Modified carbon fiber as well as preparation method and application thereof

A technology for modifying carbon and carbon fibers, applied in carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of limited improvement of carbon fiber surface wettability, and the interface properties of modified carbon fibers need to be further improved, and achieve excellent mechanical strength and Effects of interfacial properties, contact angle reduction, interfacial shear strength, and interlaminar shear strength enhancement

Active Publication Date: 2022-03-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method can only improve the surface wettability of carbon fibers to a limited extent, and the interfacial properties of the modified carbon fibers need to be further improved.

Method used

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  • Modified carbon fiber as well as preparation method and application thereof
  • Modified carbon fiber as well as preparation method and application thereof
  • Modified carbon fiber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1, prepare the carbon fiber after chitosan encapsulation

[0053] Step 1: Preparation of OCFs

[0054] Sizing carbon fiber T700 (purchased from Japan Toray Co., Ltd.) was refluxed in acetone at 90°C for 60 hours by Soxhlet extraction method, and then vacuum-dried overnight at 80°C for later use. The desized carbon fibers are named DCFs. Subsequently, the DCFs were placed in AgNO at 70 °C 3 / K 2 S 2 o 8 solution (in solution, AgNO 3 The concentration is 0.01mol / L, K 2 S 2 o 8 Concentration of 0.1mol / L) in oxidized for 1h, and then repeatedly washed with deionized water and dried to obtain oxidized DCFs, named OCFs.

[0055] Step 2: Preparation of OCFs-CS1

[0056] Prepare an aqueous acetic acid solution with a concentration of 3mol / L, dissolve 30mg of chitosan (CS) in 100mL of the above aqueous acetic acid solution, and mix thoroughly under ultrasound. Immerse OCFs in the mixed liquid, soak and sizing at room temperature for 5min. After washing, the...

Embodiment 2

[0057] Embodiment 2, prepare the carbon fiber after chitosan encapsulation

[0058] According to the method of Example 1, the only difference is that the amount of chitosan in the second step is modified from 30 mg to 59 mg to obtain chitosan-encapsulated carbon fibers, which are named OCFs-CS2.

Embodiment 3

[0059] Embodiment 3, prepare the carbon fiber after chitosan encapsulation

[0060] According to the method of Example 1, the only difference is that the amount of chitosan in the second step is modified from 30 mg to 89 mg to obtain chitosan-encapsulated carbon fibers, named OCFs-CS3.

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Abstract

The invention provides a modified carbon fiber as well as a preparation method and application thereof, and belongs to the field of modified carbon fibers. According to the preparation method disclosed by the invention, the modified carbon fiber OCFs-CS is obtained by utilizing the biomass polymer to encapsulate the oxidized carbon fiber. Compared with unmodified carbon fibers, the monofilament tensile strength of OCFs-CS is obviously improved, and the interfacial shear strength and interlayer shear strength between OCFs-CS and a resin matrix are also obviously improved at the same time. According to the preparation method disclosed by the invention, a carbon nano tube is further grafted on the OCFs-CS, so that the modified carbon fiber OCFs-CS-CNTs is obtained. Compared with OCFs-CS, the monofilament tensile strength of the OCFs-CS-CNTs is further improved, and the interfacial shear strength and interlayer shear strength between the OCFs-CS-CNTs and the resin matrix are further improved at the same time. The modified carbon fiber has excellent mechanical strength and interface performance, and has wide application prospects in the fields of aerospace, transportation tools, energy equipment and the like.

Description

technical field [0001] The invention belongs to the field of modified carbon fibers, and in particular relates to a modified carbon fiber with excellent mechanical strength and interfacial properties, a preparation method and application thereof. Background technique [0002] Carbon fiber is a material with high strength, high modulus, and excellent mechanical properties. Its carbon content is more than 95%. It is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fibers. Carbon fiber has many excellent properties, its specific gravity is less than 1 / 4 of steel, but its strength is higher than that of steel, and it has corrosion resistance, high modulus, no creep, ultra-high temperature resistance and fatigue resistance in non-oxidizing environment Good performance. In addition, it not only has the excellent characteristics of carbon materials, but also has the softness and processability of textile fibers. It is a new type of reinforcing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/03C08J5/06C08L63/00D06M101/40
CPCD06M15/03C08J5/06C08J2363/00D06M2101/40
Inventor 邹华维张程梁梅张雪琴
Owner SICHUAN UNIV
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