Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for preparing carbon nanofiber airgel from plant fibers

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: 2022-03-22
GUANGDONG UNIV OF TECH
View PDF6 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing carbon nanofiber airgel from plant fibers
  • A method for preparing carbon nanofiber airgel from plant fibers
  • A method for preparing carbon nanofiber airgel from plant fibers

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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing carbon nanofiber airgel from plant fibers, comprising: a. pre-treating plant fiber raw materials to obtain fiber coarse powder; b. dispersing the fiber coarse powder in lye for heat treatment, Then bleach with bleaching agent, wash with suction, repeat steps 1-3 times to obtain a cellulose filter cake; c, disperse the cellulose filter cake in water, centrifuge, and get its supernatant to obtain a nanocellulose solution; d, Rotary steaming to a viscous shape, ultrasonication to make it uniformly dispersed; e, freeze-drying to obtain nano-cellulose airgel; f, pyrolysis of nano-cellulose airgel in an inert gas atmosphere to obtain the final product. The present invention adopts plant fiber as raw material to prepare carbon nanofiber airgel, and only uses lye for simple treatment, saves acidification and solvent replacement steps, uses less solvent, is environmentally friendly and pollution-free, and has short preparation time and low cost. The prepared carbon nanofiber airgel has the advantages of low density and large specific surface area.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com