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Anisotropic electric conduction material preparation method

A conductive material, anisotropic technology, applied in the field of anisotropic conductive material preparation, can solve problems such as complex process

Inactive Publication Date: 2013-03-06
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is complex and can only be achieved with conductive fibers

Method used

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  • Anisotropic electric conduction material preparation method

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Experimental program
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Effect test

preparation example Construction

[0027] The present invention relates to a kind of preparation method of anisotropic conductive material, and this method comprises the following steps:

[0028] Step 1) preparation of particle composite system

[0029] Add 5 to 200 parts of ferromagnetic conductive fillers with an average size of 0.1 to 100 μm in 100 parts of thermosetting or thermoplastic organic monomers, stir and disperse at 20 to 250 °C for 0.5 to 10 hours; After the system is evenly dispersed, add 1 to 15 parts of curing agent or crosslinking agent and continue stirring for 30 seconds.

[0030] Step 2) Orientation of Magnetic Particles in Magnetic Field

[0031] The dispersion composite system is injected into the mould, and then a magnetic field is applied at the mould, the magnetic field strength is 0.01-2.0T, and the orientation time is 1-60min.

[0032] Step 3) Curing

[0033] Place the oriented and formed sample in an oven for curing, the temperature of the oven is 20-200°C, and the temperature is...

Embodiment 1

[0038] Add 10 parts of carbon black / Fe with an average particle size of 0.1 μm to 100 parts of unsaturated polyester monomer 2 o 3 For ferromagnetic conductive filler, stir and disperse in a water bath at 20°C for 5 hours; after the system is uniformly dispersed, add 5 parts of cross-linking agent styrene, and continue stirring for 30 seconds.

[0039] The dispersion composite system is injected into the mold, and then a magnetic field is applied at the mold, the magnetic field is generated by an electromagnetic coil, the magnetic field strength is 0.1T, and the orientation time is 5min.

[0040] Put the oriented sample into an oven for curing, the temperature of the oven is 20°C, and the temperature is kept for 480h.

[0041] The prepared sample has dense structure, low porosity and smooth surface. Metallographic observation is carried out to the prepared sample of example 1, find the carbon black / Fe in the polymer matrix 2 o 3The ferromagnetic conductive fillers are dist...

Embodiment 2

[0043] Add 5 parts of carbon fiber / Fe ferromagnetic conductive filler with an average diameter of 0.1μm to 100 parts of epoxy resin monomer, stir and disperse in a water bath at 60°C for 0.5h; after the system is uniformly dispersed, add 15 parts of curing agent Polyamide, continue stirring for 30s.

[0044] The dispersion composite system is injected into the mold, and then a magnetic field is applied at the mold. The magnetic field is generated by an electromagnet, the magnetic field strength is 0.8T, and the orientation time is 10 minutes.

[0045] Put the oriented sample into an oven for curing, the temperature of the oven is 80°C, and keep it warm for 20h.

[0046] The prepared sample has dense structure, low porosity and smooth surface. The metallographic observation of the sample prepared in Example 2 shows that the carbon fiber / Fe ferromagnetic conductive filler in the polymer matrix is ​​distributed in chain-like clusters along the direction of the external magnetic ...

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Abstract

The present invention relates to an anisotropic electric conduction material preparation method, which comprises that: a certain amount of a ferromagnetism electric conduction filler is added to an organic polymer monomer, uniform and mechanical stirring is performed under an appropriate temperature condition, if the organic material is a thermosetting polymer, an appropriate amount of a curing agent or a cross-linking agent is added after the system is uniformly dispersed, uniform stirring is continuously performed, the diffused composite system is injected into a mold, a magnetic field is applied on the mold position, orientation is performed for a certain time, and the orientation molding sample is placed in an oven to carry out thermal insulation curing for a certain time until the sample is completely cured. The anisotropic electric conduction material preparation method has characteristics of simple process and practicality, wherein the ferromagnetism electric conduction filler presents chain distribution under the external magnetic field effect, and conductivity of the material in a direction parallel to the chain direction is much higher than conductivity of the material in a direction perpendicular to the chain direction.

Description

technical field [0001] The invention relates to a method for preparing an anisotropic conductive material, belonging to the field of material preparation. Background technique [0002] Conductive composite materials currently mainly refer to composite conductive polymer materials, which are composed of polymers and various conductive substances in a certain way. For a long time, polymer materials are usually used as insulating materials in the electrical industry, installation engineering, and communication engineering. and so on are widely used. [0003] According to different structures and preparation methods, conductive polymer materials can be divided into two categories: structural type and composite type. Structural conductive polymer, also known as intrinsic conductive polymer, refers to a material with a conjugated structure that is conductive after a small amount of doping; composite conductive polymer material is based on a polymer material, which is physically o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L63/00C08L61/06C08L23/06C08L23/12C08L25/06C08K3/04C08K7/06C08K3/08C08K3/22H01B1/22H01B1/24
Inventor 彭晓领金顶峰洪波金红晓王新庆徐靖才葛洪良
Owner CHINA JILIANG UNIV
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