A kind of preparation method of composite nanofiber film and flexible strain sensor

Abstract

The invention discloses a preparation method of a composite nanofiber membrane and a flexible strain sensor. The steps of a composite nanofiber membrane are as follows: first dissolving polymer particles in an organic solvent to prepare a spinning solution; transferring the spinning solvent to a syringe In the process, the spinning solution is extruded through a syringe, and the relevant parameters of electrospinning are adjusted to stabilize the jet flow so that the nanofiber film is collected on the collecting plate; after the silver nanowire dispersion is diluted and ultrasonically dispersed in a water bath, vacuum-assisted suction filtration Methods A metal nanowire layer is deposited on the pre-stretched nanofiber film; the bonding force between the nanowires and between the nanowires and the elastic substrate is improved by high temperature annealing. The prepared flexible strain sensor has a large sensing range and can be used to detect deformations such as bending, stretching, and torsion.

Description

technical field [0001] The invention belongs to the technical field of flexible strain sensors, and in particular relates to a preparation method of a composite nanofiber membrane and a flexible strain sensor. Background technique [0002] Strain sensor is a kind of important sensor device. When the sensor device is subjected to external force, it will deform itself, resulting in a change in the resistance or capacitance of the device. By detecting changes in these physical quantities, the function of strain detection is realized. In recent years, flexible and wearable strain sensors have gradually become a research hotspot in the field of strain sensors. This flexible strain sensor has good sensing characteristics such as sensitivity, repeatability and stability, and has become a core device in the fields of electronic skin, wearable electronic devices, and flexible human-computer interaction devices. With the further development of social informatization, various new dev...

AI Technical Summary

Problems solved by technology

However, flexible strain sensors prepared in this way usually cannot combine high sensitivity and large detection range

In order to improve the detection range, it is often necessary to increase the amount of conductive nanomaterials, which will lead to a decrease in sensitivity and bring about cost problems

How to prepare flexible sensors with large sensing range and high sensitivity while reducing the amount of expensive conductive nanomaterials is still a big challenge

At the same time, the bonding force between solid conductive nanomaterials and elastic substrates is usually weak, and the conductive network is prone to breakage during the stretching process, which makes the sensing mechanism invalid, resulting in a small sensing range of the flexible strain sensor.

Therefore, while reducing the amount of expensive conductive nanomaterials and ensuring the sensitivity of the sensor, it is still a big challenge to prepare a flexible strain sensor with a large sensing range.

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