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Low-temperature curing silver/silver chloride slurry for flexible bioelectrode and preparation method thereof

A bio-electrode, silver chloride technology, used in applications, diagnostic recording/measurement, sensors, etc., to achieve the effect of improving production efficiency, strong anti-interference ability, and wide application fields

Active Publication Date: 2019-04-19
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode is prepared by the screen printing process, which overcomes the cumbersome shortcomings of the traditional method. Because the melting point of the flexible substrate is around 250°C, low-temperature curing is used. This production method does not require strict conditions such as high temperature and high pressure. Under the premise of ensuring the electrochemical performance of the electrode, the efficiency of preparing the electrode is greatly improved, and it is suitable for industrial production

Method used

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  • Low-temperature curing silver/silver chloride slurry for flexible bioelectrode and preparation method thereof
  • Low-temperature curing silver/silver chloride slurry for flexible bioelectrode and preparation method thereof
  • Low-temperature curing silver/silver chloride slurry for flexible bioelectrode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 4.8g AgNO 3 Analytical grade was dissolved in 500ml ultrapure water and stirred with a mixer. Weigh 8g NaCl analytical pure 400ml ultrapure water, slowly titrate the NaCl solution into AgNO under stirring 3 solution, resulting in the precipitation of fine-grained silver chloride powder. Pour off the water layer, wash it with ultrapure water, and carry out 3000HZ ultrasonic pulverization at the same time, repeat the cleaning and pulverization several times, until the supernatant liquid is taken, and its conductivity is consistent with that of ultrapure water. Then, the silver chloride powder is first cleaned with ethanol, and then put into an oven for rapid drying under low-temperature vacuum, and the temperature is controlled not higher than 80° C. to obtain fine-grained silver chloride powder. Take 90wt% tap density 3.5g / cm 3 , burning loss 0.9%, specific surface area 1.7m 2 / g, the spherical silver powder with a maximum particle diameter of less than 3 micro...

Embodiment 2

[0039] Prepare silver chloride powder according to the method for embodiment 1, get 40wt% tap density 1.5~5.5g / cm 3 , burning rate 2 Silver / silver chloride powder is fully mixed with flaky silver powder with a maximum flake diameter of less than 25 microns and 60 wt% silver chloride powder with a particle size of 0.2 to 6 microns.

[0040] Add 30wt% vinyl chloride resin and modified polyester to a mixed solvent of 70wt% dimethyl succinate, dimethyl glutarate, dimethyl adipate, and butyl acetate, using a high-speed disperser Stir, the temperature does not exceed 70 ° C, after the resin is completely dissolved, cool down to room temperature, disperse at high speed for 40 minutes to make an organic vehicle.

[0041] 38wt% silver / silver chloride powder and 62wt% organic vehicle were ground and dispersed with a three-roll mill, and finally degassed under reduced pressure to obtain silver / silver chloride electrode slurry.

[0042] The prepared silver / silver chloride electrode paste...

Embodiment 3

[0044] Prepare silver chloride powder according to the method for embodiment 1, get 60wt% tap density 5.6g / cm 3 , burning loss 0.9%, specific surface area 1.3m 2 / g, spherical silver powder with maximum particle size 3 , burning loss rate2 / g, silver flake powder with a maximum flake diameter of <25 microns is fully mixed with 20 wt% silver chloride powder with a particle diameter of 0.2 to 6 microns to form silver / silver chloride powder.

[0045] 40wt% vinyl chloride resin and modified polyester are added in the mixed solvent of 58wt% dimethyl succinate, dimethyl glutarate, dimethyl adipate, ethylene glycol butyl ether acetate, Use a high-speed disperser to stir, the temperature does not exceed 70°C, after the resin is completely dissolved, cool down to room temperature, add 2wt% blocked isocyanate, and disperse at high speed for 40 minutes to make an organic vehicle.

[0046] Grind and disperse 60 wt% silver / silver chloride powder and 40 wt% organic vehicle using a three-ro...

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Abstract

The invention discloses a low-temperature curing silver / silver chloride slurry for a flexible bioelectrode and a preparation method thereof. The silver / silver chloride slurry comprises, by weight, 38-70wt% of silver / silver chloride powder and 30-62wt% of an organic carrier, wherein the silver / silver chloride powder is composed of 40-90wt% of silver powder and 10-60wt% of silver chloride powder. The prepared flexible bioelectrode is low in square resistance, good in adhesion, good in electrode potential stability, high in anti-interference capability and good in biocompatibility, specific shapes can be formed for different use environments, the cost is low, and mass production is easy. The obtained flexible bioelectrode can highly fit the human tissue, especially the skin, can meet the wearing requirements of different parts of the human body, can measure more accurate and reliable bioelectrical signal data, and can be applied to the fields of biosensor electrodes, ECG electrodes, electrochemical reference electrodes, blood glucose test reference electrodes, environment test electrodes and the like.

Description

technical field [0001] The invention relates to a low-temperature curing silver / silver chloride slurry for flexible biological electrodes and a preparation method thereof, belonging to the field of new information electronic materials. Background technique [0002] Silver / silver chloride Ag / AgCl electrode is a common reference electrode, which has the advantages of high exchange current density, low polarization, low impedance, and constant potential. In bioelectrical signal detection technology, the Ag / AgCl electrode can not only convert ion current into electronic current under low current conditions, but also has the advantages of stable electrical signal baseline and strong anti-interference ability. The most commonly used biopotential electrodes currently used to measure EEG, ECG, EMG, or EOG signals are standard wet silver / silver chloride Ag / AgCl electrodes found in hospital-based medical diagnostics, stating Silver / silver chloride Ag / AgCl electrodes have been widely ...

Claims

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Application Information

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IPC IPC(8): A61B5/0408A61B5/0478A61B5/0492A61B5/0496B22F1/00B22F9/04A61B5/296
CPCB22F1/0003B22F9/04B22F2009/042A61B5/25A61B5/291A61B5/398A61B5/296
Inventor 李俊鹏万甦伟陈家林李文琳李燕华
Owner KUNMING INST OF PRECIOUS METALS
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