Polythiophene derivative aqueous dispersion and preparation method thereof

A technology of polythiophene derivatives, which is applied in the field of preparation of aqueous dispersions and polythiophene derivative aqueous dispersions, can solve the problems of dispersion stability, poor electrical conductivity, poor consistency of polymerization degree, and easy occurrence of peroxidation, etc. problem, to achieve the effect of low equipment requirements, good stability and simple method

Active Publication Date: 2014-04-09
SHENZHEN CAPCHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Add the oxidant first and then add the monomer. At the beginning, the oxidant / monomer ratio is high, and peroxidation is prone to occur. If the monomer is added first, then the oxidant is added. The polymer formed at the beginning is also prone to peroxidation at a relatively high oxidant concentration. Problems, and the two addition methods, the ratio of oxidant / monomer is constantly changing, the degree of polymerization is poor, the stability of the obtained dispersion and the conductivity are poor

Method used

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  • Polythiophene derivative aqueous dispersion and preparation method thereof
  • Polythiophene derivative aqueous dispersion and preparation method thereof
  • Polythiophene derivative aqueous dispersion and preparation method thereof

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[0029] The preparation method of the aqueous dispersion of polythiophene derivatives of the present invention includes the following polymerization process: first mix the oxidant aqueous solution and 3,4-dialkoxythiophene represented by the following formula (1); drop the mixed solution Add it to the solution containing the polyanion, or another way to realize it, do not mix the oxidant aqueous solution and the thiophene monomer represented by the following formula (1), and at the same time add it dropwise to the solution containing the polyanion in proportion, and stir it under high shear for 18 -30h, polymerize 3,4-dialkoxythiophene, then add anion and cation resin and stir for 8-16h, then filter;

[0030]

[0031] (1) In the formula, R 1 , R 2 are independent of each other and are hydrogen or C 1-4 Alkyl groups, or together form C 1-4 The alkylene group, the alkylene group can be arbitrarily substituted; the molar ratio of the oxidant to 3,4-dialkoxythiophene is 1.5 t...

Embodiment 1

[0043] Add 100g of polystyrene sulfonic acid to 2000g of deionized water, add and stir for 30 minutes, then mix 50g of 35% sodium persulfate aqueous solution, 14.4g of 1% ferric sulfate aqueous solution and 9.1g of 3,4-dialkoxythiophene Add it to the above aqueous solution, drop it for about 2 hours, and stir it with a high-shear emulsifier at 3000 rpm for 24 hours at 25°C under the protection of nitrogen. After the reaction finishes, add 200g cationic resin, 200g anionic resin in reaction system. Stir mechanically at 300 rpm for 12 hours, filter off the resin, and obtain poly(3,4-dialkoxythiophene) polyanion dispersion. Test, solid content 1.34%, viscosity 1500cps, particle size d 50 110nm, conductivity (with 5% DMSO added) 380S / cm.

Embodiment 2

[0045] Add 100g of polystyrene sulfonic acid to 2000g of deionized water, add and stir for 30 minutes, then 64.4g of 30% sodium persulfate aqueous solution is evenly added dropwise to the polystyrene sulfonic acid aqueous solution at a speed of 1g / min, and at the same time 9.1g of 3,4-dialkoxythiophene was evenly added dropwise at a speed of 0.14g / min into the polystyrenesulfonic acid aqueous solution, and stirred for 30h. After the reaction, 200g of cationic resin was added to the reaction system, 200g of anionic resin was stirred for 8 hours, and the resin was filtered off to obtain poly(3,4-dialkoxythiophene) polyanion dispersion. Test, solid content 1.35%, viscosity 1450cps, particle size d 50 108nm, conductivity (with 5% DMSO added) 400S / cm.

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Abstract

The invention discloses a preparation method of a polythiophene derivative aqueous dispersion. The preparation method comprises the following polymerization processes: firstly mixing an oxidant aqueous solution with 3,4-dialkoxythiophene shown in a formula (1) in the specification; dropwise adding the solution obtained after mixing to a solution containing polyanions, carrying out high-shear stirring for 24 hours to polymerize 3,4-dialkoxythiophene, then adding cation-anion resins, stirring the materials for 12 hours and filtering the product, thus obtaining the polythiophene derivative aqueous dispersion. The preparation method has the beneficial effects that the preparation method has the advantage that the proportion of an oxidant to EDOT (3,4-ethylenedioxythiophene) can be always kept consistent, so that the dispersion liquid with good stability is obtained; the preparation method is simple and is mild in production conditions and low in requirements of instruments and equipment; through changes of the factors such as preparation conditions, aftertreatment modes or additives and the like, the parameters such as solid content, acidity, viscosity, granularity and the like of the aqueous dispersion and the parameters such as electrical conductivity or light transmittance and the like can be adjusted, thus being suitable for different application requirements.

Description

technical field [0001] The invention belongs to the field of conductive polymer materials, in particular to a preparation method of polythiophene derivative water dispersion and the water dispersion obtained by the method. Background technique [0002] Conductive polymers are a class of polymer compounds with a conjugated π bond structure. After chemical or electrochemical doping with anions or cations, special conductive polymer materials are formed, including polyacetylene, polythiophene, and polypyrrole. , polyaniline, polyparaphenylene, polycarbazole, polyfluorene, etc. The outstanding advantages of conductive polymers are that they not only have the optoelectronic properties of metals and semiconductor materials, but also have good stability and mechanical properties of polymers, are relatively light in weight, and are easy to process. At present, the most successful conductive polymers in the industrial field are polyaniline and polythiophene, especially poly(3,4-ethy...

Claims

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Application Information

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IPC IPC(8): C08J3/07C08L25/18C08L65/00C08G61/12
Inventor 赵大成李付亚
Owner SHENZHEN CAPCHEM TECH
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