Green washing wearable thermoelectric self-powered sensing device and preparation method thereof

A sensing device, self-powered technology, applied in chemical instruments and methods, electrical components, generators/motors, etc. The effect of conversion efficiency, good flexibility

Active Publication Date: 2022-04-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional inorganic thermoelectric materials are usually composed of transition metal elements such as tellurium, bismuth, etc., but thermoelectric generators composed of these materials are usually hard, which is not conducive to the use of wearable devices

Method used

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  • Green washing wearable thermoelectric self-powered sensing device and preparation method thereof
  • Green washing wearable thermoelectric self-powered sensing device and preparation method thereof
  • Green washing wearable thermoelectric self-powered sensing device and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0047] (4) Preparation of wearable thermoelectric self-powered sensors: the p-type carbon nanotubes / catkin flexible composite film coated with silane and the n-type carbon nanotube / catkin flexible composite film coated with silane were cut into long strips, Then, thermoelectric devices are connected in series and thermal parallel, and the wearable thermoelectric self-powered sensor can be obtained by connecting the thermoelectric devices to the bend of the finger, and the prepared thermoelectric devices are connected in series with the booster module to further increase the output voltage. Light up small light bulbs or power low-power wearable devices.

[0048] Among them, the boost module used is BQ25504, BQ25505 or SPV1050.

Embodiment 1

[0051] (1) The catkin suspension is prepared by the following method: remove the seeds and impurities in the catkins obtained from nature with deionized water and ethanol, add 10 mg of catkins that have been processed into a chloroform solution, and place them in a constant temperature water bath at 70°C to Stir, then wash with deionized water to complete the dewaxing process; then add it to 1wt.% sodium chlorite solution, adjust the pH to 4-5 with glacial acetic acid, stir for 2h to remove lignin, and finally add .% sodium hydroxide solution and stirred for 2 hours to remove the hemicellulose, and the catkin suspension can be obtained after repeated washing with deionization.

[0052] (2) Preparation of p-type carbon nanotubes / catkin flexible composite film: obtain catkin suspension according to the method in step (1), add 5 mg of carbon nanotubes to the catkin suspension, and use ultrasonic crusher to crush for 2 hours, Then use water-bath ultrasound to disperse at room temp...

Embodiment 2

[0063] The difference from Example 1 is that the mass fraction of the n-type dopant N-DMBI in Example 2 is 1:100.

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Abstract

The invention discloses a green washing wearable thermoelectric self-powered sensing device and a preparation method thereof, and the method comprises the steps: adding a carbon nanotube into a catkin suspension, and carrying out the treatment to obtain a p-type carbon nanotube / catkin flexible composite film; adding an n-type dopant into an organic solvent, dropwise coating the p-type carbon nanotube / catkin flexible composite film with the n-type dopant, and carrying out patterning treatment to obtain an n-type carbon nanotube / catkin flexible composite film; coating the surfaces of the p-type carbon nano tube / catkin flexible composite film and the n-type carbon nano tube / catkin flexible composite film with silane; and then cutting into a long strip shape, and adopting electric series connection and thermal parallel connection to obtain the wearable thermoelectric self-powered sensing device. According to the invention, the p-type carbon nanotube / catkin thermoelectric film can be successfully transformed into the n-type through the n-type dopant, and the prepared thermoelectric device made of the full-biological composite material generates high output voltage of 4.17 V under the help of 280mV voltage provided by the boost converter and the power supply, and successfully lightens the LED lamp.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric energy conversion, and relates to a green washable wearable thermoelectric self-powered sensor device and a preparation method. Background technique [0002] Wearable devices bring convenience to people's life, so the research and development of wearable devices has received more and more attention. For example, sports bracelets are commonly used to monitor some health indicators. Google is also working on a pair of wearable smart glasses that combine a smartphone, GPS, and a camera. According to Statista, an international data analysis company, the global wearable device market will reach a scale of 5.1 billion US dollars in 2020 [Adv. Mater. 31, 1807916 (2019)]. [0003] The power supply sources of traditional wearable devices mainly include batteries and capacitors. However, these batteries have a short service life, and there are hidden dangers of safety and environmental pollution. ...

Claims

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Application Information

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IPC IPC(8): G01K13/20G01K1/02H02N11/00C09K5/14
CPCG01K13/20G01K1/02H02N11/002C09K5/14
Inventor 王洪王一卓宁伟
Owner XI AN JIAOTONG UNIV
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