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Wearable flexible stress sensor and preparation method and application thereof

A stress sensor, flexible technology, applied in applications, instruments, measuring force, etc., can solve problems such as troublesome steps, pollution, and high consumption, and achieve the effects of easy detection, high sensitivity, and low cost

Pending Publication Date: 2019-01-18
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses methods such as acid corrosion method and evaporation silver plating method, which consume too much and are troublesome and accompanied by pollution.

Method used

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  • Wearable flexible stress sensor and preparation method and application thereof
  • Wearable flexible stress sensor and preparation method and application thereof
  • Wearable flexible stress sensor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Weigh 0.2g of graphene oxide with a sheet size of about 1-2µm prepared by a chemical method (improved Hummers method) and place it in a beaker, add 100ml of deionized water, and ultrasonically (power 700W) for 30 minutes to obtain 2mg / ml Graphene oxide dispersion, with 1mol / L NaHCO 3 The solution adjusts the pH value of the graphene oxide dispersion to 6.5. Weigh 0.1 g of dopamine into a beaker, add 10 mL of buffer (trishydroxymethylaminomethane), and stir for 5 minutes to obtain a 10 mg / mL polydopamine aqueous solution. Take 10 mL of graphene oxide dispersion and mix with 0.14 mL of polydopamine aqueous solution, and stir for 24 hours. Take 0.26g of nickel chloride into 100mL of deionized water, and stir evenly. Take 0.054mL nickel chloride aqueous solution in the mixture, stir for 4 hours.

[0063] (2) Weigh 8mL silver nanowire (length 5µm, diameter 30-40nm) dispersion (10 mg / ml) into the reagent bottle, add 5mL graphene oxide, dopamine and nickel chloride mixe...

Embodiment 2

[0068] (1) Weigh 0.2g of MXene(Ti 3 C 2 X) Place in a beaker, add 100ml of deionized water, and sonicate for 30 minutes to obtain a 2mg / ml Mxene dispersion. Weigh 0.1 g of dopamine into a beaker, add 10 mL of buffer solution, and stir for 5 minutes to obtain a 10 mg / mL polydopamine aqueous solution. Take 10 mL of graphene oxide dispersion and mix with 0.14 mL of polydopamine aqueous solution, and stir for 24 hours. Take 0.26g of nickel chloride into 100mL of deionized water, and stir evenly. Take 0.054mL nickel chloride aqueous solution in the mixture, stir for 4 hours.

[0069] (2) Weigh 8mL silver nanowire (length 5µm, diameter 30-40nm) dispersion (10 mg / ml) into the reagent bottle, add 5mL Mxene(Ti 3 C 2 X) Mix the solution with dopamine and nickel chloride, and redisperse it by ultrasonic vibration treatment. Suction filter with a microporous membrane, wash with deionized water several times, and suck off the supernatant to obtain a uniform dispersion containing silv...

Embodiment 3

[0074]1) Weigh 0.2g of graphene oxide with a sheet size of about 1-2µm prepared by a chemical method and place it in a beaker, add 100ml of deionized water, and ultrasonicate for 30 minutes to obtain a 2mg / ml graphene oxide dispersion. Weigh 0.1 g of dopamine into a beaker, add 10 mL of buffer solution, and stir for 5 minutes to obtain a 10 mg / mL polydopamine aqueous solution. Take 10 mL of graphene oxide dispersion and mix with 0.14 mL of polydopamine aqueous solution, and stir for 24 hours. Take 0.26g of calcium chloride into 100mL of deionized water, and stir evenly. Take 0.054mL nickel chloride aqueous solution in the mixture, stir for 4 hours.

[0075] (2) Weigh 8mL copper nanowire (5µm in length, 30-40nm in diameter) dispersion (10 mg / ml) into a reagent bottle, add 5mL of Yanniplan graphene, dopamine and nickel chloride obtained in step (1) Mix the solution and sonicate it to redisperse it. Suction filter with a microporous membrane, wash with deionized water several ...

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Abstract

The invention relates to a wearable flexible stress sensor and a preparation method and application thereof. Firstly, functional ink suitable for screen printing is prepared, and is printed on a wearable substrate through a screen printing method, and the stress sensor of a desired specification is produced. The stress sensor is used for monitoring physical deformation of stretching, bending, touching and the like from small ranges to large ranges, and has multiple application in the electronic skin fields and the biomedical application fields of human skins, expressions, pulses, heartbeats and the like, the human-computer interaction fields and the fields of virtual reality, entertainment technology and the like. The flexible stress sensor of the invention has the following advantages that the sensor has excellent stretching elasticity, and stretching strain can reach 100%; sensitivity is extremely high, and a sensitivity parameter (Gauge Factor) can be up to 8000 or more; linear relationships of working curves are excellent, stretching repeatability is good, and a stretching cycle lag is small; and a preparation process is simple, costs are low, massive integrated-device preparation is suitable, and application prospects are wide.

Description

technical field [0001] The invention relates to a wearable flexible stress sensor and its preparation method and application, in particular to a wearable stress sensor with high sensitivity and large deformation based on a printing method and its preparation method and application. It is mainly used to monitor physical deformations ranging from small to large, such as stretching, bending, touching, etc. There are many applications in the fields of human joints, expressions, pulse, heartbeat and other electronic skin and biomedical applications, human-computer interaction, virtual reality and entertainment technology. Background technique [0002] Wearable mechanical sensors hold great promise due to their wide range of applications. As a mechanical sensor with good performance, it needs to meet many requirements such as: high sensitivity, large stretchability, fast response speed, good stability, low preparation cost and batch preparation, etc. [0003] If the stretch sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/20C09D11/52
CPCC09D11/52G01L1/20
Inventor 梁嘉杰史鑫磊
Owner NANKAI UNIV
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