Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Flexible sensor and preparation method thereof

A flexible sensor and flexible insulating material technology, applied in electromagnetic measurement devices, electric/magnetic solid deformation measurement and other directions, can solve the problems of inaccessible, complicated, and difficult to flexible sensors, and achieves low cost, simple and convenient method, and simple preparation method. Effect

Active Publication Date: 2016-12-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this product has excellent tensile bending properties and humidity sensitivity, there are deficiencies in its preparation method. First, the initial resistance of the product is too large, up to 50 megohms, which greatly increases the difficulty of testing, thus It makes it difficult for practical application; secondly, the resistance change rate of the product after stretching is too small. When the stretching amount is 50%, 100%, 150% and 200% respectively, the change rate of resistance is only 0.02, 0.036 , 0.048 and 0.066, such a small resistance change rate makes it difficult to be used in flexible sensors; again, the preparation method is not only easy to introduce other impurities, but also more complicated, and it is impossible to obtain a product with a high resistance change rate after stretching

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flexible sensor and preparation method thereof
  • Flexible sensor and preparation method thereof
  • Flexible sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The concrete steps of preparation are:

[0045] In step 1, the molar ratio of aniline and protonic acid is 0.8:2.2, and the two are mixed and then stirred evenly to obtain a transparent mixed solution; wherein, the protonic acid is sulfuric acid. Then put the positive electrode and graphite negative electrode in a transparent mixed solution, and the current density is 0.2A / cm 2 After 2 hours of electrodeposition, the following figure 1 Protonic acid-doped polyaniline coated on the positive electrode shown in the spectral line; wherein, the positive electrode is conductive glass.

[0046]Step 2, first bake the protonic acid-doped polyaniline covered on the positive electrode at 50°C for 30 minutes, and then install electrodes on the upper surfaces of both ends; where the electrodes are installed by using conductive silver glue to mix the wire with protonic acid The mixed polyaniline is connected to obtain the protonic acid-doped polyaniline covered on the positive elec...

Embodiment 2

[0048] The concrete steps of preparation are:

[0049] In step 1, the molar ratio of aniline and protonic acid is 0.9:2.1, and the two are mixed and then stirred evenly to obtain a transparent mixed solution; wherein, the protonic acid is sulfuric acid. Then put the positive electrode and graphite negative electrode in a transparent mixed solution, and the current density is 0.4A / cm 2 After 1.7h of electrodeposition, the following figure 1 Protonic acid-doped polyaniline coated on the positive electrode shown in the spectral line; wherein, the positive electrode is conductive glass.

[0050] Step 2, first bake the protonic acid-doped polyaniline covered on the positive electrode at 55°C for 25 minutes, and then install electrodes on the upper surfaces of both ends; wherein, the installation electrode is to use conductive silver glue to mix the wire with protonic acid The mixed polyaniline is connected to obtain the protonic acid-doped polyaniline covered on the positive elec...

Embodiment 3

[0052] The concrete steps of preparation are:

[0053] In step 1, the molar ratio of aniline and protonic acid is 1:2, the two are mixed and then stirred evenly to obtain a transparent mixed solution; wherein the protonic acid is sulfuric acid. Then put the positive electrode and graphite negative electrode in a transparent mixed solution, and the current density is 0.6A / cm 2 After 1.3h of electrodeposition, the following figure 1 Protonic acid-doped polyaniline coated on the positive electrode shown in the spectral line; wherein, the positive electrode is conductive glass.

[0054] Step 2, first bake the protonic acid-doped polyaniline covered on the positive electrode at 60°C for 20 minutes, and then install electrodes on the upper surfaces of both ends; wherein, the installation electrode is to use conductive silver glue to mix the wire with protonic acid The mixed polyaniline is connected to obtain the protonic acid-doped polyaniline covered on the positive electrode wit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a flexible sensor and a preparation method thereof. The flexible sensor is featured in that the protonic acid doping peak in the infrared Fourier spectra of a protonic-acid-doped polyaniline sheet is 1240cm<-1>, two ends of the protonic-acid-doped polyaniline sheet are provided with electrodes, and the protonic-acid-doped polyaniline sheet is coated with a flexible insulating material. The method comprises steps of firstly uniformly mixing aniline and protonic acid to obtain a transparent solution, placing an anode and a graphite cathode in the transparent mixed solution for electrodeposition to obtain protonic-acid-doped polyaniline coating on the anode, then dying the protonic-acid-doped polyaniline, arranging electrodes at two ends of the protonic-acid-doped polyaniline to obtain electrode-contained protonic-acid-doped polyaniline coating on the anode, separating the electrode-contained protonic-acid-doped polyaniline from the anode, coating the flexible insulating material on the surface of the protonic-acid-doped polyaniline provided with the electrodes at two ends, and dying the coated protonic-acid-doped polyaniline to obtain a target product. The flexible sensor has a high resistance change rate in stretching, can be widely used in working conditions of folding, distorting, stretching and the like, and is particularly suitable for the field of wearable equipment.

Description

technical field [0001] The invention relates to a sensor and a preparation method, in particular to a flexible sensor and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, sensors have been widely used in biomedical testing, intelligent robots, flexible displays, wearable devices and other fields. Sensors in these fields often need to work under high strain or extreme conditions such as folding, twisting, stretching, etc., which requires the sensor not only to have good strain-resistance characteristics, but also to have excellent flexibility. To this end, people have made various unremitting efforts, such as the Chinese invention patent application CN 105603761A published on May 25, 2016, which discloses a moisture-sensitive stretchable polyaniline conductive fiber and its preparation method. The conductive fiber mentioned in the patent application for this invention includes a template fiber and a protonic ac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
CPCG01B7/18
Inventor 宫欣欣费广涛付文标
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com