Flexible sensing layer, preparation method of flexible sensor and flexible sensor

A flexible sensor and sensing layer technology, applied in the field of sensors, can solve the problems of low sensing sensitivity of the sensing layer, mutual interference between resistance and pyroelectric voltage signals, etc., so as to improve the carrier concentration, improve the Seebeck coefficient, and increase the internal Effect of contact area

Pending Publication Date: 2022-03-18
NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the invention is how to improve the low sensitivity of the sensing layer and the mutual interference of resistance and thermoelectric voltage signals

Method used

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  • Flexible sensing layer, preparation method of flexible sensor and flexible sensor
  • Flexible sensing layer, preparation method of flexible sensor and flexible sensor
  • Flexible sensing layer, preparation method of flexible sensor and flexible sensor

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preparation example Construction

[0037] Such as figure 1 As shown, the embodiment of the present invention provides a method for preparing a flexible sensing layer, comprising the following steps:

[0038] Step S1: using 3D printing technology to prepare a flexible sensing layer substrate with a multi-level sub-pore structure;

[0039] Step S2: adding a thermoelectric material coating on the surface of the flexible sensing layer substrate;

[0040] Step S3: performing plasma treatment on the surface of the thermoelectric material coating to obtain a flexible sensing layer 2 .

[0041] The embodiment of the present invention uses 3D printing technology to prepare a flexible sensing layer matrix with a multi-level sub-pore structure, and increases the internal contact area of ​​the flexible sensing layer matrix with a multi-level sub-pore structure under the action of pressure, thereby increasing the resistance. The range of change increases the pressure sensitivity of the flexible sensing layer 2; the temper...

Embodiment 1

[0075] The preparation method of the flexible sensing layer 2 in this embodiment is as follows:

[0076] First, mix degradable thermoplastic polyurethane and ethanol at a mass ratio of 1:1, then add carbon nanofibers with a mass ratio of 1:100 to thermoplastic polyurethane and 50 carbon nanofibers with a mass ratio of 4.5:1 to thermoplastic polyurethane. Micron salt particles, ie NaCl particles, were stirred and debubbled for 5 minutes at a rotation speed of 2000 rpm using a planetary mixing mixer to obtain a printing paste.

[0077] combine figure 2 and image 3 As shown, the printing paste prepared above is placed in the printing needle tube of the direct-writing printer, the inner diameter needle of 600 microns is configured, the extrusion rate is controlled at 5.6mm / s, and 4 layers of printing are stacked, and the printed 4 layers are stacked The flexible sensing layer substrate was placed in a 20°C vacuum oven for 2 hours to completely remove ethanol, and then the flex...

Embodiment 2

[0081] The preparation method of the flexible sensor in this embodiment includes the flexible sensing layer 2 described in Embodiment 1, specifically as follows:

[0082] Disperse 0.08g of nano-silver flakes with a diameter of 5 microns in 20ml of ethanol, use an ultrasonic probe to treat it at a power of 100W for 10 minutes, pour it into a suction filter container, and use polyvinylidene fluoride with a pore size of 0.22 microns and a diameter of 50 mm The filter membrane was filtered by a circulating vacuum pump, and the filtered filter membrane was placed in a vacuum oven at 20° C. and dried for 1 hour.

[0083] A degradable thermoplastic polyurethane film with a thickness of 120 microns was prepared on a glass plate by a doctor blade method, and placed in a vacuum oven at 120° C. for 30 minutes to make the thermoplastic polyurethane film reach a semi-cured state.

[0084] Put the nano-silver sheet / polyvinylidene fluoride film with the nano-silver sheet on the surface of the ...

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Abstract

The invention provides a flexible sensing layer, a preparation method of a flexible sensor and the flexible sensor, and relates to the technical field of sensors, and the preparation method of the flexible sensing layer comprises the following steps: preparing a flexible sensing layer matrix with a multi-stage pore structure by using a 3D printing technology; a thermoelectric material coating is additionally arranged on the surface of the flexible sensing layer substrate; and performing plasma treatment on the surface of the thermoelectric material coating to obtain the flexible sensing layer. According to the invention, the internal contact area in a pressure state is changed through the flexible sensing layer substrate with the multi-stage secondary pore structure, the variation amplitude of resistance is influenced, and the pressure sensitivity of the flexible sensing layer is improved; the thermoelectric material coating is additionally arranged, so that the temperature resistance effect is reduced, and signal crosstalk between resistance and thermoelectric voltage signals is reduced; the surface of the thermoelectric material coating is subjected to plasma treatment, so that the carrier concentration is improved, the Seebeck coefficient is further improved, and the effect of improving the temperature sensitivity of the sensor is achieved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a flexible sensing layer, a preparation method of a flexible sensor and a flexible sensor. Background technique [0002] Sensor technology is widely used in scientific research and development and industrial production, and plays an important role in economic development and social progress. Among them, flexible multifunctional sensors for combined measurement of parameters such as pressure, strain, temperature, and humidity have received great attention in the past few years. Widely concerned, among these multifunctional sensors, flexible pressure-temperature sensors have been widely used in flexible wearable fields and artificial intelligence due to their superior sensing capabilities and sensitivity. [0003] Existing flexible pressure-temperature sensors are generally composed of two parts: a sensing layer and an electrode. Its working principle is to use the sensing layer to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18G01L1/26G01K7/02B29C64/10B33Y10/00
CPCG01L1/18G01L1/26G01K7/02B29C64/10B33Y10/00
Inventor 朱光尹亦铭
Owner NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD
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