Heat-conducting polymer composite material and preparation method thereof

A technology of composite materials and polymers, which is applied in the field of thermally conductive polymer composite materials and their preparation, and can solve problems affecting the performance of thermally conductive potting adhesives, etc.

Pending Publication Date: 2022-05-03
SUZHOU SIDIKE NEW MATERIALS SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if you want to achieve a satisfactory thermal conductivity effect, you need a large amount of inorganic fillers to fill, which will affect the performance of the thermal conductivity potting compound
[0007] It can be seen that it is difficult for traditional polymer-based thermal conductive materials to simultaneously achieve the purpose of simultaneously ta

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  • Heat-conducting polymer composite material and preparation method thereof
  • Heat-conducting polymer composite material and preparation method thereof
  • Heat-conducting polymer composite material and preparation method thereof

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[0045] One embodiment of the present invention provides a method for preparing a thermally conductive polymer composite material, which includes the following steps S10 to S20.

[0046] Step S10: Mix the inorganic filler modified by the coupling agent and the boron nitride nanosheets in a solvent, disperse evenly, add nanofibers, disperse evenly, add an adhesive and an initiator, mix evenly, and form a mixed solution.

[0047]After mixing the inorganic filler modified by the coupling agent and the boron nitride nanosheet, the boron nitride nanosheet has a multi-layer laminated structure, and the inorganic filler modified by the coupling agent will be anchored on the surface of the boron nitride nanosheet. Can effectively enhance the heat transfer path. In a specific example, the inorganic filler modified by the coupling agent and the boron nitride nanosheets are mixed in a solvent, and the dispersion method is ultrasonic. Further, the time of ultrasound is 12h-72h.

[0048] ...

Embodiment 1

[0099] 1. Preparation of inorganic filler modified by coupling agent:

[0100] Select Al with a particle size of 30nm 2 o 3 As the inorganic filler, the silane coupling agent KH-560 is used as the coupling agent. Mix the inorganic filler and the coupling agent in deionized water. The mass ratio of the inorganic filler to the coupling agent is 3:10. Ultrasound for 8 hours, wash and dry to obtain Inorganic filler modified by coupling agent.

[0101] 2. Preparation of boron nitride nanosheets:

[0102] Mix hexagonal boron nitride and glucose with a mass ratio of 1:5 in water, put them into a ball mill, use zirconium beads with a diameter of 0.5mm as the ball milling medium, mill for 24 hours, and the ball milling speed is 1500rpm, wash and dry to obtain boron nitride Nanosheets.

[0103] 3. Preparation of thermally conductive polymer composite materials:

[0104] Add the inorganic filler modified by the coupling agent obtained in step 1 and the boron nitride nanosheets obtai...

Embodiment 2

[0107] 1. Preparation of inorganic filler modified by coupling agent:

[0108] Select Al with a particle size of 30nm 2 o 3 As the inorganic filler, the silane coupling agent KH-560 is used as the coupling agent. Mix the inorganic filler and the coupling agent in deionized water. The mass ratio of the inorganic filler to the coupling agent is 3:10. Ultrasound for 8 hours, wash and dry to obtain Inorganic filler modified by coupling agent.

[0109] 2. Preparation of boron nitride nanosheets:

[0110] Mix hexagonal boron nitride and glucose with a mass ratio of 1:5 in water, put them into a ball mill, use zirconium beads with a diameter of 0.5mm as the ball milling medium, mill for 24 hours, and the ball milling speed is 1500rpm, wash and dry to obtain boron nitride Nanosheets.

[0111] 3. Preparation of thermally conductive polymer composite materials:

[0112] Add the inorganic filler modified by the coupling agent obtained in step 1 and the boron nitride nanosheets obtai...

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Abstract

The invention relates to a preparation method of a heat-conducting polymer composite material, which comprises the following steps: mixing a coupling agent modified inorganic filler and boron nitride nanosheets in a solvent, uniformly dispersing, adding nanofibers, uniformly dispersing, adding an adhesive and an initiator, and uniformly mixing to form a mixed solution; and carrying out electrostatic spinning and curing on the mixed solution. According to the method, the heat transmission of the heat-conducting polymer composite material can be improved, the heat-conducting property is improved, and meanwhile, the heat-conducting polymer composite material prepared by the method also has good dielectric property and electrical insulation property.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of electronic equipment, in particular to a heat-conducting polymer composite material and a preparation method thereof. Background technique [0002] With the rapid development of all kinds of electronic equipment, microelectronics technology tends to be miniaturized and multifunctional, and due to the continuous increase of its operating frequency, a large amount of heat is generated. For example, in some ultra-high performance computers, the processor module The power can reach 200W~300W. If the heat cannot be dissipated in time, or the heat is higher than the maximum temperature threshold of electronic equipment, its stability and working efficiency will be greatly reduced, which will seriously affect the reliability and service life of the equipment. Therefore, the ability to dissipate heat in a timely and efficient manner has become a key factor affecting whether the electronic devi...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/42D01F1/10D01F6/94
CPCD04H1/728D04H1/42D01F1/10D01F6/94
Inventor 金闯韩妹娜尹锦
Owner SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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