Method for preparing carbon nanofiber aerogel from plant fiber

A carbon nanofiber and plant fiber technology, applied in the field of nanomaterials, can solve the problems of unfavorable carbon nanofiber airgel industrialization process, high preparation cost, toxic reagents, etc., and achieve simple and easy preparation process, short preparation time, solvent little effect

Active Publication Date: 2019-04-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation cost of this method is high, and the reagents used are toxic and have certain risks to the environment, which is not conducive to the industrialization process of carbon nanofiber airgel.

Method used

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  • Method for preparing carbon nanofiber aerogel from plant fiber
  • Method for preparing carbon nanofiber aerogel from plant fiber
  • Method for preparing carbon nanofiber aerogel from plant fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Repeatedly wash a certain amount of bagasse with deionized water for 3 times, put it in an oven at 80°C, and dry it for 12 hours; crush the dried bagasse by a pulverizer, and pass through a 80-mesh sieve to obtain bagasse powder;

[0034] (2) Take 10g of 80-mesh bagasse powder and disperse it in 100ml of sodium hydroxide solution with a mass concentration of 10%, pour the mixture into a 250ml Teflon sealed tank, and put it in an oil bath at 100°C. After magnetic stirring for 1h, cool naturally; then the cooled mixed solution is suction filtered and washed 3 times to obtain bagasse pulp; then the bagasse pulp is put into a 250ml Erlenmeyer flask, and 20ml of mass concentration is added to bleach with hydrogen peroxide of 30%. to 70°C, magnetically stirred for 2 hours, cooled naturally, filtered and washed 3 times, put the bagasse obtained by suction filtration into an Erlenmeyer flask, added 100ml of sodium hydroxide solution with a mass concentration of 5%, heated in...

Embodiment 2

[0041](1) Repeatedly wash a certain amount of bagasse with deionized water for 3 times, put it in an oven at 100°C, and dry it for 10 hours; crush the dried bagasse by a pulverizer, and pass through a 80-mesh sieve to obtain bagasse powder;

[0042] (2) Take 10g of 80-mesh bagasse powder and disperse it in 100ml of sodium hydroxide solution with a mass concentration of 12%, pour the mixture into a 250ml Teflon sealed tank, and put it in an oil bath at 95°C. After magnetic stirring for 2h, cool naturally; then the cooled mixed solution is suction filtered and washed 3 times to obtain bagasse pulp; then the bagasse pulp is put into a 250ml Erlenmeyer flask, and 20ml of mass concentration is added to bleach with hydrogen peroxide of 25%. to 75°C, magnetically stirred for 1 hour, cooled naturally, filtered and washed 3 times, put the bagasse obtained by suction into a conical flask, added 100ml of sodium hydroxide solution with a mass concentration of 6%, heated in an oil bath at 8...

Embodiment 3

[0050] (1) Wash a certain amount of wood with deionized water repeatedly for 3 times, put it in an oven at 90°C, and dry it for 11 hours; pulverize the dried wood with a grinder, and pass it through an 80-mesh sieve to obtain wood powder;

[0051] (2) Take 10g of 80-mesh wood flour and disperse it in 120ml of sodium hydroxide solution with a mass concentration of 8%, pour the mixture into a 250ml Teflon sealed tank, and put it in an oil bath at 110°C. After magnetic stirring for 1h, cool naturally; then the cooled mixed solution is suction filtered and washed 3 times; then the filter cake obtained by suction filtration is put into a 250ml Erlenmeyer flask, and 20ml of mass concentration is added to bleach with hydrogen peroxide of 30%. to 65°C, magnetically stirred for 1 hour, cooled naturally, filtered and washed 3 times, put the filter cake obtained by suction filtration into a conical flask, added 80ml of sodium hydroxide solution with a mass concentration of 4%, and heated ...

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Abstract

The invention discloses a method for preparing a carbon nanofiber aerogel from plant fiber. The method for preparing the carbon nanofiber aerogel from the plant fiber comprises, a, preprocessing plantfiber materials to obtain coarse fiber powder; b, dispersing the coarse fiber powder in alkaline liquor for thermal treatment, bleaching the treated coarse fiber powder with bleaching agent, performing suction filtration and washing for 1-3 times to obtain a cellulose filter cake; c, dispersing the cellulose filter cake in water, performing centrifugal treatment and extracting supernatant to obtain a nano-cellulose solution; d, rotarily evaporating the nano-cellulose solution to a gel shape, and performing ultrasonic treatment for uniform dispersion; e, performing freeze-drying to obtain a nano-cellulose aerogel; f, pyrolyzing the nano-cellulose aerogel in an inert gas atmosphere to obtain the carbon nanofiber aerogel. The carbon nanofiber aerogel is prepared by taking the plant fiber asthe raw material; through simple treatment with the alkaline liquor, the processes of acidification and solvent replacement can be saved, consumption of solvent can be reduced, and green and environmental protection and no pollution can be achieve; meanwhile, the method for preparing the carbon nanofiber aerogel from the plant fiber is short in preparation time and low in cost, and the prepared carbon nanofiber aerogel has the advantages of being low in density, large in specific surface area and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing carbon nanofiber airgel from plant fibers. Background technique [0002] Nanofibrous airgel is a new material that has received extensive attention because of its excellent physical properties such as extremely low density, large specific surface area, high electrical conductivity, and porosity. These properties make carbon aerogels widely used as catalyst supports, artificial muscles, electrodes for supercapacitors, absorbents, and gas detectors. [0003] Traditional resorcinol-formaldehyde carbon aerogels have disadvantages such as toxicity, high cost, and brittleness. In contrast, biochar aerogels have attracted extensive attention from researchers because of their renewable, sustainable, and environmentally friendly raw materials. The raw materials of biochar aerogels mainly include pure carbohydrates and lignocellulosic biomas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15B01J13/00
CPCB01J13/0091C01B32/15
Inventor 周超洪浩群郭权南陈琴
Owner GUANGDONG UNIV OF TECH
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