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Electrochemical CF (Carbon Fiber) surface modification method

A surface modification and electrochemical technology, applied in chemical instruments and methods, fiber treatment, anodic oxidation, etc., can solve the problem of poor microbial fixation effect and achieve the effect of improving microbial fixation performance

Inactive Publication Date: 2011-04-06
SICHUAN CITY TRACK TRAFFIC MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic carrier materials for film-hanging can be mainly divided into hard fillers, semi-soft fillers and soft fillers. Among them, the materials of soft and semi-soft fillers are mainly polymer materials such as polypropylene and polyethylene, but their impact on Poor fixation of microorganisms

Method used

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  • Electrochemical CF (Carbon Fiber) surface modification method
  • Electrochemical CF (Carbon Fiber) surface modification method
  • Electrochemical CF (Carbon Fiber) surface modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Remove the surface sizing agent from the high-strength polyacrylonitrile-based carbon fiber (PAN-CF, T300) at room temperature, rinse with distilled water and dry; then use CF as the anode, graphite as the cathode, platinum electrode as the auxiliary electrode, and saturated calomel The electrode is a reference electrode, and CF is anodized by chronoamperometry. 0.1-1mol / L nitric acid solution is used as the electrolyte, the applied voltage is 0.5-1.5V, the reaction temperature is 20-27°C, and the reaction time is 120-150s. The surface treatment results are as follows: the total amount of oxygen-containing functional groups on the surface is 40.84%, the equilibrium water content is 5.88%, and the biofilm fixation amount is 135%. Its SEM photos are as figure 2 shown.

Embodiment 2

[0018] Remove the surface sizing agent from the high-strength polyacrylonitrile-based carbon fiber (PAN-CF, T300) at room temperature, rinse with distilled water and dry; then use CF as the anode, graphite as the cathode, platinum electrode as the auxiliary electrode, and saturated calomel The electrode is a reference electrode, and the surface electropolymerization of CF is carried out by chronoamperometry. 0.1-0.5mol / L maleic anhydride is used as the elemental solution, the applied voltage is 1-2V, the reaction temperature is 25-30°C, and the reaction time is 100-130s. The surface treatment results are as follows: the total amount of oxygen-containing functional groups on the surface is 36.82%, the equilibrium moisture content is 5.69%, and the biofilm fixation amount is 212%. Its SEM photos are as image 3 shown.

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Abstract

The invention belongs to the fieldss of electrochemistry and fiber materials. In the invention, anodic oxidation treatment or surface electropolymerization treatment are carried out on CF by adopting a chronoamperometry method in an external electric field under an external voltage of 0.5-6 V at a reaction temperature of 20-35 DEG C for a reaction time of 5-150 s. In case of the anodic oxidation treatment, acid, alkali or ammonium salt is adopted as an electrolyte which has the concentration ranging from 0.1-5mol / L. In case of the surface electropolymerization treatment, maleic anhydride is adopted as an elemental solution which has the concentration of 0.1-2mol / L. In the invention, by modifying the CF surface through anodic oxidation or surface electropolymerization, the surface oxygen content and the roughness of the CF surface are improved so that the hydrophilicity and the microbial affinity of the CF surface are improved and the applications of the CF as a biofilm carrier to the sewage treatment field by using a biofilm method are facilitated.

Description

technical field [0001] The invention belongs to the field of electrochemistry and fiber materials, in particular to a method for surface modification of carbon fiber (CF), which is used to improve the biological affinity of CF. Background technique [0002] As a functional material, CF is widely used as a reinforcing material in resin-based composites, and its bonding strength with the resin matrix is ​​improved through surface treatment processes. In addition to the application in the field of engineering materials, CF is also widely used in the field of environmental protection, such as Liu Lang et al. Yuezhu, Wang Qingen. Research on treatment of high-concentration organic wastewater by activated carbon fiber [J]. Environmental Science and Technology, 1989, 9(5): 46-48) Treatment of organic wastewater by activated carbon fiber. [0003] In the field of sewage treatment, the preparation and optimization of biofilm carrier materials are key technologies in biofilm sewage t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/06D06M10/08D06M14/36C25D11/02C25B3/00C02F3/34
Inventor 戴光泽雷兵岑贞章陈小利包艳玲李美霞闫春江韩靖黄兴民赵君文
Owner SICHUAN CITY TRACK TRAFFIC MATERIAL
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