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High-linearity conductive coating sponge piezoresistive sensor and preparation method thereof

A piezoresistive sensor and conductive coating technology, applied in the field of conductive coating sponge piezoresistive sensors and their preparation, can solve problems such as poor sensor linearity, achieve good coating stability, high linearity sensitivity, and avoid coating peeling off effect of risk

Pending Publication Date: 2022-03-18
EAST CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a simple dip-coating method to prepare a high-linearity sensor for the problem of poor sensor linearity of the existing piezoresistive sponge sensor

Method used

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  • High-linearity conductive coating sponge piezoresistive sensor and preparation method thereof
  • High-linearity conductive coating sponge piezoresistive sensor and preparation method thereof
  • High-linearity conductive coating sponge piezoresistive sensor and preparation method thereof

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Embodiment 1

[0029] In step (1), select a porosity of 85% and a density of 0.118 g / cm 3 Put the polyurethane sponge in deionized water for 10 minutes, take it out and dry it at 60°C for 1 hour, then put the sponge in ethanol and ultrasonically clean it for 10 minutes, take it out and dry it at 60°C for 30 minutes, and wash it Polyurethane sponge cut into small pieces of 1 cm×1 cm×1 cm;

[0030] Step (2), magnetically stir the polyethylene oxide aqueous solution with a mass fraction of 3% at 60°C for 2 hours to completely dissolve the polyethylene oxide. After cooling to room temperature, add lithium chloride at a mass fraction of 20%, and magnetically stir again 2h mixed uniformly to obtain polyoxyethylene-lithium chloride aqueous solution;

[0031] Step (3), put the small piece of polyurethane sponge prepared in step (1) into a plasma generating device, treat it with oxygen plasma for 1 min, and then immerse it in the polyethylene oxide-lithium chloride aqueous solution prepared in step ...

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Abstract

The invention discloses a preparation method of a high-linearity conductive coating sponge piezoresistive sensor. The preparation process of the sensor comprises the following steps: cleaning and drying the polymer sponge, immersing the polymer sponge into an aqueous solution of polyoxyethylene-lithium salt, extruding out the excess solution in the sponge, drying the sponge, completing the assembly of the sensor through the coating of the conductive silver paste and the adhesion of the flexible electrode, and finally, sub-packaging the sensor by using a medical adhesive tape and a polyethylene film. The pressure sensor prepared by the invention has high-linearity signal sensing capability in a large pressure range, and can be applied to detection equipment for human joint movement.

Description

technical field [0001] The invention belongs to the field of flexible electronic sensing and relates to the preparation of piezoresistive sensors, in particular to a highly linear conductive coating sponge piezoresistive sensor and a preparation method thereof. Background technique [0002] Pressure, as a common sensing physical quantity, the preparation and application of pressure sensors has attracted extensive attention of researchers. Pressure sensors can be classified into piezoresistive, piezoelectric, capacitive and triboelectric by sensing mechanism. Among them, piezoresistive sensors have high commercial value because of their relatively simple preparation process and easy detection of signals. [0003] As people continue to explore the fields of electronic skin and wearable devices, the requirements for the flexibility of sensors are gradually increasing. Conventional commercial piezoresistive sensors, such as silicon-based piezoresistive sensors, often have the ...

Claims

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Application Information

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IPC IPC(8): G01L1/18
CPCG01L1/18
Inventor 沈俊浩左少华石富文江锦春
Owner EAST CHINA NORMAL UNIVERSITY
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