Intelligent conductive composite material and preparation method thereof

A conductive composite material and composite material technology, applied in the field of electromagnetic shielding, can solve the problems of single structure of magnetic field/electric field induced composite material, inability to use electromagnetic shielding sealing materials, and no use of elastomer materials, etc., to achieve good anti-settling performance and weight Lightweight, guarantees the effect of equipment cleaning

Inactive Publication Date: 2015-04-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Based on the above, the problems existing in the current patents of conductive composite materials include: (1) the use of spherical conductive / magnetic particles to fill, the filling amount is large, the orientation is not obvious, and settlement is prone to occur during the preparation process; (2) the electromagnetic field is used to induce The base material of the self-adaptive material is resin, polyester or other thermosetting / plastic polymers, and no elastomer material is used, so it cannot be used as an electromagnetic shielding sealing material; (3) The structure of the magnetic field / electric field induced composite material is single, and When used, they are all solid structures, so that the conductive particles cannot change their orientation with the direction of electromagnetic waves, even if they have no intelligent characteristics when used.

Method used

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Examples

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Effect test

Embodiment 1

[0051] Weigh the raw materials according to the above formula, and prepare them in the following order: (1) Add 500 g of vinyl silicone rubber and 0.26 g of acetylene cyclohexanol inhibitor into a double planetary mixer, stir for 20 minutes, and then add methyl hydrogen polysiloxane in sequence Alkane crosslinking agent 25g, Karlster platinum catalyst 2.1g, respectively stirred for 15 minutes to prepare base rubber; (2) add nickel-coated graphite powder 750g, stir for 10 minutes; (3) place conductive silicone rubber in the middle of 1mm protruding In the mold, use 165°C vulcanization temperature, 10min vulcanization time and 10MPa vulcanization pressure to form an outer layer 1 with a thickness of 1mm at the edge and a depression in the middle through an extrusion molding method, and take it out; (4) Repeat step (3) to prepare the outer layer 2; (5) The two concave surfaces of the outer layers 1 and 2 are opposed to form a hollow structure, which is placed in an extrusion mold,...

Embodiment 2

[0053] Weigh the raw materials according to the above formula, and prepare them in the following order: (1) Add 500 g of α, ω-terminated hydroxyl polydimethylsiloxane, 15 g of vinyl tributylketoxime silane and 0.5 g of Dibutyltin dilaurate was stirred for 15 minutes respectively to obtain base rubber; (2) 450g of nickel-coated graphite powder was added and stirred for 10 minutes; ℃ vulcanization temperature, 30min vulcanization time and 10MPa vulcanization pressure are vulcanized into an outer layer 1 with a thickness of 1 mm at the edge and a depression in the middle by extrusion molding method, and take it out; (4) repeat step (3) to make the outer layer 2; (5) put the outer layer The two concave surfaces of layers 1 and 2 face each other to form a hollow structure, which is placed in an extrusion mold, and the base rubber prepared in step (1) is added between the contact surfaces. Under 10MPa pressure, place at 60°C for 30 minutes to obtain a hollow structure outer layer co...

Embodiment 3

[0055]Weigh the raw materials according to the above formula, and prepare them in the following order: (1) Add 500 g of vinyl silicone rubber and 0.1 g of acetylene cyclohexanol inhibitor into a double planetary mixer, stir for 20 minutes, and then add methyl hydrogen polysiloxane in sequence Alkane crosslinking agent 10g, Karlster platinum catalyst 0.5g, respectively stirred for 15 minutes to prepare base rubber; (2) add nickel-coated graphite powder 125g, stir for 10 minutes; (3) place conductive silicone rubber in the middle of 1mm protruding In the mold, use 205°C vulcanization temperature, 5min vulcanization time and 10MPa vulcanization pressure to vulcanize into an outer layer 1 with a thickness of 1mm at the edge and a depression in the middle by an extrusion molding method, and take it out; (4) Repeat step (3) to prepare the outer layer 2; (5) The two concave surfaces of the outer layers 1 and 2 are opposed to form a hollow structure, which is placed in an extrusion mol...

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Abstract

The invention discloses an intelligent conductive composite material and a preparation method thereof. The intelligent conductive composite material is characterized by adopting a closed multi-layer structure, wherein the outer layer is a solid conductive composite material and the inner layer is a liquid conductive composite material. The outer layer conductive composite material consists of the following components in percentage by weight: (1) 20wt% to 60wt% of electric / magnetic conductive particles, (2) 35wt% to75wt% of liquid silicon rubber, (3) 1.0wt% to 5.0wt% of a cross-linking agent and (4) 0.1wt% to 0.2wt% of an add; the inner layer conductive composite material consists of the following components in percentage by weight: (1) 20wt% to 60wt% of electric conductive particles and (2) 40wt% to 80wt% of an organic solvent. According to the intelligent conductive composite material disclosed by the invention, the structure and organization form of the material are configured and optimized by using an more accurate method in the term of the interior of the microstructure of the material according to a method of inducing interior particles of the material; according to the attributes of the microstructure of the material, the material structure is automatically optimized and arranged, so that the material is adapted to a relevant electromagnetic environment and the performances of the material are effectively improved.

Description

technical field [0001] The invention belongs to conductive polymer composite materials, relates to an intelligent conductive composite material and a preparation method, and can be applied to the field of electromagnetic shielding. Background technique [0002] The invention is an intelligent conductive composite material proposed for the field of electromagnetic shielding. Through the structural design and preparation of the material, the conductive particles in the material are oriented under the induction of an external electromagnetic field, thereby significantly improving the directional conductivity of the composite material, thereby improving its electromagnetic shielding performance. shielding effectiveness. [0003] With the rapid development of modern science and technology, electronic and electrical equipment continue to develop towards integration and miniaturization, and the resulting electromagnetic interference hazards are becoming increasingly serious. Condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08L83/06C08K13/06C08K9/10C08K3/04C08K7/06C08K5/5425C08J5/06C08J3/24H01B1/22H05K9/00
Inventor 夏志东聂京凯宋子博田紫阳郭福雷永平
Owner BEIJING UNIV OF TECH
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