Light, conducting and shielding composite material and preparation method thereof

A composite material and conductive shielding technology, which is applied in the field of lightweight conductive shielding composite materials and its preparation, can solve problems affecting the electromagnetic shielding performance of products, easily pollute the environment, and deteriorate the mechanical properties of products, so as to achieve reliable electromagnetic shielding performance , spectrum range expansion, and the effect of increasing mechanical properties

Active Publication Date: 2015-11-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter the product or its manufacturing method, there are deficiencies. First, the carbon nanotubes in the polymer foam are easy to agglomerate, so it is extremely difficult to distribute evenly in the foam, thereby affecting the conductivity of the product. It especially affects the electromagnetic shielding performance of the product; secondly, the product formed due to foaming not only easily makes the carbon nanotubes in it further agglomerate during foaming, but also makes the mechanical properties of the product worse, which affects its application. Thirdly, the manufacturing method can neither obtain products with reliable electromagnetic shielding performance and good mechanical properties, but also requires surfactants, catalysts, foaming agents, curing agents and other raw materials, which are easy to pollute the environment

Method used

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  • Light, conducting and shielding composite material and preparation method thereof
  • Light, conducting and shielding composite material and preparation method thereof
  • Light, conducting and shielding composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The concrete steps of preparation are:

[0039] Step 1, first mix the fluoroplastic, etching phase, carbon nanotubes and hollow glass microspheres at a weight ratio of 20:60:0.5:40 at 15°C to obtain a mixture; wherein the fluoroplastic is polybiased Vinyl fluoride, the etching phase is polyvinyl chloride, and the carbon nanotubes are multi-walled carbon nanotubes. Then, the mixture was placed in a torque rheometer, and kneaded at 150° C. and 100 r / min for 20 min to obtain a kneaded material.

[0040] Step 2, first place the mixed material on a flat vulcanizing machine, and heat press at 200°C and 10 MPa for 60 minutes to obtain a composite plate. The composite board was soaked in a solvent for 2 hours, and then dried at 60° C. for 15 hours; wherein, the solvent was xylene, and ethanol was used to rinse the surface deposits before drying the solvent-soaked composite board. made approximately figure 1 and figure 2 shown, and as image 3 Lightweight conductive shield...

Embodiment 2

[0042] The concrete steps of preparation are:

[0043] Step 1, first mix the fluoroplastic, etching phase, carbon nanotubes and hollow glass microspheres at a weight ratio of 30:50:5:30 at 19°C to obtain a mixture; wherein the fluoroplastic is polybiased Vinyl fluoride, the etching phase is polyvinyl chloride, and the carbon nanotubes are multi-walled carbon nanotubes. The mixture was then placed in a torque rheometer, and kneaded at 175° C. and 83 r / min for 17 min to obtain a kneaded material.

[0044]Step 2, first place the mixed material on a flat vulcanizer, and heat press at 220°C and 8 MPa for 48 minutes to obtain a composite plate. The composite board was soaked in a solvent for 6 hours, and then dried at 65°C for 18 hours; wherein, the solvent was xylene, and ethanol was used to rinse the surface deposits before drying the solvent-soaked composite board. made approximately figure 1 and figure 2 shown, and as image 3 Lightweight conductive shielding composites sh...

Embodiment 3

[0046] The concrete steps of preparation are:

[0047] Step 1, first mix the fluoroplastic, etching phase, carbon nanotubes and hollow glass microspheres according to the weight ratio of 40:40:10:20 at 23°C to obtain a mixture; wherein the fluoroplastic is poly Vinyl fluoride, the etching phase is polyvinyl chloride, and the carbon nanotubes are multi-walled carbon nanotubes. The mixture was then placed in a torque rheometer, and kneaded at 200° C. and 75 r / min for 13 min to obtain a kneaded material.

[0048] Step 2, first place the mixed material on a flat vulcanizer, and heat press at 240°C and 5 MPa for 35 minutes to obtain a composite plate. The composite board was soaked in a solvent for 11 hours, and then dried at 70° C. for 10 hours; wherein, the solvent was xylene, and ethanol was used to rinse the surface deposits before drying the solvent-soaked composite board. made as figure 1 and figure 2 shown, and as image 3 Lightweight conductive shielding composites sh...

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Abstract

The invention discloses a light, conducting and shielding composite material and a preparation method thereof. The light, conducting and shielding composite material is composed of fluoroplastic, carbon nano tubes and hollow glass beads in a weight ratio of (20-60):(0.5-20):(0.5-40), wherein the fluoroplastic is foamed, and the carbon nano tubes are arranged in the fluoroplastic and are of a network structure. The preparation method of the light, conducting and shielding composite material comprises the following steps: firstly uniformly mixing the fluoroplastic, an etching phase, the carbon nano tubes and the hollow glass beads, so as to obtain a mixture; then mixing the mixture in a torque rheometer, so as to obtain a mixed material; and then carrying out hot pressing on the mixed material on a plate vulcanization machine, so as to obtain a composite board, then soaking the composite board in a solvent for removing the etching phase, and drying, so as to obtain the target product, namely the light, conducting and shielding composite material. The light, conducting and shielding composite material has the advantages of light weight, reliable electromagnetic shielding performance, good mechanical properties, simple technology, no pollution, low cost and applicability in large-scale industrial production, and can be easily and widely applied to electronic equipment and intensive systems in the fields of spaceflight, aviation, automobiles and the like.

Description

technical field [0001] The invention relates to a conductive shielding composite material and a preparation method thereof, in particular to a lightweight conductive shielding composite material and a preparation method thereof. Background technique [0002] Electromagnetic shielding materials are widely used in some electronic devices and dense systems. Traditional electromagnetic shielding materials are generally made of metal. Although their shielding effect is good, they also have the defects of heavy weight, easy corrosion, and poor processing performance; it is difficult to apply them in aerospace, aviation, automobile and other fields. Recently, people have made some beneficial attempts and efforts in order to obtain lightweight electromagnetic shielding materials, such as a conductive polymer foam and elastomer disclosed on August 17, 2005 in the Chinese invention patent application publication CN1656574A and its manufacture method. The conductive polymer foam desc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L27/06C08K7/24C08K7/28B29C35/02
Inventor 王慧郑康张献包超丁欣郭乐田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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