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Hybrid modified highly conductive and highly toughened structural composite material and preparation method thereof

A composite material, highly conductive technology, used in chemical instruments and methods, synthetic resin layered products, transportation and packaging, etc. Aviation composite materials such as lightning protection and electrostatic shielding can improve electrical conductivity and toughness, and meet the effects of lightning protection and electrostatic shielding.

Active Publication Date: 2019-02-01
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, it is difficult to prepare a complete carbon nanotube array with a large area and a large number of aligned arrangements, and to effectively transfer it to the interlayer of the composite material, which is not suitable for industrial batch applications.
[0006] In summary, it is difficult to further improve the electrical conductivity and toughness of composite materials by various methods of modifying reinforcing fibers or interlayers alone, and it is difficult to meet the requirements of lightning protection and electrostatic shielding of aviation composite materials.

Method used

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  • Hybrid modified highly conductive and highly toughened structural composite material and preparation method thereof
  • Hybrid modified highly conductive and highly toughened structural composite material and preparation method thereof

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preparation example Construction

[0021] The preparation method of the hybrid modified high-conductivity and high-toughening structural composite material as described above is characterized in that: the preparation steps are as follows:

[0022] 1. Determine the number of layers of the hybrid modified high-conductivity and high-toughening structural composite material and the material types of the nano-hybrid modified continuous fiber reinforced layer 3 and the nano-organic porous toughened membrane 4;

[0023] 2. Preparation of continuous fibers or fabrics modified by nano-hybridization: Graft carbon nanotubes on the surface of continuous fibers by chemical vapor deposition, and the catalyst precursor used is the organometallic compound ferrocene dissolved in the organic solvent xylene , its concentration is 0.05g / ml, in inert gas Ar, reducing gas hydrogen H 2 and acetylene gas C 2 h 2 In the atmosphere, at a temperature of 600 ° C ~ 700 ° C, the growth time is 1 min ~ 60 min, where Ar, H 2 with C 2 h 2...

Embodiment 1

[0031] 1. Determine the material type of the hybrid modified high-conductivity and high-toughening structural composite material. In the nano-hybrid modified continuous fiber reinforcement layer 3, QY9916 epoxy resin is used as the matrix and T700 grade carbon fiber with a diameter of 7 μm is used as the continuous fiber reinforcement Body and carbon nanotubes are modified materials, and the conductive nanomaterial in the nano-organic porous toughened film 4 is a silver nanowire with a length of about 50 μm and an average diameter of 70 nm. The organic film is a nylon non-woven fabric with a thickness of 500 nm. According to the thickness of the composite material sample, it is determined that the number of layers of the continuous fiber reinforced layer 3 is 24 layers, and the number of layers of the nano-organic porous toughened membrane 4 is 23 layers.

[0032] 2. Preparation of nano-hybrid modified continuous fibers: In-situ growth of carbon nanotubes with a grafted mass fr...

Embodiment 2

[0039] 1. Determine the material type of the hybrid modified high-conductivity and high-toughening structural composite material. In the nano-hybrid modified continuous fiber reinforced layer 3, QY9916 epoxy resin is used as the matrix and T800 grade carbon fiber with a diameter of 7 μm is used as continuous fiber reinforcement Body and carbon nanotubes are modified materials, and the conductive nanomaterials in the nano organic porous toughened film 4 are silver nanowires with a length of about 50 μm and an average diameter of 120 nm and multi-walled carbon nanotubes with a purity greater than 95%, organic thin films Use PEK-C.

[0040] 2. Preparation of continuous fibers or fabrics modified by nano-hybridization: In-situ growth of carbon nanotubes with a grafted mass fraction of 1 wt% on the surface of continuous carbon fibers by chemical vapor deposition. The diameter of the carbon nanotubes is 20nm and the length is 5 μm. The catalyst precursor used is an organometallic co...

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Abstract

The invention belongs to the technical field of composite materials with combined structural and functional performance, and relates to a hybrid modified composite material with a high-conductivity and high-toughness structure and a preparation method of the hybrid modified composite material. The composite material adopts a lamination structure formed by n nanohybrid modified continuous fiber enhancement layers (3) and (n-1) layers of organic-nano porous toughening films (4) through staggered laying. The composite material is prepared through steps as follows: determination of material types; preparation of nanohybrid modified continuous fibers or fabric; preparation of the organic-nano porous toughening films (4); preparation of the hybrid modified composite material with the high-conductivity and high-toughness structure. According to the hybrid modified composite material with the high-conductivity and high-toughness structure and the preparation method of the hybrid modified composite material, conductivity and toughness of the composite material are further improved, and the lightning-proof and electrostatic-shielding requirements of the aeronautical composite material are met.

Description

technical field [0001] The invention belongs to the technical field of structural-functional composite materials, and relates to a hybrid modified high-conductivity and high-toughening structural composite material and a preparation method thereof. Background technique [0002] Advanced resin-based composites generally refer to continuous fibers or fabrics for reinforcement and resin matrix for bonding, with high specific strength, specific stiffness, fatigue resistance, corrosion resistance and many other excellent properties and obvious reduction. Heavy effects, in the fields of aerospace, transportation, new energy and other fields are gradually replacing metals and their alloy materials for large-scale applications, and the application demand is still accelerating. Compared with metals, composite materials, especially the in-plane perpendicular to the fiber direction and the out-of-plane along the thickness direction, have poor conductivity and performance, and are sensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/02B32B27/12B32B27/18B32B3/24B32B37/00B32B38/18
CPCB32B3/266B32B5/26B32B27/12B32B27/18B32B37/00B32B38/1808B32B2250/20B32B2262/02B32B2307/202B32B2307/212B32B2307/558B32B2605/18
Inventor 贺德龙顾善群益小苏王程成韦家虎
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS