A kind of flexible wearable strain sensor and preparation method thereof

A strain sensor and wearable technology, applied in the field of flexible wearable strain sensor and its preparation, can solve the problems of unstable sensor function and short service life, achieve good mechanical adaptability, increase added value, and improve electrical conductivity Effect

Active Publication Date: 2021-04-16
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a flexible and wearable strain sensor and its preparation method, which solves the problems of unstable function and short service life of existing sensors

Method used

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  • A kind of flexible wearable strain sensor and preparation method thereof
  • A kind of flexible wearable strain sensor and preparation method thereof
  • A kind of flexible wearable strain sensor and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of the flexible wearable strain sensor of this embodiment comprises the following steps:

[0031] (1) Dissolve graphene oxide in dimethylformamide (DMF) solution, and perform strong ultrasonic treatment under sealed conditions to obtain a uniformly dispersed graphene oxide solution;

[0032] (2) Add dry polyacrylonitrile powder to the solution in step (1), stir at 80°C for 3 hours to obtain a spinning solution with a mass fraction of polyacrylonitrile of 10%, and the molecular weight of the polyacrylonitrile is 150000; the mass ratio of polyacrylonitrile to graphene oxide is 1:0.01;

[0033] (3) Build the electrospinning device according to Figure 1, add the spinning solution in step (2) to the syringe pump to prepare continuous nanofiber yarn, the electrospinning voltage is 20 kV, and the total flow rate of the spinning solution is 0.8 mL / h, the distance between the positive and negative needles is 15 cm, the number of needles is 4, the solution...

Embodiment 2

[0040]The preparation method of the flexible wearable strain sensor of this embodiment comprises the following steps:

[0041] (1) Dissolve graphene oxide in dimethylformamide (DMF) solution, and perform strong ultrasonic treatment under sealed conditions to obtain a uniformly dispersed graphene oxide solution;

[0042] (2) Add dry polyacrylonitrile powder to the solution in step (1), stir at 50°C for 6 hours to obtain a spinning solution with a mass fraction of polyacrylonitrile of 8%, and the molecular weight of the polyacrylonitrile is 100000, the mass ratio of polyacrylonitrile to graphene oxide is 1:0.03;

[0043] (3) Build the electrospinning device according to Figure 1, add the spinning solution in step (2) to the syringe pump to prepare continuous nanofiber yarn, the electrospinning voltage is 17 kV, and the total flow rate of the spinning solution is 0.5 mL / h, the distance between the positive and negative needles is 17 cm, the number of needles is 4, the solution f...

Embodiment 3

[0049] The preparation method of the flexible wearable strain sensor of this embodiment comprises the following steps:

[0050] (1) Add the dry polyacrylonitrile powder into the dimethylformamide solution, stir at 60°C for 4 hours, and obtain a polyacrylonitrile solution with a mass fraction of 12% as the spinning solution. The polyacrylonitrile The molecular weight is 150000;

[0051] (2) Build the electrospinning device according to Figure 1, add the polyacrylonitrile solution in step (1) to the syringe pump to prepare continuous nanofiber yarn, the electrospinning voltage is 20 kV, and the total flow rate of the spinning solution is 0.8 mL / h, the distance between the positive and negative needles is 15 cm, the number of needles is 4, the positive and negative needle solution flow ratio is 1:0.7, the vertical distance between the needle and the edge of the bell mouth is 4 cm, and the winding speed is 35 mm / min;

[0052] (3) Soak the nanofiber yarn prepared in step (2) in fe...

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Abstract

The invention relates to the technical field of flexible electronics and sensors, in particular to a flexible wearable strain sensor and a preparation method thereof. The sensor includes two intersecting helical composite yarns, one end of each helical composite yarn is pasted with a copper tape, and the two copper tapes are respectively connected to copper wires, and the upper and lower sides of the two intersecting helical composite yarns are pasted PDMS elastic film; the length of the sensor is not less than 35mm. The strain sensor prepared by the invention has good mechanical adaptability and high sensitivity, can realize a real wearable sensor, has innovative structure, simple manufacturing process, low cost and easy operation.

Description

technical field [0001] The invention relates to the technical field of flexible electronics and sensors, in particular to a flexible wearable strain sensor and a preparation method thereof. Background technique [0002] With the popularity of smart terminals, wearable electronic devices present a huge market prospect. Sensors play a vital role in human health monitoring, and flexible wearable electronic sensors have the characteristics of thinness and portability, excellent electrical performance and high integration, and can monitor human health such as pulse, heartbeat, body temperature, and muscle group vibration in real time. Physiological indicators, timely feedback on changes in human health data, and even early prevention and diagnosis of diseases, making it one of the most concerned electrical sensors. A large number of strain sensors with specially designed structures have been developed, but such complex designs lead to exponential difficulties in fabrication tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D11/00D02G3/04D02G3/36
CPCD02G3/04D02G3/36G01D11/00
Inventor 何建新南楠刘凡邵伟力崔世忠强荣于书淳王芳芳
Owner ZHONGYUAN ENGINEERING COLLEGE
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