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Method for performing surface modification treatment to carbon fiber through electrochemical polymerization and carbon fiber composite material

A technology of surface treatment and composite materials, which is applied in fiber processing, textiles and papermaking, etc., can solve the problems of composite material mechanical properties decline, poor bonding between fibers and matrix, unfavorable fiber and matrix infiltration, etc., to achieve enhanced mechanical properties, improve cohesive effect

Active Publication Date: 2018-11-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The carbon fiber prepared after high temperature carbonization causes the escape of surface active elements and the enrichment of carbon elements due to the high temperature, resulting in a high inertness on the surface of the fiber. Poor, it is not conducive to the infiltration between the fiber and the matrix, resulting in a decrease in the mechanical properties of the composite material

Method used

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  • Method for performing surface modification treatment to carbon fiber through electrochemical polymerization and carbon fiber composite material
  • Method for performing surface modification treatment to carbon fiber through electrochemical polymerization and carbon fiber composite material
  • Method for performing surface modification treatment to carbon fiber through electrochemical polymerization and carbon fiber composite material

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Experimental program
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Effect test

Embodiment 1

[0043] Add 37.5ml of graphene oxide solution with a concentration of 4mg / ml into 400ml of electrolytic sulfuric acid solution with a concentration of 0.1mol / L. After stirring at a high speed, reduce the stirring speed to a low speed, and then add a single diacetone acrylamide until 500ml of mixed electrolyte solution was obtained, and left to stand for 12 hours; then, carbon fiber was used as the anode, graphite plate was used as the cathode, and the DC output was constant voltage, and the current density of the electrochemical polymerization process was controlled at 1.5mA / cm 2 , the electrochemical polymerization time is 2min. After the electrochemical polymerization treatment is completed, the carbon fibers are taken out, washed with deionized water, and then dried in an oven at 60° C. to obtain modified carbon fibers.

[0044] The scanning electron microscope image of the modified carbon fiber is as follows figure 2 shown, with figure 1 In contrast, there is a certain g...

Embodiment 2

[0050] Add 37.5ml of graphene oxide solution with a concentration of 4mg / ml into 400ml of sulfuric acid solution with a concentration of 0.1mol / L, after stirring at a high speed, reduce the stirring speed to a low speed, and then add monomer with a concentration of 0.1mol / L while stirring Acrylic acid until 500ml of mixed electrolyte solution is obtained, let it stand for 12h; then, use carbon fiber as anode, graphite plate as cathode, DC output in constant voltage mode, and control the current density of the electrochemical polymerization process to 1.5mA / cm 2 , the electrochemical polymerization time is 2min. After the electrochemical polymerization treatment, the carbon fibers were taken out, washed with deionized water, and dried in an oven at 60° C. to obtain modified carbon fibers.

[0051] The scanning electron microscope image of the modified carbon fiber is as follows image 3 shown, with figure 1 In contrast, there is a certain groove structure on the surface of th...

Embodiment 3

[0057] Add 37.5ml of graphene oxide solution with a concentration of 4mg / ml into 400ml of electrolytic sulfuric acid solution with a concentration of 0.1mol / L. After stirring at a high speed, reduce the stirring speed to a low speed, and then add a single phenol until 500ml of mixed electrolyte solution was obtained, and left to stand for 12 hours; then, with carbon fiber as the anode and graphite plate as the cathode, the DC output was constant voltage, and the current density of the electrochemical polymerization process was controlled at 1.5mA / cm 2 , the electrochemical polymerization time is 2min. After the electrochemical polymerization treatment is completed, the carbon fibers are taken out, washed with deionized water, and then dried in an oven at 60° C. to obtain modified carbon fibers.

[0058] The scanning electron microscope image of the modified carbon fiber is as follows Figure 4 shown, with figure 1 In contrast, there is a certain groove structure on the surfa...

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Abstract

The invention provides a method for performing surface modification treatment to carbon fiber through electrochemical polymerization. The method comprises the following steps: with the carbon fiber asan anode and a graphite plate as a cathode, adding graphene oxide and a polymeric monomer, which is selected from diacetone acrylamide, acrylic acid and phenol, into an electrolyte solution, performing an electrochemical polymerization reaction on the surface of the carbon fiber under the action of current, then taking out the carbon fiber, washing, and then drying. By the method, with the graphene oxide as a bonding point between the monomer and the carbon fiber, monomer polymerization is performed on the surface of the carbon fiber to form a three-dimensional grid structure so as to changethe surface state of the carbon fiber, so that when the carbon fiber and resin and other substrates are compounded to prepare the carbon fiber composite material, the anchoring points between the carbon fiber and the substrate can be increased, adhesion between the carbon fiber and the substrate is improved and the mechanical properties of the composite material are enhanced.

Description

technical field [0001] The invention relates to the technical field of carbon fiber surface treatment, in particular to a method for electrochemically polymerizing and modifying surface treatment of carbon fibers and a carbon fiber composite material. Background technique [0002] As one of the new advanced materials, carbon fiber has high specific strength, high specific modulus, high temperature thermal stability under anaerobic conditions, and low thermal expansion rate. Due to its anisotropy, it has extremely high tensile strength along the fiber axis. Tensile strength and Young's modulus, and because the density of carbon fiber is very small, the specific strength and specific modulus are very high. [0003] Carbon fiber can be combined with many matrix materials to prepare composite materials, the most common ones are resin, carbon, ceramics, and it can also be combined with metal, wood, etc. Carbon fiber resin-based composite materials are typical advanced new materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M14/36C08L63/00C08K9/04C08K7/06
CPCC08K7/06C08K9/08D06M14/36C08L63/00
Inventor 张永刚文章苹王雪飞钱鑫李德宏王微霞王欣宇
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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