Dendritic nano silver structure-based flexible film pressure sensor and preparation method thereof

A technology of pressure sensor and flexible thin film, which is applied in the direction of sensor, fluid pressure measurement by changing ohmic resistance, and measurement of property and force of piezoelectric resistance material, which can solve the problem of low sensitivity, achieve excellent electrical conductivity and excellent preparation process Simple, good bending resistance effect

Inactive Publication Date: 2019-01-25
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the low sensitivity of the prepared material in the lower load range

Method used

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  • Dendritic nano silver structure-based flexible film pressure sensor and preparation method thereof
  • Dendritic nano silver structure-based flexible film pressure sensor and preparation method thereof
  • Dendritic nano silver structure-based flexible film pressure sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The ITO glass is self-assembled for 6 layers, and the ITO glass needs to be cleaned before assembly. The cleaning process is to ultrasonically clean the ITO glass with deionized water, acetone and ethanol for 30 minutes. After cleaning, put it in an ozone cleaner for surface hydroxylation. Then the ITO glass is self-assembled layer by layer in PDDA and PSS solution.

[0025] To deposit dendritic nano silver on the assembled ITO glass, the method used is chronoamperometry. The reference electrode is a saturated mercury sulfate electrode, the counter electrode is a platinum wire, the working electrode is an assembled ITO glass, and the electrolyte is AgNO 3 And NaNO 3 Mixed solution, deposition time is 1600s, AgNO 3 The concentration is 0.01mol / L, NaNO 3 The concentration is 0.1mol / L, and the set potential is -0.3V. Through electrochemical deposition, a white nano-silver conductive layer is prepared on the surface of ITO glass.

[0026] Put the deposited silver ITO glass in...

Embodiment 2

[0029] The ITO glass is self-assembled for 6 layers, and the ITO glass needs to be cleaned before assembly. The cleaning process is to ultrasonically clean the ITO glass with deionized water, acetone and ethanol for 30 minutes. After cleaning, put it in an ozone cleaner for surface hydroxylation. Then the ITO glass is self-assembled layer by layer in PDDA and PSS solution.

[0030] The dendritic nano silver is deposited on the assembled ITO glass. The method used is chronoamperometry. The reference electrode is a saturated mercury sulfate electrode, the counter electrode is a platinum wire, the working electrode is an assembled ITO glass, and the electrolyte is AgNO 3 And NaNO 3 Mixed solution, deposition time is 1600s, AgNO 3 The concentration is 0.01mol / L, NaNO 3 The concentration is 0.1mol / L, and the set potential is -0.3V. Through electrochemical deposition, a white nano-silver conductive layer is prepared on the surface of ITO glass.

[0031] Put the deposited silver ITO gl...

Embodiment 3

[0034] The ITO glass is self-assembled for 6 layers, and the ITO glass needs to be cleaned before assembly. The cleaning process is to ultrasonically clean the ITO glass with deionized water, acetone and ethanol for 30 minutes. After cleaning, put it in an ozone cleaning machine for surface hydroxylation. Then the ITO glass is self-assembled layer by layer in PDDA and PSS solution.

[0035] Deposit dendritic nano silver on the assembled ITO glass. The method used is chronoamperometry. The reference electrode is a saturated mercury sulfate electrode, the counter electrode is a platinum wire, the working electrode is an assembled ITO glass, and the electrolyte is AgNO 3 And NaNO 3 Mixed solution, deposition time is 1600s, AgNO 3 The concentration is 0.01mol / L, NaNO 3 The concentration is 0.1mol / L, and the set potential is -0.3V. Through electrochemical deposition, a white nano-silver conductive layer is prepared on the surface of ITO glass.

[0036] Put the silver deposited ITO gl...

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Abstract

The invention relates to a dendritic nano silver structure-based flexible film pressure sensor and a preparation method thereof and belongs to the technical field of electronic materials. According tothe technical schemes of the invention, the preparation method of the dendritic nano silver structure-based flexible film pressure sensor includes the following steps that: the self-assembly of ITO glass layers is realized, electrochemical silver deposition is performed on assembled ITO glass through chronoamperometry, and a white dendritic nano-silver layer is deposited on the ITO glass after the electrochemical deposition is performed, and the ITO glass with the white dendritic nano-silver layer is called ITO-Ag; and the ITO-Ag is immersed in a curing agent-containing PDMS solution, heatingand curing are performed, and a cured PDMS flexible substrate is removed from the ITO-Ag, so that the dendritic nano silver structure-based flexible film pressure sensor can be obtained. The dendritic nano silver structure-based flexible film pressure sensor prepared by the method of the invention has low square resistance and can maintain good electrical conductivity after being bent a pluralityof times and stretched with different ratios. The sensor can monitor human body health basic data online for a wearable smart device, and provide trial conditions in the aspects of pulse, blood pressure, and heartbeat.

Description

Technical field [0001] The invention relates to a flexible film pressure sensor based on a dendritic nano silver structure and a preparation method thereof, and belongs to the technical field of electronic materials. Background technique [0002] The pressure sensor can provide the ability to measure pressure changes, and should have the advantages of low-pressure range response sensitivity, small size, low power, and good performance. It is mass-produced in the micro-machining process. Pressure sensors are one of the most widely used sensors on the market. It is worth noting that pressure sensors have a variety of applications, such as micro-mechatronics systems, automobiles, process control, etc. Among them, the application of flexible pressure sensors in wearable biomedical testing equipment has attracted increasing attention from the scientific community. [0003] Flexible pressure sensors have many advantages, such as excellent flexibility, low cost, compatibility and so on....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L9/06G01L1/18A61B5/00
CPCA61B5/6801G01L1/18G01L9/06
Inventor 孙晶王清翔罗刚刘士伟
Owner DALIAN UNIV
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