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Polyaniline modified carbon fiber composite material as well as preparation method and application thereof

A composite material and carbon fiber technology, applied in the field of carbon fiber surface treatment, can solve the problems of manufacturing carbon fiber composite materials, achieve good wettability, huge application advantages, and enhanced interface polarization loss

Inactive Publication Date: 2021-06-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no mature technology to manufacture carbon fiber composite materials that meet the requirements

Method used

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  • Polyaniline modified carbon fiber composite material as well as preparation method and application thereof
  • Polyaniline modified carbon fiber composite material as well as preparation method and application thereof
  • Polyaniline modified carbon fiber composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0042] Such as figure 1 As shown, a preparation method of a polyaniline-modified carbon fiber composite material with excellent interfacial properties and electromagnetic shielding properties includes:

[0043] (1) Soak the carbon fibers in acetone for 48-72 hours to remove the size and then dry them in an oven at 80°C for later use. The selected carbon fibers are preferably carbon fiber cloth, and the size is not specifically limited. It is preferably cut to 100×100mm;

[0044] (2) Oxygen plasma surface treatment is carried out on the carbon fiber (PCF) after desizing, the treatment power is preferably 400-600W, and the treatment time is preferably 5-10min;

[0045] (3) Prepare an aniline monomer dispersion containing a dopant, put the carbon fiber (OCF) obtained in step (2) into the aniline monomer solution for pre-soaking, and the pre-soaking time is preferably 60-120min;

[0046] The dopant is hydrochloric acid, sulfuric acid, phosphoric acid, sulfosalicylic acid, camphor...

Embodiment 1

[0051] Concrete process steps adopt:

[0052] (1) Cut the carbon fiber cloth into 100×100mm, soak it in acetone for 72 hours to remove the size, and then dry it in an oven at 80°C for later use;

[0053] (2) Carry out oxygen plasma surface treatment to the carbon fiber (PCF) after desizing, the treatment power is 600W, and treatment time is 10min;

[0054] (3) Disperse 0.09mol of aniline monomer in 200ml of 1mol / L hydrochloric acid solution to prepare aniline monomer solution, and immerse the carbon fiber (OCF) obtained in step (2) in the aniline solution for 2 hours to fully absorb the aniline monomer on the carbon fiber surface;

[0055] (4) Disperse 0.045mol of ammonium persulfate in 200ml of 1mol / L hydrochloric acid solution to prepare an initiator solution. After pre-cooling, slowly add to the aniline monomer solution obtained in step 3 and stir evenly. Aniline monomer solution occurs near 0°C. The in-situ polymerization reaction of body on carbon fiber surface, the pol...

Embodiment 2

[0058] The steps of this example are basically the same as those of Example 1, except that the polyaniline polymerization time in step (4) is 3.0 h.

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Abstract

The invention discloses a polyaniline modified carbon fiber composite material with excellent interface performance and electromagnetic shielding performance, and a preparation method and application thereof. The preparation method comprises the steps: carrying out oxygen plasma surface treatment on desized carbon fiber, adding the oxidized carbon fiber into an aniline monomer solution for soaking, adding an initiator, and coating the surface of the carbon fiber with polyaniline nanoparticles by an in-situ chemical oxidation polymerization method; and pre-impregnating the polyaniline-coated carbon fibers with a composite solution of epoxy resin, a curing agent and an accelerant, and carrying out hot press molding to obtain the polyaniline nanoparticle-modified carbon fiber composite material. The polyaniline modified carbon fiber composite material has excellent interface bonding performance and electromagnetic shielding performance, has important significance for improving the use stability and diversity of the carbon fiber composite material, does not need to add any strong acid or other strong oxidants in the preparation process, has small damage to the fiber, is non-toxic and harmless in the whole in-situ polymerization process, and has wide application prospects and huge application advantages.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber surface treatment, and specifically relates to a polyaniline-modified carbon fiber composite material with excellent interface performance and electromagnetic shielding performance, a preparation method and an application thereof. Background technique [0002] Carbon fiber reinforced resin matrix composites (CFRP) have broad application prospects in the fields of aviation, aerospace, and navigation due to their excellent mechanical properties, corrosion resistance, structural designability, and electrical conductivity. However, pure carbon fiber has a smooth surface and is chemically inert, and the interfacial bonding of CFRP as a structural reinforcement material is weak, and interfacial peeling or fiber delamination often occurs. As a functional material, CFRP often exhibits low electromagnetic wave shielding and absorption properties due to its simple structure and low electrical conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L63/00C08K9/04C08K7/06
CPCC08J5/06C08J2363/00C08K9/08C08K7/06
Inventor 鄢定祥孔威威李忠明
Owner SICHUAN UNIV
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