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Method of surface modification for environmentally-friendly carbon fibers

A carbon fiber filament and surface modification technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of easy clogging of natural fillers, insufficient strength and toughness, chemical reactions, etc. problems, to achieve enhanced bio-affinity, increased film-hanging rate and film-hanging rate, and good results

Active Publication Date: 2013-04-24
武汉环天禹生物环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural packing is easy to clog and react chemically, forming secondary pollution
Most artificial fillers have poor biocompatibility, insufficient strength and toughness, no corrosion resistance, no high temperature resistance, low adsorption performance, and cannot be used for a long time

Method used

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  • Method of surface modification for environmentally-friendly carbon fibers
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  • Method of surface modification for environmentally-friendly carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Soak the PAN-based carbon fiber precursor in acetone solution with a mass fraction of 95% for 2 hours, take it out and dry it; then soak it in nitric acid with a mass fraction of 65% for 4 hours, take it out, and dry it at a temperature of 120°C Dry to obtain preliminary modified carbon fiber filaments.

[0036] 2) Put the preliminarily modified carbon fiber filament into the tube atmosphere furnace, and pass CO 2 , to control CO 2 The flow rate was kept at 500mL / min. After the temperature was raised to 850°C, the heating was stopped, and it was naturally cooled to room temperature and taken out to obtain modified carbon fiber filaments.

[0037] 3) Comparative test

[0038] The non-modified carbon fiber filaments and the modified carbon fiber filaments were subjected to a film-hanging comparison experiment, and the film-hanging situation was observed after the comparison test was carried out for 6 days.

[0039] Such as image 3 The comparison chart of the 6-day...

Embodiment 2

[0046] 1) Soak the PAN-based carbon fiber precursor in an acetone solution with a mass fraction of 96% for 2 hours, take it out and dry it; then soak it in 65% nitric acid for 4 hours, take it out, and bake it at 100°C Dry to obtain preliminary modified carbon fiber filaments.

[0047] 2) Put the preliminarily modified carbon fiber filaments into a high-temperature and high-pressure furnace, use water vapor as the activation gas, adjust the pressure to 126Mpa and keep it for 3 hours, take it out and dry it at 150°C to obtain modified carbon fiber filaments.

[0048] 3) Film-hanging experiment: The obtained modified carbon fiber filaments were subjected to a film-hanging experiment in the natural lake water of East Lake, and the film-hanging situation was observed after 3 days;

[0049] Figure 6 Shown is the picture of the hanging film of the modified carbon fiber filaments made under natural water bodies;

[0050] Figure 7 A microscopic view of a modified carbon fiber fil...

Embodiment 3

[0054]1) Soak the PAN-based carbon fiber precursor in an acetone solution with a mass fraction of 97% for 4 hours, take it out to dry; Dry to obtain preliminary modified carbon fiber filaments.

[0055] 2) Put the preliminarily modified carbon fiber filament into the tube atmosphere furnace, and pass N 2 , control N 2 The flow rate was kept at 300mL / min. After the temperature was raised to 800°C, the heating was stopped, and it was naturally cooled to room temperature and taken out to obtain modified carbon fiber filaments.

[0056]

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Abstract

The invention relates to a method of surface modification for environmentally-friendly carbon fibers. The method comprises sequentially immersing carbon fiber protofilament with acetone and nitric acid, and activating in an atmosphere of active gas. The modified carbon fiber obtained by the method is increased in surface oxygen-containing functional groups, improved in biocompatibility, greatly improved in biofilm formation amount and biofilm formation rate, and thus is an excellent biological carrier, and can not only directly purify water quality of rivers and lakes, but also be applied in industrial wastewater treatment and purification of raw water. The modification method of the carbon fiber is simple, environmentally friendly and wide in application prospects, can be used for directly purifying the water quality of the rivers and the lakes, and has important significance for lake eutrophication control, waste water purification, drinking-water safety, cultivation of algae as raw materials of bioenergy, and self restoration of water ecosystem.

Description

technical field [0001] The invention relates to inorganic non-metallic material science and environmental science, in particular to a method for modifying the surface of environmentally friendly carbon fiber filaments. Background technique [0002] The eutrophication control technology of rivers and lakes mainly adopts physical methods (such as diverting rivers to lakes, dredging, physical precipitation, adsorption, filtration, etc.), chemical methods (such as flocculants, algaecides, disinfectants, etc.), biological methods (such as Biological agent, biofilm method, activated sludge method, etc.), ecological restoration method (such as oxidation pond, floating island, wetland, biological manipulation control, epiphytic algae control, etc.). Chemical methods are prone to toxic and side effects, and a single physical and biological treatment method cannot fundamentally solve the problem, and may cause secondary pollution and damage to the ecosystem. [0003] Therefore, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/34C02F3/32
Inventor 李兰涂立华杨梦斐孟洁
Owner 武汉环天禹生物环保科技有限公司
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