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Ionic liquid doped water-soluble polythiophene composite film as well as preparation method and application thereof

A water-soluble polythiophene, ionic liquid technology, applied in electrolytic organic material plating, coating and other directions, can solve the problems of PEDOT film solubility and electrochromic performance to be improved, hindering electronic transition, reducing electrochromic performance and other problems

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

AI Technical Summary

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 properties of PEDOT films need to be improved.

Method used

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  • Ionic liquid doped water-soluble polythiophene composite film as well as preparation method and application thereof
  • Ionic liquid doped water-soluble polythiophene composite film as well as preparation method and application thereof
  • Ionic liquid doped water-soluble polythiophene composite film as well as 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 an ionic liquid, 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 ionic liquid with the anionic water deposition solution to obtain a deposition solution;

[0031] The deposition solution is used for electrochemical deposition to obtain the ionic liquid-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 i...

Embodiment 1

[0050] A preparation method of a water-soluble polythiophene composite film doped with ionic liquid, comprising the steps of:

[0051] Use an electronic balance to weigh 0.3197g of LiClO 4 , prepared into 30 mL of LiClO 4 Aqueous solution, ultrasonically mixed, weighed 8.925g EDOT and 4.5g SDBS were slowly added dropwise, ultrasonic 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.

[0052] Weigh 5g of the ionic liquid EMI-TFSI and mix it into the above solution, and mix uniformly by ultrasonic to obtain the deposition solution.

[0053] The obtained deposition solution is poured into the electrolytic cell, and the in-situ electrochemical polymerization is carried out by using the Auto-lab electrochemical workstation combined with the three-electrode system. Among them, 9mm×50mm indium tin oxide (ITO) conductive glass is used as W...

Embodiment 2

[0059] A preparation method of a water-soluble polythiophene composite film doped with ionic liquid, comprising the steps of:

[0060] Weigh 0.523g of LiClO using an electronic balance 4 , prepared in 40 mL of LiClO 4 Aqueous solution, ultrasonically mixed, weighed 8.925g EDOT and 6g SDBS were slowly added dropwise, ultrasonic 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.

[0061] Weighed 6 g of ionic liquid 1-ethyl-3-methylimidazolium perchlorate (HOEtMIm-Cl) and mixed it into the above solution, and mixed it uniformly by ultrasonic to obtain a deposition solution.

[0062] The obtained deposition solution is poured into the electrolytic cell, and the in-situ electrochemical polymerization is carried out by using the Auto-lab electrochemical workstation combined with the three-electrode system. Among them, 9mm×50mm indium tin...

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Abstract

The invention provides an ionic liquid doped water-soluble polythiophene composite film as well as a preparation method and application thereof, and belongs to the technical field of electrochromism. The preparation method comprises the following steps of doping sodium polystyrenesulfonate (PSS) into an aqueous solution containing 3, 4-ethylenedioxythiophene (EDOT), lithium perchlorate (LiClO4) and sodium dodecyl benzene sulfonate (SDBS) to obtain a deposition solution containing a large amount of uniformly dispersed anion water to replace a traditional organic solvent-based deposition solution; meanwhile, adding the ionic liquid to promote uniform dispersion of EDOT in the aqueous solution, and increasing free moving ions in the solution; and performing electrochemical deposition by using an electrochemical workstation to obtain the ionic liquid 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 electrochromic performance and also has high cycling stability and electrochemical activity.

Description

technical field [0001] The invention relates to the technical field of electrochromism, in particular to a water-soluble polythiophene composite film doped with an ionic liquid and a preparation method and application thereof. Background technique [0002] At present, the world has entered the era of the fourth industrial revolution dominated by low carbon, energy saving and environmental protection, and new energy. The research on sustainable development and environmentally friendly materials has become an increasingly active research field. People are constantly developing new intelligent and renewable materials. And industrialization technology to meet the development and needs of the times. Electrochromic technology is an emerging industrial technology. Its development and application are constantly changing people's lives, such as smart anti-glare mirrors for cars, smart dimming portholes for aircraft, and smart home blinds that can be dimmed. How to obtain electrochr...

Claims

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Application Information

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IPC IPC(8): C25D9/02C08G61/12C03C17/42
CPCC25D9/02C08G61/126C03C17/42C03C17/006C03C17/002C03C2218/115C03C2217/40C03C2217/70C03C2217/948C08G2261/3223
Inventor 蒋海云吴威梁榕莲张维莉曾海兰
Owner HUNAN UNIV OF TECH
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