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Graphene dispersing agent, preparation method thereof and preparation method of graphene

A graphene dispersant and graphene technology, applied in the field of dispersants, can solve the problems of low yield, environmental protection, complicated process, etc., and achieve the effect of simple preparation process, low cost, and easy process control

Active Publication Date: 2020-05-19
合肥艾克思维新材料科技有限公司
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Problems solved by technology

[0005] In view of this, it is necessary for the present invention to provide a graphene dispersant and its preparation method and application. In the preparation method of the graphene dispersant, 9-anthracenol and stearyl chloride are fully dissolved and mixed in an aprotic solvent and then added Prepared from lye, the graphene dispersant is used for liquid-phase exfoliation of graphite to prepare graphene with high efficiency and environmental protection, and the preparation process is simple, and the reaction conditions are mild and easy to control, which solves the problem of the existing graphene dispersant. Low and not environmentally friendly technical issues

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  • Graphene dispersing agent, preparation method thereof and preparation method of graphene
  • Graphene dispersing agent, preparation method thereof and preparation method of graphene
  • Graphene dispersing agent, preparation method thereof and preparation method of graphene

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preparation example Construction

[0035] Second aspect of the present invention discloses the preparation method of graphene dispersant as described in the first aspect of the present invention, comprises the following steps:

[0036] Add 9-anthracenol and stearyl chloride into the non-protonated solvent to fully dissolve to form a uniform mixed solution;

[0037] After adding lye to the mixed solution, stirring and reacting, purifying and drying to obtain the graphene dispersant.

[0038] In the present invention, 9-anthracenol and stearyl chloride are used to prepare a small molecule graphene dispersant containing non-polar anthracenyl and octadecyl hydrophobic segments (9-anthracenol grafted hard Ester acid chloride), its chemical structural formula is as described in one aspect of the present invention, and this graphene dispersant can also improve the quality and productive rate of graphene when exfoliating graphite to form graphene. In some embodiments of the present invention, the finally obtained grap...

Embodiment 1

[0050] Add 10.0g of 9-anthracenol and 20.0g of stearyl chloride into 0.9L of N,N-dimethylformamide, fully dissolve and form a uniform mixed solution; then add 20.0mL of triethylamine to the aforementioned mixed solution, and The reaction was mechanically stirred for 15 h at room temperature, centrifuged and dried to obtain a graphene dispersant.

[0051] 20.0g natural flake graphite (400 mesh), 5.0g graphene dispersant prepared in the present embodiment and ethylene glycol monoethyl ether were added to the reaction vessel and mixed uniformly, and ultrasonic peeling was carried out under the ultrasonic assist (power 200W) for 5h; After the stripping was completed, the product was centrifuged at 3000 rpm for 45 min to obtain a dispersion of upper graphene.

[0052] The graphene dispersion prepared in this embodiment is stable without sedimentation, and the exfoliation rate is 20%.

[0053] figure 2 It is the scanning electron micrograph of the graphene that the embodiment of ...

Embodiment 2

[0059] Add 8.0g of 9-anthracenol and 13.0g of stearyl chloride into 0.5L of acetone, fully dissolve and evenly form a uniform mixed solution; then add 15.0mL of ethylenediamine to the aforementioned mixed solution, stir the reaction at room temperature for 18h, centrifuge Post-dry to obtain graphene dispersant.

[0060] 20.0g expanded graphite (400 mesh), 8.0g graphene dispersant prepared in the present embodiment and 1.5L tetrahydrofuran are added to the reaction vessel and mixed uniformly, and ultrasonic stripping is carried out under the assistance of ultrasonic wave (power 100W) for 6h; , the product was centrifuged at 2000 rpm for 60 min to obtain a dispersion of upper graphene.

[0061] The graphene dispersion prepared in this embodiment is stable without sedimentation, and the exfoliation rate is 15%.

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Abstract

The invention discloses a graphene dispersing agent, a preparation method thereof and a preparation method of graphene. 9-anthracenemethanoland stearoyl chloride are subjected to an affinity acyl substitution reaction to prepare the small-molecular graphene dispersing agent, the small-molecular graphene dispersing agent is used for liquid-phase stripping of graphite to prepare graphene, the efficiency is high, the environment is protected, the preparation process is simple, and the reaction conditions are mild and easy to control.

Description

technical field [0001] The invention belongs to the technical field of dispersants, in particular to a graphene dispersant and a preparation method thereof, and also to a graphene preparation method. Background technique [0002] Graphene is made of sp 2 Hybridized carbon atoms are interconnected to form a two-dimensional carbon nanomaterial with a single atomic layer. The thickness is only 0.334 nm. The structure of graphene is quite special because it has a perfect sp 2 The hybrid carbon structure, the large conjugated bond system, and the periodic structure with infinite repetition in the two-dimensional plane; the special and stable crystal structure endows graphene with many unique characteristics. For example, graphene has high thermal conductivity (3000-5000W / mk at room temperature), high electrical conductivity (electron mobility exceeds 15000cm 2 / vs), high specific surface area (about 2630m 2 g -1 ). Therefore, graphene has broad application prospects in flex...

Claims

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Application Information

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IPC IPC(8): C07C69/24C07C67/14C01B32/19B01F17/34B01F17/00C09K23/00C09K23/34
CPCC07C69/24C07C67/14C01B32/19C09K23/00
Inventor 张建安张康民吴明元吴庆云杨建军刘久逸
Owner 合肥艾克思维新材料科技有限公司
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