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Alkali-activated lignin-based active carbon fibers and preparation method thereof

An activated carbon fiber and lignin-based technology, which is applied in fiber treatment, fiber chemical characteristics, rayon chemical post-treatment, etc., can solve the problems of high production cost and sustainability of activated carbon fiber, and achieve waste utilization, use reduction, and cost reduction. small effect

Inactive Publication Date: 2017-05-31
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As early as the 1960s, Japan began research on activated carbon fibers, but so far, the raw materials for producing activated carbon fibers are mainly fossil materials. Production costs are getting higher and sustainability is being challenged. Today, when sustainable development is advocated, it is becoming more and more meaningful to use biomass materials to produce activated carbon fibers.

Method used

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  • Alkali-activated lignin-based active carbon fibers and preparation method thereof
  • Alkali-activated lignin-based active carbon fibers and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] A kind of preparation method of the lignin-based activated carbon fiber of alkali activation, described preparation method comprises the steps:

[0030] Preparation of lignin: Grind corn stalks from enzymatic hydrolysis, cook with sodium hydroxide, filter, add the filtrate to 10 times its volume of deionized water, adjust the pH value to 1 with hydrochloric acid, let stand overnight, lignin is precipitated Finally, centrifuge at 2000r / min for 30min, and dry at 60°C for 24h to obtain lignin;

[0031] Preparation of spinning solution: Add polyethylene oxide to N,N-dimethylformamide, stir and dissolve at 60°C, then add lignin, stir and dissolve at 30°C to obtain spinning solution, the polyethylene oxide, N , the weight ratio of N-dimethylformamide to lignin is 1:19:80;

[0032] High-voltage electrospinning: Add the spinning liquid into the syringe, the distance between the needle of the syringe and the drum is 20cm, the needle of the syringe is connected to a positive hig...

Embodiment 2

[0036] A kind of preparation method of the lignin-based activated carbon fiber of alkali activation, described preparation method comprises the steps:

[0037] Preparation of lignin: Grind corn stalks, cook with sulfate method, filter, add the filtrate to 10 times its volume of deionized water, adjust the pH value to 2 with hydrochloric acid, let it stand overnight, after the lignin is precipitated, 3000r / Centrifuge for 40 minutes, dry at 80°C for 20 hours to obtain lignin;

[0038] Preparation of spinning solution: Add polyvinyl nitrile to N,N-dimethylformamide, stir and dissolve at 60°C, then add lignin, stir and dissolve at 30°C to obtain spinning solution, the polyvinyl nitrile, N , the weight ratio of N-dimethylformamide to lignin is 0.6:19.4:60;

[0039] High-voltage electrospinning: Add the spinning liquid into the syringe, the distance between the needle of the syringe and the drum is 10cm, the needle of the syringe is connected to a positive high-voltage power suppl...

Embodiment 3

[0043] A kind of preparation method of the lignin-based activated carbon fiber of alkali activation, described preparation method comprises the steps:

[0044] Preparation of lignin: Grind wheat straw, cook with alkali ethanol method, filter, add the filtrate to 10 times its volume of deionized water, adjust the pH value to 3 with hydrochloric acid, let stand overnight, after lignin is precipitated, 4500r / min Centrifuge for 10 minutes and dry at 40°C for 36 hours to obtain lignin;

[0045] Preparation of spinning solution: Add polyethylene oxide to N,N-dimethylformamide, stir and dissolve at 60°C, then add lignin, stir and dissolve at 30°C to obtain spinning solution, the polyethylene oxide, N , the weight ratio of N-dimethylformamide to lignin is 0.2:19.8:46.7;

[0046] High-voltage electrospinning: Add the spinning liquid into the syringe, the distance between the needle of the syringe and the drum is 25cm, the needle of the syringe is connected to a positive high-voltage p...

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Abstract

The invention relates to alkali-activated lignin-based active carbon fibers and a preparation method thereof, and belongs to the field of active carbon fiber materials. The preparation method comprises the following steps of a step of preparing lignin; a step of preparing spinning solution; a step of carrying out high-voltage electrostatic spinning; a step of carrying out carbonization; and a step of carrying out alkali activation. The alkali-activated lignin-based active carbon fibers prepared by the preparation method disclosed by the invention can replace application of polyacrylonitrile-based carbon fibers and activated carbon to adsorption.

Description

technical field [0001] The invention relates to an alkali-activated lignin-based activated carbon fiber and a preparation method thereof, belonging to the field of activated carbon fiber materials. Background technique [0002] Activated carbon fiber is a linear and porous material, which has the advantages of large specific surface area, short adsorption path, fast adsorption rate, good thermal stability and good chemical stability, etc. It can be widely used in water purification, air purification, catalyst carrier , electrode materials and filtration systems. As early as the 1960s, Japan began research on activated carbon fibers, but so far, the raw materials for the production of activated carbon fibers are mainly fossil materials. Production costs are getting higher and sustainability is being challenged. Today, when sustainable development is advocated, it is becoming more and more meaningful to use biomass materials to produce activated carbon fibers. [0003] Ligni...

Claims

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Application Information

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IPC IPC(8): D01F9/17D01F11/12D01D5/00
CPCD01F9/17D01D5/0069D01D5/0076D01D5/0092D01F11/12
Inventor 周景辉王兴唐彪戴忠郭延柱孙广卫
Owner DALIAN POLYTECHNIC UNIVERSITY
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