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Three-dimensional skeleton graphene foam modified laminated composite and preparation method thereof

A graphene foam and composite material technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve the problems of poor mechanical properties of carbon fiber laminated composite materials, achieve good intrinsic thermal conductivity, improve interlayer The effect of electrical and thermal conductivity

Active Publication Date: 2013-04-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Graphene foam with a three-dimensional continuous structure, or three-dimensional skeleton graphene foam, was not prepared for the first time until 2011 (Nature Material 2011, 10:424-428, CN102674321), and has attracted widespread attention. Applied to the preparation of conductive and thermally conductive composite materials (see CN102732037), such as the graphene / polydimethylsiloxane composite material reported above, when doped with a three-dimensional skeleton graphene mass fraction of 0.5%, the electrical conductivity reaches 10S / cm, J. Mater. Chem 2011, 21:17366-17370 reported that the three-dimensional skeleton graphene has a conductivity of 600S / cm and is applied to solar cells, but the materials obtained by direct compounding of these foams and resins have lower mechanical properties than carbon fiber laminated composites. Poor and has not yet been used to modify laminated composites with three-dimensional framework graphene foams to produce laminated composites with improved electrical and thermal conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1-1) Set the density to 0.01g / cm 3 The flexible three-dimensional skeleton graphene foam is cut into 1mm thick slices for later use;

[0023] (1-2) Lay the three-dimensional skeleton graphene foam sheets obtained above one by one between the layers of continuous carbon fiber unidirectionally reinforced epoxy resin-based prepreg until there is a layer of graphene foam between each layer A thin layer of graphene foam, carbon fiber T300, 3K, epoxy resin 5228 (product of Beijing Aeronautical Materials Research Institute), and a thin layer of graphene foam is laid on the two outer surfaces, and intercalation and surface paving are obtained after compression and shaping Composite preforms of graphene foam sheets;

[0024] (1-3) According to the curing process stipulated in the epoxy resin prepreg, the above-mentioned composite material prefabricated body is subjected to vacuum forming and curing by a conventional molding method to obtain a three-dimensional skeleton graphen...

Embodiment 2

[0027] (2-1) Set the density to 0.012g / cm 3 The flexible three-dimensional skeleton graphene foam is cut into 1.5mm thick slices or 4mm thick slices, a total of 3 pieces and a 12mm thick slice for later use;

[0028](2-2) Place the above-mentioned 1.5mm thick or 4mm thick three-dimensional skeleton graphene foam sheets on the first and second, second and third and second and third continuous carbon fiber unidirectionally reinforced epoxy resin-based prepregs, respectively. The third and fourth layers of carbon fiber are laid between layers, and a 12mm thick graphene foam sheet is pasted on the outside of the first layer of carbon fiber prepreg. There are 24 layers of carbon fiber prepreg, carbon fiber T300, 3K, epoxy resin 5228 (product of Beijing Institute of Aeronautical Materials), after compression and shaping, intercalation and a composite material prefabricated body covered with a layer of graphene foam sheet are obtained;

[0029] (2-3) According to the curing process ...

Embodiment 3

[0032] (3-1) Set the density to 0.004g / cm 3 The flexible three-dimensional skeleton graphene is cut into 2mm thick sheets for later use;

[0033] (3-2) Place the three-dimensional skeleton graphene flakes obtained above one by one between the layers of continuous carbon fiber satin fabric for lamination, carbon fiber T700, 12K, shape and place in a mold of corresponding size to compress and fix to obtain intercalation Composite material preforms of thin sheets;

[0034] (3-3) Using the RTM process, inject liquid benzoxazine (BOZ) resin and Epsilon, a product of Henkel, Germany, into the preform and impregnate it completely, then perform molding and curing according to the process specified by the BOZ resin, and finally obtain RTM molding Benzoxazine resin-based composite articles with improved electrical and thermal conductivity.

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Abstract

The invention discloses a three-dimensional skeleton graphene foam modified laminated composite and a preparation method thereof. A three-dimensional skeleton graphene foam lamina with a three-dimensional continuous structure is intercalated between the continuous carbon fiber laminated composite layers and spread on the surface, based on the excellent intrinsic electrical conductivity and the super intrinsic thermal conductivity of such materials, and the characteristic that the internal three-dimensional continuous structure can eliminate the contact resistance and the thermal resistance, the electrical conductivity and the thermal conductivity of the composite are improved effectively, and the high-strength graphene structure is also likely to have reinforcing and toughening functions to the composite.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional composite materials, and relates to a laminated composite material modified by three-dimensional skeleton graphene foam and a preparation method thereof. Background technique [0002] Continuous carbon fiber reinforced resin-based laminated composites have high specific strength and specific stiffness, and are widely used in aerospace and other fields, and account for an increasing proportion of aircraft materials. However, due to the non-metallic structure And functional characteristics, also brought a number of problems. [0003] First of all, the continuous carbon fiber reinforced resin-based laminated composite material has insufficient conductivity within the layer, and the resin-rich layer between the layers presents high resistance. Composite materials can resist lightning strikes or improve conductivity mainly by directly covering the surface of composite materials with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/04B32B9/04B32B5/18B32B37/00
Inventor 郭妙才益小苏
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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