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Method for preparing high thermoelectric performance silver selenide/nylon flexible composite film

A thermoelectric performance, composite film technology, applied in the direction of coating, can solve problems such as limiting the application of flexible thermoelectric materials, and achieve the effect of performance improvement, strong bonding force, and excellent flexibility

Active Publication Date: 2019-02-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently prepared Ag 2 Se materials are all inflexible, which limits their application in flexible thermoelectric materials

Method used

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  • Method for preparing high thermoelectric performance silver selenide/nylon flexible composite film
  • Method for preparing high thermoelectric performance silver selenide/nylon flexible composite film
  • Method for preparing high thermoelectric performance silver selenide/nylon flexible composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation of high thermoelectric performance silver selenide (Ag 2 Se) / nylon flexible composite film method, the method will 20ml selenium nanowire (Se) ethylene glycol (EG) dispersion (45mmol / L), 0.6g silver nitrate (AgNO 3 ) and 80ml of ethylene glycol were added to the beaker, stirred at room temperature for 2 hours, centrifuged at a speed of 4000r / min, and the black precipitate was extracted, and deionized water and absolute ethanol were added alternately at a speed of 4000r / min. Remove impurities. After centrifugation, disperse the carefully cleaned black target product in 15ml of absolute ethanol for 30 minutes of ultrasonic dispersion, and then use nylon filter membrane as a substrate to obtain a silver selenide / nylon flexible membrane by vacuum filtration. The obtained membrane Dry in a vacuum oven at 60°C for 12 hours. After taking out the film, it is hot-pressed, 200℃, 1MPa hot-pressed for 30min, the conductivity can be obtained: ~497S / cm, Seebeck coeffic...

Embodiment 2

[0032] A preparation of high thermoelectric performance silver selenide (Ag 2 Se) / nylon flexible composite film method, the method will 20ml selenium nanowire (Se) ethylene glycol (EG) dispersion (45mmol / L), 0.6g silver nitrate (AgNO 3 ) and 80ml of ethylene glycol were added to the beaker, stirred at room temperature for 2 hours, centrifuged at a speed of 4000r / min, and the black precipitate was extracted, and deionized water and absolute ethanol were added alternately at a speed of 4000r / min. Remove impurities. After centrifugation, disperse the carefully cleaned black target product in 15ml of absolute ethanol for 30 minutes of ultrasonic dispersion, and then use nylon filter membrane as a substrate to obtain a silver selenide / nylon flexible membrane by vacuum filtration. The obtained membrane Dry in a vacuum oven at 60°C for 12 hours. Available conductivity: ~202S / cm, Seebeck coefficient -75.5μV K -1 , power factor is about 115μW m -1 K -2 silver selenide / nylon flexibl...

Embodiment 3

[0034] A method for preparing silver selenide / nylon flexible composite film with high thermoelectric performance, the method is ethylene glycol (EG) dispersion (45mmol / L) of 20ml selenium nanowire (Se), 0.3g silver nitrate (AgNO 3) and 80ml of ethylene glycol were added to the beaker, stirred at room temperature for 4 hours, centrifuged at a speed of 4000r / min, and the black precipitate was extracted, and deionized water and absolute ethanol were added alternately and washed by centrifugation at a speed of 4000r / min for 5min. Remove impurities. After centrifugation, disperse the carefully cleaned black target product in 15ml of absolute ethanol for 30 minutes of ultrasonic dispersion, and then use nylon filter membrane as a substrate to obtain a silver selenide / nylon flexible membrane by vacuum filtration. The obtained membrane Dry in a vacuum oven at 60°C for 12 hours. After the film is taken out, it is hot-pressed at 200°C and 4MPa for 30 minutes, and the power factor can be...

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Abstract

The invention relates to a method for preparing a high thermoelectric performance silver selenide / nylon flexible composite film. The method comprises the following steps: (1) taking glycol dispersionliquid of the selenium nanowire, silver nitrate and a glycol solvent, stirring and mixing the the materials, and performing steps of reacting, centrifuging and washing to obtain a silver selenide nanowire; (2) taking the silver selenide nanowire prepared in the step (1) and dispersing the material in absolute ethanol, using a nylon filter membrane as a sinking bottom, and performing vacuum-filtering to obtain a silver selenide / nylon flexible film; and (3) finally, performing vacuum drying on the silver selenide / nylon flexible film obtained in the step (2), and then performing hot pressing to obtain the target product. Compared with the prior art, an inorganic phase and a flexible substrate of the composite film prepared by the invention has strong binding force, the composite film has superior flexibility, and is favorable for use on a flexible device.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric material preparation, and relates to a method for preparing a silver selenide / nylon flexible composite film with high thermoelectric performance. Background technique [0002] Thermoelectric materials are a class of functional materials that can directly convert thermal energy to electrical energy. Thermoelectric power generation and refrigeration devices prepared by thermoelectric materials have the advantages of simple structure, small size, no moving parts, no wear, no noise, no pollution, etc. As an environmentally friendly material, thermoelectric materials have broad application prospects. [0003] The performance index of thermoelectric materials is generally measured by the dimensionless figure of merit ZT, and its expression is as follows: ZT=α 2 σT / κ, where: α is the Seebeck coefficient; σ is the electrical conductivity; κ is the thermal conductivity; T is the thermodynamic temp...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08J7/06C08L77/00
CPCC08J7/00C08J7/06C08J2377/00
Inventor 蔡克峰丁宇飞
Owner TONGJI UNIV
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