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Electrode, signal detection system, hydrogel applied to electrode and preparation method thereof

A hydrogel and viscous hydrogel technology, applied in applications, measuring devices, diagnostic recording/measurement, etc., can solve problems such as poor stretchability and biocompatibility, and the inability to judge the user's emotional state, and achieve high tensile strength Elongation performance, simple structure, effect of reducing gap

Active Publication Date: 2021-12-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, limited by the extremely poor stretchability and biocompatibility of traditional devices, commercial wearable devices cannot judge the user's emotional state

Method used

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  • Electrode, signal detection system, hydrogel applied to electrode and preparation method thereof
  • Electrode, signal detection system, hydrogel applied to electrode and preparation method thereof
  • Electrode, signal detection system, hydrogel applied to electrode and preparation method thereof

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preparation example Construction

[0041] The present invention also provides a method for preparing a hydrogel applied to an electrode, wherein the method for preparing the hydrophobic hydrogel mainly includes the following steps:

[0042] (1) Sodium dodecyl sulfate monomer was dissolved in sodium chloride solution to form SDS / NaCl micelles.

[0043] (2) put C 18 After the monomer is placed in the obtained solution, it is heated and stirred for a predetermined time so that C 18 into the micelles and then dissolve the acrylamide monomer in the stirred solution.

[0044] (3) After degassing the obtained mixed solution with nitrogen, add N,N'-methylenebisacrylamide monomer, clay and photoinitiator and stir, then transfer to nitrogen purging mold, After sealing for a period of time, a completely degassed hydrogel is prepared. In one embodiment, the hydrophobic hydrogel may be a liquid pre-polymerized hydrophobic hydrogel.

[0045] The preparation method of the viscous hydrogel mainly comprises the following st...

Embodiment 1

[0071] The preparation method of the electrode provided in Example 1 of the present invention mainly includes the following steps:

[0072] 1. Clean the hard substrate with acetone, isopropanol and deionized water in sequence, and then dry it with nitrogen. Preferably, the hard substrate is a quartz glass sheet 2 with a flat and smooth surface.

[0073] 2. Add polyvinyl alcohol powder to deionized water to dissolve, configure polyvinyl alcohol solution, and let it stand for later use. Preferably, the mass fraction of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 8%-12%, and the mass fraction of the dispersant is 0.5%-2%. The dispersant used was sodium lauryl sulfate. When preparing polyvinyl alcohol aqueous solution, add polyvinyl alcohol powder and dispersant to deionized water, and stir while heating. The heating temperature is 60°C to 80°C, and the stirring time is 4 hours to 6 hours; The solution was left standing at room temperature for later use.

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Abstract

The invention belongs to the technical field related to biomedical instruments, and discloses an electrode, a signal detection system, hydrogel applied to the electrode and a preparation method thereof, the hydrogel is hydrophobic hydrogel or viscous hydrogel, the hydrophobic hydrogel comprises an acrylamide monomer, a lauryl sodium sulfate monomer, Nacl, C18, a N, N'-methylene bisacrylamide monomer, clay and an initiator; and the viscous hydrogel comprises the following components: a zwitterionic monomer, an acrylamide monomer, clay, a viscous monomer, glycerol, an initiator and an N, N'-methylene bisacrylamide monomer. The hydrophobic hydrogel has good hydrophobicity, the mechanical performance and stretchability of the hydrogel are prevented from being reduced when the hydrogel encounters water, it is ensured that the hydrogel electrode stably works in a wet scene, the use scene of the hydrogel electrode is expanded, and therefore a detection system can conduct continuous detection while skin diseases are avoided.

Description

technical field [0001] The invention belongs to the related technical field of biomedical devices, and more specifically relates to an electrode, a signal detection system, a hydrogel applied to the electrode and a preparation method thereof. Background technique [0002] In recent years, relevant research results in new materials and new processes have promoted the rapid development of the preparation process and application of bioelectricity measurement electrodes. Since epidermal electrodes are in direct contact with biological tissues, good stretchability and biocompatibility are required. Traditional bioelectricity measurement electrodes are usually made of metal materials and silicon-based materials, which have a high Young's modulus. Therefore, applying traditional rigid electrodes directly to biological soft tissues will not only result in inaccurate measurement signals, but also cause severe tissue damage. The solution to this problem is to soften the electrodes. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F222/38C08F220/38C08F2/48C08J3/075C08L33/26C08K3/34G01N27/327A61B5/256A61B5/266A61B5/291
CPCC08J3/075C08F220/56C08F2/48C08K3/346G01N27/327A61B5/291A61B5/266A61B5/256C08J2333/26C08F222/385C08F220/387
Inventor 吴豪杨淦光朱侃浩周森
Owner HUAZHONG UNIV OF SCI & TECH
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