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Cellulose/polyaniline nano-porous composite microspheres as well as preparation method and application thereof

A composite microsphere and nanoporous technology, which is applied in the field of polymer material science and technology, can solve the problems of high electrochemical performance and cycle stability, which cannot be satisfied, and achieves good rate capability, simple operation and high cycle stability. Effect

Inactive Publication Date: 2015-09-09
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cellulose / polypyrrole airgel (Angew.Chem.Int.Ed.2014,53,5380-5384) and cellulose / polyaniline composite membrane (Cellulose 2014,21, 2337-2347), but when polyaniline is used as an electrode material, it cannot meet high electrochemical performance and cycle stability

Method used

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  • Cellulose/polyaniline nano-porous composite microspheres as well as preparation method and application thereof
  • Cellulose/polyaniline nano-porous composite microspheres as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 4.2g of cellulose cotton linters in 100g of LiOH / urea aqueous solution (the mass ratio of LiOH to urea is 4.6:15) precooled to -12.6°C to obtain a 4wt% cellulose solution, and centrifuge at 5°C at 7000rpm Degassing to obtain a transparent cellulose solution, then add 3ml of epichlorohydrin to 100g of cellulose solution in an ice-water bath at 0°C and stir for 2 hours to disperse the epichlorohydrin evenly, and finally in an ice-water bath at 0°C, Add 60g Span 80 to a 500ml three-neck flask, stir 300ml isooctane at a speed of 500r / min for 30min to disperse the emulsifier evenly, then stir at a speed of 1000r / min, add the above 60g 4wt% cellulose solution and stir for 30min, remove the ice bath and continue stirring After 2 hours, obtain pure cellulose balls with a maximum size distribution of 2um. After washing with deionized water and ethanol, soak 1g of cellulose balls in 100ml of 0.1mol / L aniline 10wt% phytic acid solution in an ice-water bath at 0°C 30min, t...

Embodiment 2

[0024] Dissolve 4.2g of cellulose cotton linters in 100g of LiOH / urea aqueous solution (the mass ratio of LiOH to urea is 4.6:15) precooled to -12.6°C to obtain a 4wt% cellulose solution, and centrifuge at 5°C at 7000rpm Degassing to obtain a transparent cellulose solution, then add 3ml of epichlorohydrin to 100g of cellulose solution in an ice-water bath at 0°C and stir for 2 hours to disperse the epichlorohydrin evenly, and finally in an ice-water bath at 0°C, Add 30g Span 80 to a 500ml three-neck flask, stir 300ml isooctane at a speed of 500r / min for 30min to disperse the emulsifier evenly, then stir at a speed of 1000r / min, add the above 60g 4wt% cellulose solution and stir for 30min, remove the ice bath and continue stirring After 2 hours, obtain pure cellulose balls with a maximum size distribution of 6um. After washing with deionized water and ethanol, soak 1g of cellulose balls in 100ml of 0.1mol / L aniline 10wt% phytic acid solution in an ice-water bath at 0°C 30min, t...

Embodiment 3

[0026] Dissolve 4.2g of cellulose cotton linters in 100g of LiOH / urea aqueous solution (the mass ratio of LiOH to urea is 4.6:15) precooled to -12.6°C to obtain a 4wt% cellulose solution, and centrifuge at 5°C at 7000rpm Degassing to obtain a transparent cellulose solution, then add 3ml of epichlorohydrin to 100g of cellulose solution in an ice-water bath at 0°C and stir for 2 hours to disperse the epichlorohydrin evenly, and finally in an ice-water bath at 0°C, Add 20g Span 80 to a 500ml three-neck flask, stir 300ml isooctane at a speed of 500r / min for 30min to disperse the emulsifier evenly, then stir at a speed of 1000r / min, add the above 60g 4wt% cellulose solution and stir for 30min, remove the ice bath and continue stirring After 2 hours, obtain pure cellulose balls with a maximum size distribution of 8um. After washing with deionized water and ethanol, soak 1g of cellulose balls in 100ml of 0.1mol / L aniline 10wt% phytic acid solution in an ice-water bath at 0°C 30min, t...

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Abstract

The invention discloses cellulose / polyaniline nano-porous composite microspheres. The microspheres take a cellulose solution as a dispersion phase, regenerated cellulose microspheres are prepared with an emulsion method, then under the bridge action that hydrogen bonds can be formed by the phytic acid and cellulose and by the phytic acid and polyaniline respectively, the polyaniline is polymerized in situ on the regenerated cellulose microspheres, and the cellulose / polyaniline composite microspheres are obtained. When the microspheres are used for constructing an electrode material, charging and discharging velocities and stability of the electrode material are obviously improved. Thus, the composite microspheres have the potential application prospect in the aspect of electrochemical devices.

Description

technical field [0001] The invention relates to a cellulose / polyaniline nanoporous composite microsphere and its preparation method and application, which belong to the field of polymer material science and technology, and also belong to the field of electrochemistry. Background technique [0002] In the 21st century, in order to solve the energy crisis, the development direction of science and technology has gradually shifted to the development and utilization of renewable biomass resources. Cellulose is the most abundant macromolecule in nature, and has excellent properties such as wide sources, safety, non-toxicity, biodegradability and derivatization. A series of new solvents composed of alkali / urea developed by our laboratory for dissolving cellulose have the characteristics of low cost and high efficiency in dissolving cellulose, which expands the development and application of cellulose functional materials. Cellulose gel is a new type of functional biopolymer materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02H01G11/24H01G11/48
CPCY02E60/13
Inventor 张俐娜徐鼎峰蔡杰
Owner WUHAN UNIV
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