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Graphene composite membrane material as well as preparation method and application thereof

A graphene composite and graphene film technology, applied in the field of composite materials, can solve the problem that the wave-absorbing performance of graphene composite film materials cannot meet the application requirements

Active Publication Date: 2022-07-15
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of this application is to provide a graphene composite membrane material and its preparation method and application, aiming to solve the technical problem that the microwave absorption performance of the graphene composite membrane material prepared by the existing technology is difficult to meet the application requirements

Method used

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  • Graphene composite membrane material as well as preparation method and application thereof
  • Graphene composite membrane material as well as preparation method and application thereof
  • Graphene composite membrane material as well as preparation method and application thereof

Examples

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preparation example Construction

[0032] A preparation method of a graphene composite membrane material, comprising the following steps:

[0033] After the graphene powder is mixed with the dispersant, a precursor slurry is obtained;

[0034] The precursor slurry is coated on the hydrophobic substrate, dried to form a film, and peeled off to obtain a graphene film;

[0035] A dielectric film is covered on the surface of the graphene film to obtain a graphene composite film material;

[0036] Wherein, the dispersant comprises: at least one of graphene oxide aqueous solution and aqueous polyacrylic acid emulsion;

[0037] The dielectric film includes at least one of a flexible polydimethylsiloxane film and a polyvinyl alcohol film.

[0038] In this application, graphene is used as an absorbent, and an aqueous solution of graphene oxide or an aqueous polyacrylic acid emulsion is used as a dispersant to prepare a precursor slurry, wherein graphene oxide and graphene in the aqueous solution of graphene oxide have...

Embodiment 1

[0055] The present embodiment provides a graphene composite film material with adjustable wave absorption properties, and the preparation method thereof includes the following steps:

[0056] Step 1: prepare a graphene oxide aqueous solution with a concentration of 12 mg / mL;

[0057] Step 2: take by weighing the graphene powder, the quality of which is 20% of the quality of the graphene oxide powder used in the graphene oxide aqueous solution;

[0058] Step 3: slowly adding the graphene powder to the graphene oxide aqueous solution for many times under stirring conditions to obtain a precursor slurry;

[0059] Step 4: Brush the precursor slurry in a 350mm PTFE square tank for drying to form a film. The drying condition is blast drying at 40°C, and the thickness of the graphene film after drying is 130 μm to 140 μm;

[0060] Step 5: After being completely dried, peel off the graphene film material from the PTFE square groove;

[0061] Step 6: Cover the obtained graphene film ...

Embodiment 2

[0063] The difference between this example and Example 1 is that the mass of the graphene powder is 50% of the mass of the graphene oxide powder used in the graphene oxide aqueous solution, and the remaining steps are the same as those in Example 1 to obtain a graphene composite membrane material.

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Abstract

The invention discloses a graphene composite membrane material as well as a preparation method and application thereof, and relates to the field of composite materials. The preparation method comprises the following steps: mixing graphene powder with a dispersing agent to obtain precursor slurry; coating a hydrophobic base material with the precursor slurry, and performing drying, film forming and stripping to obtain a graphene film; covering the surface of the graphene film with a dielectric film to obtain a graphene composite film material; wherein the dispersing agent comprises at least one of a graphene oxide aqueous solution and a water-based polyacrylic acid emulsion; the dielectric film comprises at least one of a flexible polydimethylsiloxane film and a polyvinyl alcohol film. The preparation method aims at solving the technical problem that the wave-absorbing performance of a graphene composite film material prepared by an existing process is difficult to meet application requirements.

Description

technical field [0001] The present application relates to the field of composite materials, and in particular, to a graphene composite membrane material and a preparation method and application thereof. Background technique [0002] Graphene usually exists in the form of powder, and it needs to exist in a specific form as a wave absorbing material in practical applications. Among them, the graphene wave absorbing material in the form of thin film is light, flexible, large-area, rollable, conformable, etc. It has high use value and rich application scenarios. [0003] However, the microwave absorbing properties of the graphene composite film materials prepared by the prior art are difficult to meet the application requirements, which reduces its application potential in the field of wave absorbing materials and hinders the large-scale application of graphene films in the field of wave absorbing materials. SUMMARY OF THE INVENTION [0004] The main purpose of this applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/28B32B27/30B32B27/08C08L33/00C08K3/04C08J5/18B29C41/12B29C41/08B29C41/04B29L7/00
CPCB32B9/007B32B9/045B32B27/283B32B27/306B32B27/308B32B27/08C08J5/18B29C41/12B29C41/08B29C41/04B29C41/003B32B2307/212C08J2333/00C08K3/042B29L2007/002
Inventor 叶星柯文琴龙索军营程红霞
Owner CHENGDU AIRCRAFT INDUSTRY GROUP