Silica gel composite material with high heat conductivity coefficient and excellent electromagnetic shielding performance

A composite material, electromagnetic shielding technology, applied in the direction of climate sustainability, sustainable manufacturing/processing, chemical industry, etc., can solve the problems of insufficient performance, high thermal conductivity cannot have electromagnetic shielding performance, etc., and achieve good electromagnetic shielding performance , The effect of good out-of-plane thermal conductivity

Active Publication Date: 2020-04-17
东莞市奥博特导热科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing silica gel composite materials cannot have excellent electromagnetic shielding performance while having high thermal conductivity, and their performance cannot meet actual needs

Method used

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  • Silica gel composite material with high heat conductivity coefficient and excellent electromagnetic shielding performance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A silica gel composite material with high thermal conductivity and excellent electromagnetic shielding performance, the composition of the silica gel composite material is as follows:

[0027] MXene material 1-3g;

[0028] h-BN material 3-5g;

[0029] Single-layer graphene powder 0.5-1.5g;

[0030] Urea 20-50g;

[0031] Silica gel 10-45g;

[0032] Wherein the MXene material has the functions of electromagnetic shielding, heat conduction, and charge conduction; the h-BN material has the functions of insulation, coating, isolation of MXene, graphene nanosheets and heat conduction; the graphene has the functions of electromagnetic shielding , the function of heat conduction; the urea is an intercalation stripping reagent, which also has the function of modifying the surface of the two-dimensional material;

[0033] The MXene material, h-BN material, and graphene are used as fillers. After the fillers are stripped by urea molecules under the condition of plasma ball mil...

Embodiment 2

[0037] A silica gel composite material with high thermal conductivity and excellent electromagnetic shielding performance, the filler concentration is controlled at a ratio of 20wt%, and the specific components of the silica gel composite material are as follows: MXene material 1g; h-BN material 3g; graphene 1g; urea 25g ; Silica gel 20g.

[0038] The MXene material, the h-BN material, and the graphene were stripped with urea and mixed by ball milling to prepare fillers, which were then dispersed in silica gel, and samples were taken for testing B.

Embodiment 3

[0040] A silica gel composite material with high thermal conductivity and excellent electromagnetic shielding performance, the filler concentration is controlled at a ratio of 30wt%, and the specific components of the silica gel composite material are as follows: MXene material 1g; h-BN material 3g; graphene 1g; urea 25g ;Silicone 12g.

[0041] The MXene material, the h-BN material, and the graphene were all stripped with urea and mixed by ball milling to prepare fillers, which were then dispersed in silica gel, and samples were taken for testing C.

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PUM

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Abstract

The invention discloses a silica gel composite material with high heat conductivity coefficient and excellent electromagnetic shielding performance. The silica gel composite material comprises the following components: 1 to 3 g of an MXene material, 3 to 5 g of an h-BN material, 0.5 to 1.5 g of single-layer graphene powder, 20 to 50 g of urea, and 10 to 45 g of silica gel, wherein the MXene material has the effects of electromagnetic shielding, heat conduction and charge conduction; the h-BN material has the effects of insulation, isolation of MXene and graphene nanosheets and heat conduction;the graphene has the effects of electromagnetic shielding and heat conduction; the urea is a ball milling agent and has the effect of modifying the surface of a two-dimensional material. By taking the MXene material, the h-BN material and the single-layer graphene powder as fillers, urea molecules are stripped and mixed under the condition of plasma ball milling to prepare a composite filler, andthe composite filler is dispersed in silica gel to obtain the silica gel-based composite material.

Description

technical field [0001] The invention relates to the technical field of composite materials, and more specifically relates to a silica gel composite material with high thermal conductivity and excellent electromagnetic shielding performance. Background technique [0002] Thermal conductivity, that is, thermal conductivity refers to the ability of a material to conduct heat directly, or thermal conductivity. Thermal conductivity is defined as the heat directly conducted by a material with unit cross-section and length under unit temperature difference and unit time. The unit of thermal conductivity is watt-meter -1 Kelvin -1 . Thermal conductivity, where is the cross-sectional area of ​​the heat conductor, is the heat conduction per unit time, is the thickness of the heat conductor between the two heat sources, and is the temperature difference. [0003] Shielding is one of the important measures to improve the electromagnetic compatibility of electronic systems and electr...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K3/38C08K3/04C08K5/21C08K3/00C08K9/04
CPCC08K3/38C08K3/042C08K5/21C08K3/00C08K9/04C08K2201/011C08K2003/385C08L83/04Y02P20/10
Inventor 李鸿韬郭成
Owner 东莞市奥博特导热科技有限公司
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