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Preparation method of polymer-grafted graphene

A technology for grafting graphite and polymers, applied in the field of preparation of polymer grafted graphene

Active Publication Date: 2012-12-05
杭州德烯科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to graft common polymer chains onto graphene simply and conveniently remains a challenge.

Method used

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  • Preparation method of polymer-grafted graphene
  • Preparation method of polymer-grafted graphene

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preparation example Construction

[0013] The preparation method of polymer-grafted graphene is: add 1 weight part of graphene or graphene oxide, 10-1000 weight parts of solvent, 10-1000 weight parts of vinyl monomer, add 0.01-10 weight parts under nitrogen gas part of initiator, heated to 55-90° C., reacted for 1.5-60 hours, precipitated, centrifuged, washed and dried to obtain polymer-grafted graphene.

[0014] The vinyl monomers are: styrene, sodium styrene sulfonate, methyl methacrylate, butyl methacrylate, hydroxyethyl methacrylate, glycidyl methacrylate, dimethylamino methacrylate Ethyl ester, diethylaminoethyl methacrylate, tert-butyl methacrylate, 3-(methacryloyloxy)propyltrimethoxysilane, methyl acrylate, butyl acrylate, hydroxyethyl acrylate, glycidyl acrylate , dimethylaminoethyl acrylate, diethylaminoethyl acrylate, tert-butyl acrylate, acrylamide, N-isopropylacrylamide, methacrylic acid, acrylic acid, 4-vinylpyridine, 2-vinylpyridine, 4 - vinylpyrrolidone or acrylonitrile.

[0015] The solvent is...

Embodiment 1

[0019] Add 50.0 mg of graphene oxide to the reaction flask, add 40 mL of N, N-dimethylformamide (DMF) and 7.1 g of glycidyl methacrylate, stir for 30 min under nitrogen protection, and then add 41.0 mg of azobisiso Nitrile, then heated to 65 ° C, reacted 48h, through precipitation, centrifugation, washing, drying to obtain polymer grafted graphene with a polymer grafting amount of 77%, its thermal weight loss curve is as follows figure 1 shown; its atomic force microscope image is shown in figure 2 As shown, multiple monodisperse polymer-grafted graphene sheets can be seen.

Embodiment 2

[0021] Using the same reaction steps as in Example 1, the reaction time was 5.5 hours to obtain a polymer grafted graphene with a polymer grafting amount of 64%, and its thermogravimetric curve is as follows figure 1 shown.

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Abstract

The invention discloses a method for grafting a polymer ona surface of graphene. The method comprises the following steps: adding 1 part by weight of graphene or graphene oxide, 10-1000 parts by weight of solvent and 10-1000 parts by weight of vinyl monomer, and adding 0.01-10 parts by weight of initiator under introduction of nitrogen; heating to 55-90 DEG C, and carrying out reaction for 1.5-60hours; and precipitating, centrifugating, washing, and drying, thus obtaining a product of polymer-grafted graphene. The method is convenient and simple in process, can be used for the large-scale production, is the universal method and ensures that a variety of polymers can be grated onto the graphene. The obtained functionalized graphene has good solubility and good solution processability, is conducive and has extensive application value in micro-nano electronics, machinery, chemical industry, high-performance materials and other fields.

Description

technical field [0001] The invention relates to a preparation method of compounds, in particular to a preparation method of polymer-grafted graphene. Background technique [0002] Graphene is a new type of carbon material, which belongs to the carbon family together with carbon nanotubes and fullerenes. In 2004, it was made by A.K.Geim of England by stripping natural graphite by tape method (K.S.Novoselov, et al.Science, 2004, 306, 666-669). Its discovery was awarded the Nobel Prize in Physics in 2010. Graphene is a layer of carbon atoms with sp 2 The two-dimensional carbon atomic layer formed by hybrid connection has a thickness of only 0.34nm, which is the thinnest two-dimensional nanomaterial found so far. Research has found that graphene is currently the strongest material in the world, 20 times stronger than high-strength carbon fiber, and 100 times stronger than the best steel. In addition, graphene also has many excellent properties such as a large specific surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00
Inventor 高超阚兰艳
Owner 杭州德烯科技集团有限公司