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Method for preparing active carbon fibers from cellulose

A technology of activated carbon fiber and cellulose, which is applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of single utilization route and low added value, and achieve the effects of diverse acquisition routes, improved comprehensive utilization rate, and wide range of material sources.

Inactive Publication Date: 2016-01-06
BEIJING KUNLUN JIANGHAI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has the characteristics of low added value and single utilization method

Method used

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  • Method for preparing active carbon fibers from cellulose

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Effect test

Embodiment 1

[0033] The preparation of embodiment 1 cellulose-based activated carbon fibers

[0034] Get a certain amount of cellulose powder (particle size: 120 mesh) and put it into the liquefaction device. Add phenol 4 times the weight of cellulose powder and sulfuric acid 0.1 times the weight of cellulose powder, mix and heat to 140°C, and keep it warm for 90 minutes to prepare cellulose liquefied resin; while heating, stir appropriately. After the liquefied product is cooled to room temperature, it is put into a spinning machine. When heated to 120°C, melt-spinning (spinning) is carried out at a speed of 100 rpm of the take-up roll to obtain initial fibers. Place the initial fiber in a blast drying oven, heat it to 120°C at a rate of 5°C / min, keep it warm for 2 hours, and take it out after cooling down to room temperature to obtain a carbon fiber precursor; weigh 15.30g of the precursor and place it in an activation device. Under the protection of nitrogen, heat up to 600°C at a rat...

Embodiment 2

[0036] The preparation of embodiment 2 cellulose-based activated carbon fibers

[0037] Get a certain amount of cellulose powder (80 mesh particle size) and put it into the liquefaction device. Add phenol 3 times the weight of cellulose powder and sulfuric acid 0.1 times the weight of cellulose powder, mix and heat to 120°C, and keep it warm for 90 minutes to prepare cellulose liquefied resin; while heating, stir appropriately. After the liquefied product is cooled to room temperature, it is put into a spinning machine. When heated to 120°C, melt spinning (spinning) is carried out at a speed of 80 r / min of the take-up roll to obtain initial fibers. Place the initial fiber in a blast drying oven, heat it to 140°C at a rate of 5°C / min, keep it warm for 2 hours, and take it out after cooling down to room temperature to obtain a carbon fiber precursor; weigh 10.20g of the precursor and place it in an activation device. Under the protection of nitrogen, heat up to 600°C at a rate...

Embodiment 3

[0039] The preparation of embodiment 3 cellulose-based activated carbon fibers

[0040]Get a certain amount of cellulose powder (60 mesh particle size) and put it into the liquefaction device. Add phenol 6 times the weight of cellulose powder and sulfuric acid 0.1 times the weight of cellulose powder, mix and heat to 120°C, and keep it warm for 90 minutes to prepare cellulose liquefied resin; while heating, stir appropriately. After the liquefied product is cooled to room temperature, it is put into a spinning machine. When heated to 120°C, melt-spinning (spinning) is carried out at a speed of 100 rpm of the take-up roll to obtain initial fibers. Place the initial fiber in a blast drying oven, heat it to 140°C at a rate of 5°C / min, keep it warm for 2 hours, and take it out after cooling down to room temperature to obtain a carbon fiber precursor; weigh 10.20g of the precursor and place it in an activation device. Under the protection of nitrogen, heat up to 600°C at a rate o...

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Abstract

The invention provides a method for preparing active carbon fibers from cellulose. The method comprises putting cellulose acetate into a liquid reactor, adding phenol and an acidic catalyst into the reactor to obtain cellulose-phenol resin, adding a certain amount of acetone as a solvent into the resin to obtain a spinning liquid, carrying out melt spinning by the spinning liquid, carrying out thermocuring under a certain condition to obtain cellulose protofilaments, putting the cellulose protofilaments into a carbonization and activation device, and carrying out carbonization and activation to obtain cellulose-based active carbon fibers. The lignocellulose raw material is a regenerative resource with large quantity of resources. Compared with the existing active carbon fiber product, the active carbon fiber provided by the invention has the characteristics of wide raw material sources and various raw material acquisition approaches. Cellulose does not contain other impurities and has high liquefaction reaction efficiency, and the liquefaction product can be directly spun to form active carbon fiber protofilaments without filtration so that a production cost is reduced and wood biomass comprehensive utilization ratio and added value are improved.

Description

technical field [0001] The invention relates to a method for preparing activated carbon fibers, in particular to a method for obtaining activated carbon fibers by utilizing cellulose originally extracted from woody biomass through a physical activation method of water vapor. Background technique [0002] Activated carbon fiber (activated carbon fiber, ACF) is a kind of porous fiber adsorption material with better performance than activated carbon, and has high adsorption performance. The carbon content in the chemical composition of carbon fiber is more than 90%, and it is widely used in production fields such as environmental protection, medicine and hygiene, and component separation. [0003] At present, the raw materials of carbon fiber materials in the world are mainly fossil resources such as polyacrylonitrile (PAN), petroleum refining residue pitch and coal tar. In order to reduce the dependence on fossil resources, it is particularly important to use biomass raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16
Inventor 李海涛张文博陆薇
Owner BEIJING KUNLUN JIANGHAI TECH DEV CO LTD
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