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PEDOT:CS water dispersion system taking cellulose sulfate as template and preparation method of PEDOT:CS water dispersion system

A technology of cellulose sulfate and dispersion system, applied in the field of PEDOT:CS water dispersion system and its preparation, can solve the problems such as the decrease of the conductivity of PEDOT system, achieve high PEDOT content and conductivity, reduce damage, and broaden the research direction. Effect

Inactive Publication Date: 2021-02-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while PSS is used as a dispersant and stabilizer for PEDOT, the addition of too much insulating PSS (the mass ratio of PEDOT to PSS is 1:2.5) will also reduce the conductivity of the PEDOT system (CN201811582485.4)

Method used

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  • PEDOT:CS water dispersion system taking cellulose sulfate as template and preparation method of PEDOT:CS water dispersion system
  • PEDOT:CS water dispersion system taking cellulose sulfate as template and preparation method of PEDOT:CS water dispersion system

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Add 20 g of sulfamic acid and 4 g of pine pulp cellulose into 100 g of DMF, and react at 90° C. for 4 hours. The solid obtained after filtering the reaction solution is added into deionized water to fully dissolve, then filtered, the filtrate is added to absolute ethanol to precipitate cellulose sulfate, and the obtained solid is freeze-dried after filtering again to obtain cellulose sulfate.

[0044] Add 1g of cellulose sulfate into 100g of deionized water, add 2g of EDOT monomer, stir and disperse for 1h. Then 5 g of ammonium persulfate and 0.2 g of ferric chloride were added, and polymerized for 18 hours under a nitrogen atmosphere, and the polymerization reaction temperature was 35° C. The blue-black aqueous dispersion obtained after the reaction is the PEDOT:CS aqueous dispersion system using cellulose sulfate as a template.

Embodiment 2

[0046] Add 5 g of sulfamic acid and 1 g of pine pulp cellulose into 100 g of DMF, and react at 70° C. for 2 hours. The solid obtained after filtering the reaction solution is added into deionized water to fully dissolve, then filtered, the filtrate is added to absolute ethanol to precipitate cellulose sulfate, and the obtained solid is freeze-dried after filtering again to obtain cellulose sulfate.

[0047] Add 1g of cellulose sulfate into 100g of deionized water, add 0.5g of EDOT monomer, stir and disperse for 1h. Then add 0.75g of ammonium persulfate and 0.025g of ferric chloride, and polymerize for 6 hours under nitrogen atmosphere, and the polymerization reaction temperature is 20°C. The blue-black aqueous dispersion obtained after the reaction is the PEDOT:CS aqueous dispersion system using cellulose sulfate as a template.

Embodiment 3

[0049]Add 10 g of sulfamic acid and 2 g of pine pulp cellulose into 100 g of DMF, and react at 80° C. for 4 hours. The solid obtained after filtering the reaction solution is added into deionized water to fully dissolve, then filtered, the filtrate is added to absolute ethanol to precipitate cellulose sulfate, and after filtering again, the obtained solid is freeze-dried to obtain cellulose sulfate.

[0050] Add 1g of cellulose sulfate into 100g of deionized water, add 1g of EDOT monomer, stir and disperse for 1h. Then add 2g of ammonium persulfate and 0.06g of ferric chloride, and polymerize for 12 hours under nitrogen atmosphere, and the polymerization reaction temperature is 25°C. The blue-black aqueous dispersion obtained after the reaction is the PEDOT:CS aqueous dispersion system using cellulose sulfate as a template.

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Abstract

The invention discloses a PEDOT:CS water dispersion system taking cellulose sulfate as a template and a preparation method of the PEDOT:CS water dispersion system. The method comprises the following steps: adding cellulose sulfate into water to obtain a cellulose sulfate aqueous solution, and then adding a monomer EDOT to obtain a mixed solution; and adding ammonium persulfate and ferric chlorideinto the mixed solution for polymerization reaction to obtain a PEDOT:CS water dispersion system taking cellulose sulfate as a template. On one hand, the invention provides the method for preparing cellulose sulfate, and provides the new PEDOT water dispersion system by replacing PSS with cellulose sulfate as a polymerization template of PEDOT. On the other hand, the prepared PEDOT:CS aqueous dispersion has good system stability, high PEDOT content and high conductivity, and has good application prospects in the fields of electrochromism, electromagnetic shielding, supercapacitors, electrochemical sensors and the like.

Description

technical field [0001] The invention belongs to the field of conductive polymer functional materials, and mainly relates to a PEDOT:CS water dispersion system using cellulose sulfate as a template and a preparation method thereof. Background technique [0002] Cellulose sulfate refers to a kind of cellulose inorganic acid esterification derivatives in which the hydroxyl group in the cellulose structure is partially or completely substituted by sulfate groups. It has multiple properties of biological macromolecules and polyelectrolytes. Therefore, it is widely used in industry, There are a wide range of applications in the fields of materials and biomedicine. Cellulose sulfate is prepared by sulfuric acid esterification. The common esterification reagents are fuming sulfuric acid, concentrated sulfuric acid, sulfur trioxide and chlorosulfonic acid. These esterification reagents are highly corrosive, highly volatile, and highly toxic drugs, which are very harmful to the human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L65/00C08L1/16C08G61/12
CPCC08G61/126C08G2261/11C08G2261/3223C08J3/03C08J2301/16C08J2365/00C08J2401/16C08J2465/00
Inventor 祁海松冯晓王熙军张存智陈怡安袁亚芳
Owner SOUTH CHINA UNIV OF TECH
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