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Electric conductive continuous fiber-reinforced fabric or prepreg and electric conductive treatment method

A technology for reinforcing fabrics and continuous fibers, applied in fiber processing, chemical instruments and methods, textiles and papermaking, etc., can solve problems such as low conductivity, weight gain scale of composite materials, and cost increase, and achieve simplified preparation process and easy process Amplify and improve the effect of utilization

Inactive Publication Date: 2014-02-05
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main disadvantage of the method of filling conductive particles in contact with electrical conduction is that the conductive efficiency is low. It is often difficult to obtain a good conductive effect when a large amount of conductive particles are filled, and it also leads to increased costs; , its preparation technology and mixing process are generally more complicated
The main disadvantages of hybrid metal fibers and metal strips are the increase in weight of composite materials and the mismatch of scales, while the disadvantages of the hybrid carbon nanotube paper conductive method are that it is difficult to obtain raw materials, high cost, and the process preparation technology is difficult, and its industrial scale is also comparatively large. Difficult, so the technology is currently only in the exploratory stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The implementation process of the technical solution of the present invention is as follows:

[0032] (1-1) Disperse silver nanowires in ethanol or isopropanol or acetone or ethylene glycol or water to form a dispersion with a concentration of 5 mg / mL or 10 mg / mL;

[0033] (1-2) Immerse a piece of carbon fiber fabric, carbon fiber T800, 12K or CCF300, 3K, into the dispersion of silver nanowires obtained in the above step (1-1) with a content of 5 mg / mL or 10 mg / mL, and pull out liquid surface and dry or dry; turn it upside down and impregnate again, and determine the number of impregnations according to the requirements of the loading capacity, and finally obtain a conductive carbon fiber fabric uniformly loaded with silver nanowires. Repeat this step to obtain a plurality of conductive enhanced fabric materials in this intermediate state;

[0034] (1-3) Lay the conductive intermediate fabric obtained in the above (1-2) one by one according to the order and principle o...

Embodiment 2

[0039] The implementation process of the technical solution of the present invention is as follows:

[0040] (2-1) Disperse silver nanowires in a 2:1 (V:V) mixture of methanol or isopropanol or acetone or ethanol and water or water to form a dispersion with a concentration of 2 mg / mL or 4 mg / mL;

[0041] (2-2) Spread 3233 epoxy resin prepreg (product of Beijing Aeronautical Materials Research Institute) or QY9611 epoxy resin prepreg (product of Beijing Aeronautical Manufacturing Engineering Research Institute), prepared by step (2-1) The silver nanowire dispersion liquid is uniformly sprayed onto one or both front and back surfaces, and the spraying times are determined according to the requirements of the loaded amount, so as to obtain a conductive 3233 or QY9611 prepreg intermediate material uniformly loaded with silver nanowires;

[0042] (2-3) Lay the intermediate state conductive prepregs obtained above according to the lay-up design of the original composite material one...

Embodiment 3

[0048] The implementation process of the technical solution of the present invention is as follows:

[0049] (3-1) Disperse the silver nanowires in ethanol to form a 5 mg / mL dispersion, and disperse the carboxy-modified carbon nanotubes in water or acetone or DMF to form a 2 mg / mL or 10 mg / mL dispersion;

[0050] (3-2) The above-mentioned dispersion of carboxy-modified carbon nanotubes (CNTs) with a solid content of 2 mg / mL or 10 mg / mL is attached to the glass fiber fabric by passing the dispersion through the carrier under negative pressure. After drying, immerse the glass fiber fabric that this CNT attaches load again in the ethanol dispersion liquid that silver nanowire content is 5mg / mL, pull out liquid surface and dry, obtain the conductive glass fiber that silver nanowire and carbon nanotube double attach. fabric intermediate state materials;

[0051] (3-3) Lay up the conductive glass fiber fabric intermediate materials obtained by the above-mentioned double loading one...

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Abstract

The invention belongs to the technical field of structural composite materials, and relates to an electric conductive continuous fiber-reinforced fabric or prepreg and an electric conductive treatment method. A continuous fiber-reinforced fabric and / or a prepreg thereof is used as a mechanical carrier and nano electric conductive components are directly loaded on the surface of the continuous fiber-reinforced fabric and / or the prepreg thereof, so that electric conductive functionalized continuous fiber-reinforced fabric or prepreg is obtained; then, a prefabricated structure including a sandwich structure is formed by spreading one layer or multi layers of the fabric or the prepreg mingled with unprocessed fabric or prepreg or all the fabric or the prepreg in different manners; and then, an electric conductive continuous fiber-reinforced structural composite material or sandwich composite material with adjustable electric conductivity and heat conductivity is prepared by a preparation process of a conventional composite material. The electric conductive and heat conductive composite material can fully keep structural mechanical performances of an original composite material.

Description

technical field [0001] The invention belongs to the technical field of structural composite materials, and relates to a conductive continuous fiber reinforced fabric or prepreg and a conductive treatment method. Background technique [0002] It is well known in the art that continuous fiber reinforced resin matrix structural composites are generally electrically insulating, whether these reinforcing fibers are glass fibers, aramid fibers, ultra-high molecular weight polyethylene fibers, ceramic fibers, basalt fibers, or better axial conductivity carbon fiber etc. Therefore, for the purpose of antistatic, electromagnetic shielding, lightning protection, etc., such structural composite materials usually must be conductively treated. For the same reason, the thermal conductivity of this composite material is generally relatively low. [0003] There are two main methods to improve the conductivity of this type of structural composite material. One is to mix conductive componen...

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): C08J5/06C08J5/08C08J5/24C08L63/00C08L79/04C08L79/08D06M11/83D06M11/74B32B27/04B32B27/12B32B27/06
Inventor 益小苏刘伟郭妙才
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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