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Sensors, methods of making the same, and methods of using the sensors

A sensor and hydrogel technology, applied in the field of sensors and their preparation, can solve the problems of low induction performance and sensitivity, and achieve the effect of small working voltage

Active Publication Date: 2021-09-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flexible pressure sensor requires a large pressure to be applied to the elastic body, therefore, the flexible pressure sensor has low sensing performance and sensitivity

Method used

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  • Sensors, methods of making the same, and methods of using the sensors
  • Sensors, methods of making the same, and methods of using the sensors
  • Sensors, methods of making the same, and methods of using the sensors

Examples

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preparation example Construction

[0049] See Figure 1-3 , the embodiment of the present invention provides a method for preparing a hydrogel composite 20, comprising the following steps:

[0050] S11. Mix and dissolve the polymer monomer, cross-linking agent, photoinitiator and monovalent silver ion salt in water to obtain a mixed solution. The polymer monomer, cross-linking agent, photoinitiator, monovalent silver ion salt The molar ratio of ionic salt to water is (1300-13300): (60-830): (1-500): (160-50000): 92500;

[0051] S12. Put the mixed solution into a mold 10, the mold 10 has opposite first inner surface 120 and second inner surface 140, the surface roughness of the first inner surface 120 and second inner surface 140 is not same;

[0052] S13, using ultraviolet light to irradiate the mixed solution put into the mold 10 for more than 6 hours to obtain a hydrogel composite 20; and

[0053] S14 , separating the hydrogel composite 20 from the mold 10 .

[0054] In step S11 , the polymer monomer, cro...

specific Embodiment 1

[0071] Step 1: Mix and dissolve polymer monomer, crosslinking agent, photoinitiator and monovalent silver ion salt in water, the mole of polymer monomer, crosslinking agent, photoinitiator, monovalent silver ion salt and water The ratio is 6600:320:3:16000:92500, the polymer monomer is acrylic acid, the crosslinking agent is N,N'-methylenebisacrylamide, the photoinitiator is α-ketoglutaric acid, and monovalent silver ions The salt is silver nitrate; step 2: add the uniformly mixed solution in step 1 into the quartz mold 10 and place it under ultraviolet light for 8 hours to obtain silver nanoparticles 26-hydrogel composite 20 in one step; step 3: use conductive copper Foil and aluminum foil are pasted on the surface of the silver nanoparticle 26-hydrogel composite 20 obtained in step 2 as electrodes, the copper foil and aluminum foil are respectively connected to the negative and positive electrodes of the external power supply, and then packaged with plastic film and ITO film ...

specific Embodiment 2

[0073] Step 1: Mix and dissolve polymer monomer, crosslinking agent, photoinitiator and monovalent silver ion salt in water, the mole of polymer monomer, crosslinking agent, photoinitiator, monovalent silver ion salt and water The ratio is 3300:160:3:16000:92500, the polymer monomer is acrylamide, the crosslinking agent is N,N'-methylenebisacrylamide, the photoinitiator is α-ketoglutaric acid, monovalent silver The ionic salt is silver nitrate; step 2: add the uniformly mixed solution in step 1 into the quartz mold 10 and place it under ultraviolet light for 7 hours to obtain silver nanoparticles 26-hydrogel composite 20 in one step; step 3: use conductive Copper foil and aluminum foil are pasted on the surface of the silver nanoparticles 26-hydrogel composite 20 obtained in step 2 as electrodes, and the copper foil and aluminum foil are respectively connected to the negative and positive electrodes of the external power supply, and then packaged with plastic film and PDMS film...

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Abstract

A method for preparing a sensor, comprising the following steps: setting a polymer monomer, a crosslinking agent, a photoinitiator and a monovalent silver ion salt in water to obtain a mixed solution; putting the mixed solution into a mold , the mold has a first inner surface and a second inner surface opposite, and the surface roughness of the first inner surface and the second inner surface is different; the mixed solution put into the mold is irradiated with ultraviolet light to obtain a A hydrogel composite, the hydrogel composite has an opposite first surface and a second surface, and the surface roughness of the first surface and the second surface is different; the hydrogel composite and separating the mold; and bringing the first surface into contact with a first electrode and the second surface into contact with a second electrode. The invention also relates to the sensor prepared by the preparation method and the use method of the sensor.

Description

technical field [0001] The invention relates to the technical field of flexible pressure sensing, in particular to a sensor, a preparation method thereof, and a use method of the sensor. Background technique [0002] Recently there has been an increasing demand for real-time health monitoring, wearable displays, bionic prosthetics and humanoid robotics. Among them, flexible pressure sensing technology has attracted great attention from researchers in the fields of electronics, mechanics, materials science, robotics and bioengineering. In the current research, compared with the flexible stretch sensor, the flexible pressure sensor has low sensitivity, but its way of sensing force is similar to that of the skin, and plays an important role in the fields of artificial intelligence applications, mobile monitoring and remote medical diagnosis. [0003] A flexible pressure sensor generally includes a conductor and an elastic body, and when the elastic body is pressed, the electri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08F220/06C08F222/38C08F220/56C08F228/02C08F212/14C08F230/02C08F2/48C08K3/08G01L1/16G01L9/08
CPCC08F2/48C08F212/14C08F220/06C08F220/56C08F228/02C08F230/02C08J3/075C08J2325/18C08J2333/02C08J2333/26C08J2341/00C08J2343/02C08K2003/0806C08K2201/011G01L1/16G01L9/08C08F222/385
Inventor 刘锴丁翰元
Owner TSINGHUA UNIV
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