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Multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel

A technology of electronic skin and hydrogel, which is applied in the direction of measuring devices and instruments, can solve the problems of locating the stimulation site and the inability to visualize the stimulation signal, etc., and achieve the effect of low cost and non-destructive effect

Inactive Publication Date: 2020-08-21
NANJING DRUM TOWER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the current electronic skin that cannot visualize the stimulation signal and locate the stimulation site, the present invention provides a multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel

Method used

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  • Multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel
  • Multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel
  • Multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1 Multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel

[0031] (1) The preparation steps of the prepolymer solution of conductive cellulose liquid crystal hydrogel:

[0032] The mass fraction of 5% acrylamide (AAm, macromolecular monomer), 5% acrylic acid (AAc, macromolecular monomer) and 0.3% N,N'-methylenebisacrylamide (Bis, cross-linking agent), mass fraction of 0.1% α-hydroxyisobutyrophenone (HMPP, photoinitiator) mixed with deionized water to obtain the prepolymer solution of polyacrylamide hydrogel; by mass fraction of 60 % hydroxypropyl cellulose, carbon nanotubes with a mass fraction of 2% are mixed with the prepolymer solution of polyacrylamide hydrogel to obtain the prepolymer solution of conductive cellulose liquid crystal hydrogel; in the stirring process, The stirrer works continuously, adding 50 mg of cellulose nanocrystals every 30 minutes to ensure that it is evenly dispersed in the solution; after all the powde...

Embodiment 2

[0035] Example 2 Multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel for real-time sensing

[0036] (1) Multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel for real-time temperature sensing

[0037] Apply the multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel prepared in Example 1 on the arm, connect the wires at both ends to the poles of the multimeter, and use the multimeter to measure the resistance of the electronic skin. Use an ice cube with a size of 100mm*100mm*100mm to touch the electronic skin repeatedly for about 5 seconds each time, then remove it and wait for about 25 seconds. During this period, observe the color change of the electronic skin, and use a multimeter to record the real-time change of the electronic skin resistance. It was observed that every time an ice cube touched the electronic skin, the color of the material at the touched position would change...

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Abstract

The invention relates to a multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel. The multifunctional electronic skin comprises conductive cellulose liquid crystal hydrogel, wires and a flexible transparent protective film. The conductive cellulose liquid crystal hydrogel is packaged in the flexible transparent protective film, and the wires are inserted into the two ends of the conductive cellulose liquid crystal hydrogel. The multifunctional electronic skin based on the conductive cellulose liquid crystal hydrogel can respond to external stimuli such as the temperature, pressure, tension and torsional force and convert the external stimuli into electrical signals and visual optical signals. According to the multifunctional electronic skin based on the conductive cellulose liquid crystal hydrogel, stimulation can be quantitatively output through an electrical signal and the simulation can be located by the visual optical signal; and the multifunctionalelectronic skin has the advantages of being resistant to abrasion, low in cost, reusable, multifunctional, convenient to use, reliable and the like, and can be applied to the field of visual user interaction interfaces.

Description

technical field [0001] The invention relates to the field of biomaterials, in particular to a multifunctional electronic skin based on conductive cellulose liquid crystal hydrogel. Background technique [0002] The skin, the physical barrier between the body and the external environment, converts external stimuli such as temperature, pressure, tension, and twisting forces into electrical signals that the brain receives to generate safe and effective instructions. Due to its high applicability in artificial prostheses, intelligent robots, wearable devices, and medical diagnostics, this multisensory function has prompted researchers to develop artificial flexible electronic skins with similar responsiveness. By incorporating different conductive agents, such as metals, alloys, liquid metals, ions, semiconductors, and carbon nanomaterials, many electronic skins that can feed back external stimulation signals have been developed. Among the above conductive agents, carbon nanotu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02C08G81/02
CPCC08G81/02G01D21/02
Inventor 赵远锦张倬豪王月桐
Owner NANJING DRUM TOWER HOSPITAL