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Composite conductive film, its preparation method and its application

A technology of composite conductive and conductive thin layers, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve problems such as increasing the gap between carbon fiber-rich resin layers, difficulty in resisting lightning strikes, and high resistance of composite materials , to achieve the effect of simple method, high toughness and high conductivity

Active Publication Date: 2012-11-21
AVIC BEIJING INST OF AERONAUTICAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology of introducing a tough structure between layers improves the toughness of the composite material, it also increases the gap between the carbon fiber resin-rich layers to a certain extent, making the already high resistivity layers even more resistive. Causes greater difficulty for composite materials to resist lightning strikes

Method used

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  • Composite conductive film, its preparation method and its application
  • Composite conductive film, its preparation method and its application
  • Composite conductive film, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The implementation process of the technical solution of the present invention is as follows:

[0030] (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;

[0031] (1-2) The thickness is 53μm, the surface density is 14g / m 2 Nylon non-woven fabric with a thickness of 25μm and a surface density of 8g / m 2 Polyether ether ketone non-woven fabric or thickness of 75μm, surface density of 26g / m 2 Polyimide non-woven fabric with a thickness of 15μm and a surface density of 7g / m 2 Immerse the polyethersulfone non-woven fabric in the dispersion liquid with a silver nanowire content of 5 mg / mL or 10 mg / mL obtained in the above step (1-1), pull it out of the liquid surface and dry it or dry it, turn it off and then Dipping once to obtain a conductive polymer non-woven fabric uniformly loaded with silver nanowires;

[0032] (1-3) Place the above-mentioned conductive poly...

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) The thickness is about 20μm, the surface density is 14g / m 2 Polyaryletherketone porous film (porosity about 40%) or thickness about 8μm, area density 6g / m 2 Polyimide porous film or thickness of about 25μm, surface density of 11g / m 2 Polyetherimide porous film or thickness of about 15μm, surface density of 9g / m 2 The polyetheretherketone porous film is dipped into the silver nanowire dispersion described in (2-1), pulled out of the liquid surface and dried, then dipped twice to obtain a conductive film uniformly loaded with silver nanowires. Polymer porous film;

[0042] (2-3) Lay the conductive polymer porous films obtained above on one by one between the layers of ...

Embodiment 3

[0047] The implementation process of the technical solution of the present invention is as follows:

[0048] (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.

[0049] (3-2) The above-mentioned dispersion of carboxyl-modified carbon nanotubes (CNTs) with a solid concentration of about 2 mg / mL or 10 mg / mL is loaded on a surface with a thickness of 35 μm and an area density of 14 g / mL by filtering under negative pressure. m 2 Nylon fabric with a thickness of 25μm and a surface density of 11g / m 2 Polyether ether ketone fabric or thickness of 45μm, area density of 18g / m 2 After drying, the CNT-loaded thin layer fabric is immersed in the ethanol dispersion with a silver nanowire content of 5mg / mL, pulled out of the liquid surface and dried to obtain silver nanowires and carbon nanowires. Conductive thin layer fabric attached to the tu...

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Abstract

The invention relates to a design and a preparation method of a continuous carbon laminated fiber reinforced resin matrix structure composite material taking account of the conductivity and the high toughness, a corresponding intermediate composite conductive film and a final composite material product. The composite conductive film having a high conductivity and a toughness potential is prepared through utilizing a low-surface-density non-woven fabric having a network structure, a porous film or a fabric as a functional carrier, and loading highly-conductive nano-micro scale silver nanowires and other auxiliary conductive components, such as carbon nanotubes, graphene and the like; and the composite conductive film is disposed between layers of a routine carbon laminated fiber composite material through an intercalation technology, and is molded and cured to prepare the high-conductivity and high-toughness structure composite material. The method is simple to operate, the toughness of the obtained composite material is greatly improved, the resistivity in the layers and the resistivity between the layers are greatly decreased, the caused weight gain of the composite material is extremely small, and the high conductivity and the high toughness of the whole composite material are realized.

Description

technical field [0001] The invention relates to a composite conductive thin layer and its preparation method and application. The technology includes the preparation technology of a conductive thin layer with high conductivity and toughening effect and the overall high conductivity and high toughness structure prepared by using the conductive thin layer. A composite material belongs to the technical field of preparation of functional composite materials. Background technique [0002] Modern aircraft increasingly use continuous carbon fiber-reinforced resin matrix laminated composites as structural materials, but standard continuous carbon fiber-reinforced composites are filled with resin, and their interlayers are rich in resin, thus resulting in composite thickness direction and in-plane vertical fiber direction The resistance is high, and when struck by lightning, the charge is difficult to remove, and the high current flux will cause the composite material to be damaged o...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/06B32B9/02B32B9/04B32B15/02B32B15/04B32B15/08B32B27/04
CPCB32B9/00B32B2311/08
Inventor 益小苏郭妙才刘刚赵文明刘立朋崔海超
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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