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Graphene nylon composite material and preparation method thereof

A nylon composite material and graphene technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of low thermal conductivity and reduce other properties of polymer materials, and achieve high compatibility and interface adhesion Strong, good heat conduction channel effect

Pending Publication Date: 2018-11-16
WUHU YUANKUI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional thermally conductive composite materials generally use Si3N4, SiN, AlN and BN as thermally conductive fillers, but because of their low thermal conductivity, high thermal conductivity can only be achieved with high additions, but this will inevitably reduce the high thermal conductivity. Other properties of the molecular material itself

Method used

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  • Graphene nylon composite material and preparation method thereof
  • Graphene nylon composite material and preparation method thereof

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Effect test

Embodiment 1

[0028] The preparation method of modified graphene comprises the following steps:

[0029] 1) graphene is added in the ethanol solution of citric acid and carries out ultrasonic dispersion, obtains the alcohol dispersion liquid of carboxylated graphene;

[0030] 2) Add sodium metaaluminate to the alcohol dispersion of carboxylated graphene, then carry out stirring reaction, centrifuge after the reaction finishes, obtain filtrate;

[0031] 3) Heat the filtrate to 400°C at a heating rate of 1°C / min under a nitrogen atmosphere, and keep it warm for 3 hours. The mass ratio of graphene to citric acid is 1:6, and the mass ratio of graphene to sodium metaaluminate is 1:3.

Embodiment 2

[0033] The preparation method of modified graphene comprises the following steps:

[0034] 1) graphene is added in the propanol solution of citric acid and carries out ultrasonic dispersion, obtains the alcohol dispersion liquid of carboxylated graphene;

[0035] 2) Add sodium metaaluminate to the alcohol dispersion of carboxylated graphene, then carry out stirring reaction, centrifuge after the reaction finishes, obtain filtrate;

[0036] 3) Heat the filtrate to 600°C at a heating rate of 5°C / min under nitrogen atmosphere, and keep it warm for 1h. The mass ratio of graphene to citric acid is 1:2, and the mass ratio of graphene to sodium metaaluminate is 1:7.

Embodiment 3

[0038] A graphene nylon composite material, calculated in parts by weight, comprises the following raw materials:

[0039] 80 parts of nylon, 7 parts of carbon fiber, 24 parts of modified graphene of embodiment 1, 6 parts of maleic anhydride grafted ethylene-octene copolymers, 1.2 parts of styrene-maleic anhydride copolymers, 0.4 parts of polyethylene wax and 0.4 part of hindered phenolic antioxidant.

[0040] The preparation method of graphene nylon composite material:

[0041] 1) Nylon, maleic anhydride grafted ethylene-octene copolymer, carbon fiber and the modified graphene of Example 1 were mixed and stirred uniformly, then added to a twin-screw extruder, and extruded at 260°C pellets to obtain thermally conductive nylon masterbatches;

[0042] 2) drying the heat-conducting nylon masterbatch in step 1), and then mixing and stirring evenly with styrene-maleic anhydride copolymer, hindered phenolic antioxidant and polyethylene wax to obtain a mixed material;

[0043] 3) ...

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Abstract

The invention provides a graphene nylon composite material and a preparation method thereof. The graphene nylon composite material comprises the following raw materials in parts by weight: 70-90 partsof nylon, 5-10 parts of carbon fiber, 20-30 parts of modified graphene, 4-8 parts of a flexibilizer, 0.6-1.8 parts of a compatilizer, 0.2-0.6 parts of a lubricant, and 0.2-0.6 parts of an anti-oxidant; and the modified graphene is obtained by graphene, citric acid and sodium metaaluminate. The preparation method is characterized in that the above raw materials are mixed by batches and are subjected to twin-screw extruded granulation. The nylon composite material has good heat conduction effect and excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a graphene nylon composite material and a preparation method thereof. Background technique [0002] Nylon has excellent comprehensive properties such as good mechanical properties, good flexibility, wear resistance, 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. Due to its advantages of short processing cycle, low production cost, long service life and high degree of product design freedom, it has been more and more widely used. In recent years, its application in thermal conductive polymer composite materials is particularly prominent. For example, DSM produces The high-power LED radiator has been generally recognized by the market. [0003] Thermally conductive materials are widely used in heat transfer engineering, ...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L51/06C08K7/06C08K9/04C08K9/02C08K3/04C09K5/14
CPCC08L77/00C08L51/06C08K7/06C08K9/04C08K9/02C08K3/042
Inventor 章波郭元
Owner WUHU YUANKUI NEW MATERIAL TECH CO LTD
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