Flexible heat conduction shielding material and preparation method thereof

A technology of shielding materials and magnetic materials, which is applied in the field of flexible heat-conducting shielding materials and its preparation, to achieve the effects of improving heat conduction efficiency, enhancing fusion effect, and excellent structure and performance

Inactive Publication Date: 2020-09-04
江西伟普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In most application scenarios, materials with a single function are often difficult to meet. Therefore, exploring an efficient heat-conducting electromagnetic shielding material has become an urgent problem to be solved.

Method used

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  • Flexible heat conduction shielding material and preparation method thereof
  • Flexible heat conduction shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A flexible heat-conducting shielding material, comprising the following components by weight: magnetic material: 35 parts of Cu / Ni nano-alloy, 35 parts of polyurethane, heat-conducting filler: 18 parts of aluminum nitride, 3 parts of titanium diboride, dispersant Syltherm 800 3 parts, 2 parts of coupling agent γ-aminopropyltriethoxysilane, 1 part of melting agent stearic acid.

[0031] A flexible heat-conducting shielding material, and a preparation method comprising the following steps:

[0032] (1) Weigh the polyurethane, heat-conducting filler and magnetic material according to the formula, dry them in a vacuum oven at 80°C for 12 hours, and set aside;

[0033] (2) Add dispersant, coupling agent and fluxing agent to the dried raw materials in step (1), mix them evenly and place them in a torque rheometer at a temperature of 180°C and a speed of 90r / min, banbury for 20 minutes, and then cool down to 80°C, add magnetic material and mix well to obtain a blended sample;...

Embodiment 2

[0036] A flexible heat-conducting shielding material, comprising the following components by weight: magnetic material: 30 parts of Cu / Ni nano-alloy, 40 parts of polyurethane, heat-conducting filler: 20 parts of aluminum nitride, 2 parts of titanium diboride, dispersant Syltherm 800 4 parts, 3 parts of coupling agent γ-aminopropyltriethoxysilane, 2 parts of melting agent stearic acid.

[0037] A flexible heat-conducting shielding material, and a preparation method comprising the following steps:

[0038] (1) Weigh the polyurethane, heat-conducting filler and magnetic material according to the formula, dry them in a vacuum oven at 70°C for 12 hours, and set aside;

[0039] (2) Add dispersant, coupling agent and fluxing agent to the dried raw materials in step (1), mix them evenly and place them in a torque rheometer at a temperature of 170°C and a speed of 80r / min, banbury for 15 minutes, and then cool down to 70°C, add magnetic material and mix well to obtain a blended sample...

Embodiment 3

[0042] A flexible heat-conducting shielding material, comprising the following components by weight: magnetic material: 40 parts of Cu / Ni nano-alloy, 30 parts of polyurethane, heat-conducting filler: 18 parts of aluminum nitride, 1 part of titanium diboride, dispersant Syltherm 800 5 parts, 1 part of coupling agent γ-aminopropyltriethoxysilane, 2 parts of melting agent stearic acid.

[0043] A flexible heat-conducting shielding material, and a preparation method comprising the following steps:

[0044] (1) Weigh the polyurethane, heat-conducting filler and magnetic material according to the formula, dry them in a vacuum oven at 80°C for 12 hours, and set aside;

[0045] (2) Add dispersant, coupling agent and fluxing agent to the dried raw materials in step (1), mix them evenly and place them in a torque rheometer at a temperature of 175°C and a speed of 100r / min, banbury for 15 minutes, and then cool down to 80°C, add magnetic material and mix well to obtain a blended sample;...

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Abstract

The invention relates to a flexible heat conduction shielding material and a preparation method thereof. The flexible heat conduction shielding material comprises 30-40 parts of a magnetic material, 30-40 parts of polyurethane, 15-25 parts of a heat conduction filler and 5-10 parts of an auxiliary agent. The magnetic material is a Cu/Ni nano alloy; and the heat conduction filler is a mixture of aluminum nitride and titanium diboride. During preparation, all the components are prepared according to the proportion through a eutectic method. The flexible heat conduction shielding material has thecharacteristics of high electromagnetic shielding efficiency, high heat conductivity, strong heat dissipation performance, light weight and good flexibility.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials and composite materials, and in particular relates to a flexible heat-conducting shielding material and a preparation method thereof. Background technique [0002] At present, with the rapid development of electronic power and energy industries, the advancement of nanoelectronic technology and the emergence of new application fields, the power density of electronic and electrical equipment is increasing, and the electronic packaging structure is becoming more and more complex. The heat also increases. Excessive heat can increase the operating temperature of these devices and equipment, shorten their lifespan, and seriously affect their performance. In addition, electromagnetic radiation produced by electronic appliances and radio communications has become another major public hazard after noise pollution, air pollution, water pollution, and solid waste pollution. Electromagnetic waves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L83/04C08K13/02C08K3/28C08K3/38C08K3/08C08K5/544
CPCC08L75/04C08K2201/005C08K2201/011C08K2201/01C08K2003/282C08K2003/0862C08K2003/085C08L83/04C08K13/02C08K3/28C08K3/38C08K3/08C08K5/544
Inventor 邵萌段晓峰
Owner 江西伟普科技有限公司
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