CN113108841A - Electronic skin with high water resistance and robustness and preparation method and application thereof - Google Patents
Electronic skin with high water resistance and robustness and preparation method and application thereof Download PDFInfo
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- CN113108841A CN113108841A CN202110403021.8A CN202110403021A CN113108841A CN 113108841 A CN113108841 A CN 113108841A CN 202110403021 A CN202110403021 A CN 202110403021A CN 113108841 A CN113108841 A CN 113108841A
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- electronic skin
- silica gel
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- water resistance
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000000741 silica gel Substances 0.000 claims abstract description 25
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 230000008447 perception Effects 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 238000010147 laser engraving Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 238000009662 stress testing Methods 0.000 claims 1
- 238000004132 cross linking Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000000638 stimulation Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 14
- 238000005452 bending Methods 0.000 description 4
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
- A61B5/02055—Simultaneously evaluating both cardiovascular condition and temperature
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Cardiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physiology (AREA)
- General Physics & Mathematics (AREA)
- Pulmonology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses an electronic skin with high water resistance and robustness, a preparation method and application thereof, wherein the preparation method comprises the following steps: preparing a sensor by adopting a laser-induced graphene process to form a sensing layer; pouring silica gel on the sensor, and permeating the silica gel into the porous and loose graphene under the action of gravity; after the silica gel is solidified into a film, stripping the sensor from a substrate adopted by a light-induced graphene process; inverting the sensor, pouring silica gel at the bottom of the sensor and curing to form a film; and 5: and preparing a conductive layer fixedly connected with the sensor. The sensing layer of the electronic skin prepared by the method and the silica gel form a physical crosslinking and bonding structure, so that the electronic skin has high robustness, environmental tolerance and high water resistance. The electronic skin can realize multiple stimulation perceptions of temperature, pressure, deformation, human body pulse and the like, can effectively reduce the number of sensors and power consumption in system integration, and is suitable for the design and development of a flexible micro-integrated system.
Description
Technical Field
The invention relates to a flexible electronic sensor, in particular to an electronic skin, a preparation method and application thereof.
Background
Currently, flexible sensors have gained considerable research interest in various industries. Electronic skin, one of the flexible sensors, has high advantages in the aspects of human body related signal acquisition and the like. This is due to its high skin fit, high performance and high sensitivity.
In the aspects of remote human-computer interaction and the like, human body information acquisition is particularly important, and the current electronic skin is influenced by substrate hydrophobicity and poor adhesion strength (depending on Van der Waals force) between functional acquisition and a substrate when prepared by a deposition process, so that most of the electronic skin has some problems in mechanical robustness and environmental tolerance. Under repeated tests, the functional layer has poor adhesion with the substrate layer, so that the conductive functional layer is easy to fall off from the substrate layer, and data collected by the sensor is distorted, and even the sensor cannot work normally.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the prior art, the electronic skin with high water resistance and robustness, the preparation method and the application thereof are provided, and the problems of poor robustness and poor environment tolerance of the existing electronic skin are solved.
The technical scheme is as follows: a preparation method of electronic skin with high water resistance and robustness comprises the following steps:
step 1: preparing a sensor by adopting a laser-induced graphene process to form a sensing layer;
step 2: pouring silica gel on the sensor, and permeating the silica gel into the porous and loose graphene under the action of gravity;
and step 3: after the silica gel is solidified into a film, stripping the sensor from a substrate adopted by a light-induced graphene process;
and 4, step 4: inverting the sensor, pouring silica gel at the bottom of the sensor and curing the silica gel to form a film to form a cross-linked adhesion structure of the silica gel-wrapped sensing layer;
and 5: and preparing a conductive layer fixedly connected with the sensor.
Further, a PI substrate is adopted in the laser-induced graphene process, PPI of laser engraving is set to be 1000, laser engraving power is 25-30W, and laser engraving speed is set to be 0.5-1.0 cm/s.
Furthermore, a hardening agent is added into the silica gel.
Furthermore, the conducting layer is prepared by fixing a copper wire on the graphene sensor by using conductive silver paste.
An electronic skin prepared according to the method.
The electronic skin prepared according to the method is applied to pressure detection.
The electronic skin prepared according to the method is applied to temperature detection.
The electronic skin prepared by the method is applied to deformation detection.
An electronic skin prepared according to the method is applied to pulse perception detection.
Has the advantages that: according to the electronic skin prepared by the method, the sensing layer and the silica gel form a physical crosslinking and bonding structure, so that the electronic skin has high robustness and environmental tolerance, and has better mechanical robustness and resistance consistency in abrasive paper friction, tape adhesion and water flow impact. The resistance is well maintained under water, and the water-resistant property is very strong. In addition, the electronic skin can realize multiple stimulation perceptions of temperature, pressure, deformation, human body pulse and the like, can effectively reduce the number of sensors and power consumption in system integration, and is suitable for the design and development of a flexible micro-integrated system.
