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Preparing method for conductive polymer nanoparticle composite TiO2-base thermoelectric material

A conductive polymer and nanoparticle technology, applied in the manufacture/processing of thermoelectric devices, nanotechnology, etc., can solve problems such as reducing thermal conductivity, and achieve the effect of reducing thermal conductivity, improving thermoelectric performance, and low reaction temperature

Inactive Publication Date: 2014-02-19
上海二工大资产经营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sol-gel preparation method enables the uniform distribution of conductive polymer on TiO 2 Surrounding the nanoparticles, it effectively overcomes the shortcomings of the traditional direct addition of nanoparticles that are not easy to disperse, and greatly reduces the thermal conductivity of the material, improving the thermoelectric performance of the nanocomposite material system

Method used

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  • Preparing method for conductive polymer nanoparticle composite TiO2-base thermoelectric material
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  • Preparing method for conductive polymer nanoparticle composite TiO2-base thermoelectric material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] First, mix 34ml of tetrabutyl titanate with 160ml of absolute ethanol and put it in a separatory funnel. Add 90ml of glacial acetic acid and 247.5ml of ethanol with a volume fraction of 95% to the ferric nitrate solution containing 0.003mol of iron, and mix thoroughly for 30 minutes. Then slowly drop the tetrabutyl titanate solution into the ferric nitrate solution, and continue stirring for 1 hour after the dropping to form a uniform and transparent sol. Add 0.0040 g of poly-p-phenylene nanoparticles to the sol, place it at room temperature after ultrasonication for 2 hours until a gel is formed, and dry the gel at 80° C. and grind it into powder. The powder was calcined at high temperature in a muffle furnace for 2 hours, and the bulk thermoelectric material was prepared by spark plasma sintering. The sintering conditions were: the sintering atmosphere was vacuum, the pressure was 60 MPa, the temperature was 750 ° C, and the holding time was 8 minutes. The obtained t...

Embodiment 2

[0025] First, mix 51ml of tetrabutyl titanate with 240ml of absolute ethanol and put it in a separatory funnel. Add 45ml of glacial acetic acid and 247.5ml of ethanol with a volume fraction of 95% to the ferric nitrate solution containing 0.0015mol of iron, and mix thoroughly for 30 minutes. Then slowly drop the tetrabutyl titanate solution into the ferric nitrate solution, and continue stirring for 1 hour after the dropping to form a uniform and transparent sol. Add 0.0016g of poly-p-phenylene nanoparticles to the sol, place it at room temperature after ultrasonication for 2 hours until a gel is formed, and dry the gel at 80°C and grind it into powder. The powder was calcined at high temperature in a muffle furnace for 2 hours, and the bulk thermoelectric material was prepared by spark plasma sintering. The sintering conditions were: the sintering atmosphere was vacuum, the pressure was 30 MPa, the temperature was 850°C, and the holding time was 5 minutes. The resulting comp...

Embodiment 3

[0027] First, mix 68ml of tetrabutyl titanate with 360ml of absolute ethanol and put it in a separatory funnel. Add 90ml of glacial acetic acid and 247.5ml of ethanol with a volume fraction of 95% to the ferric nitrate solution containing 0.02mol of iron, and mix thoroughly for 30 minutes. Then slowly drop the tetrabutyl titanate solution into the ferric nitrate solution, and continue stirring for 1 hour after the dropping to form a uniform and transparent sol. Add 0.0032g of poly-p-phenylene nanoparticles to the sol, place it at room temperature after ultrasonication for 2 hours until a gel is formed, and dry the gel at 80°C and grind it into powder. The powder was calcined at high temperature in a muffle furnace for 2 hours, and the bulk thermoelectric material was prepared by spark plasma sintering. The sintering conditions were: the sintering atmosphere was vacuum, the pressure was 50 MPa, the temperature was 800 ° C, and the holding time was 6 minutes. The resulting comp...

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Abstract

The invention relates to a preparing method for a conductive polymer nanoparticle composite TiO2-base thermoelectric material; the preparing method comprises the following steps of: uniformly mixing tetrabutyl titanate and anhydrous alcohol according to a volume ratio of 17:80, making into a solution, and placing the solution in a separating funnel; adding glacial acetic acid and ethanol into a nitrate solution according to a volume ration of 3:17 and mixing, and fully stirring for 30 min; slowly dropping a tetrabutyl titanate solution into the nitrate solution according to a doping proportion with a molar ratio of 0.1% to 10%, continuously stirring for 1h, and forming a uniform and transparent colloidal sol; adding poly-p-phenylene nanoparticles to the colloidal sol for carrying out ultrasound for two hours, placing the colloidal sol at the room temperature till forming a gel, drying the gel at the temperature of 80 DEG C and grinding the gel into powder; placing the powder in a muffle furnace to be calcined at high temperature for 2h, and sintering and preparing a blocking thermoelectric material by using discharging plasmas. The preparing method of the invention has the advantages of simpleness, low reaction temperature, short time and good chemical homogeneity. According to the preparing method, the thermoelectric performance of a composite nanometer material system is effectively increased.

Description

technical field [0001] The invention relates to a conductive polymer nanoparticle composite TiO 2 Preparation method of based thermoelectric materials. The invention belongs to the technical field of preparation of new energy materials. Background technique [0002] Thermoelectric materials are functional materials that use the Seebeck effect (Seebeck) and Peltier effect (Peltier) of semiconductors to convert thermal energy and electrical energy. Currently, they are mainly used in thermoelectric power generation and thermoelectric refrigeration. Thermoelectric conversion devices have the characteristics of small size, high reliability, no pollution, no noise, and wide application temperature. As special power supplies and high-precision temperature control devices, they have been widely used in high-tech fields such as space technology, military equipment, and IT technology. As energy and environmental issues become increasingly prominent, thermoelectric conversion materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34B82Y40/00
Inventor 吴子华谢华清陈辉杨天灵
Owner 上海二工大资产经营有限公司
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