Method for preparing carbon aerogel by using waste seaweed residues as raw material

A carbon aerogel, seaweed residue technology, applied in aerogel preparation, carbon preparation/purification, chemical instruments and methods, etc., can solve problems such as waste of natural resources, marine fishery economy and ecological damage, and achieve the preparation cycle Short, solve the limited application scope, the effect of environmental protection and safety in the production process

Inactive Publication Date: 2020-04-10
DALIAN OCEAN UNIV
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of seaweed residue rich in organic matter and nutrient salts is discharged, which not only wastes a large amount of natural resources, but also becomes a potential factor inducing water eutrophication and red tide, bringing damage and impact to marine fishery economy and ecology

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
  • Method for preparing carbon aerogel by using waste seaweed residues as raw material
  • Method for preparing carbon aerogel by using waste seaweed residues as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Follow the steps below in turn:

[0015] a. Wash the waste seaweed residue with deionized water to remove the sediment, soak it in excess ethanol for 24 hours, remove the upper layer of scum, filter it, dry it in a vacuum constant temperature drying oven at 100°C for 20 hours, and then crush it , sieve to obtain seaweed residue particles, add excess sodium hypochlorite, stir at 60°C for 5 hours, cool to room temperature, filter and remove the supernatant, add 0.5mol / L sodium hydroxide solution to the precipitate, stir well and centrifuge to take the precipitate , then add 1mol / L dilute hydrochloric acid and boil for 5 minutes, wash repeatedly with deionized water until neutral, centrifuge and place in a drying oven to dry to obtain seaweed cellulose;

[0016] b. Put seaweed cellulose in urea / sodium hydroxide mixed aqueous solution, the mass concentration of seaweed cellulose is 5%, ultrasonically disperse at room temperature for 45 minutes, the mass ratio of urea to sod...

Embodiment 2

[0021] Follow the steps below in turn:

[0022] a. Wash the waste seaweed slag with deionized water to remove the sediment, soak it in excess ethanol for 24 hours, remove the upper layer of scum, filter it, dry it in a vacuum constant temperature drying oven at 100°C for 12 hours, and then crush it , sieve to obtain seaweed residue particles, add excess sodium hypochlorite, stir at 60°C for 5 hours, cool to room temperature, filter and remove the supernatant, add 0.5mol / L sodium hydroxide solution to the precipitate, stir well and centrifuge to take the precipitate , then add 1mol / L dilute hydrochloric acid and boil for 5 minutes, wash repeatedly with deionized water until neutral, centrifuge and place in a drying oven to dry to obtain seaweed cellulose;

[0023] b. Put seaweed cellulose in urea / sodium hydroxide mixed aqueous solution, the mass concentration of seaweed cellulose is 3%, ultrasonically disperse at room temperature for 30 minutes, the mass ratio of urea to sodium...

Embodiment 3

[0028] Follow the steps below in turn:

[0029] a. Wash the waste seaweed slag with deionized water to remove the sediment, soak it in excess ethanol for 24 hours, remove the scum in the upper layer, filter it, dry it in a vacuum constant temperature drying oven at 100°C for 24 hours, and then crush it , sieve to obtain seaweed residue particles, add excess sodium hypochlorite, stir at 60°C for 5 hours, cool to room temperature, filter and remove the supernatant, add 0.5mol / L sodium hydroxide solution to the precipitate, stir well and centrifuge to take the precipitate , then add 1mol / L dilute hydrochloric acid and boil for 5 minutes, wash repeatedly with deionized water until neutral, centrifuge and place in a drying oven to dry to obtain seaweed cellulose;

[0030] b. Put seaweed cellulose in urea / sodium hydroxide mixed aqueous solution, the mass concentration of seaweed cellulose is 8%, ultrasonically disperse at room temperature for 60 minutes, the mass ratio of urea to so...

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
densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing carbon aerogel by using waste seaweed residues as a raw material, which comprises the following steps: separating and purifying industrial waste seaweedresidues to obtain seaweed cellulose, and carrying out sol-gel, vacuum freeze drying and high-temperature carbonization processes to finally obtain the carbon aerogel with a controllable structure. The carbon aerogel does not contain substances harmful to organisms or polluting the environment, so that the problems of high raw material cost and limited application range of the existing carbon aerogel are solved, and the problem of high-added-value development and utilization of the waste seaweed residues is also solved. The method is simple to operate and short in preparation period, the material structure is controllable, the production process is environment-friendly and safe, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing carbon airgel, in particular to a method for preparing carbon airgel by using waste seaweed residue as a raw material. Background technique [0002] Carbon airgel is a nano-scale carbon material with a three-dimensional network structure, which has a large specific surface area, many voids, low density and good conductivity, so it is particularly prominent in electrode materials for energy storage devices [Biener J, Stadermann M, SussM, et al. Advanced carbon aerogels for energy applications[J]. Energy & Environmental Science, 2011, 4(3): 656-667.]. Liu et al[Yang X, Kong L, Ma J, et al. Facile construction of hierarchically porous carbon nanofiber aerogel for high-performance supercapacitor[J]. Journal of Applied Electrochemistry,2019, 49(3): 241-250.] Aerogels are used as electrode materials for supercapacitors. The results show that carbon aerogels have excellent electrochemical performance, and the s...

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 Applications(China)
IPC IPC(8): C01B32/05B01J13/00
CPCC01B32/05B01J13/0091
Inventor 潘超孙宏宇汪静
Owner DALIAN OCEAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap