Flexible and high-telescopic nanofiber core spun yarn stress sensor with pleated structure and preparation method of stress sensor

A technology of stress sensors and nanofibers, applied in the field of flexible sensors, can solve the problems of lack of stretchability of pressure sensor arrays and large gaps between human skin, etc., and achieve the effects of wide strain range, fast response speed and good stability

Active Publication Date: 2019-03-08
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past decade, great progress has been made in the development of artificial skin based on pressure sensor arrays on flexible substrates, with high sensitivity, fast response speed, and resolutio

Method used

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  • Flexible and high-telescopic nanofiber core spun yarn stress sensor with pleated structure and preparation method of stress sensor
  • Flexible and high-telescopic nanofiber core spun yarn stress sensor with pleated structure and preparation method of stress sensor
  • Flexible and high-telescopic nanofiber core spun yarn stress sensor with pleated structure and preparation method of stress sensor

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] The preparation method of the flexible and highly stretchable nanofiber core-spun yarn stress sensor with a wrinkled structure is as follows:

[0026] (1) Dissolve polyacrylonitrile (PAN) in N,N dimethylformamide (DMF) solvent, and stir at 80°C for 6 h to obtain a PAN solution with a mass fraction of 8%;

[0027] (2) Build the electrospinning device according to Figure 1, add the PAN solution in step (1) to the syringe pump to prepare continuous nanofiber yarn, the elongation of the elastic filament is equal to 100%, and the electrospinning voltage is 17.5 kV, the total flow rate of the spinning solution is 0.6 mL / h, the diameter of the metal horn is 10 cm, the vertical distance between the metal horn and the winding device is 50 cm, the vertical distance between the nozzle and the metal horn is 4 cm, the distance between the nozzle and the metal The horizontal distance of the horn is 3 cm, the number of nozzles is 4, the inner diameter of the nozzle...

Example Embodiment

[0032] Example 2

[0033] The preparation method of the flexible and highly stretchable nanofiber core-spun yarn stress sensor with a wrinkled structure is as follows:

[0034] (1) Polyvinylidene fluoride (PVDF) was dissolved in a mixed solvent of N,N dimethylformamide (DMF) and tetrahydrofuran (mass ratio 1:1), stirred at 80°C for 6 h to obtain a mass fraction of 16.5% PVDF solution;

[0035] (2) Build the electrospinning device according to Figure 1, add the spinning solution in step (1) to the syringe pump to prepare continuous nanofiber yarn, the elongation of the elastic filament is equal to 150%, and the electrospinning The voltage was 17.5 kV, the total flow rate of the spinning solution was 0.6 mL / h, the diameter of the metal horn was 10 cm, the vertical distance between the metal horn and the winding device was 50 cm, the vertical distance between the nozzle and the metal horn was 4 cm, and the distance between the nozzle and the winding device was 50 cm. The horizo...

Example Embodiment

[0039] Example 3

[0040] The preparation method of the flexible and highly stretchable nanofiber core-spun yarn stress sensor with a wrinkled structure is as follows:

[0041] (1) Polyurethane (PU) was dissolved in a mixed solvent of N,N dimethylformamide (DMF) and tetrahydrofuran (mass ratio 1:1), and stirred at room temperature for 8 h to obtain a PU solution with a mass fraction of 12%. ;

[0042] (2) Build the electrospinning device according to Figure 1, add the spinning solution in step (1) to the syringe pump to prepare continuous nanofiber yarn, the elongation of the elastic filament is equal to 200%, and the electrospinning The voltage is 20 kV, the total flow rate of the spinning solution is 0.6 mL / h, the diameter of the metal horn is 10 cm, the vertical distance between the metal horn and the winding device is 50 cm, the vertical distance between the nozzle and the metal horn is 4 cm, the nozzle and the The horizontal distance of the metal horn is 3 cm, the numbe...

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Abstract

The invention discloses a flexible and high-telescopic nanofiber core spun yarn stress sensor with a pleated structure and a preparation method of the stress sensor. A high-performance elastic filament is used as corn yarn to serve as a high-telescopic elastic matrix, and then the elastic filament which is pre-stretched to a certain length is coated with electrostatic spinning nanofiber through aconjugate electrostatic spinning technology to prepare continuous nanofiber core spun yarn. A layer of conductive polymer polypyrrole is polymerized and coated on the surface of shell nanofiber of thecore spun yarn through an in-situ liquid phase polymerization method, finally, the surface of the yarn is coated with gel film with conductive copper wires, the stress sensor is obtained, and the stress sensor can be applied to the wearable electronic skin. The nanofiber core spun yarn stress sensor not only has better mechanical adaptability, but also shows superhigh sensitivity and a wider sensing range when being subjected to stretching, bending, pressure and other external stimuli. In a human body monitoring system, the flexible and high-telescopic nanofiber core spun yarn stress sensor can achieve limb movement monitoring with larger stress change from heart rate monitoring with slight stress change.

Description

technical field [0001] The invention belongs to the technical field of flexible sensors, and relates to a flexible and highly stretchable nanofiber core-spun yarn stress sensor with a wrinkled structure and a preparation method thereof, in particular to a flexible and highly stretchable sensor prepared by using electrospinning technology and liquid phase deposition polymerization technology The nanofiber core-spun yarn sensor with wrinkled structure is used in human health monitoring system. Background technique [0002] Human skin is capable of transmitting various mechanical stimuli from the external environment to the brain. Achieving this functionality in artificial skin is key to creating advanced humanoid robots, biomedical prostheses, surgical electronic gloves and wearable health monitoring devices. In order to mimic the properties of human skin, the artificial skin should have the ability to measure the spatial distribution of stress induced by various mechanical s...

Claims

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Application Information

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IPC IPC(8): A61B5/00D01D5/00D02G3/02D02G3/34D02G3/44
CPCA61B5/6801A61B2562/0247D01D5/003D01D5/0069D01D5/0076D01D5/0092D02G3/02D02G3/34D02G3/441D10B2321/042D10B2321/10D10B2331/10
Inventor 周玉嫚何建新南楠刘凡邵伟力崔世忠齐琨李梦营王琳琳张景李方陶雪姣翁凯
Owner ZHONGYUAN ENGINEERING COLLEGE
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