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Method for making active carbon fibers of cotton stalk skins by using microwave method

A technology for activated carbon fiber and cotton stalk skin, which is applied in the chemical post-treatment of fibers, fiber treatment, fiber chemical characteristics, etc., can solve the problems of serious pollution and high energy consumption, and achieve the effects of simple preparation process, excellent performance and sufficient raw materials

Inactive Publication Date: 2011-09-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of high energy consumption and serious pollution existing in the existing activated carbon fiber preparation technology, the present invention provides a fast, simple and environment-friendly microwave method for preparing activated carbon fiber from cotton stalk skin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Wash the cotton stalks in advance to remove impurities, cut them into sections, move the cotton stalks to the incubator, keep the moisture content at 50%-60%, inoculate with white rot fungi, and keep the temperature at 28°C-33°C for fermentation treatment 3-5 days to remove non-cellulose substances, after washing again, dry at 100-120°C; immerse in a phosphoric acid solution with a mass concentration of 40%-50% at a mass ratio of 1:2.5 for 10 hours ; Place the soaked cotton stalk fiber in a microwave oven, carbonize and activate it at 700W for 10 minutes, turn off the power and cool it to room temperature to take it out; first wash it with tap water at 80°C-90°C and then with deionized water until the pH value 6-7, drying or drying naturally, the cotton stalk skin activated carbon fiber is obtained.

Embodiment 2

[0013] The fermentation stage is the same as described in Example 1; then, it is immersed in the KOH solution with a mass concentration of 20%-25% according to the mass ratio of 1:2, and soaked for 12 hours; the above-mentioned soaked cotton stalk skin is placed in a microwave oven, and 800W carbonization activation for 5 minutes, turn off the power, cool down to room temperature naturally and take it out; first wash with tap water at 80°C-90°C, then with deionized water to pH 6-7, dry or dry naturally to obtain cotton Stalk bark activated carbon fiber.

Embodiment 3

[0015] The fermentation stage is the same as described in Example 1; then, it is immersed in a NaOH solution with a mass concentration of 25% according to a mass ratio of 1:3, and soaked for 8 hours; the above-mentioned soaked cotton stalk skin is placed in a microwave oven and activated by carbonization at 750W After 15 minutes, turn off the power, cool down to room temperature naturally, and then take it out; first wash with tap water at 80°C-90°C, then deionized water to pH 6-7, dry or dry naturally, and then the cotton stalk skin activated carbon is obtained fiber.

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PUM

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Abstract

The invention discloses a method for making active carbon fibers of cotton stalk skins by using the microwave method, comprising the following steps of: (1) a biological treatment: washing cotton stalk skins and removing impurities, cutting the cotton stalk skins into segments, inoculating with white rot fungi to ferment, washing and drying; (2) a chemical treatment: dipping cotton stalk skin fibers processed from the Step (1) into a KOH, NaOH or H3PO4 solution; (3) placing the cotton stalk skin fibers dipped in Step (2) into a microwave oven for carbonization and activation, taking the carbonized and activated cotton stalk skin fibers out of the microwave oven after cooling to room temperature, washing the cotton stalk skin fibers to pH 6-7, kiln drying or air drying to produce the active carbon fibers of cotton stalk skins. The method for making active carbon fibers by using cotton stalk skins as the raw material in the invention has advantages of simple preparation technology, fast preparation speed, low energy consumption, sufficient raw material and low price. The active carbon fibers prepared by using the method have a high carbon content rate, well-developed pores, strong sorption and excellent performance, can effectively remove harmful pollutants, and is good for environmental protection.

Description

technical field [0001] The invention relates to a method for preparing activated carbon fibers from cotton stalks by using microwaves, and belongs to the technical field of activated carbon preparation. Background technique [0002] Activated carbon fiber is a new type of carbonaceous adsorbent material developed after powder activated carbon and granular activated carbon. It has large specific surface area, rich micropores, narrow pore size distribution, fast adsorption and desorption speed, strong regeneration ability, and large adsorption capacity. And good adsorption kinetics, so widely used in environmental protection, textile, chemical, electronics, medical, food, atomic energy and other industries. At present, the raw materials for preparing activated carbon fibers mainly include viscose silk, polypropylene nitrile-based fibers, pitch fibers and phenolic fibers. The preparation of activated carbon with these raw materials has the problems of high energy consumption an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16D01C1/00
Inventor 岳钦艳孙媛媛高宝玉黄理辉许醒姚付江
Owner SHANDONG UNIV
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