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General preparation method for reduced graphene oxide-based composite film

A graphene-based composite film technology, applied in the direction of graphene, carbon nanotubes, nano-carbon, etc., can solve the problems of poor flexibility or stability of graphene-based composite films, and limit the potential application range of graphene-based composite films. Achieve the effects of perfect crystal structure, adjustable crispness and strong universality

Inactive Publication Date: 2019-08-16
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, graphene-based composite films synthesized by direct chemical reduction or high-temperature thermal reduction have poor flexibility or stability, which limits the potential application range of graphene-based composite films.

Method used

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  • General preparation method for reduced graphene oxide-based composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step (1): Disperse 0.5 g of graphene oxide in 100 mL of water, stir for 8 h, and sonicate for 20 min to obtain a 5 mg / mL graphene oxide dispersion;

[0033] Step (2): Dissolve 1 g of polyvinyl alcohol in 100 mL of water to prepare a 10 mg / mL polyvinyl alcohol solution;

[0034] Step (3): Take 0.5 mL of the graphene oxide dispersion prepared in step (1) and 1 mL of the polyvinyl alcohol solution prepared in step (2) and redisperse them in 200 mL of water to prepare graphene oxide / polyvinyl alcohol mixed solution;

[0035] Step (4): The graphene oxide / polyvinyl alcohol mixed solution prepared in step (3) is suction-filtered on an organic membrane with a diameter of about 4 cm to form a graphene oxide / polyvinyl alcohol mixed solution composite membrane.

[0036] Step (5): After putting the graphene oxide / polyvinyl alcohol composite film prepared in step (4) into the polytetrafluoroethylene lining, add 1 mL of water, seal it and put it into the reactor, and then seal it P...

Embodiment 2

[0039] Step (1): Disperse 1 g of graphene oxide in 200 mL of water, stir for 10 h, and sonicate for 5 min to obtain a graphene oxide dispersion;

[0040] Step (2): Add 0.01 g of carbon nanotubes, 10 mL of ethylenediamine and 5 g of sodium ascorbate to the graphene oxide dispersion obtained in step (1), stir for 1 h, and sonicate for 10 min, then take out 0.2 mL and dilute to 100 mL of water was filtered on an organic membrane with a diameter of about 4 mm after ultrasonication for 5 min to prepare a graphene oxide / carbon nanotube composite membrane.

[0041] Step (3): Put the graphene oxide / carbon nanotube composite film prepared in step (2) into a 150 mL polytetrafluoroethylene liner, add 1 mL of water, 1 mL of ethanol and 0.1 mL of ethylene glycol After the mixed solution is sealed, put the lining of the reactor into the reactor, and put it into 130 o The solvothermal reduction reaction was carried out in a C oven for 10 h to obtain the reduced graphene oxide / carbon nanotub...

Embodiment 3

[0044] Step (1): Disperse 1 g of graphene oxide in 200 mL of water, stir for 10 h, and sonicate for 10 min to obtain a graphene oxide dispersion;

[0045]Step (2): Take 5 mL of the graphene oxide dispersion obtained in step (1) and 2 mL of ethanol in a 10 mL glass bottle, stir for 10 min, then add 0.5 mL of tetrabutyl titanate (belonging to the aforementioned Precursor of inorganic nanomaterials), stirred for 30 minutes and then ultrasonicated for 2 minutes, to filter it into a graphene oxide-based composite membrane.

[0046] Step (3): Put the graphene oxide-based composite membrane in step (2) into the polytetrafluoroethylene lining, add 1 mL of water and seal it, then put it into the reactor and seal it, put the reactor into Into 150 o The hydrothermal reaction was carried out in a vacuum oven for 12 h to obtain the reduced graphene oxide / titanium dioxide composite film.

[0047] The reduced graphene oxide / titanium dioxide composite film obtained by the method has photoca...

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Abstract

The invention provides a general preparation method for a reduced graphene oxide-based composite film. The method comprises the following steps: firstly preparing a graphene oxide-based mixed solution, preparing a graphene oxide-based composite film by using a manner such as vacuum suction filtration, spin coating, drop coating, blade coating and coating, putting the graphene oxide-based compositefilm into a reaction vessel, adding a liquid, performing sealing, and conducting a hydrothermal or solvothermal reduction reaction at a certain temperature to prepare the reduced graphene oxide-basedcomposite film, wherein the mixed solution can contain a polymer, an organic nano material, an inorganic nano material, a metal nano material and the like besides graphene oxide. The method providedby the invention has the advantages of high universality and a simple and convenient preparation process; the prepared reduced graphene oxide-based composite film can be further subjected to high-temperature reduction to obtain a reduced graphene oxide-based composite film with a higher graphene reduction degree and a more complete crystal structure; and the reduced graphene oxide-based compositefilm prepared by utilizing the method has good stability, adjustable thickness and crispness, and thermal conductivity, electrical conductance and catalytic performance of the composite film can be adjusted through different compounding.

Description

technical field [0001] The invention relates to a general preparation method of a reduced graphene oxide-based composite film. Background technique [0002] Graphene-based composite materials have broad application prospects in energy, environment, chemical and other fields. For example, graphene-based composite membranes have important research value and application value in material separation, catalysis, lithium-ion batteries, supercapacitors, sensors, etc. However, the poor solubility of graphene greatly limits the research and application of graphene-based composite materials. Therefore, people first synthesize graphene oxide with good water solubility, compound it with other materials to prepare graphene oxide-based composite materials, and then repair the graphene structure through chemical reduction or high-temperature thermal reduction to synthesize graphene-based composite materials, such as gas Gels, fibers and membranes. However, graphene-based composite films...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01B32/16C08J5/18C08L29/04C08L33/20C08K3/04
CPCC01B32/184C01B32/16C08J5/18C08K2201/011C08J2329/04C08J2333/20C08K3/042C08K3/041
Inventor 张柯庄鹏宇李斌张明建邓楠鲁端峰王乐
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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