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High-pressure atomization method for preparing graphene dispersion and its polymerization method for preparing graphene nylon

A graphene dispersion, high-pressure atomization technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems that the performance of graphene nylon cannot reach the ideal state, no graphene is reflected, and it is difficult to disperse, and the number of layers can be reached. Less, better dispersion effect, lower requirement effect

Active Publication Date: 2021-01-05
三门县鸿远塑业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, graphene is added to nylon to further increase the performance of nylon, but the number of graphene layers in existing graphene nylon is large, and because of the van der Waals force between graphene material layers, it is easy to reunite and is very difficult Difficult to disperse in various solvents. The number of graphene layers in the graphene dispersion prepared by the prior art is mostly about 50 layers. Therefore, the excellent performance of graphene is not fully reflected, which greatly limits its application, resulting in The performance of the prepared graphene nylon is not ideal

Method used

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  • High-pressure atomization method for preparing graphene dispersion and its polymerization method for preparing graphene nylon

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Embodiment 1

[0028] The preparation of the graphene dispersion liquid of the present invention comprises the following steps: first calcining the graphite powder at a high temperature of 1550° C. to obtain the expanded graphite powder; then adding the above-mentioned expanded graphite powder into distilled water, fully stirring, That is to obtain the expanded graphite aqueous solution; and then through the ultra-high pressure pump 1 with a pressure of 150 MPa, the above-mentioned expanded graphite aqueous solution is atomized through the atomizing head 4 in a circular and sudden pressure reduction, and the graphene dispersion is obtained.

[0029] Further, the specific steps of the circulating and sudden pressure-reducing atomization are as follows: Utilize a 150MPa ultra-high pressure pump 1 to transport the above-mentioned expanded graphite aqueous solution in the reflux pool 2 to the atomization chamber 3 at a pressure of 1MPa. The atomizing head 4; the above-mentioned expanded graphite ...

Embodiment 2

[0035] The preparation of the graphene dispersion according to the present invention comprises the following steps: first calcining the graphite powder at a high temperature of 1650° C. to obtain the expanded graphite powder; then adding the above-mentioned expanded graphite powder into distilled water, fully stirring, That is to obtain the expanded graphite aqueous solution; and then through the ultra-high pressure pump 1 with a pressure of 170 MPa, the above-mentioned expanded graphite aqueous solution is atomized through the atomizing head 4 in a circular and sudden pressure reduction, and the graphene dispersion is obtained.

[0036] Further, the specific steps of the circulation type and sudden pressure-reducing atomization are as follows: Utilize a 170MPa ultra-high pressure pump 1 to transport the above-mentioned expanded graphite aqueous solution in the reflux pool 2 to the atomization chamber 3 at a pressure of 6MPa. The atomizing head 4; the above-mentioned expanded g...

Embodiment 3

[0042] The preparation of the graphene dispersion according to the present invention comprises the following steps: first calcining the graphite powder at a high temperature of 1850° C. to obtain the expanded graphite powder; then adding the above-mentioned expanded graphite powder into distilled water, fully stirring, That is to obtain the expanded graphite aqueous solution; and then through the ultra-high pressure pump 1 with a pressure of 200 MPa, the above-mentioned expanded graphite aqueous solution is atomized through the atomizing head 4 in a circular and sudden pressure reduction, and the graphene dispersion is obtained.

[0043] Further, the specific steps of the circulating and sudden pressure-reducing atomization are as follows: Utilize a 200MPa ultra-high pressure pump 1 to transport the above-mentioned expanded graphite aqueous solution in the reflux pool 2 to the atomization chamber 3 at a pressure of 10MPa. The atomizing head 4; the above-mentioned expanded graph...

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Abstract

The invention relates to a high-pressure atomization method for preparation of a graphene dispersion, and a polymerization method for preparing graphene nylon from the graphene dispersion, belonging to the technical field of nylon preparation. The methods comprise the following steps: calcining graphite powder at a high temperature so as to obtain expanded graphite powder; then adding the expandedgraphite powder into distilled water and carrying out sufficient stirring so as to obtain an aqueous solution of expanded graphite; subjecting the aqueous solution of expanded graphite to circulatingand abrupt pressure-reduction atomization via an atomization head with the aid of an ultrahigh-pressure pump so as to obtain the graphene dispersion; and adding the graphene dispersion into a polymerization system of caprolactam so as to obtain few layers of graphene and graphene nylon with excellent performance.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-pressure atomization method for preparing graphene dispersion liquid and a polymerization method for preparing graphene nylon. Background technique [0002] Nylon has excellent comprehensive properties such as good mechanical properties, good flexibility, oil resistance, self-lubrication, etc., and is widely used in the fields of automobile industry, electronic and electrical industry, mechanical equipment, construction industry and so on. [0003] Graphene is a new material with a single-layer sheet structure composed of carbon atoms, and has the characteristics of high strength, large specific surface area, high chemical reactivity, and high filling. At the same time, graphene is currently the thinnest and The hardest nano material, the thermal conductivity is as high as 5300W / (m.k), and the volume resistance is only 10 -6 Ω·cm, which is the material with the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/14C08G69/16C08K3/04C01B32/184
CPCC08G69/14C08G69/16C08K3/04
Inventor 毛惠敏何曙辉俞利芳何政彤
Owner 三门县鸿远塑业有限公司
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