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A kind of preparation method of human skin physiological electrode sensor

A technology of electrode sensor and epidermis, which is applied in sensor, medical science, diagnosis, etc., can solve the problems of poor adaptability of flexible materials, harmful to human body and environment, and small processing area, so as to achieve good wearability and comfort, avoid Pollution, to achieve large-area effects

Active Publication Date: 2020-09-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these processes have good processing accuracy and reliability, they also have the disadvantages of small processing area, high cost, and complicated operation. Most of the materials used are harmful to the human body and the environment, and the adaptability to some flexible materials is not good.

Method used

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  • A kind of preparation method of human skin physiological electrode sensor
  • A kind of preparation method of human skin physiological electrode sensor
  • A kind of preparation method of human skin physiological electrode sensor

Examples

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preparation example Construction

[0033] refer to Figure 1 to Figure 5 , the present invention provides a kind of preparation method of wearable human skin physiological electrode sensor, comprises the following steps:

[0034] (1) Clean the hard substrate 2 with acetone, isopropanol and deionized water in sequence, and then dry it with nitrogen. Preferably, the hard substrate 4 is a monocrystalline silicon wafer, polycrystalline silicon wafer, epitaxial wafer, quartz wafer or glass wafer, with a flat and smooth surface.

[0035] (2) Add polyvinyl alcohol powder into deionized water 9 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 is sodium dodecylbenzenesulfonate or sodium dodecylsulfate. When preparing polyvinyl alcohol aqueous solution, add polyvinyl alcohol powder and dispersant to deionized water...

Embodiment 1

[0048] a. The hard substrate 2 is a 4-inch monocrystalline silicon wafer, and its polished surface is cleaned with acetone, isopropanol and deionized water in sequence and dried with nitrogen, and then the 10% concentration polyvinyl alcohol aqueous solution configured in the above scheme three is spin-coated On the above, the spin coating speed was 500 rpm and the spin coating time was 4 min. Afterwards, the silicon wafer was heated on a hot plate at a temperature of 80° C. for 15 minutes, so that the water was heated to evaporate, and the polyvinyl alcohol was solidified to form a film, and the preparation of the sacrificial layer 1 was completed.

[0049] b. Put the hard substrate 2 on the stage of the manual screen printing machine, and keep the screen plate 6 parallel to the hard substrate 2 with a distance of 5 mm. After coating the pasty conductive material 4 on the 200 mesh screen plate 6, scrape the surface of the screen plate 6 with a scraper 3, the angle formed by t...

Embodiment 2

[0054] a. The selection of the hard substrate 2 and the preparation of the sacrificial layer 1 are the same as in Example 1.

[0055] b. Put the hard substrate 2 on the stage of the manual screen printing machine, and keep the screen plate 6 parallel to the hard substrate 2 with a distance of 8 mm. After the 300 mesh screen plate 6 is coated with paste-like conductive material 4, scrape the surface of the screen plate 6 with a scraper 3, the angle between the central axis of the scraper 3 and the forward direction during scraping is 60°, and the scraping speed is 5 cm / sec, a patterned functional layer 5 is formed. The hard substrate 2 is then heated to cure it. The thickness of the functional layer 5 is 40 micrometers.

[0056] c. Spin-coat platinum-catalyzed silicone rubber on the sacrificial layer 1 as the flexible substrate 7 of the human epidermal physiological electrode sensor. The spin-coating speed is 800 rpm, and the spin-coating time is 3 minutes, so that it covers...

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Abstract

The invention belongs to the field of flexible electronics, and discloses a preparing method of a human body epidermis physiology electrode sensor. The method comprises the following steps of 1, cleaning and blow-drying a hard substrate; 2, spin-coating the hard substrate with a polyvinyl alcohol solution, and heating and curing for film formation to form a sacrificial layer; 3, installing a screen printing plate and the hard substrate on a screen printing machine; 4, coating the screen printing plate with a conductive material, and utilizing a scraper for blade coating on the surface of the screen printing plate to form a function layer of the sensor; 5, spin-coating the sacrificial layer with a flexible high polymer, and heating to cure the flexible high polymer; 6, utilizing deionized water for heating to completely dissolve the sacrificial layer, so that the human body epidermis physiology electrode sensor is stripped from the hard substrate. The sensor prepared by means of the method has good wearability, and can move along with the human body without relative displacement; on one hand, the interference of movement with signals is reduced, and dynamic monitoring can be achieved; on the other hand, the sensor is comfortable, can be worn for a long term, and can collect richer physiology signals.

Description

technical field [0001] The invention belongs to the field of flexible electronics, and more specifically relates to a preparation method of a human skin physiological electrode sensor. Background technique [0002] In the field of modern medicine, human physiological sensors are very important tools. Improving the sensitivity and accuracy of sensors to obtain more precise human physiological signals is a development trend in the current medical field. Traditional physiological sensors are usually manufactured based on hard electronic technology. They are not bendable or stretchable, and it is difficult to make good contact with the measured organs. Not only do they need to be fixed with auxiliary devices such as bandages, but it is also difficult to eliminate signal interference caused by human movement. It has been difficult to keep up with the advancement of medical technology. The rapid development of flexible electronic technology in recent years has solved the above p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/04
CPCA61B5/24
Inventor 吴豪郭伟黄鑫
Owner HUAZHONG UNIV OF SCI & TECH
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