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Physical stripping graphene-plastic composite and preparation method

A technology of physical peeling and composite materials, which is applied in the field of thermally conductive plastics, can solve the problems of unsatisfactory thermal conductivity and decreased thermal conductivity of resin materials, and achieve the effects of reasonable proportioning, excellent thermal conductivity, and broad application prospects

Inactive Publication Date: 2016-10-12
上海多希石墨烯材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of the resin material itself is not ideal, and high thermal conductivity fillers need to be added to improve the thermal conductivity of the material
Existing graphene-plastic composite materials use graphene oxide or reduced graphene oxide, because graphene oxide and reduced graphene oxide contain a large number of organic functional groups, resulting in a decrease in thermal conductivity

Method used

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preparation example Construction

[0027] A kind of preparation method of above-mentioned physical exfoliation graphene-plastic composite material, comprising:

[0028] Step 1. Put the plastic masterbatch of 40-90 parts by weight into a vacuum drying oven, and dry at 80-110°C for 6-11 hours;

[0029] Step 2. Add the dried plastic masterbatch into the silo of the twin-screw extrusion granulator, set the temperature in the processing area to 130-270°C, and the speed of the twin-screw to 700-1000rpm;

[0030] Step 3, take 5-60 parts by weight of physically exfoliated graphene, add it from the first zone, and add 1-5 parts by weight of auxiliary agents from the second zone and the third zone respectively;

[0031] Step 4, blending, extruding and granulating.

[0032] Wherein: the coupling agent in the auxiliary agent in step three is added from the second zone, and the antioxidant is added from the third zone.

Embodiment 1

[0034] Take 60 parts of polyamide 6 masterbatches, put them into a vacuum drying oven and dry them at 105°C for 8 hours. Add the dried polyamide 6 into the silo of the twin-screw extrusion granulator, and set the processing temperature in the first zone to 220°C, the processing temperature in the second zone to 230°C, the processing temperature in the third zone to 240°C, and the processing temperature in the fourth zone The temperature is 250°C, the processing temperature in the granulation die head area is 235°C, and the screw speed is 800rpm. Take 37 parts of 50-mesh physically exfoliated graphene and add it from the first zone, add 2 parts of silane coupling agent from the second zone, and add 1 part of diphenylamine from the third zone, and carry out blending extrusion granulation.

Embodiment 2

[0036] Take 60 parts of polyamide 66 masterbatch, put it into a vacuum drying oven and dry it at 110°C for 5 hours. Put the dried polyamide 66 into the silo of the twin-screw extrusion granulator, and set the processing temperature in the first zone to 240°C, the processing temperature in the second zone to 250°C, the processing temperature in the third zone to 260°C, and the processing temperature in the fourth zone The temperature is 270°C, the processing temperature in the granulation die head area is 265°C, and the screw speed is 800rpm. Take 37 parts of 50-mesh physically exfoliated graphene and add it from the first zone, add 2 parts of silane coupling agent from the second zone, and add 1 part of diphenylamine from the third zone, and carry out blending extrusion granulation.

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Abstract

The invention relates to the technical field of heat conducting plastic and provides a physical stripping graphene-plastic composite which comprises the following components in percentage by weight: 5-60% of heat conducting powder, 40-90% of plastic and 1-5% of auxiliary, wherein the heat conducting powder is physical stripping graphene which is mixed by a twin-screw extruder to prepare graphene-plastic composite masterbatch; the particle size of the graphene is 50-5000 meshes, the layer number of the graphene is 2-50, and the carbon content of the graphene is 85-99.8%. The invention also provides a preparation method of the composite, which comprises the following steps: drying the plastic masterbatch; setting the working temperature of the twin-screw extruder and the twin-screw speed; adding the graphene from an area I; adding a coupling agent from an area II; adding an antioxidant from an area III; and performing blending, extrusion and granulation. The physical stripping graphene-plastic composite and the preparation method thereof have the following beneficial effects: through physical stripping of graphene and plastic compounding preparation, the material has excellent heat conducting property and is reasonable in proportion, and the technology is simple and suitable for mass production and has a broad application prospect.

Description

Technical field [0001] The invention relates to the technical field of thermally conductive plastics, and in particular to a physically exfoliated graphene-plastic composite material and a preparation method. Background technique [0002] Graphene has shown excellent properties in thermodynamics. Since the moment of its birth, the measurement of thermal conductivity of single-layer graphene has always attracted people's attention. From the perspective of molecular physics, phonon propagation is simulated in a single layer of carbon atoms, and the average thermal conductivity of graphene is 6000W / (m·K). The discovery of graphene and the determination of its thermal conductivity caused a great shock in the heat transfer community. Graphene, as the material with the best thermal conductivity among known materials in the world, represents the future of the entire heat transfer discipline and field. At present, the research on graphene is still in full swing. Through in-depth d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08L23/06C08L27/06C08L69/00C08L23/12C08L59/00C08L29/04C08L67/02C08K7/00C08K3/04B29C47/92B29C48/92
CPCC08K7/00B29C48/92B29C2948/92704C08K3/04C08K2201/003C08L77/02C08L77/06C08L23/06C08L27/06C08L69/00C08L23/12C08L59/00C08L29/04C08L67/02
Inventor 何勇赫恩龙
Owner 上海多希石墨烯材料科技有限公司
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