Polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material as well as preparation method and application thereof

A polydimethylsiloxane-based, thermally conductive composite material technology, applied in the field of thermal interface materials, can solve problems such as environmental protection, short circuit of electronic components, and reduce gallium usage, achieving high thermal conductivity, good mechanical properties, The effect of excellent performance

Pending Publication Date: 2021-09-03
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquid metal has the following problems as a thermal interface material: (1) It is used in a large amount during use and is not environmentally friendly; (2) Liquid metal has strong fluidity, and liquid metal may overflow from the gap between the chip and the heat sink, causing electronic components Short circuit; (3) The annual output of gallium is less than 300 tons, and the use of gallium needs to be reduced as much as possible

Method used

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  • Polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material as well as preparation method and application thereof
  • Polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material as well as preparation method and application thereof
  • Polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material, comprising the following components:

[0031] Silicone oil 14.97g

[0032] Spherical boron nitride 15g

[0033] Gallium Indium Alloy 5g

[0034] Catalyst 0.03g;

[0035] Wherein, the silicone oil is composed of vinyl silicone oil, hydrogen-containing silicone oil and inhibitor in a mass ratio of 2500:500:1, and the vinyl silicone oil is selected from RH-100 of Zhejiang Runhe Organic Silicon New Material Co., Ltd.; The hydrogen-containing silicone oil is selected from RH-35 and RH-H6 of Zhejiang Runhe Silicone New Material Co., Ltd., wherein the mass ratio of RH-35 and RH-H6 is 4:5; the inhibitor is 2-phenyl-3 -butyn-2-ol;

[0036] The average particle size of the spherical boron nitride is 90 μm;

[0037] The gallium-indium alloy is a Ga:In mass ratio of 3:1;

[0038] The catalyst is CAT-PL-56.

[0039] The preparation process of the polydimethylsiloxane-...

Embodiment 2

[0044] A polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material, comprising the following components:

[0045] Silicone oil 14.97g

[0046] Spherical boron nitride 15g

[0047] Gallium Indium Alloy 10g

[0048] Catalyst 0.03g;

[0049] Wherein, the silicone oil is composed of vinyl silicone oil, hydrogen-containing silicone oil and inhibitor in a mass ratio of 2500:500:1, and the vinyl silicone oil is selected from RH-100 of Zhejiang Runhe Organic Silicon New Material Co., Ltd.; The hydrogen-containing silicone oil is selected from RH-35 and RH-H6 of Zhejiang Runhe Silicone New Material Co., Ltd., wherein the mass ratio of RH-35 and RH-H6 is 4:5; the inhibitor is 2-phenyl-3 -butyn-2-ol;

[0050] The average particle size of the spherical boron nitride is 90 μm;

[0051] The gallium-indium alloy is a Ga:In mass ratio of 3:1;

[0052] The catalyst is CAT-PL-56.

[0053] The preparation process of the polydimethylsiloxane...

Embodiment 3

[0058] A polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material, comprising the following components:

[0059] Silicone oil 14.97g

[0060] Spherical boron nitride 15g

[0061] Gallium Indium Alloy 15g

[0062] Catalyst 0.03g;

[0063] Wherein, the silicone oil is composed of vinyl silicone oil, hydrogen-containing silicone oil and inhibitor in a mass ratio of 2500:500:1, and the vinyl silicone oil is selected from RH-100 of Zhejiang Runhe Organic Silicon New Material Co., Ltd.; The hydrogen-containing silicone oil is selected from RH-35 and RH-H6 of Zhejiang Runhe Silicone New Material Co., Ltd., wherein the mass ratio of RH-35 and RH-H6 is 4:5; the inhibitor is 2-phenyl-3 -butyn-2-ol;

[0064] The average particle size of the spherical boron nitride is 90 μm;

[0065] The gallium-indium alloy is a Ga:In mass ratio of 3:1;

[0066] The catalyst is CAT-PL-56.

[0067] The preparation process of the polydimethylsiloxane...

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Abstract

The invention discloses a polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material as well as a preparation method and application thereof. The composite material comprises the following components in parts by weight: 600 parts of silicone oil, 400-600 parts of spherical boron nitride, 40-600 parts of gallium-indium alloy and 1-2 parts of a catalyst. The preparation method comprises the following steps: placing the silicone oil and the gallium-indium alloy in a container, performing vacuumizing, and stirring to obtain a dispersion liquid of the gallium-indium alloy and the silicone oil; placing spherical boron nitride into the dispersion liquid, performing mixing, and stirring in vacuum to obtain uniform flowable paste A; dropwise adding a catalyst into the flowable paste A, mixing, and stirring in vacuum to obtain uniform flowable paste B; and calendering the flowable paste B, and curing to obtain the composite material. The polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material disclosed by the invention shows high heat conductivity and good mechanical properties, and an SEM (Scanning Electron Microscope) can clearly observe that the liquid metal plays a bridging role, so that the polydimethylsiloxane-based liquid metal bridged spherical boron nitride heat-conducting composite material can exert excellent properties in a TIM material.

Description

technical field [0001] The invention belongs to the technical field of thermal interface materials, and relates to a polydimethylsiloxane-based liquid metal bridging spherical boron nitride heat-conducting composite material and a preparation method and application thereof. Background technique [0002] As the size of electronic devices and systems shrinks rapidly, heat dissipation has become a critical issue affecting the performance and reliability of these devices. Due to the limitations of the manufacturing process, even a very smooth surface contact between the CPU and the radiator will inevitably have a certain gap. The thermal conductivity of the air is only 0.024W / (m K), and the existence of these gaps will seriously affect heat dissipation. Therefore, filling these gaps, ensuring good contact, increasing the contact area, and improving heat transfer efficiency have become the key to solving the problem. However, the thermal conductivity of conventional thermal int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K7/18C08K3/08
CPCC08L83/04C08K2201/005C08L2205/025C08K7/18C08K3/08
Inventor 任琳琳李俊鸿马强强曾小亮孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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