Composite material which has high thermal conductivity and electromagnetic shielding function and preparation method thereof

A composite material and electromagnetic shielding technology, applied in the direction of heat exchange materials, magnetic field/electric field shielding, chemical instruments and methods, etc., can solve problems such as inability to achieve heat conduction effect, affect product performance and service life, and large resistivity. Easy to repair, good mechanical strength, easy to use

Pending Publication Date: 2018-09-04
SHENZHEN BORNSUN INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optical components made of existing silicon-free materials have high resistivity and a thermal conductivity of 0.2 W/m·degree. For electron

Method used

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  • Composite material which has high thermal conductivity and electromagnetic shielding function and preparation method thereof
  • Composite material which has high thermal conductivity and electromagnetic shielding function and preparation method thereof
  • Composite material which has high thermal conductivity and electromagnetic shielding function and preparation method thereof

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Experimental program
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preparation example Construction

[0028] The preparation method of the composite material is as follows: firstly, the components of the lower layer material composition are vacuum mixed by a power mixer, and then the mixture is coated with the lower layer material composition vulcanized into an elastic sheet by using a coating device; then the upper layer material is The components of the composition are mixed by a high-speed mixer to obtain the upper layer material composition, and then the lower layer material composition of the sheet is placed on the spraying equipment, and the upper layer material composition is sprayed evenly on the lower layer material composition, and then vulcanized, that is A composite material with high thermal conductivity and electromagnetic shielding function is obtained.

[0029] The prepared composite materials were tested for thermal conductivity, resistivity and flame retardancy. Among them, the thermal conductivity test used Hotdisk testing equipment; the dielectric constant t...

Embodiment 1

[0032] Lower material preparation: 24 grams of polyacrylate rubber with a viscosity of 8000 centistokes, 10 grams of boron nitride (Saint-Gobain, USA) with a particle size of 20 microns, 35 grams of graphitized carbon fiber powder with a particle size of 100 microns (Japan Carbon element), 7 grams of graphene (self-made), 25 grams of phosphorus nitrogen flame retardant (Dongguan Daoer New Materials), 0.5 grams of dibenzoyl peroxide and 0.5 grams of anti-aging agent D (N-phenyl-β-naphthalene Amine) placed in a stirrer with a rotation speed of 30 rpm and a vacuum degree of -0.08 or less and stirred for 30 minutes to make the components evenly mixed. Pour the stirred mixture into the feeding platform of the coating equipment, adjust the thickness to 1.0 mm, and place it in an oven at 150° C. for 10 minutes for vulcanization to obtain an elastic sheet-shaped lower layer material composition 20 .

[0033] Preparation of the upper material: 17.6 grams of polyacrylate rubber with a v...

Embodiment 2

[0037] Lower material preparation: 23 grams of polyacrylate rubber with a viscosity of 5000 centistokes, 17 grams of boron nitride (Saint-Gobain, USA) with a particle size of 10 microns, 33.4 grams of graphitized carbon fiber powder with a particle size of 100 microns (Japan Carbon element), 3 grams of graphene (self-made), 23 grams of phosphorus nitrogen flame retardant (Dongguan Daoer New Materials), 0.5 grams of dibenzoyl peroxide and 0.1 grams of anti-aging agent D (N-phenyl-β-naphthalene Amine) placed in a stirrer with a rotation speed of 30 rpm and a vacuum degree of -0.08 or less and stirred for 30 minutes to make the components evenly mixed. Pour the stirred mixture into the feeding platform of the coating equipment, adjust the thickness to 2.0 mm, place it in an oven at 150° C. for 10 minutes for vulcanization, and obtain an elastic sheet-shaped lower layer material composition 20 .

[0038]Preparation of upper material: 21.6 grams of polyacrylate rubber with a viscos...

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Abstract

The invention provides a composite material which has high thermal conductivity and an electromagnetic shielding function. The composite material is formed by compounding an upper layer material composition and a lower layer material composition through vulcanization, wherein the thickness of the upper layer material composition is 0.02-0.7 millimeters, the thickness of the lower layer material composition is 0.5-6.0 millimeters, the thermal conductivity coefficient of the composite material is 3.0-8.0 watt/meter*degree, and the resistivity of the composite material is smaller than or equal to0.01 ohm*centimeter. The invention further discloses a preparation method of the composite material which has high thermal conductivity and the electromagnetic shielding function. According to the composite material, not only can thermal conductivity and electromagnetic shielding be guaranteed, but also the compositions are made to have high mechanical strength, the thermal conductivity coefficient of the obtained composite material is higher than that, which is 0.2 watt/meter*degree, of normal materials, and the resistivity of the obtained composite material is smaller than or equal to 0.01ohm*centimeter so that application in a laser television can be fully achieved; moreover, by means of the composite material, the requirements of a thermal conductivity, shielding and elastic thermalconductivity interface material in conditions sensitive to organosilicone can be met, so that the requirements of heat dissipation and signal stabilization of a product are met.

Description

【Technical field】 [0001] The invention relates to a composite material, in particular to a composite material with good heat conduction effect and electromagnetic shielding and high heat conduction and electromagnetic shielding functions. 【Background technique】 [0002] With the rapid development of information technology, the requirements for the materials of optical components in electronic products are also getting higher and higher. For example, in the case of optical components such as hard disk heads and laser TVs, the components are highly sensitive to the volatile content of organic silicon in the material, which will cause lens fogging or reduce the sensitivity of the magnetic head, resulting in product quality problems. Therefore, in this case, a substrate that does not contain any silicone components must be selected as a carrier. However, the optical components made of existing silicon-free materials have high resistivity and a thermal conductivity of 0.2 W / m·de...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08L33/04C08L15/00C08K13/04C08K7/06C08K3/38C08K3/04C08K5/14C08K5/18C09D133/04C09D7/61C09D7/62C09D7/63H05K9/00C09K5/14
CPCC08J2315/00C08J2333/04C08J2415/00C08J2433/04C08K5/14C08K5/18C08K7/06C08K9/10C08K13/04C08K2003/0806C08K2003/0812C08K2003/085C08K2003/385C09D133/04C09K5/14C08K3/042C09D7/61C09D7/62C09D7/63C08J7/0427H05K9/0081
Inventor 唐正阳许丰光刘治林
Owner SHENZHEN BORNSUN INDAL
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