CN115366510B - Artificial bionic skin and application thereof - Google Patents
Artificial bionic skin and application thereof Download PDFInfo
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- CN115366510B CN115366510B CN202210580710.0A CN202210580710A CN115366510B CN 115366510 B CN115366510 B CN 115366510B CN 202210580710 A CN202210580710 A CN 202210580710A CN 115366510 B CN115366510 B CN 115366510B
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Abstract
The invention discloses artificial bionic skin and application thereof. The electrode comprises a supermolecule hydrogel electrolyte film, an electrode a arranged above the supermolecule hydrogel electrolyte film, a top insulating protective layer arranged above the electrode a, an electrode b arranged below the supermolecule hydrogel electrolyte film, and a bottom insulating protective layer arranged below the electrode b; the supermolecular hydrogel electrolyte film consists of a supermolecular hydrogel system and a plasticizer. The artificial bionic skin provided by the invention breaks through the limitation of rigid electronic equipment in the aspects of ductility, damage reconfigurability, multiple functions and the like, has the advantages of wide working range, wide mechanical property, multiple sense functions, perfect damage reconfigurability, recoverability and the like, and has the same various properties as the initial bionic skin in the aspects of mechanical property, environmental stability and the like after recovery and damage reconfigurability, and the artificial bionic skin can be applied to the directions of health monitoring, human-computer interaction interfaces and the like.
Description
Technical Field
The invention relates to a photoelectric functional material and the application field thereof, in particular to artificial bionic skin and the application thereof.
Background
Human-computer interaction refers to the process of information exchange between a person and a computer for completing a certain task using a certain dialogue language between the person and the computer. Human-machine interfaces offer the opportunity for interaction between users and robots, which is of great interest due to their great potential in many application areas, such as extreme environmental operations, rescue and fire relief, prosthetic or exoskeleton control, etc. Despite substantial progress in the development of human-machine interface systems and devices, most rely on rigid electronic devices that have limitations in terms of extensibility, comfort, damage reconfigurability, and multiple sensory capabilities.
As the largest sensing organ of a living body, the skin not only protects the body of a natural living body, but also can reliably provide various feedback information about the surrounding environment for a long period of time. As a powerful competitor of the man-machine interaction interface, the artificial bionic skin with better ductility and self-healing property and multiple sense functional force is a simulation of the biological skin function. Information conduction in biological skin systems has been reported to rely primarily on the remote transport of ions. Inspired by biological systems, hydrogels based on ionic conduction greatly expand the options for artificial biomimetic skin, as the high water content of hydrogels ensures fast transport of ions and broad spectrum mechanical properties. However, they are less sensitive to multiple senses other than pressure and strain than natural skin, and do not provide multiple senses like real skin, including temperature, solvents, bioelectric signals, and the like. Moreover, most of hydrogel-based artificial bionic skin is obtained by using pure water solvent, which inevitably freezes moisture in low-temperature natural environment, losing mechanical flexibility; meanwhile, the water in the air can be evaporated into hard solid after being placed for a long time, and the working capacity is lost. More importantly, the artificial bionic skin prepared at present is often healed by means of external energy after being damaged, the repair time is long, and the original state is difficult to recover 100%. In order to cope with more realistic natural use environments, it is desirable to develop an advanced functional human-computer interaction interface based on artificial bionic skin, which can better integrate multiple functions, including a wider working range, a wide mechanical flexibility, multiple sensing functions, excellent damaged reconstruction capability, recyclable characteristics and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides artificial bionic skin and application thereof.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
an artificial bionic skin comprises a supermolecule hydrogel electrolyte film, an electrode a arranged above the supermolecule hydrogel electrolyte film, a top insulating protective layer arranged above the electrode a, an electrode b arranged below the supermolecule hydrogel electrolyte film, and a bottom insulating protective layer arranged below the electrode b; the supermolecular hydrogel electrolyte film consists of a supermolecular hydrogel system and a plasticizer.
Further, the top insulating protective layer and the bottom insulating protective layer are made of one of VHB adhesive tape, plastic, rubber or elastomer; the electrode a and the electrode b are inert electrodes or active electrodes.
Further, the plasticizer comprises one or more of aliphatic dibasic acid esters, phthalic acid esters, benzene polyacid esters, benzoic acid esters, polyhydric alcohol esters, chlorinated hydrocarbons, epoxy compounds, citric acid esters and polyesters.
Further, the phthalic acid esters are phthalic acid esters or terephthalic acid esters.
Further, the preparation method of the supermolecular hydrogel electrolyte film comprises the following steps:
step 1, dispersing polymerizable supermolecular monomers and plasticizers in water, and stirring at constant temperature to obtain uniform precursor liquid;
and step 2, adding an initiator into the precursor liquid to initiate polymerization, so as to obtain the supermolecule hydrogel electrolyte film.
Further, in step 1
The polymerizable supermolecular monomer is at least two of anionic, cationic, or zwitterionic; and the mole fraction in the precursor liquid is 0.1-10 mole; the molar ratio of the polymerizable supermolecular monomer to the plasticizer is 1-1000:1; stirring at constant temperature of 30-100 deg.c for 10-1000 min.
