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

High-sensitivity flexible pressure sensing material in pure water and its application

A sensing material and high-sensitivity technology, which is applied in the field of high-sensitivity flexible pressure sensing materials, can solve problems such as the lack of clarity in micro-engineering methods, and achieve the effects of good adjustability, high sensitivity and stability, and high pressure response sensitivity

Active Publication Date: 2022-05-13
TIANJIN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although structural micro-engineering technology has achieved good results in improving the sensitivity, structural engineering methods have great advantages in the control of the tunability and uniformity of the patterned structure and pore structure, the reproducibility of the sensing structure, and the complexity of photolithography. There are still many challenges in terms of performance and cost control. At the same time, due to the variety of sensing mechanisms of the sensor, for different sensing materials, the properties of the material itself will have different effects on the performance of the microstructure, resulting in the best The micro-engineering method still lacks a clear

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
  • High-sensitivity flexible pressure sensing material in pure water and its application
  • High-sensitivity flexible pressure sensing material in pure water and its application
  • High-sensitivity flexible pressure sensing material in pure water and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] figure 1 A schematic diagram showing the polymerization of alkenyl monomers containing zwitterions to form a hydrogel; specifically, the following steps are included: (1) adding 3-[[2-(methacryloyloxy)ethyl]dimethylammonium]propane Ester (carboxybetaine) (4.2 g) was dissolved in water (12 mL), sonicated to dissolve completely, then methylenebisacrylamide (cross-linking agent) (0.0125 g) was added, sonicated to dissolve, and finally added Ammonium sulfate (thermal initiator) (0.02g) and tetramethylethylenediamine (accelerator) (0.0155g, 20μL) were stirred thoroughly to obtain a pre-reaction solution. Add the pre-reaction solution between two slides separated by a 2 mm thick PDMS spacer. Polymerization was then carried out at 60°C for 6 hours to ensure sufficient reaction. After the reaction, the hydrogel was peeled off from the glass slide and soaked in pure water, and the pure water was replaced every day for 5 days to remove unreacted chemicals and reagents to obtain...

Embodiment 2

[0030] (1) Dissolve 3-[[2-(methacryloyloxy)ethyl]dimethylammonium]propionate (carboxybetaine) (4.2 g) in water (12 mL), and ultrasonically make it completely Dissolve followed by addition of methylenebisacrylamide (crosslinker) (0.025 g), sonicate for dissolution, and finally ammonium persulfate (thermal initiator) (0.02 g) and tetramethylethylenediamine (accelerator) (20 μL), and stir well to obtain the pre-reaction solution. Add the pre-reaction solution between two slides separated by a 2 mm thick PDMS spacer. Polymerization was then carried out at 60°C for 6 hours to ensure sufficient reaction. After the reaction, the hydrogel was peeled off from the glass slide, soaked in pure water, and replaced with new pure water every day for 5 days to remove unreacted chemicals and reagents to obtain a highly sensitive flexible pressure sensor with swelling balance. Sensitive material.

[0031] The setting parameters of digital bridge LCR are: test frequency 100 kHz, test level 2 ...

Embodiment 3

[0033] Dissolve 3-[[2-(methacryloyloxy)ethyl]dimethylammonium]propionate (carboxybetaine) (4.2 g) in water (12 mL), sonicate to dissolve completely, and then Add methylenebisacrylamide (crosslinker) (0.05 g), dissolve by ultrasonication, and finally add ammonium persulfate (thermal initiator) (0.02 g) and tetramethylethylenediamine (accelerator) (20 μL), The pre-reaction solution is obtained after fully stirring evenly. Add the pre-reaction solution between two slides separated by a 2 mm thick PDMS spacer. Polymerization was then carried out at 60°C for 6 hours to ensure sufficient reaction. After the reaction, the hydrogel was peeled off from the glass slide, soaked in pure water, and replaced with new pure water every day for 5 days to remove unreacted chemicals and reagents to obtain a highly sensitive flexible pressure sensor with swelling balance. Sensitive material.

[0034] The setting parameters of digital bridge LCR are: test frequency 100 kHz, test level 2 V. Dur...

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
Sensitivityaaaaaaaaaa
Sensitivityaaaaaaaaaa
Sensitivityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of pressure-sensitive materials, in particular to a high-sensitivity flexible pressure-sensing material in pure water and its application. The sensing material is prepared in the following manner: add a crosslinking agent to an aqueous solution of an alkenyl monomer containing zwitterions, dissolve it ultrasonically, and finally add a thermal initiator and an accelerator, and stir well to obtain a pre-reaction solution; the pre-reaction The solution is added between two glass slides, and then polymerized to ensure that the reaction is sufficient to form a hydrogel. The application provides a zwitterionic hydrogel, which, when subjected to external pressure, attracts each other between positive and negative charged groups, which will have a strong solvation effect on water molecules, resulting in ionization of water molecules to generate free ions, so that The material has higher pressure response sensitivity and realizes high-sensitivity sensing in pure water for the first time.

Description

technical field [0001] The invention belongs to the field of pressure-sensitive materials, in particular to a high-sensitivity flexible pressure-sensing material in pure water and its application. Background technique [0002] In order to meet the growing demand for pressure sensors in some specific scenarios of flexible wearable devices (such as health monitoring, artificial intelligence, human-machine interface, etc.), how to improve the sensitivity of sensors has become an important research direction for next-generation sensors. Sensitivity describes the change of the output signal relative to the initial output signal within a specific pressure range, reflecting the responsiveness of the wearable device to mechanical stimuli, and is one of the key performance parameters of the flexible pressure sensor. [0003] The currently developed methods for improving the sensitivity of wearable devices are mainly from the perspective of structural micro-engineering design of mater...

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 Patents(China)
IPC IPC(8): C08J3/075C08L33/14C08L43/02C08L33/24C08F220/36C08F220/38C08F230/02C08F220/58C08F220/54C08F220/06C08F222/38C08F230/06G01L1/16
CPCC08J3/075C08F220/365C08F220/387C08F230/02C08F220/58C08F220/54G01L1/16C08J2333/14C08J2343/02C08J2333/24C08F222/385C08F220/06C08F230/065
Inventor 杨静张雷徐思佳
Owner TIANJIN UNIV
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