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Method for modifying composite surface of carbon fiber

A composite surface and carbon fiber technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve problems such as poor microbial fixation, improve microbial fixation performance, and The effect of development prospects

Inactive Publication Date: 2011-03-02
SICHUAN CITY TRACK TRAFFIC MATERIAL +1
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  • Description
  • Claims
  • Application Information

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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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  • Method for modifying composite surface of carbon fiber
  • Method for modifying composite surface of carbon fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Soak the high-strength polyacrylonitrile-based carbon fiber (PAN-CF, T300) in acetone to remove the surface epoxy resin sizing agent at room temperature, rinse with distilled water and dry; then immerse the CF with the sizing agent removed in concentrated nitric acid constant temperature boiling water Take it out after heating the bath for 0.5-2h, rinse it repeatedly with distilled water until the pH value of the cleaning solution is 7, and then dry it; finally, immerse the CF oxidized by nitric acid in a CaCl2 solution with a concentration of 0.1-0.3mol / L for 5-6h, take it out Then rinse with distilled water and dry.

[0015] The obtained CF test results after surface modification are as follows: the total amount of oxygen-containing functional groups on the surface is 24.13%, the equilibrium water content is 6.07%, and the biofilm fixation amount is 229.6%. Its LCM photo as figure 1 Shown in a.

Embodiment 2

[0017] Soak the high-strength polyacrylonitrile-based carbon fiber (PAN-CF, T300) in acetone to remove the surface epoxy resin sizing agent at room temperature, rinse with distilled water and dry; then immerse the CF with the sizing agent removed in concentrated nitric acid constant temperature boiling water Take it out after heating in the bath for 1-3 hours, rinse repeatedly with distilled water until the pH value of the cleaning solution is 7, and then dry; finally, immerse the CF oxidized by nitric acid in FeCl3 solution with a concentration of 0.1-0.3mol / L for 4-5 hours, take it out Then rinse with distilled water and dry.

[0018] The obtained CF test results after surface modification are as follows: the total amount of oxygen-containing functional groups on the surface is 20.85%, the equilibrium moisture content is 5.18%, and the biofilm fixation amount is 188.0%. Its LCM photo as figure 1 Shown in b.

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Abstract

The invention discloses a method for modifying the composite surface of a carbon fiber (CF), which relates to a double-surface processing method of the CF. The method comprises the following two steps: (1) carrying out nitric acid liquid-phase oxidization on the CF to improve the surface biocompatibility of the CF; and (2) immersing the oxidized CF in an iron chloride or calcium chloride solution to adsorb metal cations so as to improve the adhesion strength of microorganisms on the surface of the CF. The invention can effectively increase the adhesion quantity and the adhesion strength of microorganisms on the surface of the CF, thereby being beneficial to the CF as the biological film carrier used for sewage treatment based on a biological film method and other relevant fields.

Description

technical field [0001] The invention belongs to a method for surface modification of carbon fiber (CF), in particular to a double surface treatment of CF to improve the biological affinity of CF. Background technique [0002] In the field of sewage treatment, biofilm sewage treatment technology, as one of the efficient sewage treatment processes, has been widely used in the treatment of organic sewage such as domestic sewage. The choice of biofilm carrier in this technology directly affects the fixation of microorganisms on the carrier material and the formation of biofilm, and is one of the key factors for the efficient and stable operation of the biofilm wastewater treatment process. 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 The fixation ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
Inventor 戴光泽雷兵包艳玲闫春江牛正帅谢鹏李美霞韩靖黄兴民赵君文
Owner SICHUAN CITY TRACK TRAFFIC MATERIAL
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