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Wearable thermoelectric bracelet and preparation method thereof

A wristband and thermoelectric technology, which is applied in the manufacture/processing of thermoelectric devices, bracelets, watch straps, etc., can solve the problem of inability to match the direction of human heat flow, and achieve the effects of improving the utilization rate of temperature difference, increasing efficiency, and simple preparation method.

Pending Publication Date: 2022-08-09
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology, and provide a wearable thermoelectric bracelet and its preparation method to solve the problem that the current common two-dimensional structure thermoelectric devices can only collect heat in the plane and cannot match the heat flow of the human body in the environment direction problem

Method used

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  • Wearable thermoelectric bracelet and preparation method thereof
  • Wearable thermoelectric bracelet and preparation method thereof
  • Wearable thermoelectric bracelet and preparation method thereof

Examples

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preparation example Construction

[0046] The embodiment of the present invention also provides a preparation method of a wearable thermoelectric wristband, the method comprising the following steps:

[0047] S1. Add 0.05-0.2 g of N-type material, 3-10 wt % of dispersant cetyl trimethyl ammonium bromide and 5-15 wt % of polyurethane into 5-20 ml of solvent, ultrasonically and stirred to prepare N-type paint. Specifically, the N-type material adopts one of nitrogen-doped multi-walled carbon nanotubes, bismuth telluride, and nitrogen-doped graphene, and is dispersed in an aqueous solution to make a slurry, and the addition of 5-15wt% of polyurethane improves its performance. film-forming. Preferably, the concentration of nitrogen-doped multi-walled carbon nanotubes in the N-type coating is in the range of 5-15 mg / mL.

[0048] S2. Add 5-10V% dimethyl sulfoxide into 2-10ml of P-type material and stir to prepare P-type paint. Specifically, the P-type material is a commercialized PEDOT:PSS aqueous dispersion, and ...

example 1

[0052] 1. Add 1g CTAB (dispersant cetyltrimethylammonium bromide) to 19ml deionized water to prepare a CTAB aqueous solution with a mass fraction of 5%; add 2g WPU (polyurethane) to the CTAB aqueous solution and wait for it to disperse evenly After that, 10 wt% nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs) were added, ultrasonicated for 1 h, and then stirred for 2 h to prepare an N-type coating.

[0053] 2. Add 0.2 ml of dimethyl sulfoxide (DMSO) to 2.8 ml of poly-3,4-ethylenedioxythiophene:polystyrene sulfonic acid (PEDOT:PSS) and stir for 24 hours to obtain a P-type coating.

[0054] 3. Through the pre-prepared mask, the P-type coating and the N-type coating are sequentially coated on the substrate in an array with a brush, and then the P and N-type thermoelectric coatings are sequentially connected with silver glue to form a electrical series path.

[0055] 4. The flexible fiber paper substrate coated with thermoelectric material is folded back along both sides o...

example 2

[0058] 1. Add 1 g of CTAB to 19 ml of deionized water to prepare a CTAB aqueous solution with a mass fraction of 5%; add 2 g of WPU to the CTAB aqueous solution, and after it is uniformly dispersed, add 5 wt% of nitrogen-doped multi-walled carbon nanotubes (N- MWCNTs), sonicated for 1 h, and then stirred for 2 h to prepare an N-type coating.

[0059] 2. Add 0.2 ml of dimethyl sulfoxide (DMSO) to 2.8 ml of poly-3,4-ethylenedioxythiophene:polystyrene sulfonic acid (PEDOT:PSS) and stir for 24 hours to obtain a P-type coating.

[0060] 3. Through the pre-prepared mask, the P-type coating and the N-type coating are sequentially coated on the substrate in an array with a brush, and then the P and N-type thermoelectric coatings are sequentially connected with silver glue to form a electrical series path.

[0061] 4. The flexible fiber paper substrate coated with thermoelectric material is folded back along both sides of the midline and sewed with needles and threads to form a strip;...

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Abstract

The invention discloses a wearable thermoelectric bracelet and a preparation method thereof. The thermoelectric bracelet is formed by arranging a P-type thermoelectric material and an N-type thermoelectric material according to a specific mode and connecting the P-type thermoelectric material and the N-type thermoelectric material through elargol. According to the thermoelectric bracelet, flexible fiber paper serves as a substrate, P-type and N-type thermoelectric materials are evenly coated on the flexible substrate and bent to form a 3D annular structure, soft cotton materials with low heat conductivity and high bulkiness serve as heat insulation filler, and power generation in the direction perpendicular to the temperature difference direction of the human body can be achieved to the maximum extent when the bracelet is worn on the wrist. The 3D structure thermoelectric bracelet designed by the invention can overcome the problem that the current common two-dimensional structure thermoelectric device can only collect heat in the plane and cannot be matched with the heat flow direction of the human body in the environment. The bracelet is easy to operate, low in cost, clean, safe, free of moving parts, large in temperature difference utilization rate and high in wearing comfort, has a high application prospect in the wearable field, and can greatly promote practical application of thermoelectric devices in the aspect of self-driven energy supply of wearable equipment.

Description

technical field [0001] The invention relates to the field of wearable thermoelectric devices, in particular to a wearable thermoelectric wristband and a preparation method thereof. Background technique [0002] With the development of wearable electronic devices, it has shown broad application prospects in the fields of vital sign monitoring and human-computer interaction, and has developed rapidly. The question of how to power them is gradually attracting attention. Most wearable devices are still powered by batteries, which are subject to frequent battery charging, replacement and pollution problems. It meets the technical requirements of development, green environmental protection, high stability and reliability. It is an effective idea to directly obtain energy from the environment or the human body to power electronic devices and construct a self-driving energy system. [0003] Thermoelectric material, also known as thermoelectric material, is an environment-friendly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/32H01L35/34C09D175/04C09D5/00C09D7/61C09D165/00C09D125/18A44C5/00A44C27/00H10N10/17H10N10/01
CPCC09D175/04C09D5/00C09D7/61C09D165/00C09D125/18A44C5/00A44C27/00H10N19/101H10N10/01H10N10/17C08K3/041C08L25/18
Inventor 宋海军孙嘉肖姚媛媛张礼兵汤成莉黄风立左春柽
Owner JIAXING UNIV
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