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Preparation method for PEDOT (polymer ethylenedioxy thiophene)/nano titanium dioxide aqueous dispersion

A nano-titanium dioxide and dispersion technology, applied in the field of inorganic semiconductors and organic semiconductors, can solve problems such as the decrease of electrical conductivity, and achieve the effect of good electrical conductivity and good stability

Active Publication Date: 2014-12-10
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the presence of insulating PSS makes the PEDOT:PSS conductivity decrease

Method used

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  • Preparation method for PEDOT (polymer ethylenedioxy thiophene)/nano titanium dioxide aqueous dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1a

[0022] (1) At room temperature, add 1.6gPSS (Mn=40000), 0.64gEDOT, 0.8g nano-TiO to a 250ml reaction bottle 2 Dispersion (Nano TiO 2 The solid content of the dispersion is 20%), 80ml deionized water, dissolve and stir until clear, then add 3.08g (NH 4 ) 2 S 2 o 8 , 0.0036gFe 2 (SO 4 ) 3 , 40ml of deionized water, dissolved and stirred evenly, stirred and reacted at 35°C for 24 hours to obtain an aqueous dispersion;

[0023] (2) Centrifuge the aqueous dispersion prepared in step (1) to obtain solid-liquid stratification, remove the upper layer, take the lower layer of solid and dissolve it with distilled water to the quality of the initial aqueous dispersion, repeat the above operations three times (i.e. repeat 3 times After the operation of "centrifugation of the aqueous dispersion → removal of the upper layer → dissolving the solid in the lower layer with distilled water", the obtained aqueous dispersion was dispersed by ultrasonic (600W) for 1 hour to obtain the PEDOT...

Embodiment 1b

[0027] (1) At room temperature, add 0.64g EDOT and 0.8g nano-TiO to a 250ml reaction bottle 2 Dispersion (Nano TiO 2 The solid content of the dispersion is 20%), 80ml deionized water, dissolve and stir until clear, then add 3.08g (NH 4 ) 2 S 2 o 8 , 0.0036gFe 2 (SO 4 ) 3 , 40ml of deionized water, dissolved and stirred evenly, stirred and reacted at 35°C for 24 hours to obtain an aqueous dispersion;

[0028] (2) Centrifuge the aqueous dispersion prepared in step (1) to obtain solid-liquid stratification, remove the upper layer, take the lower layer of solid and dissolve it with distilled water to the quality of the initial aqueous dispersion, repeat the above operations three times (i.e. repeat 3 times After the operation of "centrifugation of the aqueous dispersion → removal of the upper layer → dissolving the solid in the lower layer with distilled water", the obtained aqueous dispersion was dispersed by ultrasonic (600W) for 1 hour to obtain the PEDOT / nano-titanium d...

Embodiment 2

[0032] (1) At room temperature, add 2.4gPSS (Mn=80000), 0.275gEDOT, 0.67g nano-TiO to a 250ml reaction bottle 2 Dispersion (Nano TiO 2 The solid content of the dispersion is 20%), 60ml deionized water, dissolve and stir until clear, then add 0.7672gK 2 S 2 o 8 , 0.0038gFe 2 (SO 4 ) 3 , 33ml of deionized water, dissolved and stirred evenly, stirred and reacted at 40°C for 18 hours to obtain an aqueous dispersion;

[0033] Step (2) is identical with embodiment 1. After the obtained PEDOT / nano-titanium dioxide dark blue aqueous dispersion was placed at 26° C. for 140 days, the dispersion liquid was observed and found to be transparent without delamination or precipitation.

[0034] The PEDOT / nano-titanium dioxide dark blue aqueous dispersion prepared in this example was coated on the PP film, dried at 80°C for 6 hours, and the resistance of the dried film was measured with four probes, and the surface sheet resistance was 247.1kΩ / □.

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Abstract

The invention belongs to the technical field of inorganic semiconductors and organic semiconductors and particularly relates to a preparation method for PEDOT (polymer ethylenedioxy thiophene) aqueous dispersion containing nano titanium dioxide. The preparation method comprises the following steps: adding nano TiO2 dispersion liquid, EDOT monomer, PSS (polystyrolsulfon acid) (can be added or not added) and deionized water into 250ml of a reaction bottle for stirring and dissolving; then, adding a certain amount of an oxidant and a catalyst into the mixture, reacting the mixture for 12-24 hours at 30-45 DEG C under heating and stirring to obtain aqueous dispersion; centrifuging the prepared aqueous dispersion, removing supernatant, getting lower-layer solids and dissolving the lower-layer solids in distilled water, ultrasonically dispersing the mixture to obtain the PEDOT / nano titanium dioxide aqueous dispersion. The PEDOT / nano titanium dioxide aqueous dispersion has relatively good electrical conductivity and transparency, and good stability, and can be placed for a long time at the room temperature without being layered.

Description

technical field [0001] The invention belongs to the technical field of inorganic semiconductors and organic semiconductors, and in particular relates to a preparation method of a PEDOT water dispersion containing nanometer titanium dioxide. Background technique [0002] As a new type of conductive polymer material, PEDOT has the advantages of high electrical conductivity, good environmental stability, and high visible light transmittance in thin-film state in its doped state. It has attracted widespread attention since it came out. When the water-soluble polyelectrolyte sodium polystyrene sulfonate (PSS) participates in the polymerization of EDOT as a dopant and electron balancer, the prepared PEDOT:PSS composite film not only has good film-forming properties, stability and high visible light Transmittance, and the water dispersibility of the composite material is also greatly improved. These advantages make PEDOT:PSS widely used in organic light-emitting diodes, solar cell...

Claims

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Application Information

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IPC IPC(8): C08G61/12C08K3/22C08L25/18
Inventor 范小兴李坚顾佳欢汪称意任强朱凯柏天鹏
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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