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Preparation method of wearable transparent flexible film type strain sensor

A technology of strain sensor and flexible film, which is applied in the measurement of the property force of piezoelectric resistance materials, the manufacture of microstructure devices, and the technology for producing decorative surface effects, etc. It can solve the problem of complex device structure, poor concealment, and high cost. problems, achieve the effect of low conductive seepage threshold, excellent conductivity, and good concealment

Pending Publication Date: 2020-05-12
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high percolation threshold of the conductive material used in the existing strain sensor or the complex structure of the device, the sensing sensitivity is low, and it is impossible to detect weak signals such as human physiology, motion status and physical signs effectively and conveniently in real time; strain sensors usually Does not have transparent characteristics, poor concealment, and reduces the wearable effect
In addition, the existing strain gauge sensors also have practical problems such as high cost and complicated process.

Method used

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  • Preparation method of wearable transparent flexible film type strain sensor
  • Preparation method of wearable transparent flexible film type strain sensor
  • Preparation method of wearable transparent flexible film type strain sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Dilute the AgNWs dispersion with a concentration of 10mg / mL to 1.0mg / mL and stir until uniform;

[0023] b. Ultrasonic cleaning the polyethylene terephthalate (PET) substrate with deionized water, ethanol and isopropanol for 10 minutes respectively, and drying with an argon gun;

[0024] c. Spin-coat polydimethylsiloxane (PDMS) on the cleaned PET substrate, and cure at 60°C for 120 minutes;

[0025] d. Add 1.0mg / mL Ti 3 C 2 T x The MXene dispersion was sprayed onto the surface of the PDMS film (the spraying time was 5s), and then dried at 65°C;

[0026] e. Then spray 1.0 mg / mL AgNWs dispersion on the surface of PDMS film, and then dry at 65 °C;

[0027] f. The dried sample was peeled off from the PET substrate to obtain AgNWs / Ti 3 C 2 T x MXene-based transparent flexible conductive film;

[0028] g. On AgNWs / Ti 3 C 2 T x The two ends of the MXene-based transparent flexible conductive film are made of metal electrodes (such as magnetron sputtering silver...

Embodiment 2

[0031] a. Dilute the AgNWs dispersion with a concentration of 10mg / mL to 2.0mg / mL and stir until uniform;

[0032] b. Ultrasonic clean the PET substrate with deionized water, ethanol and isopropanol for 10 minutes, and dry it with an argon gun;

[0033] c. Spin-coat PDMS onto the cleaned PET substrate and cure at 65°C for 100 minutes;

[0034] d. Add 1.25mg / mL Ti 3 C 2 T xThe MXene dispersion was sprayed onto the surface of the PDMS film (the spraying time was 10s), and then dried at 70°C;

[0035] e. Spin-coat the 2.0 mg / mL AgNWs dispersion on the surface of the PDMS film, and then dry it at 70 °C;

[0036] f. The dried sample was peeled off from the PET substrate to obtain AgNWs / Ti 3 C 2 T x MXene-based transparent flexible conductive film;

[0037] g in AgNWs / Ti 3 C 2 T x Metal electrodes (such as magnetron sputtering silver electrode method, thermal evaporation silver electrode method, drop-coating conductive polymer method, pasting copper tape method, smearin...

Embodiment 3

[0040] a. Dilute the AgNWs dispersion with a concentration of 10mg / mL to 3.0mg / mL and stir until uniform;

[0041] b. Ultrasonic clean the PET substrate with deionized water, ethanol and isopropanol for 10 minutes, and dry it with an argon gun;

[0042] c. Spin-coat PDMS onto the cleaned PET substrate and cure at 70°C for 80 minutes;

[0043] d. Add 1.5mg / mL Ti 3 C 2 T x The MXene dispersion was sprayed onto the surface of the PDMS film (spraying time was 15s), and then dried at 75°C;

[0044] e. Spin-coat the 3.0 mg / mL AgNWs dispersion on the surface of the PDMS film, and then dry it at 75 °C;

[0045] f. The dried sample was peeled off from the PET substrate to obtain AgNWs / Ti 3 C 2 T x MXene-based transparent flexible conductive film;

[0046] g. On AgNWs / Ti 3 C 2 T x Metal electrodes (such as magnetron sputtering silver electrode method, thermal evaporation silver electrode method, drop-coating conductive polymer method, pasting copper tape method, smearing c...

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Abstract

The invention belongs to the field of electronic device application research and relates to a preparation method of a wearable transparent flexible film type strain sensor. The method comprises the following steps that: 1, preparing raw materials; the preparation method comprises the following steps: after a polyethylene terephthalate (PET) substrate is treated with deionized water, ethanol and isopropanol, polydimethylsiloxane (PDMS) is deposited on the PET substrate and is treated, and then, Ti3C2Tx MXene dispersion liquid and silver nanowire (AgNWs) dispersion liquid are deposited on the surface of a formed polydimethylsiloxane (PDMS) film in sequence through spraying or spin-coating, and a sample is stripped from the PET substrate, and an AgNWs / Ti3C2Tx MXene / PDMS transparent flexibleconductive film can be obtained; metal electrodes are led out of the two ends of the AgNWs / Ti3C2Tx MXene / PDMS transparent flexible conductive film; and finally, a polydimethylsiloxane (PDMS) protective layer is uniformly deposited on the surface of the AgNWs / Ti3C2Tx MXene / PDMS transparent flexible conductive film, and packaging is performed, and therefore, the AgNWs / Ti3C2Tx MXene-based wearable transparent flexible film type strain sensor can be obtained. The wearable transparent flexible ultra-sensitive film type strain sensor is novel, simple and convenient, has good concealment, and does not affect appearance.

Description

technical field [0001] The invention relates to the field of electronic device application research, in particular to a preparation method of a wearable transparent and flexible thin-film strain sensor. Background technique [0002] In recent years, with the rapid development of smart electronic devices, wearable flexible electronic devices have attracted widespread attention from academia and industry due to their portability and real-time performance. At present, it has been widely used in many fields such as human-computer interaction, flexible display, digital medicine, and personalized medical monitoring. [0003] Due to the high percolation threshold of the conductive material used in the existing strain sensor or the complex structure of the device, the sensing sensitivity is low, and it is impossible to detect weak signals such as human physiology, motion status and physical signs effectively and conveniently in real time; strain sensors usually It does not have tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18B81C1/00
CPCB81C1/00158G01L1/18
Inventor 兰伟王鹏翔谢二庆
Owner LANZHOU UNIVERSITY
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