A Fabrication Method of Fiber-like Stretchable Thermoelectric Devices Based on Photoreduced Graphene

A thermoelectric device, fibrous technology, applied in the field of preparation of thermoelectric devices, to achieve the effect of excellent stretchability and flexibility, excellent flexibility, and simple process

Active Publication Date: 2018-04-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, there have been more and more researches on macroscopic graphene oxide films and graphene films, but there have been no reports on the controllable single-sided reduction of graphene oxide films by photoreduction and the preparation of thermoelectric energy conversion devices.

Method used

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  • A Fabrication Method of Fiber-like Stretchable Thermoelectric Devices Based on Photoreduced Graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (i) Disperse 0.5g of graphite oxide in 50mL of deionized water, mechanically stir for 15min, ultrasonicate in a water bath for 60min, and probe ultrasonically for 30min to obtain a uniformly dispersed graphene oxide gel;

[0028] (ii) Prepare graphene oxide film by scraping coating on 1000-mesh sandpaper substrate with automatic scraper coating machine, adjust the thickness of scraping coating to 100 μm, dry at room temperature for 6 hours, freeze with liquid nitrogen for 120 seconds, freeze-dry for 24 hours, and peel off from the substrate to obtain Self-supporting three-dimensional graphene oxide film;

[0029] (iii) Reducing the top surface (side A) of the film obtained in (ii) for 60 minutes under a 500W long-arc xenon lamp, with an irradiation distance of 20 cm, and cutting the film into strips with a length of 150 mm and a width of 2 mm;

[0030] (iv) Select 5 film strips obtained in (iii), wind them and fix them on polydimethylsiloxane fibers with a diameter of 1...

Embodiment 2

[0034] (i) Disperse 0.75g of graphite oxide in 50mL of deionized water, mechanically stir for 30min, ultrasonicate in a water bath for 60min, and probe ultrasonically for 45min to obtain a uniformly dispersed graphene oxide gel;

[0035] (ii) Prepare graphene oxide film by scraping coating on 1000-mesh sandpaper substrate with automatic scraper coating machine, adjust scraping coating thickness to 80 μm, dry at room temperature for 5 hours, freeze with liquid nitrogen for 120 seconds, freeze-dry for 24 hours, and peel off from the substrate to obtain Self-supporting three-dimensional graphene oxide film;

[0036] (iii) Reducing the top surface (side A) of the film obtained in (ii) for 30 minutes under an 800W long-arc xenon lamp, with an irradiation distance of 20 cm, and cutting the film into strips with a length of 150 mm and a width of 3 mm;

[0037] (iv) Select 8 film strips obtained in (iii), wind and fix them on polyurethane fibers with a diameter of 1mm according to the...

Embodiment 3

[0040] (i) Disperse 1.0 g of graphite oxide in 50 mL of deionized water, mechanically stir for 30 min, ultrasonically in a water bath for 120 min, and ultrasonically for 30 min with a probe to obtain a uniformly dispersed graphene oxide gel;

[0041] (ii) Prepare a graphene oxide film by scraping coating on a copper foil substrate with an automatic scraper coating machine, adjust the scraping thickness to 50 μm, dry at room temperature for 6 hours, freeze with liquid nitrogen for 60 seconds, freeze-dry for 15 hours, peel off from the substrate, and obtain a self- Supported three-dimensional graphene oxide film;

[0042] (iii) Reducing the top surface (side A) of the film obtained in (ii) under a 1000W long-arc xenon lamp for 20 minutes, with an irradiation distance of 20 cm, and cutting the film into strips with a length of 100 mm and a width of 1 mm;

[0043] (iv) Select 10 film strips obtained in (iii), wind and fix them on the latex fibers with a diameter of 1mm according t...

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Abstract

The invention relates to a preparation method of a fibrous stretchable thermoelectric device based on photoreduction of graphene, which comprises dispersing graphite oxide in deionized water, mechanical stirring, ultrasonication in a water bath, and ultrasonication of a probe to obtain a graphene oxide gel, and then Scrape-coated, dried, frozen with liquid nitrogen, freeze-dried, and peeled off, the obtained self-supporting three-dimensional graphene oxide film was photoreduced on one side and unreduced on the other side, then cut into ribbons, helically wound and fixed on elastic On the polymer fiber, use conductive silver paste to connect the ends of the film strips to realize series connection, and the product is obtained. The assembly process of the present invention does not require an isolation film, the process is simple, and the cost is low. The prepared stretchable fibrous thermoelectric conversion device has excellent stretchability and flexibility, and can be applied to the field of portable detection and the energy supply of smart clothing in the future.

Description

technical field [0001] The invention belongs to the field of preparation of thermoelectric devices, in particular to a preparation method of a fibrous stretchable thermoelectric device based on photoreduced graphene. Background technique [0002] On the one hand, the traditional film-like portable detection and energy harvesting devices are difficult to adapt to the daily movement of the human body because they do not have stretchability, and on the other hand, the comfort of wearing human clothing is greatly reduced due to their airtightness. In addition to being well integrated with human clothing, fiber-shaped sensing and energy harvesting devices can also meet the bending, stretching, twisting and other deformations caused by human movement. It can well ensure the exchange of airflow, heat and moisture inside and outside during the clothing wearing process, thus ensuring the comfort of clothing wearing. [0003] Graphene, as a two-dimensional material formed by sp2 hybr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34
CPCH10N10/01
Inventor 李耀刚郭洋王宏志张青红侯成义
Owner DONGHUA UNIV
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