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Method for preparing graphene/polymer composite material based on infrared irradiation

An infrared and polymer technology, applied in the field of preparation of graphene/polymer composite materials, can solve the problem of difficulty in obtaining uniformly dispersed graphene/polymer composite materials, unsuitable for large-scale preparation of graphene, graphene sheet size and thickness Difficult to control and other problems, to achieve the effect of being conducive to popularization and utilization, low production cost, and high heat conversion efficiency

Active Publication Date: 2012-09-26
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Oriented epigenetic graphene, that is, graphene is grown on the oriented metal surface by chemical vapor deposition. This method can theoretically achieve infinitely long and very wide graphene thin layers, but it requires high temperature and graphite Corrosive chemicals are required to strip the olefin from the surface of the metal substrate;
[0006] 2. The micromechanical exfoliation method, which is suitable for studying the electrical properties and other properties of graphene, but the size and thickness of graphene sheets obtained by this method are currently difficult to control, and are not suitable for large-scale preparation of graphene;
At present, the graphite oxide is usually reduced first, and then compounded with the polymer, but because the graphene prepared by the reduced graphite oxide method is easy to agglomerate, it is difficult to obtain a uniformly dispersed graphene / polymer composite material.

Method used

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  • Method for preparing graphene/polymer composite material based on infrared irradiation
  • Method for preparing graphene/polymer composite material based on infrared irradiation
  • Method for preparing graphene/polymer composite material based on infrared irradiation

Examples

Experimental program
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Effect test

preparation example 1

[0033] After 3g graphite, 3g sodium nitrate, 60mL concentrated sulfuric acid (98%) and 6g potassium permanganate were reacted at 35°C for 2 hours, 100mL deionized water was added, and then 3% hydrogen peroxide was added. 200mL of hydrogen oxide aqueous solution, after standing for 12 hours, pickling and water washing to obtain graphite oxide gel. The graphite oxide colloid is vacuum-dried or freeze-dried at room temperature 25°C to obtain graphite oxide solid. An infrared heating lamp with a power of 275W is used to irradiate the graphite oxide solid at a distance of 10 mm for 1 minute, and a reduction reaction occurs to obtain a reduced graphite oxide solid. The scanning electron micrograph of the reduced graphite oxide solid is like figure 1 As shown, it can be seen that the reduced graphite oxide obtained under this condition has a loose and porous structure, indicating that the reduction process is relatively violent and a large amount of gas is released. The X-ray diffrac...

Embodiment 1

[0034] The graphite oxide aqueous solutions in Examples 1-16 are all obtained by dissolving the graphite oxide solid prepared in Example 1 in deionized water.

[0035] Example 1

[0036] 1) Mix 200 parts of graphite oxide aqueous solution with 0.5% by weight of graphite oxide and 10 parts of polyvinyl alcohol aqueous solution with 10% by weight of polyvinyl alcohol. The number average molecular weight of polyvinyl alcohol is 1799. After mixing uniformly, the mixed solution is obtained, poured into a sample tank, dried in an oven at 70°C for 12 hours, and dried until the weight percentage of the total solvent is equal to 35% to obtain a graphite oxide / polyvinyl alcohol composite film (composite product) , The composite film is non-conductive;

[0037] 2) Use an infrared heating lamp with a power of 275W to irradiate the graphite oxide / polyvinyl alcohol composite film at a distance of 100 mm from step 1) for 30 minutes to obtain 1.5 parts of conductive reduced graphite oxide / polyvinyl...

Embodiment 2

[0039] 1) Mix 100 parts of the graphite oxide aqueous solution with 0.5% by weight of graphite oxide and 1 part of the aqueous solution with 10% by weight of polyvinyl alcohol, where the number average molecular weight of polyvinyl alcohol is 5000, and stir well After obtaining the mixed solution, the mixed solution was diluted with water to the weight percentage of graphite oxide in the mixed solution to 0.01%, 0.02%, 0.05%, 0.1%, 0.2% and 0.4%, and 10 parts of the diluted mixed solution were taken. Cast on the surface of quartz glass, dry in an oven at 70°C for 12 hours, and dry until the weight percentage of the total solvent is equal to 25%, to obtain a graphite oxide / polyvinyl alcohol composite film (composite product), which is non-conductive of;

[0040] 2) Use an infrared heating lamp with a power of 275W to irradiate the graphite oxide / polyvinyl alcohol composite film for 30 minutes at a distance of 100 mm from the graphite oxide / polyvinyl alcohol composite film in step ...

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Abstract

The invention discloses a method for preparing a graphene / polymer composite material based on infrared irradiation. The method comprises the following steps: 1) mixing a graphite oxide solution with a polymer solution or polymer emulsion to obtain a mixed solution, casting or spinning, and drying until the weight percentage of the total solvent is less than or equal to 50 percent so as to obtain a composite product; and 2) removing the solvent from the composite product under the irradiation of an infrared heating lamp, and performing reduction reaction of graphite oxide to obtain the graphene / polymer composite material. By the preparation method, the graphene / polymer composite material is prepared under the irradiation of the infrared heating lamp, the process is simple and convenient, the production cost is low, the method is suitable for large-scale industrial production, different polymers can be selected for preparing different graphene / polymer composite materials so as to meet the production and use requirements, and the graphene / polymer composite material has a wide application prospect in the fields such as conductive polymer composite materials, films and fibers.

Description

Technical field [0001] The invention relates to the field of preparation of graphene / polymer composite materials, in particular to a method for preparing graphene / polymer composite materials based on infrared radiation. Background technique [0002] Graphene is a single-layer carbon material composed of carbon atoms. In 2004, the University of Manchester AKGeim and its collaborators reported for the first time that graphene was obtained by stripping graphite with plastic tape (KSNovoselov, AKGeim, SVMorozov, D. Jiang, Y. Zhang, SVDubonos, IVGrigorieva, AA Firsov, Electric Field Effect in Atomically Thin Carbon Films, Science, 306, 22, 2004, 666-669). Subsequently, graphene began to be favored by researchers all over the world. [0003] Graphene has a large specific surface area (2360m 2 ·G -1 ), higher electron mobility (200000cm 2 ·V -1 ·S -1 ), higher Young's modulus (1.0TPa), higher thermal conductivity (5000W·m -1 ·K -1 ) And light transmittance (97.7%), it has broad applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08L71/02C08L27/18C08L27/20C08L83/04C08L81/06C08L71/10C08L79/08C08K9/02C08K3/04
Inventor 彭懋郭宏磊孙丽娜郭唐华
Owner ZHEJIANG UNIV
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