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Frequency selection, electromagnetic shielding, heat insulation, light weight and impact resistance integrated three-dimensional fabric composite material and preparation method thereof

A three-dimensional fabric, electromagnetic shielding technology, applied in the direction of fabrics, multi-strand fabrics, textiles, etc., can solve the problems of inability to meet the mechanical performance requirements of industrial design composite materials, little research on electromagnetic shielding, and poor shear resistance. Integrated design of structure and function, easy to promote and use, low cost

Pending Publication Date: 2022-04-22
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is little research on electromagnetic shielding for the design of fabric structures
Two-dimensional fabric polymer composites and multi-layer fabric composites generally have poor interlayer shear resistance, which cannot meet the mechanical performance requirements of industrial design composite materials, and have been gradually replaced by three-dimensional fabrics.
The preparation process of this method is complicated, the energy consumption is high, and it is difficult to realize industrialization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Frequency selection, electromagnetic shielding, heat insulation, light weight and impact resistance integrated three-dimensional fabric composite material and preparation method thereof
  • Frequency selection, electromagnetic shielding, heat insulation, light weight and impact resistance integrated three-dimensional fabric composite material and preparation method thereof
  • Frequency selection, electromagnetic shielding, heat insulation, light weight and impact resistance integrated three-dimensional fabric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Carbon fiber three-dimensional spacer yarn fabric / polyurethane (PU) foam composite material

[0049] The carbon fiber three-dimensional spacer yarn fabric uses carbon fiber as its warp, weft and spacer yarns, and the fineness is 198tex. The upper and lower layers are alternately interlaced up and down in plain weave, and the height of the spacer yarns is controlled by using spacers (the height range is usually between 0.5mm-2mm), and the spacer yarns that participate in the weaving of the upper layer move to the lower layer to participate in the lower layer along with the palm frame. For the weaving of the lower layer, the spacer yarn that participates in the weaving of the lower layer moves to the upper layer with the palm frame to participate in the weaving of the upper layer, and then continues the weaving of the upper and lower layers; until the next part that needs to be tied, repeat the above operation, and the spacer yarn is " The 8" shape props up the upper and ...

Embodiment 2

[0054] Carbon fiber spacer yarn fabric / PMMA expanded microspheres@epoxy resin composite material

[0055] The weaving method and pretreatment of the carbon fiber spacer yarn fabric are the same as in Example 1.

[0056] Weigh 2g of PMMA heat-expandable microspheres and mix them evenly with 4g of amine curing agent. The amine curing agent is aliphatic amine with an active hydrogen equivalent of 60g / eq. Use mechanical stirring at 1000rpm to mix evenly for 5min to obtain mixed solution 1, then weigh 8g of epoxy resin and The above mixed solution was uniformly mixed, and mechanically stirred at 1000 rpm for 10 minutes to obtain mixed solution 2. Inject the mixed solution 2 into the reserved injection port, seal the mold, put it in an oven at 120°C, take it out after 1 hour, and demould after cooling at room temperature to obtain carbon fiber spacer yarn / PMMA expanded microsphere@epoxy resin composite material.

[0057] After testing, the shielding effectiveness curve of the carbo...

Embodiment 3

[0059] Carbon Fiber Spacer Yarn Fabric / Conductive Foam Composite

[0060] The weaving method and pretreatment of the carbon fiber spacer yarn fabric are the same as in Example 1.

[0061] Weigh 10g of PMMA heat-expandable microspheres, add them into 50mL of concentrated sulfuric acid, stir continuously for 60min roughening treatment, wash repeatedly, and dry for later use. Disperse GA in ethanol at a ratio of 2 mg / mL, and perform ultrasonic treatment for 30 min to obtain a GA ethanol dispersion. Put the PMMA heat-expandable microspheres after the above treatment into 30mL of 2mg / mL GA ethanol dispersion, put them into a water bath at 70°C, and keep stirring until the ethanol evaporates to dryness. During this process, GA will be uniformly deposited After being coated on the surface of PMMA heat-expandable microspheres, GA / PMMA heat-expandable microspheres are finally obtained. Weigh 2g of GA / PMMA heat-expandable microspheres and mix them evenly with 4g of amine curing agent....

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Abstract

The invention discloses a frequency selection, electromagnetic shielding, heat insulation, light weight and impact resistance integrated three-dimensional fabric composite material which comprises a three-dimensional fabric and filled polymer foam. Wherein the three-dimensional fabric comprises an upper surface layer, a lower surface layer and middle yarns, and the upper surface layer and the lower surface layer are connected through the middle yarns. The three-dimensional fabric foam composite material disclosed by the invention is mature and feasible in preparation process, relatively low in cost, high in preparation speed and suitable for industrial production. The composite material has wide application prospects in the fields of special military vehicle bodies for electromagnetic shielding protection, aircraft bodies, building outer walls and the like. The three-dimensional fabric foam composite material disclosed by the invention is high in adjustability, and simple, convenient and diverse in adjustment strategy. Precise regulation and control of performance such as frequency selection and electromagnetic shielding can be achieved by adjusting the yarn type, the spacer yarn three-dimensional fabric structure, the polymer foam and the functional nanometer filler.

Description

technical field [0001] The invention relates to the technical field of fiber composite materials, in particular to a three-dimensional fabric composite material integrated with frequency selection, electromagnetic shielding, heat insulation, light weight and impact resistance and a preparation method thereof. Background technique [0002] At present, electromagnetic waves are widely used in communication, medical treatment, artificial intelligence and other fields. However, its pollution is extremely harmful to the environment, equipment and human health. In order to solve this problem, more and more attention has been paid to the research of electromagnetic interference shielding materials. Electromagnetic shielding materials mainly include films, foams, fabrics, coatings and other types. Fabrics have received more and more attention because of their mature preparation technology and rapid and industrialized production. Fabrics are not only used in civilian clothing and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D03D25/00D03D11/00D03D1/00D03D15/533D03D15/20D03D15/25D03D15/47D03D15/283D03D13/00
CPCD03D25/005D03D11/00D03D1/00D03D15/533D03D15/20D03D15/25D03D15/47D03D15/283D03D13/00D10B2401/16D10B2101/20D10B2321/0211D10B2331/021
Inventor 钟智丽蔡洁王亮傅宏俊
Owner TIANJIN POLYTECHNIC UNIV
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