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Heat-conduction electric-insulation rubber-plastic composite material and preparation method thereof

A heat-conducting insulating filler and composite material technology, applied in the chemical industry, can solve the problems of composite materials such as decreased mechanical properties and poor compatibility, and achieve the effects of improved mechanical properties, improved thermal conductivity, and good mechanical properties

Inactive Publication Date: 2015-09-09
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the poor compatibility between the inorganic powder filler and the organic matrix, the addition of a large amount of inorganic powder filler will greatly reduce the mechanical properties of the composite material.

Method used

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  • Heat-conduction electric-insulation rubber-plastic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the thermally conductive and insulating rubber-plastic composite material in this embodiment is as follows:

[0026] (1) 0.5 gram of coupling agent (A-172) is dissolved in the ethanol-water solution of 75% ethanol mass fraction in 250ml, is mixed with coupling agent ethanol-water solution; °C, react in 250ml sodium hydroxide concentrated solution with a molar concentration of 2mol / L for 18h, then filter and dry. Then put in the coupling agent ethanol-water solution and react at 60° C. for 4 hours to obtain the aluminum nitride after grafting the coupling agent on the surface.

[0027] (2) After plasticizing 20 grams of natural rubber (NR) in the internal mixer for 20 minutes, add the aluminum nitride (AlN) obtained in (1) into the internal mixer and continue mixing for 10 minutes, and finally add 40 grams of EVA, 2 grams Antioxidant 1010 and 1 gram of vulcanizing agent (double 2.5) were placed in an internal mixer and mixed evenly, and then th...

Embodiment 2

[0029] The preparation method of the thermally conductive and insulating rubber-plastic composite material in this embodiment is as follows:

[0030] (1) 1.5 gram coupling agent (A-172) is dissolved in the ethanol mass fraction of 250ml and is in the ethanol-water solution of 85%, is mixed with coupling agent ethanol-water solution; React in 250ml of concentrated sodium hydroxide solution with a temperature of 100°C and a molar concentration of 2.5mol / L for 15 hours, then filter and dry. Then put in the coupling agent ethanol-water solution and react at 70° C. for 5 hours to obtain the hexagonal plate-shaped boron nitride grafted with the coupling agent on the surface.

[0031] (2) After plasticizing 60 grams of ethylene-propylene-diene rubber (EPDM) and silicone rubber (MVQ) in an internal mixer for 20 minutes, add the hexagonal flake boron nitride (h-BN) obtained in step (1) into the compact The mixer continued to mix for 10 minutes, and finally added 30 grams of polyethyle...

Embodiment 3

[0033] The preparation method of the thermally conductive and insulating rubber-plastic composite material in this embodiment is as follows:

[0034] (1) 3 gram coupling agents (A-172) are dissolved in the ethanol mass fraction of 250ml and be in the ethanol-water solution of 90%, be mixed with coupling agent ethanol-water solution; 50 gram hexagonal flake boron nitride (h -BN) and alumina (Al 2 o 3 ) was reacted in 250ml of concentrated sodium hydroxide solution with a temperature of 120°C and a molar concentration of 4mol / L for 18h in advance, then filtered and dried. Then put in the coupling agent ethanol-water solution and react at 80° C. for 4 hours to obtain the hexagonal plate-shaped boron nitride grafted with the coupling agent on the surface.

[0035] (2) After plasticizing 60 grams of methyl vinyl silicone rubber (MVQ) in the internal mixer for 25 minutes, add the hexagonal flake boron nitride (h-BN) obtained in (1) into the internal mixer and continue mixing for 1...

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Abstract

The invention discloses a heat-conduction electric-insulation rubber-plastic composite material and a preparation method thereof. The heat-conduction electric-insulation rubber-plastic composite material is prepared from the following raw materials in parts by mass: 40-80 parts of rubber matrix, 0-50 parts of heat-conduction electric-insulation filler, 10-40 parts of plastic matrix, 2-5 parts of vulcanizing agent, 3-7 parts of antioxidant and 2-5 parts of silane coupling agent. The preparation method comprises the following steps: carrying out surface modification on the heat-conduction electric-insulation filler by using the coupling agent, carrying out banburying and mixing, carrying out cold-press molding, and carrying out high-temperature vulcanization. The heat-conduction electric-insulation rubber-plastic composite material has higher heat conductivity under the condition of lower filler amount, and maintains excellent electric insulation properties. The blending of the rubber and plastic materials can enhance the mechanical properties of the composite material, and can satisfy the requirements for heat-conducting property and electric-insulating property in a complex mechanical environment.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a composite material composition, in particular to a heat-conducting and insulating rubber-plastic composite material and a preparation method thereof. Background technique [0002] Silicone rubber has good heat resistance and is widely used in various fields in the national economy and defense industry. Methyl vinyl silicone rubber is a type of silicone rubber that can withstand high and low temperatures. It can be used for a long time at -50-250°C and has excellent electrical insulation properties. Since its development, it has been widely used in automobile manufacturing, daily necessities, electrical and electronic, and aerospace, but its own anti-damping performance is poor. Cheng Qingmin and others used rubber-plastic mixture to improve its damping mechanical properties, but the thermal conductivity was low, which could not meet the requirements of complex mechanical environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L7/00C08L23/16C08L9/06C08L23/08C08L23/06C08L23/12C08K9/06C08K3/38C08K3/28C08K7/10C08K3/22
Inventor 杨文彬范敬辉廖治强邢涛张凯
Owner SOUTHWEAT UNIV OF SCI & TECH
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