Drawings
Fig. 1 is a graphene pattern prepared by laser engraving;
FIG. 2 is a high robustness electron skin map after transfer of interdigitated electrode shapes;
FIG. 3 is a sandpaper robustness test chart;
FIG. 4 is a test chart of tape sticking;
FIG. 5 is a graph of the electrical skin resistance change before and after immersion in water;
FIG. 6 is a pulse testing chart;
FIG. 7 is a temperature sensing diagram;
FIG. 8 is a finger curvature perception diagram;
FIG. 9 is a pressure sensing graph;
FIG. 10 is a graph showing the electronic skin joint bending characteristics before and after immersion in water.
Detailed Description
The invention is further explained below with reference to the drawings.
A preparation method of electronic skin with high water resistance and robustness comprises the following steps:
step 1: and preparing the sensor by adopting a laser-induced graphene process to form a sensing layer.
The method comprises the following specific steps: firstly, drawing an interdigital electrode pattern as shown in fig. 1 on PPT, and drawing the pattern on a PI substrate by laser engraving to obtain a laser-induced graphene pattern as shown in fig. 1, wherein PPI is selected to be 1000, the laser engraving power is 25-30W, and the laser engraving speed is set to be 0.5-1.0 cm/s.
Step 2: and pouring silica gel on the sensor, and permeating the silica gel into the porous and loose graphene under the action of gravity. Wherein, the hardening agent is added into the silica gel, and the mass part ratio of the silica gel to the hardening agent is 1: 1.
And step 3: after the silica gel is solidified to form a film at normal temperature or on a heating table, peeling the sensor from a PI substrate adopted by the photo-induced graphene process, and at the moment, completely transferring the sensor prepared by the laser-induced graphene process to the silica gel.
And 4, step 4: the sensor is inverted, silica gel is poured at the bottom of the sensor and is solidified into a film, a cross-linked adhesion structure of a silica gel wrapping sensing layer is formed, and therefore the electronic skin in the shape of the interdigital electrode shown in the figure 2 is obtained, and the electronic skin has high robustness and environment tolerance.
And 5: and preparing a conductive layer fixedly connected with the sensor, wherein the conductive layer is prepared by fixing a copper wire on the graphene sensor by using conductive silver paste and is used for leading out an electric signal.
The electronic skin prepared by the method can be used for pressure detection, temperature detection, deformation detection and pulse perception detection.
And carrying out mechanical and electrical robustness tests on the prepared electronic skin.
As shown in fig. 3, the electronic skin was rubbed with sandpaper, and SEM observation of the scratches, as shown on the right side of fig. 3, showed only slight scratches without significant peeling of the conductive layer.
As shown in fig. 4, the electronic skin is adhered by a tape, and only a few conductive layers are attached on the tape, which means that the conductive layers in the prepared high-robustness electronic skin form good physical crosslinking contact with the silica gel.
As shown in fig. 5, the tolerance of the electronic skin to water is tested, and when the electronic skin is put into water, the resistance of the sensor is changed from 500 ohms to 523 ohms, which is only changed by about 5%, so that the electronic skin has high resistance stability.
The multifunctional characteristics of the sensor are tested, the pulse information of the wrist of a human body is tested as shown in fig. 6, the temperature sensing is tested as shown in fig. 7, the bending information of the fingers of the human body is tested as shown in fig. 8, and the external pressure stimulation is tested as shown in fig. 9.
The electronic skin was placed under water and tested for its bending perception under water. As shown in fig. 10, the electronic skin exhibits a very stable bending perception property under water.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A preparation method of electronic skin with high water resistance and robustness is characterized by comprising the following steps:
step 1: preparing a sensor by adopting a laser-induced graphene process to form a sensing layer;
step 2: pouring silica gel on the sensor, and permeating the silica gel into the porous and loose graphene under the action of gravity;
and step 3: after the silica gel is solidified into a film, stripping the sensor from a substrate adopted by a light-induced graphene process;
and 4, step 4: inverting the sensor, pouring silica gel at the bottom of the sensor and curing the silica gel to form a film to form a cross-linked adhesion structure of the silica gel-wrapped sensing layer;
and 5: and preparing a conductive layer fixedly connected with the sensor.
2. The method for preparing electronic skin with high water resistance and robustness according to claim 1, wherein a PI substrate is adopted in the laser-induced graphene process, PPI of laser engraving is set to be 1000, laser engraving power is 25-30W, and laser engraving speed is set to be 0.5-1.0 cm/s.
