Heat-conducting and wave-absorbing material and preparation method thereof

A wave-absorbing material and raw material technology, applied in the field of heat-conducting wave-absorbing materials and their preparation, can solve problems such as threats to the normal operation of electronic components, poor thermal conductivity, and secondary pollution by electromagnetic waves

Active Publication Date: 2018-07-13
ZHEJIANG SAINTYEAR ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to better control various electromagnetic wave pollution has become a more complicated problem.
[0004] At present, in the protection of electromagnetic wave pollution, most of the electromagnetic wave reflective materials are used. This method can reflect the electromagnetic wave irradiated on a certain object. Although the protective effect on a certain object is solved, the reflected electromagnetic wave will inevitably cause pollution. Secondary pollution
Moreover, the previous electromagnetic shielding materials usually have poor thermal conductivity, and with the development of integration technology, microelectronic packaging technology and high-power LED technology, the heat generated by electronic components and electronic equipment accumulates and increases rapidly, which will damage the electronic components. Normal work poses a greater threat, and also poses a test to the mechanical properties of the shielding material itself

Method used

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  • Heat-conducting and wave-absorbing material and preparation method thereof
  • Heat-conducting and wave-absorbing material and preparation method thereof
  • Heat-conducting and wave-absorbing material and preparation method thereof

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preparation example Construction

[0100] The present invention also provides a method for preparing a heat-conducting wave-absorbing material, comprising the following steps:

[0101] a) dissolving the silane coupling agent in a solvent to obtain a hydrolyzate;

[0102] b) mixing the hydrolyzate with sendust magnetic powder, drying and solidifying to obtain a modified sendust;

[0103] c) the modified sendust, vinyl silicone, silicon hydrogen silicone and SiO 2 Powder mixed to obtain premixed rubber;

[0104] d) mixing the premixed rubber material with the platinum catalyst and hydrogen-containing silicone oil to obtain the rubber material;

[0105] e) vulcanizing the rubber material to obtain a heat-conducting and wave-absorbing material.

[0106] Among them, the vinyl silicone, silicon hydrogen-based silicone, hydrogen-containing silicone oil, sendust magnetic powder, SiO 2 The type and amount of powder, silane coupling agent, platinum catalyst, and solvent are consistent with those described in the abov...

Embodiment 1

[0119] 1.1 Preparation of materials:

[0120] Dissolve 3.0 parts by mass of hexadecyltrimethoxysilane in 200 parts by mass of solvent (a mixture of 95% ethanol and 5% water by volume), add acetic acid to adjust the pH to 4.5-5.5, and dissolve for 8 minutes. Obtain a hydrolyzate; take 9.0 parts by mass of the hydrolyzate and use the spray method to mix and modify with soft magnetic powder (D50 is 30 μm, sendust magnetic powder with an aspect ratio of 100:1), and then dry and solidify to obtain a modified sendust alloy. Mix 185 parts of modified sendust, 100 parts of low-viscosity vinyl polysiloxane (see formula 5, wherein w is the value that makes formula 5 have a viscosity of 450mPa.S), 115 parts of low-viscosity silicon hydrogen polysiloxane Alkanes (see formula 6, wherein, w1 is the value that makes formula 6 have 550mPa.S viscosity), 105 parts of SiO 2 Stir and mix the powder at room temperature 20-25°C for 10-30 minutes to obtain pre-mixed rubber. Add 150 parts of high-...

Embodiment 2

[0125] 1.1 Preparation of materials:

[0126] Dissolve 3.0 parts by mass of hexadecyltrimethoxysilane in 200 parts by mass of solvent (a mixture of 95% ethanol and 5% water by volume), add acetic acid to adjust the pH to 4.5-5.5, and dissolve for 8 minutes. Obtain a hydrolyzate; take 9.0 parts by mass of the hydrolyzate and use the spray method to mix and modify with soft magnetic powder (D50 is 60 μm, sendust magnetic powder with an aspect ratio of 100:1), and then dry and solidify to obtain a modified sendust alloy. Mix 185 parts of modified sendust, 100 parts of low-viscosity vinyl polysiloxane (see formula 5, wherein w is the value that makes formula 5 have a viscosity of 450mPa.S), 115 parts of low-viscosity silicon hydrogen polysiloxane Alkanes (see formula 6, wherein, w1 is the value that makes formula 6 have 550mPa.S viscosity), 105 parts of SiO 2 Stir and mix the powder at room temperature 20-25°C for 10-30 minutes to obtain pre-mixed rubber. Add 150 parts of high-...

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Abstract

The invention provides a heat-conducting and wave-absorbing material and a preparation method thereof, wherein the heat-conducting and wave-absorbing material is prepared from the following raw materials by weight: 200-400 parts of vinyl organosilicon, 150-550 parts of Si-H organosilicon, 0.1-5 parts of hydrogen-containing silicone oil, 50-400 parts of iron-silicon aluminum alloy magnetic powder,20-300 parts of SiO2 powder, 0.1-10 parts of a silane coupling agent, 0.005-0.5 part of a platinum catalyst, and 20-500 parts of a solvent. According to the present invention, the specific componentsare matched according to the specific ratio, such that the obtained heat-conducting and wave-absorbing material can excellent absorb K[alpha] electromagnetic waves so as to produce good electromagnetic absorption, and further has good thermal conductivity and good physical and mechanical property so as to easily achieve the normal operation of electronic equipment and improve the service life of the electromagnetic material.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding, and in particular relates to a heat-conducting wave-absorbing material and a preparation method thereof. Background technique [0002] With the development of modern science and technology, the impact of electromagnetic radiation on the environment and people is increasing. The electromagnetic waves released by electronic products will cause electromagnetic interference to other electronic devices around them, making them work abnormally; at the same time, they will also affect the human body. Health hazards, such as changing the balance of the system through interference with the human body system, including the endocrine system, cardiovascular and cerebrovascular systems, leading to various diseases. Therefore, controlling electromagnetic pollution and finding materials that can resist and weaken electromagnetic radiation have become a major issue in materials science. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/05C08L83/07C08K9/06C08K3/08C08K3/02C08K3/36C09K5/14
CPCC08K2003/023C08K2003/0812C08K2003/0856C08K2201/01C08L83/04C08L2205/025C08L2205/035C09K5/14C08K9/06C08K3/08C08K3/02C08K3/36
Inventor 温海林龚华旭陈庆渺周鸿柯维再张婷方源
Owner ZHEJIANG SAINTYEAR ELECTRONICS TECH
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