluminum alloy sheets with thickness 1 mm2 mm, after surface activation treatment, descaling, clean and dry, spraying the graphene/polyvinyl alcohol mixture slurry to an aluminum alloy sheet at both upper and lower sides, the spraying procedure is divided and completed in 10 times, each time the total thickness of coating about 10 m, the final coating is 100 m120 m;

[0026] (5) By vacuum sintering method or in the protective atmosphere of argon to remove polyvinyl alcohol in the metal sheet surface coating and obtain graphene sheet metal; the vacuum sintering temperature is 500 C.,

[0027] (6) After overlaying multiple sheets of the graphene-alloy together, bond them via hot isostatic manner at 480 C., 110 MPa, 2 h.

[0028] (7) Hot roll the multi-layer plates in step (6) to form the composite sheets of graphene combined aluminum at 440 C.480 C.

[0029] Although only a few example embodiments have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the example embodiments without materially departing from this invention. Accordingly, all such modifications are intended to be included within the scope of this disclosure as defined in the following claims.