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Preparation method of modified graphene oxide/natural rubber high-heat-conducting composite material

A technology of natural rubber and composite materials, which is applied in the field of preparation of modified graphene oxide/natural rubber high thermal conductivity composite materials, which can solve problems such as low thermal conductivity, improve thermal conductivity, facilitate thermal conduction network, and improve thermal conductivity Promoted effect

Active Publication Date: 2020-08-07
ZHONGBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention designs a preparation method of modified graphene oxide / natural rubber high thermal conductivity composite material, the main problem to be solved is to improve the low thermal conductivity of natural rubber materials while maintaining the good mechanical properties of natural rubber itself, The preparation method has the characteristics of simplicity, high efficiency, low cost and easy industrial production

Method used

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  • Preparation method of modified graphene oxide/natural rubber high-heat-conducting composite material
  • Preparation method of modified graphene oxide/natural rubber high-heat-conducting composite material
  • Preparation method of modified graphene oxide/natural rubber high-heat-conducting composite material

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Embodiment 1

[0038] A preparation method of modified graphene oxide / natural rubber high thermal conductivity composite material, comprising the following steps:

[0039] (1) Preparation of hexagonal boron nitride nanosheets by ultrasonic assisted exfoliation

[0040] Weigh 10 g of hexagonal boron nitride and pretreat it in an oven at 120° C. for 12 hours. Measure 500ml of absolute ethanol, mix ethanol and isopropanol according to the volume ratio of 5:3, use stirring method to make the mixture uniform, then add the dried hexagonal boron nitride into the mixed solvent, and stir thoroughly; Add the mixed solution into the three-necked flask, put the three-necked flask into the ultrasonic reaction apparatus, and configure the mechanical stirring device at the same time, set the temperature of the ultrasonic reaction apparatus to 60°C, the ultrasonic power to 120W, and the reaction time to 12h, turn on the ultrasonic reaction apparatus and mechanical stirring device. During the reaction proc...

Embodiment 2

[0047] A preparation method of modified graphene oxide / natural rubber high thermal conductivity composite material, comprising the following steps:

[0048] (1) Preparation of hexagonal boron nitride nanosheets by ultrasonic assisted exfoliation

[0049] Weigh 10 g of hexagonal boron nitride and pretreat it in an oven at 100° C. for 24 hours. Measure 500ml of absolute ethanol, mix ethanol and ethanolamine according to the volume ratio of 5:2, use stirring method to make the mixture even, then add the dried hexagonal boron nitride into the mixed solvent, stir fully; mix Add the solution into the three-necked flask, put the three-necked flask into the ultrasonic reaction apparatus, and configure the mechanical stirring device at the same time, set the temperature of the ultrasonic reaction apparatus to 80°C, the ultrasonic power to 200W, and the reaction time to 8h, turn on the ultrasonic reaction apparatus and mechanical Stirring device. During the reaction process, 0.3 g of ...

Embodiment 3

[0056] A preparation method of modified graphene oxide / natural rubber high thermal conductivity composite material, comprising the following steps:

[0057] (1) Preparation of hexagonal boron nitride nanosheets by ultrasonic assisted exfoliation

[0058] Weigh 10 g of hexagonal boron nitride and pretreat it in an oven at 80° C. for 36 h. Measure 500ml of absolute ethanol, mix ethanol and isopropanol at a volume ratio of 5:1, and stir to make the mixture even, then add the dried hexagonal boron nitride into the mixed solvent, and stir thoroughly; Add the mixed solution into the three-necked flask, put the three-necked flask into the ultrasonic reaction device, and configure the mechanical stirring device at the same time, set the temperature of the ultrasonic reaction device to 30°C, the ultrasonic power to 200W, and the reaction time to 6h, turn on the ultrasonic reaction device and mechanical stirring device. During the reaction process, 0.5 g of silane coupling agent KH570...

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Abstract

The invention belongs to the field of novel heat-conducting materials, and particularly relates to a preparation method of a modified graphene oxide / natural rubber high-heat-conducting composite material. The preparation method comprises the following steps: 1) modifying a prepared hexagonal boron nitride nanosheet, and mixing the modified hexagonal boron nitride nanosheet with a graphene oxide dispersion liquid to form a hexagonal boron nitride nanosheet modified graphene oxide dispersion liquid; 2) blending the hexagonal boron nitride nanosheet modified graphene oxide dispersion liquid withnatural latex, and performing demulsifying to form masterbatch; and 3) plastifying, mixing and vulcanizing the masterbatch to form the high-thermal-conductivity natural rubber composite material. Hexagonal boron nitride nanosheets and graphene oxide heat-conducting composite particles with special two-dimensional structures are prepared, and directional arrangement of the hexagonal boron nitride nanosheets and graphene oxide heat-conducting composite particles is controlled. Through the means, a heat conduction network can be formed in a matrix, the heat conduction performance of the natural rubber composite material can be improved to 0.48 W / m.K, meanwhile, the material keeps good mechanical performance, and the natural rubber composite material has wide application prospects in the fields of electronic packaging and tires.

Description

technical field [0001] The invention belongs to the field of new heat-conducting materials, in particular to a preparation method of a modified graphene oxide / natural rubber high heat-conducting composite material. Background technique [0002] Natural rubber-based polymer composites have a series of excellent physical properties, such as good resilience, insulation, water barrier and plasticity. In addition, they also have excellent chemical properties such as acid resistance, alkali resistance, and heat resistance, and are widely used in transportation, medical and health, scientific experiments and other fields. However, the thermal conductivity of rubber-based polymer materials is generally not high, which limits their applications in certain fields. If endowed with certain thermal conductivity, their application in the field of electronic packaging can be greatly improved. Natural rubber-based polymer composites with good mechanical properties, thermal conductivity and...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08K9/06C08K7/00C08K3/38C08K9/02C08K3/04C09K5/14
CPCC08K9/06C08K7/00C08K3/38C08K9/02C08K3/042C09K5/14C08K2201/011C08K2003/385C08L7/00
Inventor 张志毅赵贵哲杨云帆刘亚青
Owner ZHONGBEI UNIV
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