Three-dimensional fiber-based composite aerogel type adsorbent preparation method

A composite aerogel, fiber-based technology, used in chemical instruments and methods, adsorbed water/sewage treatment, alkali metal compounds, etc. The process is complicated and complicated, so as to achieve the effect of lasting maintenance of internal pore structure, lasting recycling, and wide source of raw materials

Inactive Publication Date: 2019-07-23
GUANGXI UNIVERSITY OF TECHNOLOGY
View PDF9 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN201610605988.3 "Modified Chitosan / Nanocellulose Composite Airgel and Its Preparation Method and Application" uses modified chitosan and nanocellulose composite, and N,N'-methylenebispropylene The modified chitosan / nanocellulose composite airgel was prepared with amide as a crosslinking agent. The preparation process of nanocellulose used in this patent is complicated, time-consuming and costly
Chinese patent CN201811032482.3 "A nano-cellulose cross-linked graphene / chitosan airgel and its preparation method and application" uses dialdehyde nano-cellulose, amine-modified graphene oxide and chitosan cross-linking Composite with nanocellulose cross-linked graphene / chitosan airgel, the preparation process of nanocellulose and graphene oxide used in this patent is complicated and costly
In the current literature, airgel-type adsorbents are mostly made of solutions or granular suspensions, which have the defects of high brittleness, insufficient strength and poor pore connectivity, which is not conducive to adsorption recovery operations and recycling of adsorbents.

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
  • Three-dimensional fiber-based composite aerogel type adsorbent preparation method
  • Three-dimensional fiber-based composite aerogel type adsorbent preparation method
  • Three-dimensional fiber-based composite aerogel type adsorbent preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, cut 3g of cotton fiber into 1-5mm, and selectively oxidize it with sodium periodate. The mass-volume concentration of sodium periodate solution is 8g / L, the temperature is 45°C, the bath ratio is 1:40, and the reaction is protected from light. After 4 hours, the fibers were filtered out after the reaction, washed and vacuum-dried to obtain 2.88 g of dialdehyde-based cotton fibers. Then the dialdehyde-based cotton fiber was placed in 100 mL of urea / dimethylformamide solution, wherein the urea content was 15 g, and mechanically stirred at room temperature for 1 h to form a homogeneous suspension. Dissolve 10g of metaphosphoric acid in 60mL of deionized water, keep stirring for 2h, then mix with the above-mentioned dialdehyde-based cotton fiber suspension, react at 120°C for 2h, filter out the fiber, centrifuge and wash the fiber with ethanol and deionized water Samples were dried under vacuum at 60°C to obtain modified cotton fibers. 5 g of chitosan powder with a ...

Embodiment 2

[0027] First cut 2g of bamboo pulp fibers into 3-5mm, and selectively oxidize it with sodium periodate, the mass-volume concentration of sodium periodate solution is 5g / L, the temperature is 40°C, the bath ratio is 1:30, and it is protected from light After 2 hours of reaction, the fibers were filtered out after the reaction, washed and vacuum-dried to obtain 1.82 g of dialdehyde-based bamboo pulp fibers. Then the above-mentioned dialdehyde-based bamboo pulp fiber was placed in 80 mL of urea / dimethylformamide solution, wherein the urea content was 10 g, and mechanically stirred at room temperature for 1 h to form a homogeneous suspension. Dissolve 6 g of metaphosphoric acid in 40 mL of deionized water, keep stirring for 2 h, then mix it with the above dialdehyde-based bamboo pulp fiber suspension, react at 100°C for 2 h, filter out the fibers, centrifuge and wash with ethanol and deionized water Fiber samples were dried under vacuum at 60°C to obtain modified bamboo pulp fiber...

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
quality scoreaaaaaaaaaa
porosityaaaaaaaaaa
porosityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a three-dimensional fiber-based composite aerogel type adsorbent preparation method. According to the method, cellulosic fiber, chitosan and sodium alginate which generally exist in natural world are utilized as raw materials. The method comprises the steps: firstly, utilizing periodate and metaphosphoric acid to sequentially chemically modify the cellulosic fiber; then crosslinking the modified cellulosic fiber with the chitosan; then compounding with the sodium alginate; freeze drying to obtain a three-dimensional fiber-based composite aerogel type adsorbent. The prepared adsorbent disclosed by the invention has high safe stability, has a good adsorption effect on negative ion pollutants and positive ion pollutants and can be applied to purifying heavy metal ion wastewater and dyestuff wastewater; in addition, the cellulosic fiber added into the adsorbent disclosed by the invention not only can serve as a framework and a reinforcing material, but also can be crosslinked with the chitosan to improve compression strength, morphology and structural stability of the whole aerogel adsorbent; thus, the adsorbent can be repeatedly used for many times, and the characteristics of rice inner holes and large specific surface area of the aerogel are fully played.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional fiber-based composite airgel adsorbent, in particular to a preparation method of a three-dimensional fiber-based airgel adsorbent capable of adsorbing heavy metal ions and dyes in water bodies. Background technique [0002] With the rapid development of modern industry, a large amount of wastewater is also produced and discharged. The underground and surface water pollution caused by substandard wastewater discharge has become a serious environmental problem in modern society, causing serious pollution to water resources, soil and even air. Industries such as smelting, electronics, mining, pesticides and fertilizers, medicine, papermaking, printing and dyeing produce a large amount of wastewater containing organic, inorganic, radioactive, heavy metals, pathogens and other pollutants. These pollutants enter the natural water body, and the pollution caused by exceeding the self-purifica...

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): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/24B01J20/28047B01J20/28054B01J20/28057C02F1/286C02F2101/20C02F2101/308
Inventor 岳新霞宁晚娥杨观华周水清
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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