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Controllable reduced graphene oxide modified carbon fiber and application thereof

A graphene and carbon fiber technology, applied in the directions of carbon fiber, fiber treatment, electrolytic coatings, etc., can solve the problems of the difference in the improvement effect of graphene oxide on the bonding performance of carbon fiber and resin matrix, etc.

Active Publication Date: 2022-02-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These differences lead to significant differences in the improvement effect of graphene oxide on the bonding performance of carbon fiber and resin matrix.
However, in the prior art, there is no relevant research to propose how to optimize the graphene oxide for the preparation of carbon fiber composites.

Method used

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  • Controllable reduced graphene oxide modified carbon fiber and application thereof
  • Controllable reduced graphene oxide modified carbon fiber and application thereof
  • Controllable reduced graphene oxide modified carbon fiber and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation of the graphene oxide of embodiment 1 different oxygen contents

[0045] Ultrasonic reduction under alkaline conditions improved the Hummer method (according to the method of Acs Nano, 4 (2010) 4806) synthesized GO, cell crushing 60min, crushing power 500w, ultrasonic on 0.5s off 0.5s, GO / water dispersion The concentration is 0.5mg / ml. An 8 mol / L NaOH solution was prepared, the pH of the dispersion was adjusted, the ultrasonic time was 30 min, and the reaction temperature was 50°C.

[0046] The pH was adjusted to 3.8, 11, 12 and 13 respectively, and 4 samples were prepared, which were denoted as GO 3.8 、GO 11 、GO 12 and GO 13 .

Embodiment 2

[0047] The carbon fiber of embodiment 2 graphene oxide modification

[0048]Using SYT55S as raw material, desizing it with acetone extraction method to remove slurry and impurities. Graphene oxide with different oxygen content was deposited on CF by anodic EPD. During the deposition of negatively charged graphite oxide flakes, a graphite plate (cathode) was placed opposite the CF anode. The pH of the electrolyte of the 250 mg / ml graphene oxide suspension was adjusted to 10 with 0.1 mol / l NaOH solution. The deposition voltage is 20V, and the deposition time is 20min. The graphene oxide-modified carbon fibers prepared from the four GO samples in Example 1 are respectively denoted as CF / GO 3.8 , CF / GO 11 , CF / GO 12 and CF / GO 13 .

Embodiment 3

[0049] Embodiment 3 graphene oxide modified carbon fiber / resin composite material

[0050] CFs with different morphologies of graphene oxide structures were impregnated with epoxy resin to obtain prepregs. Then, after adding the curing agent, put the prepreg into the compression mold according to the control program (80°C@1h and 120°C@2h at 5MPa, 150°C@3h and 180°C@1h at 10MPa) into the compression mold for curing and molding. The CF volume fraction was maintained within the range of 50±1.5%. The curing agent can be 4,4-diaminodiphenylsulfone, 4,4-diaminodiphenylmethane, 3,3'-dichloro-4,4'-diaminobisone commonly used in the prior art Phenylmethane, diethyltoluenediamine, m-phenylenediamine, etc., 4,4-diaminodiphenylmethane is selected as the curing agent in this embodiment.

[0051] In order to further illustrate the technical solution of the present invention, the samples prepared in Examples 1-3 are tested and characterized through experiments below.

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Abstract

The invention belongs to the technical field of carbon fiber composite materials, and particularly relates to a controllable reduced graphene oxide modified carbon fiber and application thereof. The graphene oxide is reduced in a heat treatment mode in the aqueous alkali, the content of non-carboxyl oxygen of the graphene oxide is reduced, and the prepared graphene oxide can be combined with the carbon fibers to form a special pitaya skin-shaped microstructure. The microstructure is beneficial to increase of the surface roughness of the carbon fiber and transmission of interface load, and can improve the wettability of the carbon fiber and a resin matrix, thereby enhancing the bonding performance of the carbon fiber and the resin matrix. The resin-based composite material prepared from the graphene oxide modified carbon fiber has high transverse tow tensile strength, interlayer shear strength, high and low temperature cycle resistance and the like, and is suitable for manufacturing traffic equipment, sports equipment, aerospace equipment or national defense military products.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber composite materials, and in particular relates to a controllable reduced graphene oxide modified carbon fiber and its application. Background technique [0002] Carbon fiber composites have high specific strength, high modulus, low density and excellent heat resistance, and are ideal reinforcement materials for advanced polymer composites. Therefore, carbon fiber composite materials are widely used in the national defense industry, and they are also widely used in civil fields such as wind power generation, sports and leisure, transportation, automobile industry, energy, chemical industry, and construction. [0003] The interface performance between carbon fiber and matrix is ​​one of the key factors affecting the mechanical properties of carbon fiber reinforced composites. Untreated carbon fiber is composed of a large number of inert graphite crystallites. Its surface is non-polar, has low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74C08L63/00C08K9/02C08K7/06C08J5/06C25D13/02C25D13/16D06M101/40
CPCD06M11/74C08J5/06C25D13/02C25D13/16D06M2101/40C08J2363/00C08K9/02C08K7/06Y02E10/72
Inventor 邹华维张雪琴梁梅
Owner SICHUAN UNIV