Ternary-dielectric-filled polymer conductive composite and preparation method

A conductive composite material, medium filling technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of reducing material processing performance, mechanical properties, low compatibility between stainless steel fiber and matrix, fiber and matrix interface Low strength and other problems to achieve the effect of making up for adverse effects, increasing bonding strength, and improving mechanical properties

Inactive Publication Date: 2013-01-02
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are the following problems: (1) The compatibility between the stainless steel fiber and the matrix is ​​low, resulting in a low interface strength between the fiber and the matrix, thereby reducing the mechanical properties of the material; (2) The aspect ratio of the fiber will change during the processing. There are different degrees of decline, resulting in different degrees of decline in its electromagnetic shielding performance; (3) While increasing the amount of conductive filler to improve the conductivity, it reduces the processing performance and mechanical properties of the material; (4) The conductive filler in The dispersion in the matrix is ​​not high, and the filling amount needs to be further reduced to reduce the preparation and processing costs of conductive plastics

Method used

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  • Ternary-dielectric-filled polymer conductive composite and preparation method
  • Ternary-dielectric-filled polymer conductive composite and preparation method
  • Ternary-dielectric-filled polymer conductive composite and preparation method

Examples

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Embodiment 1

[0042] A preparation method of a ternary dielectric filled polymer conductive composite material, comprising the following steps:

[0043] The first step: carbon black nickel plating treatment:

[0044] Carry out electroless nickel plating treatment to carbon black surface, carry out surface oxidation, sensitization and activation treatment to carbon black before carbon black nickel plating treatment, it comprises the following steps:

[0045] A. Degreasing: Degrease the carbon black in the alkali solution of sodium hydroxide: 60g / L, sodium carbonate: 10g / L, sodium phosphate: 25g / L, 6501 cleaning agent: 5g / L, temperature: 40-50 ℃, time: 40min, then wash with distilled water at room temperature to remove impurities; B, coarsening: Soak the carbon black after degreasing treatment in ammonium peroxodisulfate: 200g / L; sulfuric acid: 100ml / L roughening solution 10min, the temperature is 60~70℃, then neutralize in 60 g / L sodium hydroxide solution at room temperature, and finally wa...

Embodiment 2

[0058] A preparation method of a ternary dielectric filled polymer conductive composite material, comprising the following steps:

[0059] The first step: carbon black nickel plating treatment:

[0060] Carry out electroless nickel plating treatment to carbon black surface, carry out surface oxidation, sensitization and activation treatment to carbon black before carbon black nickel plating treatment, it comprises the following steps:

[0061] A. Degreasing: Degrease the carbon black in the alkali solution of sodium hydroxide: 50g / L, sodium carbonate: 15g / L, sodium phosphate: 20g / L, 6501 cleaning agent: 3g / L, temperature: 40-50 ℃, time: 30min, then wash with distilled water at room temperature to remove impurities;

[0062] B. Coarsening: Soak the carbon black after degreasing treatment in ammonium peroxodisulfate: 180g / L; sulfuric acid: 80ml / L roughening solution for 15min at a temperature of 60~70°C, and then oxidize it in 100 g / L hydrogen Neutralize with sodium solution, ...

Embodiment 3

[0075] A preparation method of a ternary dielectric filled polymer conductive composite material, comprising the following steps:

[0076] The first step: carbon black nickel plating treatment:

[0077] Carry out electroless nickel plating treatment to carbon black surface, carry out surface oxidation, sensitization and activation treatment to carbon black before carbon black nickel plating treatment, it comprises the following steps:

[0078] A. Degreasing: Degrease the carbon black in the alkaline solution of sodium hydroxide: 55g / L, sodium carbonate: 15g / L, sodium phosphate: 20g / L, 6501 cleaning agent: 4g / L, temperature: 40-50 ℃, time: 50min, then wash with distilled water at room temperature to remove impurities;

[0079] B. Coarsening: Soak the carbon black after degreasing treatment in ammonium peroxodisulfate: 190g / L; sulfuric acid: 90ml / L roughening solution for 20min at a temperature of 60~70°C, and then oxidize it in 50 g / L hydrogen Sodium solution for neutralizati...

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Abstract

A ternary-dielectric-filled polymer conductive composite comprises, by weight, (3-8)% of stainless steel fibers, (2-6)% of carbon black, (1-5)% of polyaniline, (65-70)% of polypropylene, (10-22)% of polyethylene or polyolefin plastics and (2-6)% of additives for improving polypropylene forming process performance. The composite is an aggregate of a sheath-core structure, the stainless steel fibers with polyaniline films by means of surface electrochemical deposition serve as the core, the coating sheath layer is a composite obtained by milling modified carbon black pellets of three-layer structures, polypropylene and the like, and each modified carbon black pellet of the three-layer structure includes a carbon black core layer, a secondary nickel plating surface layer and an outer polyaniline film surface layer. The ternary-dielectric-filled polymer conductive composite is high in electric conductivity and mechanical property, and in order to obtain the same conductivity, the composite is lower in required conductive dielectric addition amount, high in mechanical property and lower in material cost.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a ternary medium-filled polymer conductive composite material and a preparation method thereof. Background technique [0002] Different from the fixed resistivity of metal conductors, conductive polymer composites can obtain different resistivity and resistance characteristics by adjusting the type, shape, quantity and type of matrix of the filler phase, etc. With the advantages of processing and forming, it has become one of the fastest-growing conductive materials in recent years. It is a key material for the development of electronics, information, electromagnetic shielding and other fields, and its applications continue to expand. [0003] Conductive polymer composite material is a multi-phase composite material system with conductive function obtained by filling conductive media, dispersion compounding, lamination compounding and other methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/00C08L79/02H01B1/22C08K13/04C08K7/04C08K3/04C08K5/098C08K3/34
Inventor 吴海宏蔡刚毅郭正民郭永刚畅同晨孙兴志
Owner HENAN UNIVERSITY OF TECHNOLOGY
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