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A kind of technology of grafting graphite and polymer, which is applied in the field of preparation of polymer-grafted graphene
Active Publication Date: 2011-05-04
杭州德烯科技集团有限公司
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However, how to graft common polymer chains onto graphene simply and conveniently remains a challenge.
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[0013] The preparation method of polymer grafted graphene is: adding 1 part by weight of graphene or graphene oxide, 10-1000 parts by weight of solvent, 10-1000 parts by weight of vinyl monomer, and adding 0.01-10 parts by weight under nitrogen Part of the initiator is heated to 55-90° C., reacted for 1.5-60 hours, precipitated, centrifuged, washed, and dried to obtain the product polymer grafted graphene.
[0019] Add 50.0mg of graphene oxide to the reaction flask, add 40mL of N,N-dimethylformamide (DMF) and 7.1g of glycidyl methacrylate, stir for 30min under nitrogen protection, and then add 41.0mg of azobisiso Nitrile, then heated to 65°C, reacted for 48h, precipitated, centrifuged, washed, and dried to obtain polymer grafted graphene with a polymer grafting amount of 77%. The thermal weight loss curve is as follows figure 1 Shown; its atomic force microscope image is as figure 2 As shown, multiple monodisperse polymer-grafted graphene sheets can be seen.
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[0021] Using the same reaction steps as in Example 1, the reaction time was 5.5 hours, and the polymer grafted graphene with a polymer grafting amount of 64% was obtained. The thermal weight loss 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 a compound, 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 same carbon family as carbon nanotubes and fullerenes. In 2004, it was made by A.K. Geim of the United Kingdom by peeling off natural graphite by the tape method (K.S. Novoselov, et al. Science, 2004, 306, 666-669). His discovery won the Nobel Prize in Physics in 2010. Graphene is a layer of carbon atoms with sp 2 The thickness of the two-dimensional carbon atom layer formed by the hybrid connection is only 0.34nm, which is the thinnest two-dimensional nanomaterial found so far. Studies have found that graphene is currently the world's strongest material, its strength is 20 times higher than high-strength carbon fiber, and 100 times higher than the best steel. In addition, graphene also has a large specific surface area, extremely high ...
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