Preparation method of flexible force sensitive sensor

Abstract

The invention belongs to the technical field of sensor preparation and relates to a preparation method of a flexible force sensitive sensor. According to the preparation method, an electrostatic spinning method is firstly adopted for preparing dendritic nanometer structure polyaniline coaxial ordered fibers of insulated high molecular materials of polyvinylidene fluoride (PVDF), PVDF fibers are used as reaction templates to be soaked into polyaniline reaction solution, a conducting polyaniline wrapping layer is formed on the surface of the PVDF fibers by an in-situ polymerization method in a wrapping form, the surface of the conducting polyaniline wrapping layer is subjected to self assembly to form a dendritic nanometer structure through controlling the reaction time, the polymerization temperature and the mol ratio of aniline monomers to doping agents, and coaxial structure polyaniline fibers with larger specific surface are obtained; then, the prepared coaxial structure polyaniline fibers are fixed on a bent plastic film, electrodes are prepared, protecting films are covered and are connected into a constant voltage circuit, and the flexible force sensitive sensor of the nanometer structure conducting polyaniline coaxial ordered fibers is prepared. The preparation method has the advantages that the preparation method is simple and convenient, in addition, the cost is low, the sensor structure is simple, the temperature influence is small, the mechanical property is good, the cracking is avoided, the sensitivity is high, and the response time is short.

Description

Technical field: [0001] The invention belongs to the technical field of sensor preparation, and relates to a method for preparing a flexible force-sensitive sensor, in particular to a method for preparing a dendritic coaxial nanostructure conductive polyaniline fiber flexible force-sensitive sensor by means of electrospinning and in-situ polymerization . Background technique: [0002] The force sensor is a sensing device that detects the interaction force between gases, solids, liquids and other substances. The commonly used materials include semiconductors, metals and synthetic materials. According to the working principle, it is divided into resistance strain sensor, inductive force sensor, capacitor Type force sensor, resonant force sensor, etc. There are various forms of force sensors in the disclosed technology. For example, Chinese patent (application number 01124284.1) discloses a new type of full silicon nitride microstructure resonant beam pressure sensor ; Patent ...

AI Technical Summary

Problems solved by technology

However, there is no precedent for the use of polyaniline micro-nano composite fibers to prepare force-sensitive sensors.

At the same time, polyaniline also has the disadvantages of high melting point, insoluble, difficult processing and molding of most conductive polymer materials, and is not easy to process and apply.

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