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Flexible leather electrode material based on liquid metal, and preparation method of flexible leather electrode material

A liquid metal and electrode material technology, which is applied to devices that coat liquid on the surface, medical science, sensors, etc. It can solve the problems of complicated production of flexible dry electrodes, and achieve the effects of good medical value, accurate monitoring, and increased conductivity.

Pending Publication Date: 2021-09-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art and solve the above-mentioned problem that the production of flexible dry electrodes is relatively complicated.

Method used

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  • Flexible leather electrode material based on liquid metal, and preparation method of flexible leather electrode material
  • Flexible leather electrode material based on liquid metal, and preparation method of flexible leather electrode material
  • Flexible leather electrode material based on liquid metal, and preparation method of flexible leather electrode material

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Effect test

preparation example Construction

[0018] The preparation method of a flexible leather electrode material based on liquid metal of the present invention comprises the following steps:

[0019] 1. Leather surface treatment: Scrub natural leather with absolute ethanol to remove organic pollutants on the leather surface.

[0020] 2. Preparation of the liquid metal layer: place the natural leather on a suction filtration device, apply the liquid metal to the surface of the natural leather, and keep it for a period of time. Through vacuum filtration, the liquid metal penetrates into the pores of the leather surface to increase the bending. The conductivity of the leather surface in the state.

[0021] 3. Preparation of the silver paste encapsulation layer: continue to maintain the state of suction filtration, evenly coat the silver paste on the surface of the liquid metal, turn off the suction filtration, and place it at room temperature for more than 12 hours to form a solidified silver paste layer, which is effect...

Embodiment 1

[0024] 1. Use absolute ethanol to scrub the grain surface of natural pig leather.

[0025] 2. Apply the liquid metal to the pig leather grain surface under the condition of suction filtration, and keep it for a period of time, so that a part of the liquid metal enters the pores of the leather grain surface.

[0026] 3. Continue to maintain the state of suction filtration, evenly coat the silver paste on the surface of the liquid metal, turn off the suction filtration, and place it at room temperature for more than 12 hours to form a solidified silver paste layer.

[0027] The prepared natural pig leather grain liquid metal electrode material was cut into a circular signal detection part with a diameter of 20 mm and an electrode lead-out end with a width of 7 mm, and the electrode-skin contact impedance of the electrode was measured on the human forearm. Firstly, the electrode-skin impedance was measured using Ag / AgCl gel electrodes commonly used in clinical practice. The param...

Embodiment 2

[0030] 1. The manufacturing process of the liquid metal leather electrode material in Example 2 is referred to in Example 1, except that the pig leather grain surface is replaced with a pig leather section, and a liquid metal electrode with a natural pig leather section is produced.

[0031] The electrode-skin impedance test process and experimental parameters of the liquid metal electrode in the section of natural pig leather are also referred to in Example 1.

[0032] Impedance data chart attached figure 2 It is shown that at a sampling interval of 5 Hz, the impedance of the liquid metal electrode on the natural pig leather section is slightly smaller than that of the standard electrode, indicating that the prepared liquid metal electrode has a lower impedance than the wet electrode as a dry electrode.

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Abstract

The invention discloses a flexible leather electrode material based on liquid metal, and a preparation method of the flexible leather electrode material The electrode material comprises a natural leather substrate 1, a liquid metal layer 2 which is coated to the surface of the natural leather substrate and permeates into the leather substrate, and a silver paste packaging layer 3 which is coated to the surface of the liquid metal layer and is used for carrying out curing and conducting. As a flexible material, leather has a porous structure, the liquid metal permeates into holes through a vacuum filtration method, the conductivity of the surface of the leather under a bending state can be increased, and the quality of bio-electricity signals collected by a leather electrode under different skin states is improved. The liquid metal is metal under the liquid state at the room temperature, has electrical conductivity, fluidity and an infinite deformation capability, and can maintain the good electrical conductivity in any shape. The flexible leather electrode material, which is prepared by the preparation method disclosed by the invention, based on the liquid metal fits the human skin, forms shape-preserving contact with the skin, enlarges a contact area, reduces impedance between the electrode and the skin, and has the advantage of long-term wearing.

Description

technical field [0001] The invention relates to the technical field of preparation of bioelectrical signal monitoring electrode materials, in particular to a liquid metal-based flexible leather electrode material and a preparation method thereof. Background technique [0002] Bioelectricity is a regular electrical phenomenon closely related to the state of life. Common bioelectrical signals include ECG, EEG, EMG, etc., which are an important parameter to reflect the health status of the human body. greater effect. The dry electrodes traditionally used for bioelectrical signal acquisition are mostly rigid materials, which cannot form conformal contact with the skin, so the detected signal noise is relatively large. At present, the most common Ag / AgCl gel electrode on the market may cause skin allergic reactions, and it will dry out if placed in the air for a long time, causing large measurement errors, so it cannot be used in long-term monitoring. [0003] Therefore, a flex...

Claims

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Application Information

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IPC IPC(8): A61B5/265B05D5/12B05D7/24B05D1/36
CPCA61B5/265B05D5/12B05D7/24B05D1/36B05D7/542A61B2562/0215A61B2562/125B05D2203/24
Inventor 芶立郭凌霄李行言
Owner SICHUAN UNIV
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