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

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...

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 resolution of tactile mapping, etc., but there is a large gap with human skin. , these pressure sensor arrays lack stretchability and can only provide the function of spatial pressure distribution information

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