Electrochemical modification treatment method of carbon fiber surface

A treatment method, carbon fiber electrode technology, applied in fiber treatment, physical treatment, anodic oxidation, etc., can solve the problems that the deposition process is difficult to control, difficult to realize industrialization, etc., and achieve mild treatment conditions, simple operation, and controllable graft density Effect

Inactive Publication Date: 2012-06-20
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires that the carbon fiber surface must be sized with epoxy resin to achieve carbon nanotube deposition, and the deposition process is difficult to control (for example, it is difficult to effectively avoid uneven deposition due to spatial position effects), and it is also difficult to realize industrialization.

Method used

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  • Electrochemical modification treatment method of carbon fiber surface
  • Electrochemical modification treatment method of carbon fiber surface
  • Electrochemical modification treatment method of carbon fiber surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Reflux the multi-walled carbon nanotubes with aqua regia (concentrated nitric acid: concentrated sulfuric acid=1:3) for 9-10 hours, centrifuge for 15 minutes, discard the upper solution part, wash the precipitate with deionized water, and then centrifuge for 15 minutes, repeat the process Step 3 times. Dry in an oven at 60°C for 12 hours. Then weigh 0.1 mg of the above-mentioned carboxylated carbon nanotubes and dissolve them in 10 mL of acetonitrile solution, disperse them evenly with ultrasonic waves, and prepare a 0.01 mg / mL electrolyte solution.

[0026] Take polyacrylonitrile carbon fiber and wind it on the tetrafluoroethylene plate as the anode electrode of the electrochemical workstation. figure 1 is a scanning electron microscope image of polyacrylonitrile carbon fiber. In the electrolyte solution, the platinum electrode was used as the cathode electrode, the temperature of the solution was controlled at 25°C, and a constant voltage of 1.0V was applied to the ...

Embodiment 2

[0028] Carboxylation-modified multi-walled carbon nanotubes were prepared according to the method shown in Example 1, and dried in an oven at 80° C. for 6 hours. Weigh 100 mg of the above-mentioned carboxylated carbon nanotubes and disperse them in 10 ml of tetrahydrofuran solution, uniformly disperse them with ultrasonic waves, and prepare a 10 mg / mL electrolyte solution.

[0029] Take polyacrylonitrile carbon fiber and wind it on a tetrafluoroethylene plate as the anode of the electrochemical workstation, the platinum wire as the cathode, and the Ag / AgCl electrode as the reference electrode. The carbon fibers were immersed in the electrolyte solution at a temperature of 25 ° C, and a voltage of 5 V was applied to electrolyze for 30 minutes through a CHI660A electrochemical workstation, and ultrasonic waves were applied during the process to disperse. Then the carbon fiber was taken out, cleaned by ultrasonic wave for 30 minutes, and then dried at 120° C. for 4 hours to obtai...

Embodiment 3

[0031] Single-walled carbon nanotubes were taken, and carboxylated-modified single-walled carbon nanotubes were prepared by the method shown in Example 1, and dried in a drying oven at 80° C. for 6 hours. Weigh 50 mg of the dried carboxylated carbon nanotubes and dissolve them in 10 mL of ethanol to prepare a 5 mg / mL electrolyte solution.

[0032] The polyacrylonitrile carbon fiber was wound on the tetrafluoroethylene plate as the anode of the electrochemical workstation, the platinum wire was used as the counter electrode, and the Ag / AgCl electrode was used as the reference electrode. The carbon fiber is immersed in the electrolyte solution, the pH of the solution is controlled at 10.0 and the temperature is 25 ° C, and the carbon fiber electrode is treated with a constant current of 10 mA for 30 minutes through the Autolab electrochemical workstation, and ultrasonic waves are applied during the process for effective dispersion. Then the carbon fibers were taken out, cleaned ...

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Abstract

The invention relates to an electrochemical modification treatment method of carbon fiber surface. The electrochemical modification treatment method comprises the steps of: modifying carbon nanotubes by adopting a nitric acid and sulfuric acid chemical oxidization method or an electrochemical method; dissolving modified carbon nanotubes in ethanol, acetonitrile, dimethyl formamide, dimethyl sulfoxide, tetrahydrofuran, protoporphyrin disodium, carbon tetrachloride, petroleum ether, acetone, chloroform or water, and carrying out ultrasonic treatment or stirring to form uniformly dispersed emulsion or suspension so as to prepare an electrolyte solution containing 0.01-10 mg/mL of carbon nanotubes; and applying voltage or current on a carbon fiber electrode in the electrolyte solution containing the carbon nanotubes with carbon fiber as an anode electrode and a conductive metal or graphite material as a cathode electrode while controlling the temperature of the electrolyte solution at 20-80 DEG C, then cleaning and drying. The electrochemical modification treatment method provided by the invention has the advantages of being simple, practical and capable of being industrialized.

Description

technical field [0001] The invention belongs to the field of surface treatment of carbon fibers, and in particular relates to an electrochemical modification treatment method of carbon fibers. Background technique [0002] Since Iijima reported the discovery of carbon nanotubes in 1991, carbon nanotubes have been a research hotspot in the field of nanofunctional materials. Carbon nanotubes have broad application prospects in many fields because of their unique structure, electrical, optical, magnetic and mechanical properties. At present, the combination of carbon nanotubes and traditional carbon fiber materials can not only maintain the excellent mechanical properties of traditional carbon fibers, but also endow them with new mechanical, optical, electrical and other properties, which has become a hot research topic at home and abroad. Zhao Jianguo and others reported the method of growing carbon nanotubes on the surface of carbon fibers by using thermal vapor growth ("Gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/06C25D11/02
Inventor 吕春祥吴刚平李登华安锋郭金海
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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