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Flexible temperature-pressure sensor, and preparation method and application thereof

A pressure sensor and flexible technology, applied in the field of sensing materials, can solve problems such as the influence of temperature sensing reliability, achieve the effect of improving thermoelectric performance and avoiding mutual interference

Active Publication Date: 2020-01-31
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, only efforts are made to utilize the response of thermoelectric composite materials to temperature changes to realize temperature sensing, and in order to improve the sensitivity of thermoelectric composite materials to temperature difference sensing, in the prior art, all are in The thermoelectric material is coated on the strip-shaped substrate to prepare a strip-shaped thermoelectric composite material, and then the two ends of the strip-shaped thermoelectric composite material are sensed to realize the transmission in the plane direction of the substrate. Sensitivity, when the thermoelectric composite material is deformed, it may affect the reliability of temperature sensing

Method used

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  • Flexible temperature-pressure sensor, and preparation method and application thereof
  • Flexible temperature-pressure sensor, and preparation method and application thereof
  • Flexible temperature-pressure sensor, and preparation method and application thereof

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preparation example Construction

[0039] see figure 1 As shown, the preparation method of the flexible temperature-pressure sensor provided by the invention comprises the following steps:

[0040] S1. Prepare a thermoelectric material solution;

[0041] S2. Dip the flexible three-dimensional fiber substrate in the solution of the thermoelectric material, and then take it out and dry it to obtain the flexible temperature-sensitive and pressure-sensitive three-dimensional fiber material;

[0042] S3. Prepare upper and lower electrodes on the upper and lower surfaces of the flexible temperature-sensitive and pressure-sensitive three-dimensional fiber material to obtain the flexible temperature-pressure sensor.

[0043]Preferably, the flexible three-dimensional fiber substrate should have a certain degree of hydrophilicity, such as knitted fabrics prepared by compounding one or more fibers in cotton, polyester, nylon, polyurethane, polyamide, glass fiber, and carbon fiber, Woven, non-woven or three-dimensional f...

Embodiment 1

[0054] The flexible temperature-pressure sensor that embodiment 1 provides, its preparation method is as follows:

[0055] S1. Select PEDOT:PSS aqueous solution (specification: Clevios PH1000, concentration: 1.3wt%) as the thermoelectric material solution;

[0056] S2. Select a three-dimensional fabric with a size of 10mm×10mm×2mm as a flexible three-dimensional fiber substrate, and immerse it in the PEDOT:PSS aqueous solution described in step S1, accompanied by ultrasonic treatment for 2 hours, then take it out, and dry it at 130°C 15min;

[0057] Then immerse in the PEDOT:PSS aqueous solution prepared in step S1 again, accompanied by ultrasonic treatment for 30 minutes, and after taking it out, dry it at 130°C for 15 minutes;

[0058] S3. Brush silver paste on the upper and lower surfaces of the prepared flexible temperature-sensitive and pressure-sensitive three-dimensional fiber material as an electrode with a thickness of 40 μm, and dry it at 80° C. for 5 minutes to obt...

Embodiment 2

[0060] As an improvement, the flexible temperature-pressure sensor provided in embodiment 2 has a preparation method as follows:

[0061] S1. Add DMSO with an aqueous solution volume fraction of 5% to PEDOT:PSS aqueous solution (specification: Clevios PH1000, concentration: 1.3wt%), and then sonicate for 1 hour to obtain PEDOT:PSS mixed solution;

[0062] S2. Select a three-dimensional fabric with a size of 10mm × 10mm × 2mm, including an intermediate layer with a void structure, as a flexible three-dimensional fiber substrate, and immerse it in the PEDOT:PSS mixed solution prepared in step S1, accompanied by ultrasonic treatment for 2 hours, and then Take it out and dry it at 130°C for 15 minutes;

[0063] Then immerse in the PEDOT:PSS mixed solution prepared in step S1 again, accompanied by ultrasonic treatment for 30 minutes, and after taking it out, dry it at 130°C for 15 minutes;

[0064] Immediately immerse the sample in the EG solution after taking it out, soak it for ...

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Abstract

The invention provides a flexible temperature-pressure sensor, and a preparation method and an application thereof. The flexible temperature-pressure sensor comprises a flexible temperature sensing and pressure sensing three-dimensional fiber material and upper and lower electrodes. Through an impregnation-adsorption method, PEDO: PSS with excellent electrical conductivity and thermoelectricity isattached to a flexible three-dimensional fiber substrate to form conductive and thermoelectric paths, temperature difference automatic power generation on the thickness of the flexible three-dimensional fiber substrate and functions of the temperature-pressure sensor are realized by using the flexibility and thermal insulation of the flexible three-dimensional fiber substrate, and the good electrical conductivity of the PEDO: PSS, so that simultaneous detection and effective resolution of temperature and pressure stimulation are realized. The flexible temperature-pressure sensor provided by the invention has the advantages of good flexibility, high thermoelectric figure of merit, simple preparation process and capability of realizing large-scale production, and can be made into clothes tobe applied to the field of wearable electronic devices.

Description

technical field [0001] The invention belongs to the technical field of sensing materials, in particular to a flexible temperature-pressure sensor and its preparation method and application. Background technique [0002] With the development of artificial intelligence, health monitoring and human body restoration technology, the development of electronic skin that can imitate the function of human skin, obtain external environmental information and interact with it has become a research hotspot. Due to the complexity of external stimuli, it has multiple sensing functions, and being able to perceive and distinguish multiple stimuli simultaneously has become one of the most important problems to be solved in the development of electronic skin. The multi-sensing function of electronic skin refers to the ability to perceive multiple stimuli in the external environment at the same time and convert them into electronic signals for output. The perception of mechanical and temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02G01L1/22H02N11/00
CPCG01K7/02G01L1/22H02N11/002
Inventor 李沐芳王栋陈佳鑫钟卫兵曾凡佳邓璐瑶蒋海青
Owner WUHAN TEXTILE UNIV
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