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Treatment 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., to achieve the effect of improving processing and use performance, improving biocompatibility, and simple method

Inactive Publication Date: 2015-05-20
贵州一当科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Treatment method of modified graphene
  • Treatment method of modified graphene

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Effect test

Embodiment 1

[0013] Embodiment 1 of the present invention: the processing method of modified graphene comprises the following steps,

[0014] 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;

[0015] 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;

[0016] 3) Add 0.3mol...

Embodiment 2

[0017] Embodiment 2 of the present invention: the processing method of modified graphene comprises the following steps,

[0018] 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;

[0019] 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;

[0020] 3) Add 0.5mol ...

Embodiment 3

[0021] Embodiment 3 of the present invention: the processing method of improving graphene dispersion, comprises the steps,

[0022] 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;

[0023] 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;

[0024] 3) Add 0.8mol of long-c...

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Abstract

The invention discloses a treatment method of modified graphene. The treatment method comprises the following steps: pretreating and oxidizing graphite to obtain purified graphene of which the surface contains hydroxyl groups, also obtaining a long-chain molecule product by virtue of a chemical method, and then promoting reaction by virtue of designing conditions of the chemical method to ensure that long-chain molecules are grafted onto graphene. By virtue of the mode, the dispersion performance of graphene can be improved, and agglomeration can be avoided; the modified long-chain molecules are wide in source, are environment-friendly, and are also beneficial to the improvement of biocompatibility of graphene; and moreover, the provided modified long-chain molecules have relatively more active sites, and more graphene modification can be provided to ensure that obtained modified graphene has the effect of regulating the viscosity of a matrix and can be used for improving the processing and application properties. The method disclosed by the invention is simple and good in use 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 Applications(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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