A fully flexible dry electrode based on printing technology and its preparation method

A printing technology and dry electrode technology, applied in the fields of biomedicine and materials, can solve the problems of difficult to achieve high precision, high efficiency, undisclosed flexible electrode materials, formulations and preparation methods, etc., to improve production efficiency and adaptability. It has the effect of strong signal acquisition stability and simplified production process.

Active Publication Date: 2021-07-23
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention does not disclose the material, formula and preparation method of the flexible electrode, and the pasting process is used for the assembly of various components, which makes it difficult to achieve high-precision and high-efficiency production

Method used

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  • A fully flexible dry electrode based on printing technology and its preparation method
  • A fully flexible dry electrode based on printing technology and its preparation method
  • A fully flexible dry electrode based on printing technology and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Preparation of flexible and stretchable substrate: Mix polydimethylsiloxane (PDMS) prepolymer and its curing agent at a mass ratio of 10:1, spin-coat to form a film, and cure at room temperature to 80°C for 10 minutes ~24h is a semi-cured flexible stretchable substrate, and the thickness of the substrate film is controlled at about 0.1mm by the speed and time of spin coating;

[0045] 2) Preparation of flexible conductive paste: use PDMS prepolymer and its curing agent as the polymer, silver powder (Ag) as the conductive element, and prepare PDMS / Ag conductive paste by stirring and blending, wherein the solid content of the Ag powder is 75 ~85wt%;

[0046] 3) Preparation of single-channel flexible and stretchable electrode units and electrode leads: Print PDMS / Ag conductive paste on the surface of PDMS substrate by screen printing process, and then cure at room temperature to 120°C for 30min to 24h to form PDMS / Ag Ag electrode unit and electrode leads. Since the po...

Embodiment 2

[0051] 1) Preparation of flexible and stretchable substrate: using styrene-butadiene-styrene (SBS) block copolymer as raw material and toluene as solvent, prepare a certain concentration of SBS / toluene solution, pass through in a flat container Pouring and drying at room temperature to 100°C for 2h to 24h to form a film. The thickness of the SBS film is controlled to be about 0.2 mm by the size of the container and the pouring amount of the SBS / toluene solution.

[0052] 2) Preparation of flexible conductive paste: use SBS / toluene solution as polymer and carbon black (CB) as conductive element, and prepare SBS / CB conductive paste by stirring and blending, wherein the solid content of CB is 12-18wt%;

[0053] 3) Preparation of single-channel flexible and stretchable electrode units and electrode leads: Print SBS / CB conductive paste on the surface of SBS film substrate by metal mask printing process, and then cure at room temperature to 100°C for 30min to 24h. After the toluene...

Embodiment 3

[0057] 1) Preparation of flexible and stretchable substrate: use thermoplastic polyurethane elastomer (TPU) as raw material and tetrahydrofuran (THF) as solvent to prepare a certain concentration of TPU / THF solution, and pour it in a flat container at room temperature ~ 60 Dry at ℃ for 30min~12h to form a film. The thickness of the TPU film is controlled to be about 0.3 mm by the size of the container and the pouring amount of the TPU / THF solution.

[0058] 2) Preparation of flexible conductive paste: TPU / THF solution is used as polymer and carbon nanotube (CNT) is used as conductive element, and TPU / CNT conductive paste is prepared by ultrasonic blending, wherein the solid content of CNT is 8-12wt% ;

[0059] 3) Preparation of multi-channel flexible and stretchable electrode units and electrode leads: 3D printing technology was used to print TPU / CNT conductive paste on the surface of TPU film substrate, and then cured at room temperature to 60°C for 30min to 12h to make the ...

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Abstract

The invention relates to a fully flexible medical dry electrode based on printing technology, which includes a flexible stretchable substrate, a flexible stretchable electrode unit, a flexible stretchable electrode lead, an electrode lead interface and an external circuit connection line, and an electrode lead. Insulating layer; wherein, the flexible stretchable electrode unit and the flexible stretchable electrode lead are arranged and bonded on the surface of the flexible stretchable substrate with a flexible conductive paste by printing technology, and one end of the flexible stretchable electrode lead is connected to the flexible stretchable Extend the electrode unit, and the other end is connected to the external circuit connection line through the electrode lead interface; the electrode lead is provided with an insulating layer of the electrode lead; the stretchable electrode lead is in a sandwich structure between the flexible base and the insulating layer; flexible and pullable The same material is used for the stretch base, the printable polymer base of the flexible conductive paste, and the insulating layer for the electrode leads. The medical dry electrode of the present invention has the advantages of high acquisition quality, strong reliability, safety and comfort, low cost, wide application range and the like.

Description

technical field [0001] The invention relates to the fields of biomedicine and materials, in particular to a fully flexible medical dry electrode and a preparation method thereof. Background technique [0002] Physiological electrical signals of the human body (EEG, EMG, ECG, OEG, etc.) are an effective way to reflect the health status of the human body, and have been widely concerned in medical clinical diagnosis and daily health monitoring. For example: sleep monitoring by wearing cap electrodes to record scalp EEG; heart disease diagnosis by recording ECG signals through body surface ECG electrodes; treating pain diseases such as migraine by applying electrical stimulation through electrodes. Effective collection of high-quality physiological electrical signals is an important prerequisite for analyzing and evaluating physiological health information, and it is also the basic guarantee for clinical monitoring, diagnosis, intervention, and treatment. [0003] At present, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/24A61B5/257A61B5/266A61B5/296
CPCA61B5/25A61B5/24A61B5/291A61B5/296
Inventor 胡友根孙蓉朱朋莉赵涛
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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