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Eutectoid doped water-soluble polythiophene composite film and preparation method and application thereof

A technology of water-soluble polythiophene and eutectic melt, applied in electrolytic organic material plating, coating, etc., can solve the problems of hindering electronic transition, PEDOT film solubility and electrochromic performance, and reduce electrochromic performance, etc. question

Active Publication Date: 2021-12-03
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, during the polymerization process of PEDOT film, the molecular structure formed is relatively tight, which will hinder the transition of electrons, thereby reducing its electrochromic performance.
Therefore, the solubility and electrochromic performance of PEDOT film in water need to be improved.

Method used

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  • Eutectoid doped water-soluble polythiophene composite film and preparation method and application thereof
  • Eutectoid doped water-soluble polythiophene composite film and preparation method and application thereof
  • Eutectoid doped water-soluble polythiophene composite film and preparation method and application thereof

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preparation example Construction

[0028] The invention provides a method for preparing a water-soluble polythiophene composite film doped with eutectic melt, comprising the following steps;

[0029] mixing sodium polystyrene sulfonate, 3,4 ethylenedioxythiophene, lithium perchlorate, sodium dodecylbenzene sulfonate and water to obtain an anionic water deposition solution;

[0030] mixing the eutectic melt with the anionic water deposition solution to obtain a deposition solution;

[0031] The deposition solution is used for electrochemical deposition to obtain the eutectic doped water-soluble polythiophene composite film.

[0032] The invention mixes sodium polystyrene sulfonate, 3,4 ethylenedioxythiophene, lithium perchlorate, sodium dodecylbenzene sulfonate and water to obtain anion water deposition solution.

[0033] In the present invention, the mass ratio of the 3,4 ethylenedioxythiophene to lithium perchlorate is preferably 8.925:0.3197-0.638, more preferably 8.925:0.523.

[0034] In the present invent...

Embodiment 1

[0056] A preparation method of a water-soluble polythiophene composite film doped with eutectic melt, comprising the steps of:

[0057] Use an electronic balance to weigh 0.3197g of LiClO 4 and 4.5g SDBS to make 30mL of LiClO 4 The aqueous solution was mixed evenly by ultrasonication, and 8.925g EDOT was weighed and slowly added dropwise, and ultrasonicated for 30min. Use a graduated cylinder to measure 30 mL of the PSS solution and add it to the above solution to obtain a water deposition solution containing a large number of uniformly dispersed anions.

[0058] Choline chloride and urea were mixed and heated in a water bath at a molar ratio of 1:2 and heated for 30 minutes to obtain a eutectic melt. 4 / PSS aqueous solution was added 5 g of eutectic melt, and the deposition solution was obtained after ultrasonic mixing.

[0059] The obtained deposition solution is poured into the electrolytic cell, and the in-situ electrochemical polymerization is carried out by using the ...

Embodiment 2

[0065] A preparation method of a water-soluble polythiophene composite film doped with ionic liquid, comprising the steps of:

[0066] Weigh 0.523g of LiClO using an electronic balance 4 and 6g SDBS to make 40mL of LiClO 4 The aqueous solution was mixed evenly by ultrasonication, and 8.925g EDOT was weighed and slowly added dropwise, and ultrasonicated for 30min. Use a graduated cylinder to measure 40 mL of the PSS solution and add it to the above solution to obtain a water deposition solution containing a large number of uniformly dispersed anions.

[0067] Choline chloride and ethylene glycol were mixed and heated in a water bath with a molar ratio of 1:3 and heated for 30 minutes to obtain a eutectic melt. The temperature of the water bath was 40 ° C, and the LiClO 4 / PSS aqueous solution was added 10 g of eutectic melt, and the deposition solution was obtained after ultrasonic mixing.

[0068] The obtained deposition solution is poured into the electrolytic cell, and th...

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Abstract

The invention provides a eutectoid doped water-soluble polythiophene composite film and a preparation method and application thereof, and belongs to the technical field of electrochromism. The preparation method comprises the following steps that firstly, sodium polystyrenesulfonate (PSS) is placed into an aqueous solution containing 3, 4-ethylenedioxythiophene, lithium perchlorate and sodium dodecyl benzene sulfonate in a doping mode to obtain a water deposition solution containing a large amount of uniformly dispersed anions to replace a traditional organic solvent-based deposition solution; meanwhile, an eutectoid (choline chloride / urea) is added to promote uniform dispersion of EDOT in the aqueous solution, and free moving ions in the solution are increased; and electrochemical deposition is performed by using an electrochemical workstation to obtain the eutectoid doped water-soluble polythiophene composite film. According to the preparation method, an in-situ electrochemical polymerization method is adopted, water-soluble deposition preparation of PEDOT is achieved through secondary doping, and the obtained film has high cycling stability and electrochemical activity while having high electrochromic performance.

Description

technical field [0001] The invention relates to the technical field of electrochromism, in particular to a water-soluble polythiophene composite film doped with eutectic melt and its preparation method and application. Background technique [0002] Electrochromic technology refers to the optical characteristics of electroactive materials, including the transmittance, reflectivity and color of the material, which can undergo reversible changes under an alternating electric field. Because electrochromic materials can adjust the optical properties under the action of small voltage, this technology is widely used in the fields of microelectronics, energy-saving buildings, automobile industry, national defense industry, aerospace and other fields. With the development of science and technology, different kinds of electrochromic materials have been developed. Among them, 3,4-ethylenedioxythiophene (EDOT) and PEDOT (polymer of 3,4-ethylenedioxythiophene) are a kind of cathodic ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/02C08G61/12C03C17/42
CPCC25D9/02C08G61/126C03C17/42C03C17/006C03C17/002C08G2261/3223C03C2217/40C03C2217/70C03C2217/948C03C2218/115
Inventor 蒋海云吴威张维莉曾海兰
Owner HUNAN UNIV OF TECH