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Preparation method of washable and wearable high-sensitivity pressure sensor

A pressure sensor, capacitive technology, applied in nanotechnology for sensing, fluid pressure measurement using capacitance changes, instruments, etc., can solve the problems of low sensitivity and cumbersome preparation steps of capacitive pressure sensors, and achieve medium Regular and uniform electrical layer, simple process and fast response

Inactive Publication Date: 2020-03-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of a washable and wearable high-sensitivity flexible capacitive pressure sensor, so as to overcome the defects of low sensitivity and cumbersome preparation steps of the capacitive pressure sensor in the prior art

Method used

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  • Preparation method of washable and wearable high-sensitivity pressure sensor
  • Preparation method of washable and wearable high-sensitivity pressure sensor
  • Preparation method of washable and wearable high-sensitivity pressure sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Take 0.17mgPdCl 2 Prepare a 1.7ppm solution with 100ml of DMF, then take 0.8g of PAN powder and dissolve it in 10ml of palladium solution to obtain a spinning solution, add the spinning solution into the syringe, set certain spinning parameters for spinning, and set the diameter of the nozzle 0.67mm, the receiving distance is 15cm, the advancing speed is 6.5ml / h, the applied voltage is 18kv, and the electrospinning time is 10h to obtain the nanofiber membrane.

[0032] (2) Dissolve 1.5 g of glucose and 60 mg of polyethylene glycol with 3 ml of ethanol and 47 ml of deionized water to prepare 50 ml of reducing solution. With 0.8g silver nitrate (AgNO 3 ) and deionized water to configure 8g / L AgNO 3 solution, add ammonia water (about 0.6ml) dropwise until the solution becomes clear from turbidity to obtain a silver ammonia solution, and then add 1ml of ethylenediamine. First immerse the nanofiber membrane into the reducing solution, then quickly pour it into the sil...

Embodiment 2

[0035] According to Example 1, the time of electroless plating under ultrasound in step (2) of Example 1 was changed to 30 minutes, and the rest were the same as in Example 1 to obtain a capacitive pressure sensor. Test the capacitance value of the sensor, and calculate the sensitivity through the sensitivity S=dΔC / dP, and the sensitivity is shown in Table 1.

Embodiment 3

[0037] The electrodes and dielectric layer of the capacitive pressure sensor in Example 1 were disassembled and washed with water, first ultrasonically washed for 2 minutes, then dried, and cycled 10 times, and then assembled according to Example 1 to obtain a capacitive pressure sensor. The capacitance value of the sensor was tested, the sensitivity was calculated by the sensitivity S=dΔC / dP, and the performance change after washing was detected as shown in Table 1.

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Abstract

The invention relates to a preparation method of a washable and wearable high-sensitivity pressure sensor. The method comprises the steps of carrying out electrostatic spinning on a spinning solutioncontaining a palladium source and PAN, and then carrying out chemical silver plating; and taking an obtained conductive nanofiber membrane electrode as an upper layer and a lower layer, connecting a wire, taking the middle layer as a dielectric layer, and packaging. The sensor is wearable and still has high sensitivity after being washed with water. The method is simple in process, and the obtained sensor is wearable, still has high sensitivity after being washed with water, is light, thin and flexible, is high in precision and high in fatigue resistance, and plays an important role in the field of artificial intelligence.

Description

technical field [0001] The invention belongs to the field of pressure sensor preparation, in particular to a preparation method of a washable and wearable high-sensitivity pressure sensor. Background technique [0002] With the improvement of the level of science and technology, sensors play an important role in the future development of artificial intelligence. Through nanotechnology and flexible electronic technology, people have realized the development of pressure sensors in the direction of being bendable, wearable and washable, and the flexibility of sensors has gradually become the development trend. Trends and directions have many applications in medical health, human skill detection, real-time feedback, etc. [0003] Pressure sensors are generally divided into three types: resistive pressure sensors, piezoelectric pressure sensors, and capacitive pressure sensors. Among them, capacitive pressure sensors respond to changes in capacitance caused by changes in external...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14G01L9/12C23C18/44D01D5/00B82Y15/00B82Y30/00B82Y40/00
CPCB82Y15/00B82Y30/00B82Y40/00C23C18/44D01D5/003D01D5/0069G01L1/142G01L9/12
Inventor 陈奕翔俞丹王炜王泽鸿
Owner DONGHUA UNIV
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