3. The method for preparing electronic skin with high water resistance and robustness according to claim 1, wherein a hardening agent is added to the silica gel.
4. The method for preparing high water resistance and robustness of electronic skin according to claim 1, wherein the conductive layer is prepared by fixing copper wires on a graphene sensor by using conductive silver paste.
5. An electronic skin prepared according to the method of any one of claims 1-4.
6. An electronic skin prepared according to the method of any one of claims 1-4 for use in stress testing.
7. An electronic skin prepared according to the method of any one of claims 1-4 for use in temperature sensing.
8. An electronic skin prepared according to any one of claims 1-4 for use in deformation testing.
9. An electronic skin prepared according to any one of claims 1-4 for use in pulse perception detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110403021.8A CN113108841A (en) | 2021-04-15 | 2021-04-15 | Electronic skin with high water resistance and robustness and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110403021.8A CN113108841A (en) | 2021-04-15 | 2021-04-15 | Electronic skin with high water resistance and robustness and preparation method and application thereof |
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| CN113108841A true CN113108841A (en) | 2021-07-13 |
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| CN202110403021.8A Pending CN113108841A (en) | 2021-04-15 | 2021-04-15 | Electronic skin with high water resistance and robustness and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114577873A (en) * | 2022-02-25 | 2022-06-03 | 南京农业大学 | Water body heavy metal ion detection and recovery electrode, preparation method and detection and recovery method |
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| CN102208545A (en) * | 2011-04-18 | 2011-10-05 | 电子科技大学 | Substrate for flexible optoelectronic device and preparation method thereof |
| CN102732037A (en) * | 2011-04-08 | 2012-10-17 | 中国科学院金属研究所 | Graphene foam/polymer high-conductivity composite material preparation method and application thereof |
| CN106433131A (en) * | 2015-08-05 | 2017-02-22 | 中国科学院宁波材料技术与工程研究所 | Graphene heat conduction silica gel and preparation method thereof |
| CN107820432A (en) * | 2015-05-18 | 2018-03-20 | Bsn医疗有限公司 | The adhesion layer structure of silica gel coating |
| CN108458818A (en) * | 2018-03-09 | 2018-08-28 | 北京航空航天大学 | A kind of miniature pressure cell based on organic silica gel/three-dimensional class graphene carbon nanocomposite |
| CN109520646A (en) * | 2018-11-27 | 2019-03-26 | 安徽大学 | High-sensitivity capacitive flexible touch sensor based on three-dimensional porous microstructure composite dielectric layer and manufacturing method thereof |
| US20190231267A1 (en) * | 2017-05-31 | 2019-08-01 | Iowa State University Research Foundation, Inc. | High-resolution patterning and transferring of functional nanomaterials toward massive production of flexible, conformal, and wearable sensors of many kinds on adhesive tapes |
| CN111035400A (en) * | 2019-12-25 | 2020-04-21 | 苏州大学附属儿童医院 | Flexible sensor for detecting skin expansion tension and use method thereof |
| CN211024794U (en) * | 2019-07-18 | 2020-07-17 | 南京鼓楼医院 | Artificial cochlea electrode |
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2021
- 2021-04-15 CN CN202110403021.8A patent/CN113108841A/en active Pending
Patent Citations (9)
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| CN102732037A (en) * | 2011-04-08 | 2012-10-17 | 中国科学院金属研究所 | Graphene foam/polymer high-conductivity composite material preparation method and application thereof |
| CN102208545A (en) * | 2011-04-18 | 2011-10-05 | 电子科技大学 | Substrate for flexible optoelectronic device and preparation method thereof |
| CN107820432A (en) * | 2015-05-18 | 2018-03-20 | Bsn医疗有限公司 | The adhesion layer structure of silica gel coating |
| CN106433131A (en) * | 2015-08-05 | 2017-02-22 | 中国科学院宁波材料技术与工程研究所 | Graphene heat conduction silica gel and preparation method thereof |
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| CN108458818A (en) * | 2018-03-09 | 2018-08-28 | 北京航空航天大学 | A kind of miniature pressure cell based on organic silica gel/three-dimensional class graphene carbon nanocomposite |
| CN109520646A (en) * | 2018-11-27 | 2019-03-26 | 安徽大学 | High-sensitivity capacitive flexible touch sensor based on three-dimensional porous microstructure composite dielectric layer and manufacturing method thereof |
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| CN114577873A (en) * | 2022-02-25 | 2022-06-03 | 南京农业大学 | Water body heavy metal ion detection and recovery electrode, preparation method and detection and recovery method |
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Application publication date: 20210713 |