Graphene wave-absorbing composite material skin forming method

A composite material and molding method technology, applied in the field of aerospace material manufacturing, can solve the problems of less absorbing skin, use, no liquid molding technology, etc. The effect of improving the interface binding performance

Active Publication Date: 2021-01-26
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with a large number of researches on the technology of honeycomb sandwich absorbing composite materials, there are few technical researches on the absorbing skin, and there is no report on the application of liquid forming technology to the manufacture of such parts, so this research is of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a graphene absorbing composite skin forming method, comprising the following steps:

[0038] (1) Preparation of graphene laminates: Lay the cut graphene single-layer film on the sticky toughened resin film. After one side is covered, spread it on the other side of the graphene film Resin film of the same material. After laying, keep the backing paper on both sides of the resin film, and cut it into the corresponding size for later use.

[0039] (2) Lamination of skin prefabricated body: Lay graphene laminated material and carbon fiber prefabricated body alternately. After the lamination is completed, use vacuum bag to seal the bag, and heat and pre-compact after vacuuming. After the above steps are completed, the surface of one side of the preform is alternately covered with the quartz fiber preform and the aforementioned toughened resin film to form a wave-transparent layer. After the above work is completed, it is sealed with a vacuum bag ag...

Embodiment 2

[0043] In this embodiment, on the basis of the above embodiments, the specific process for preparing a graphene laminate with paveability in the step (1) is further defined as follows:

[0044] (1.1) Take a graphene monolayer film with a suitable thickness and cut it into a suitable size;

[0045] (1.2) At room temperature, spread it flat on the adhesive toughened resin film;

[0046] (1.3) After the paving is completed, the other side of the graphene film is also covered with a viscous toughened resin film of the same material;

[0047] (1.4) After the paving is completed, keep the backing paper on both sides of the resin film to obtain a graphene laminate with paving properties. Other parts of this embodiment are the same as those of the foregoing embodiment, and will not be repeated here.

Embodiment 3

[0049] In this embodiment, on the basis of the above-mentioned embodiments, it is further limited that in the step (1.1), the thickness of the obtained graphene single-layer film is 0.1 mm, and it is cut into a cube film of 1000*1000 mm. Other parts of this embodiment are the same as those of the foregoing embodiment, and will not be repeated here.

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PUM

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Abstract

The invention discloses a graphene wave-absorbing composite material skin forming method. The method comprises the following steps: 1) preparing a graphene laminated material with paving property; 2)preparing a skin prefabricated body by utilizing a plurality of layers of alternately paved graphene laminated materials and carbon fiber prefabricated bodies; 3) taking high-conductivity carbon nanographene fiber as a sewing line, and performing two-dimensional sewing on the skin prefabricated body to obtain a fiber prefabricated body; and 4), processing the fiber prefabricated body by using anRFI liquid molding process to obtain a graphene absorbing composite material skin. According to the graphene wave-absorbing composite material skin forming method provided by the invention, large-sizegraphene materials and the like are used as raw materials, an existing composite material prefabricated body forming technology and a resin film infusion (RFI) liquid forming method are creatively combined, and the method has the advantages of leading edge, operability and practicability and is suitable for wide application and popularization.

Description

technical field [0001] The invention relates to the technical field of aviation material manufacturing, in particular to a skin forming method of a graphene wave-absorbing composite material. Background technique [0002] Vigorously developing light-weight, broadband radar stealth absorbing materials has always been an important topic in aerospace manufacturing technology. Its basic working principle is to confine the incident electromagnetic wave inside the material through the electromagnetic parameter adjustment design of the material, and convert the electromagnetic energy into heat energy and other forms of loss through various loss mechanisms. Absorbing materials for aerospace can generally be divided into coating materials and structural materials. The early wave-absorbing materials are mainly wave-absorbing coating materials, and their effective wave-absorbing components are metal ferrites. Such materials have disadvantages such as high density, easy to fall off, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/44B29C70/54
CPCB29C70/342B29C70/443B29C70/54B29C70/542B29C70/543
Inventor 邬祚强何凯罗维杨龙英
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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