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Preparation method of electromagnetic shielding composite material and the electromagnetic shielding composite material

A composite material and electromagnetic shielding technology, which is applied in the preparation of electromagnetic shielding composite materials and the field of electromagnetic shielding composite materials, can solve the problem of needle tip fracture of four-needle zinc oxide whiskers, poor electromagnetic shielding performance of composite materials, and influence on conductive network components, etc. problem, achieve the effect of overcoming filler crushing, enhancing shielding characteristics, and promoting conductive network

Inactive Publication Date: 2020-02-14
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the use of mechanical stirring to mix glue easily causes the tip of the four-needle zinc oxide whisker to break, which affects the components of the conductive network, resulting in poor electromagnetic shielding performance of the composite material. defect, thereby providing a preparation method of electromagnetic shielding composite material and electromagnetic shielding composite material

Method used

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  • Preparation method of electromagnetic shielding composite material and the electromagnetic shielding composite material
  • Preparation method of electromagnetic shielding composite material and the electromagnetic shielding composite material

Examples

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Embodiment 1

[0035] This embodiment provides an electromagnetic shielding composite material, including the following raw materials: 100 g of silicone rubber matrix (90 g of silicone rubber 3450A and 10 g of silicone rubber 3450B), 2 g of crosslinking agent hydroxyl silicone oil, 2 g of platinum catalyst, and copper-plated four Acicular zinc oxide filler 20g, acetylenic alcohol inhibitor 2g.

[0036] The preparation method of the above-mentioned electromagnetic shielding composite material comprises the following steps:

[0037] 1) Mix silicone rubber 3450A, silicone rubber 3450B, cross-linking agent hydroxy silicone oil, platinum catalyst, and acetylenic alcohol inhibitor to prepare a rubber compound.

[0038] 2), the mixed rubber obtained in step 1) is evacuated in a vacuum box to remove air bubbles in the mixed rubber;

[0039]3), the mixed rubber obtained in step 2) is placed in a polytetrafluoroethylene mold, and the tetrapod zinc oxide coated with copper on the surface is evenly dis...

Embodiment 2

[0042] This embodiment provides an electromagnetic shielding composite material, including the following raw materials: 100 g of silicone rubber matrix (90 g of silicone rubber 3450A and 10 g of silicone rubber 3450B), 1 g of crosslinking agent hydroxyl silicone oil, 1 g of platinum catalyst, and four Acicular zinc oxide filler 30g, acetylenic alcohol inhibitor 1g.

[0043] The preparation method of the above-mentioned electromagnetic shielding composite material comprises the following steps:

[0044] 1) Mix silicone rubber 3450A, silicone rubber 3450B, cross-linking agent hydroxy silicone oil, platinum catalyst, and acetylenic alcohol inhibitor to prepare a rubber compound.

[0045] 2), the mixed rubber obtained in step 1) is evacuated in a vacuum box to remove air bubbles in the mixed rubber;

[0046] 3), the mixed rubber obtained in step 2) is placed in a polytetrafluoroethylene mould, and the four-acicular zinc oxide coated with aluminum on the surface is evenly disperse...

Embodiment 3

[0049] This embodiment provides an electromagnetic shielding composite material, including the following raw materials: 100 g of silicone rubber matrix (90 g of silicone rubber 3450A and 10 g of silicone rubber 3450B), 3 g of crosslinking agent hydroxyl silicone oil, 3 g of platinum catalyst, and four Needle-shaped zinc oxide filler 40g, acetylenic alcohol inhibitor 3g.

[0050] The preparation method of the above-mentioned electromagnetic shielding composite material comprises the following steps:

[0051] 1) Mix silicone rubber 3450A, silicone rubber 3450B, cross-linking agent hydroxy silicone oil, platinum catalyst, and acetylenic alcohol inhibitor to prepare a rubber compound.

[0052] 2), the mixed rubber obtained in step 1) is evacuated in a vacuum box to remove air bubbles in the mixed rubber;

[0053] 3), the mixed rubber obtained in step 2) is placed in a polytetrafluoroethylene mold, and the tetraacicular zinc oxide coated with tin on the surface is evenly dispersed...

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Abstract

The invention relates to the field of electromagnetic shielding materials, and particularly relates to a preparation method of an electromagnetic shielding composite material and the electromagnetic shielding composite material. The method comprises the steps that tetrapod-shaped zinc oxide plated with metal is dispersed into silicone rubber under the action of a high-voltage electric field, thenhigh-temperature vulcanization forming is conducted, wherein the high-voltage electric field is an alternating-current electric field, and the electric field intensity is 10 kV / cm to 50 kV / cm. According to the preparation method provided by the invention, the surface of tetrapod-shaped zinc oxide is plated with metal to form tetrapod-shaped zinc oxide plated with metal on the surface and having aconductive characteristic; by utilizing conductive properties of the tetrapod-shaped zinc oxide plated with metal, the tetrapod-shaped zinc oxide plated with metal can be dispersed under the functionof the electric field in a proper high-voltage electric field, a problem that a filler is broken due to conventional mechanical force is solved, the tetrapod-shaped zinc oxide can play a role of a special spatial three-dimensional structure in the silicon rubber, so that the tetrapod-shaped zinc oxide plated with metal can be promoted to form a good conductive network in the silicon rubber, and the shielding characteristic of the composite material is enhanced.

Description

technical field [0001] The invention relates to the field of electromagnetic shielding materials, in particular to a method for preparing an electromagnetic shielding composite material and the electromagnetic shielding composite material. Background technique [0002] With the large-scale application of ultra-high voltage and ultra-high voltage transmission in the power grid, the transmission voltage level of the power grid continues to increase, and the electromagnetic disturbance problem in the substation / converter station is becoming increasingly prominent. In addition, due to the acceleration of smart substation construction, the space of substations is more compact and intensive. In a limited space environment, how to achieve effective shielding and compatibility between primary equipment and secondary equipment has attracted increasing attention. Electromagnetic compatibility, especially electromagnetic interference Inhibition puts forward higher and higher requiremen...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K9/02C08K7/08
CPCC08K2201/001C08L83/04C08L2205/025C08L2205/03C08K9/02C08K7/08
Inventor 王广克侯东聂京凯张燕秉樊超田一陈新韩钰王斌刘主光
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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