Large area transparent conductive graphene film preparation method
A graphene film, transparent and conductive technology, applied in cable/conductor manufacturing, chemical instruments and methods, conductive layers on insulating carriers, etc., can solve the problems of high-cost industrial applications, poor conductivity, difficult separation, etc. The effect of large-scale production, easy mass production, and simple preparation process
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Embodiment 1
[0029] (1) Preparation of GO
[0030] Add 2 g of natural flake graphite and 50 mL of concentrated H into a beaker 2 SO 4 , stirred with a magnetic stirrer for 30min under the condition of ice bath at 0 ℃, slowly added 3.54g KMnO 4 , the mixture was stirred at 0°C for 90 min and then at 35°C for 2 h. Add 40 mL of deionized water to the reaction solution. After the dropwise addition is completed, heat up to 90 °C and react for half an hour. Add 140 mL of deionized water to dilute the mixed solution. When the temperature of the solution drops to 60 °C, add 15 mL of H 2 o 2 , the color of the solution immediately became transparent and light yellow, and the transparent and light yellow solution was centrifuged with 1 M HCl solution for 3 times, then deionized water was used for 3 times, and then freeze-dried in the refrigerator, and finally placed in a freeze dryer Dry to obtain graphene oxide.
[0031] (2) Configuration of GO dispersion
[0032] Place the glass slide in a ...
Embodiment 2
[0038] (1) Preparation of GO
[0039] According to the method in Example 1, graphite was replaced by carbon nanotubes to prepare GO.
[0040] (2) Configuration of GO dispersion
[0041] According to the method in Example 1, methanol was replaced by N,N-dimethylformamide, and 15 mL of N,N-dimethylformamide / ultrapure water with a volume ratio of 1:8 was added to prepare GO dispersion liquid.
[0042] (3) Preparation of large-area flexible GO films
[0043] Such as image 3As shown, fill 1 with the organic solution containing GO, and 2 is the circulation system of ultrapure water. In the tank 3, first place the cleaned PET substrate, add 3 / 4 of the volume of the tank with ultrapure water, and close the valve. Then open the valve in tank 1 to let the GO dispersion drop slowly (3 s / drop) on the surface of the water in tank 3 to form film 4. After N,N-dimethylformamide volatilizes, turn on the ultrapure The valve 5 at the bottom of the tank of the water circulation system start...
Embodiment 3
[0047] (1) Preparation of GO
[0048] According to the method in Example 1, graphite was replaced by graphene nanobelts to prepare GO.
[0049] (2) Configuration of GO dispersion
[0050] According to the method in Example 1, methanol was replaced by tetrahydrofuran, and 9.5 mL of tetrahydrofuran / ultrapure water with a volume ratio of 1:10 was added to prepare the GO dispersion.
[0051] (3) Preparation of large-area flexible GO films
[0052] According to the method in Example 2, the flexible PET substrate was replaced by FRP (composite film) to prepare a large-area flexible GO film.
[0053] (4) Preparation of flexible graphene conductive film
[0054] According to the method in Example 2, hydriodic acid was replaced by phenylhydrazine, and the flow rate of phenylhydrazine vapor was 10 mL / min to prepare a large-area flexible transparent graphene conductive film.
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