High thermal conductive and insulating polymer composite and preparing method and application thereof

A technology of insulating polymers and composite materials, applied in the field of preparation of polymer composite materials, can solve the problems of limited application, difficult collection of products, difficult control, etc., and achieve the effect of ensuring mechanical strength, simple operation and low cost

Inactive Publication Date: 2015-09-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation of hexagonal boron nitride nanosheets has been a problem that limits its application
The process of mechanical stripping is complicated and the yield is extremely low; the conditions of vapor deposition are harsh, the operation process is highly toxic and difficult to control; the traditional liquid stripping method is easy to operate, but the yield is extremely low, and the product is difficult to collect
The above methods are difficult to achieve large-scale production of hexagonal boron nitride nanosheets, which limits its application in the field of high thermal conductivity insulating polymer composites

Method used

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  • High thermal conductive and insulating polymer composite and preparing method and application thereof
  • High thermal conductive and insulating polymer composite and preparing method and application thereof
  • High thermal conductive and insulating polymer composite and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Preparation of hexagonal boron nitride nanosheets

[0041] (1) Stir and mix 1 g of hexagonal boron nitride and 500 ml of isopropanol, and perform ultrasonic treatment in an ultrasonic cleaning machine with a power of 200 w in the isopropanol solution for 6 hours to obtain a mixed solution.

[0042] (2) The above mixture was left to stand for 48 hours under natural conditions, filtered to remove isopropanol, washed with acetone for 3 times, and treated in a vacuum oven at a temperature of 90° C. for 9 hours to collect high-yield hexagonal boron nitride nanosheets.

[0043] 2) Preparation of high thermal conductivity insulating polymer composites

[0044] 640g of nylon and 60g of nano-boron nitride treated above were added and mixed in a high-speed mixer for 5 minutes. At a rotation speed of 30rpm and a temperature of 240°C, they were extruded by twin-screws to obtain high thermal conductivity and insulation nylon 6 composite materials.

Embodiment 2

[0046] 1) Preparation of hexagonal boron nitride nanosheets

[0047] (1) Stir and mix 0.1 g of hexagonal boron nitride and 50 ml of isopropanol, and ultrasonically treat at 100w for 4 hours in the isopropanol solution to obtain a mixed solution.

[0048] (2) The mixture was left to stand for 24 hours under natural conditions, filtered to remove isopropanol, washed twice with acetone, and treated in a vacuum oven at a temperature of 50° C. for 5 hours to collect boron nitride nanosheets with a high yield.

[0049] 2) Preparation of high thermal conductivity insulating polymer composites

[0050] 660g of nylon and 40g of the above-mentioned nano-boron nitride were added and mixed in a high-speed mixer for 5 minutes. At a speed of 30rpm and a temperature of 260°C, they were extruded by a single screw to obtain a high thermal conductivity and insulation nylon 66 composite material.

Embodiment 3

[0052] 1) Preparation of hexagonal boron nitride nanosheets

[0053](1) Stir and mix 10 g of hexagonal boron nitride, 500 ml of isopropanol and 500 ml of aqueous solution containing 0.5% sodium lauryl sulfate, and ultrasonically treat at 1000w for 72 hours in the isopropanol solution to obtain a mixed solution.

[0054] (2) The mixture was left to stand for 72 hours under natural conditions, filtered to remove isopropanol, washed 5 times with acetone, and treated in a vacuum oven at 120° C. for 10 hours to collect boron nitride nanosheets with high yield.

[0055] 2) Preparation of high thermal conductivity insulating polymer composites

[0056] Mix 90g of polycarbonate with 10g of nano-boron nitride treated above in a mixer for 10min, extrude with a micro-screw at a speed of 60rpm and a temperature of 270°C to obtain a polycarbonate composite material with high thermal conductivity and insulation.

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Abstract

The invention discloses a high thermal conductive and insulating polymer composite and a preparing method and application thereof. The preparing method is characterized in that 0.1-1.0 part of hexagonal boron nitride is evenly stirred and mixed with 50-1000 parts of organic solvent, and is added into an ultrasonic cleaner with the power ranging from 100 w to 1000 w or an ultrasonic cell disruptor, ultrasonic treatment is carried out for 4 hours to 72 hours, and mixed liquor is obtained; standing is carried out on the mixed liquor for 24 hours to 72 hours, after filtering or rotary evaporating is carried out, a product is cleaned for twice to five times by using acetone, and a boron nitride nano-sheet with the higher yield is obtained; 60-90 parts of a polymer matrix and 40-10 parts of the boron nitride nano-sheet are added into a high-speed blender mixer, the temperature ranges from 200 DEG C to 300 DEG C, the rotary speed ranges from 30 rpm to 60 rpm, mixing is carried out for 5 minutes to 10 minutes, and granulates are extruded by a screw extruder; the high thermal conductive and insulating polymer composite can be obtained through smelting and forming. According to the high thermal conductive and insulating polymer composite, the mechanical property can be maintained, and meanwhile the thermal conductivity is improved maximally.

Description

Technical field: [0001] The invention relates to a high thermal conductivity insulating polymer composite material and its preparation method and application, belonging to the field of polymer composite material preparation. Background technique: [0002] With the continuous advancement of science and technology, electronic components continue to be thinner and smaller, and the operating frequency continues to increase. The heat generated needs to be dissipated quickly. More and more occasions require the use of thermally conductive insulating materials. [0003] Polymer materials are widely used due to their light weight, easy processing and high mechanical properties. However, the thermal conductivity of polymer is only 0.1-0.5W / m. K, unable to meet the heat dissipation requirements of electronic and electronic devices and components. At present, the common method of preparing high thermal conductivity insulating polymer materials is to add high thermal conductivity cera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L81/02C08L77/02C08L77/06C08L79/08C08K9/00C08K7/00C08K3/38
CPCC08K9/00C08K3/38C08K7/00C08K2003/385C08K2201/011
Inventor 邹华维李生钊梁梅陈洋杨团团
Owner SICHUAN UNIV
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