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Intelligent composite material and preparation method and application thereof

A composite material and intelligent technology, applied in the direction of analysis of materials, material resistance, and material analysis through electromagnetic means, can solve the problems of material original performance reduction, inability to self-repair, inability to locate damage, etc., to achieve damage repair and improve motion Speed, easy compound effects

Active Publication Date: 2021-04-23
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing composite materials mainly have the following deficiencies: 1. It is impossible to locate the damage, and it can only be qualitatively judged that there is damage; 2. , unable to self-repair; 3. It is difficult to repair the designated area; 4. The sensor needs to be attached or embedded in the material, which will reduce the original performance of the material

Method used

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  • Intelligent composite material and preparation method and application thereof
  • Intelligent composite material and preparation method and application thereof
  • Intelligent composite material and preparation method and application thereof

Examples

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preparation example Construction

[0056] Another aspect of the embodiments of the present invention provides a method for preparing a smart composite material comprising:

[0057] Provide a conductive medium and form a porous conductive network structure;

[0058] Electrodes are arranged on the edge of the porous conductive network structure to make a thin film sensor of conductive material;

[0059] Composite the conductive material film sensor with the resin-based material to obtain an intelligent composite material;

[0060] Alternatively, the conductive medium or the porous conductive network structure composed of the conductive medium is first compounded with the resin-based material, and the composite material is obtained after curing;

[0061] Then electrodes are arranged on the edge of the composite material to obtain an intelligent composite material.

[0062] In some preferred embodiments, the porous conductive network structure is a two-dimensional film-like structure or a three-dimensional struct...

Embodiment 1

[0098] Embodiment 1 carbon nanotube film composite material

[0099] Add 20 mg of polyvinylpyrrolidone to 50 mg of carbon nanotubes, ultrasonically disperse in 500 ml of water for 30 min, and obtain a CNT film by vacuum filtration, with a thickness of 20 μm. The CNT film was cut into a rectangle of 10 cm × 10 cm, and 16 electrodes were evenly arranged on 4 sides, and a copper foil electrode with a width of 3 mm was pasted on the surface of the CNT film with conductive silver paste to obtain a CNT film sensor. Then compound the CNT thin film sensor with the resin-based composite material, lay the unidirectional epoxy resin glass fiber prepreg orthogonally, lay 5 layers, and place the CNT sensor on the top layer, so that the CNT sensor is directly preimpregnated with the upper glass fiber The epoxy resin in the material is contacted, and finally hot-pressed to obtain a smart composite material. Imaging of damage is achieved by applying excitation current to different electrodes...

Embodiment 2

[0100] Embodiment 2 graphene film composite material

[0101] Add 10 mg of graphene to 10 mg of SDBS, ultrasonically disperse in 500 ml of water for 30 minutes, and obtain a graphene film by coating method, the thickness of the graphene film is 0.1 μm. Cut the graphene film into a circle with a diameter of 10 cm, arrange 24 electrodes evenly on the edge of the circle, and paste it on the surface of the graphene film with copper conductive tape as electrodes to obtain a graphene film sensor. Then the graphene film sensor is combined with the resin matrix composite material, the unidirectional epoxy resin glass fiber prepreg is laminated orthogonally, and 10 layers are laid, and the graphene sensor is placed in the middle layer, so that the graphene sensor is directly combined with the glass fiber prepreg. Epoxy resin contact in impregnation and finally thermocompression molding to obtain smart composites. Imaging of damage is achieved by applying excitation current to differen...

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Abstract

The invention discloses an intelligent composite material as well as a preparation method and application thereof. The preparation method comprises the following steps of: arranging an electrode at the edge of a porous conductive network structure to prepare a conductive material film sensor; and compounding the conductive material film sensor with a resin-based material, or compounding a conductive medium or a porous conductive network structure formed by the conductive medium with a resin-based material and curing the compound to obtain a composite material, and then arranging an electrode at the edge of the composite material to obtain the intelligent composite material. The film-shaped network structure is made of the conductive material, and damage can be detected and positioned through the conductive network structure; meanwhile, the composite material is easily compounded with a resin-based material, and the mechanical property of the composite material is not reduced; moreover, the intelligent composite material disclosed by the invention can be used for self-monitoring, positioning the damage and displaying the damage in an imaging manner, and can further be used for carrying out fixed-point self-repairing on the specified damage without influencing other regions.

Description

technical field [0001] The invention relates to a nano-composite material, in particular to a damage-monitoring and self-repairing nano-intelligent composite material, a preparation method thereof, and an application thereof, belonging to the technical field of nano-composite materials. Background technique [0002] Compared with metal materials, fiber-reinforced resin-based composite materials have the advantages of high specific strength, high specific modulus, fatigue resistance and strong designability, and have been widely used in aerospace, machinery, construction, shipbuilding, sports, medical and other fields . Among them, due to its light weight and high strength, it has been more and more widely used and demanded in aerospace vehicles and other fields that have strict requirements on structural weight. For example, the Boeing Company of the United States and the Airbus Company of Europe have used composite materials extensively in their latest aircraft: in Boeing'...

Claims

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Application Information

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IPC IPC(8): H01B5/14H01B13/00G01N27/04
CPCH01B5/14H01B13/0026G01N27/041
Inventor 曲抒旋吕卫帮巩文斌
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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