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A kind of processing method of modified graphene

A processing method and graphene technology, applied in the field of material science, can solve problems such as the decline of processing and use performance, limit the application of graphene, etc., and achieve the effect of improving processing and use performance, improving biocompatibility, and improving dispersibility.

Inactive Publication Date: 2017-03-15
贵州一当科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the processing and use performance of nanomaterials represented by graphene are significantly reduced due to agglomeration and other reasons during use, which severely limits the application of graphene.

Method used

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  • A kind of processing method of modified graphene
  • A kind of processing method of modified graphene
  • A kind of processing method of modified graphene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 of the present invention: the processing method of modified graphene comprises the following steps,

[0015] 1) Completely dissolve graphite oxide in 100ml of water to obtain an aqueous graphite oxide solution; then add 100ml of ammonia water with a concentration of 20% by mass and stir at a stirring speed of 300r / min for 2 hours. After the stirring is completed, the solution is naturally cooled to At room temperature, the precipitate was filtered out, and after washing and drying, the purified Graphene-OH containing hydroxyl groups on the surface was obtained;

[0016] 2) Add 25g of γ-carotene and 9.8g of maleic anhydride to 60ml of benzene, mix well, and undergo a D-A reaction at 140°C for 4 hours under the protection of nitrogen; then add 93g of epichlorohydrin to the reacted mixture And 0.7g of ammonium bromide, heated to reflux for 6h, then cooled to 73°C, added excess sodium hydroxide, and washed to obtain long-chain compounds;

[0017] 3) Add 0.3mol...

Embodiment 2

[0018] Embodiment 2 of the present invention: the processing method of modified graphene comprises the following steps,

[0019] 1) Completely dissolve graphite oxide in 15ml of water to obtain graphite oxide aqueous solution; then add 120ml of ammonia water with a mass percentage concentration of 25% for stirring, the stirring speed is 400r / min, and the time is 3h. After the stirring is completed, wait for the solution to cool naturally to room temperature, then the precipitate was filtered out, and after washing and drying, the purified Graphene-OH containing hydroxyl groups on the surface was obtained;

[0020] 2) Add 22g of γ-carotene and 9g of maleic anhydride into 60ml of toluene, mix well, and undergo a D-A reaction at 170°C for 4 hours under the protection of nitrogen; then add 90g of epichlorohydrin and 0.6g ammonium bromide, heated to reflux for 5h, then cooled to 75°C, added excess sodium hydroxide, and washed to obtain long-chain compounds;

[0021] 3) Add 0.5mol ...

Embodiment 3

[0022] Embodiment 3 of the present invention: the processing method of improving graphene dispersion, comprises the steps,

[0023] 1) Completely dissolve graphite oxide in 30ml of water to obtain an aqueous graphite oxide solution; then add 150ml of ammonia water with a mass percentage concentration of 25% for stirring at a stirring speed of 500r / min for 4 hours. After the stirring is completed, the solution is naturally cooled to At room temperature, the precipitate is filtered out, and after washing and drying, the purified Graphene-OH containing hydroxyl groups on the surface is obtained;

[0024] 2) Add 27g of γ-carotene and 11g of maleic anhydride into 60ml of acetonitrile, mix well, and undergo a D-A reaction at 130°C for 5 hours under nitrogen protection; then add 90g of epichlorohydrin and 0.6g ammonium bromide, heated to reflux for 4 hours, then cooled to 75°C, added excess sodium hydroxide, and washed to obtain long-chain compounds;

[0025] 3) Add 0.8mol of long-c...

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Abstract

The invention discloses a treatment method for modified graphene. The invention pretreats and oxidizes graphite to obtain purified graphene containing hydroxyl groups on the surface, and obtains long-chain molecular products through chemical methods, and then design conditions to trigger reactions through chemical methods, so that long-chain molecules are grafted onto graphene. This method can improve the dispersibility of graphene and avoid agglomeration. The modified long-chain molecules come from a wide range of sources, are environmentally friendly, and are also conducive to improving the biocompatibility of graphene, and the modified long-chain molecules provided have more activity. It can provide more graphene modification, so that the obtained modified graphene can adjust the viscosity of the matrix, and can improve the processing and use performance. The method of the invention is simple and has good application effect.

Description

technical field [0001] The invention relates to the field of material science, in particular to a treatment method for modified graphene. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It is a two-dimensional material with a thickness of only one carbon atom. [0003] Graphene is the thinnest and hardest nanomaterial known in the world. Single-layer graphene is almost completely transparent, absorbing only 2.3% of light; the thermal conductivity is as high as 5300 W / m K, higher than that of carbon nanotubes and diamonds At room temperature, its electron mobility exceeds 15000 cm2 / V s, which is higher than that of carbon nanotubes or silicon crystals, and its resistivity is only about 10-8 Ω m, which is lower than that of copper or silver. It is the material with the smallest resistivity in the world. . Because of its extremely low resistivity and extremely fast electron migration, it is expected to be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/46C09C3/08C08L23/12C08K9/04C08K3/04
Inventor 王市伟魏喜苹
Owner 贵州一当科技有限公司
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