Further, the initiator in the step 2 is a photoinitiator or a thermal initiator, and the mass concentration of the initiator in the precursor solution is 0.05-0.5%; the step of initiating polymerization is specifically: injecting into a reaction tank composed of parallel glass plates with interval of 0.01-5 mm at speed of 0.1-5 cm/s, and polymerizing under photopolymerization or thermal polymerization condition for 5-8 hr.
The artificial bionic skin is applied to a health monitoring sensor or a human-computer interaction interface.
A man-machine interaction interface comprises the artificial bionic skin, a singlechip module, a Bluetooth module, a power management module and a robot; the singlechip module in the man-machine interaction interface comprises an information acquisition system, a processing system and a control system; in the processing system, the resistance change of the artificial bionic skin is converted into voltage change through a voltage dividing circuit, and the voltage change is read through 7 general programmable input/output (GP I/O) ports and a 10-bit analog-to-digital converter (ADC) on a microcontroller; the system with 7 GP I/O ports with ADC in the control system forms a 14 byte message and sends the 14 byte message to the Bluetooth module in the man-machine interaction interface through the universal asynchronous receiver/transmitter; the Bluetooth module receives and analyzes the signals and sends instructions to the robot through Bluetooth; and the power management module provides power for the whole human-computer interaction interface.
The beneficial effects are that:
compared with the prior art, the artificial bionic skin disclosed by the invention breaks through the limitation of rigid electronic equipment in the aspects of ductility, damage reconfigurability, multiple functions and the like, has wide excellent mechanical properties including flexible reconfigurability after skin damage, extremely high stretchability and recyclability, excellent environmental stability, multiple sensory properties including the like, and is similar to natural skin. As an interactive human-machine interface, sensory stimuli identifying stress, strain, temperature, solvent and bioelectricity are collected and distinguished, and human actions are reduced in real time after programming treatment so as to replace human beings to perform dangerous actions.
Drawings
FIG. 1 is a graph showing the stress-strain curve test of the supramolecular hydrogel electrolyte according to example 1 of the present invention;
FIG. 2 is a graph showing the measurement result of the artificial bionic skin versus tension in example 2 of the present invention;
FIG. 3 is a graph showing the results of pressure detection by artificial bionic skin in example 2 of the present invention;
FIG. 4 is a graph showing the results of temperature measurements of artificial skin in example 2 of the present invention;
FIG. 5 is a graph showing the results of the detection of solvent molecules by the artificial simulated skin in example 2 of the present invention;
FIG. 6 is a scene application diagram of a human-computer interaction interface of the artificial bionic skin in embodiment 3 of the present invention;
FIG. 7 is a schematic diagram of the structure of the artificial bionic skin according to the present invention, wherein the 1-top layer is an insulating protective layer, the 2-electrode a, the 3-supramolecular hydrogel electrolyte film, the 4-electrode b, and the 5-bottom layer are insulating protective layers;
FIG. 8 is a graph showing the stress-strain curve after hydrolysis and reconstitution of artificial bionic skin in example 2 of the present invention;
fig. 9 is a graph showing environmental stability after hydrolysis and reconstitution of artificial bionic skin in example 2 of the present invention.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
EXAMPLE 1 preparation of supramolecular hydrogel electrolyte films
(1) 1 g of Acrylic Acid (AA), 1 g of zwitterionic (3- [ dimethyl- [3- (2-methylprop-2-enylamino) propyl ] azaammonio ] propane-1-sulfonate (PDP), 1 g of plasticizing agent Choline Chloride (CCL) are dispersed in 1 ml of deionized water, and stirred at 500rpm at room temperature until a uniform and transparent mixed solution is obtained;
(2) Adding 0.1 g of thermal initiator Ammonium Persulfate (APS) into the mixed solution in the step (1), and stirring at a rotating speed of 500rpm for 5 minutes under a light-shielding condition to obtain a uniform solution;
(3) And (3) injecting the mixed solution in the step (2) into a glass die with an interval of 1 mm, and performing photopolymerization in an ultraviolet crosslinking instrument for 10 hours to obtain the supermolecular hydrogel electrolyte film.
The mechanical property test of the hydrogel electrolyte film adopts a universal tensile machine test, and the test method comprises the following steps:
a, testing the thickness and the width of a hydrogel electrolyte film test piece by using a vernier caliper, and recording data;
b selecting a stretching rate of 10mm min -1 ；
c, selecting a proper clamp, adjusting the distance of the clamp and clamping the hydrogel electrolyte film sample;
d, zeroing the test data and starting to stretch the hydrogel electrolyte film;
e breaking the hydrogel electrolyte film sample and reading out the maximum load and the tensile elongation value;
f repeating the steps for a plurality of times to obtain the average value of the mechanical properties of the hydrogel electrolyte film.
The mechanical properties of the supramolecular hydrogel electrolyte films obtained in example 1 are shown in FIG. 1, from which it can be seen that the addition of CCL helps to reduce the tensile modulus of the supramolecular hydrogel electrolyte films. As the CCL content increases, the tensile modulus of the supramolecular hydrogel electrolyte film decreases from 200 kilopascals to less than 50 kilopascals. At the same time, the stretchability of the material gradually increased, and the maximum stretch (130 times or more) was obtained at a CCL content of 25 wt%.
EXAMPLE 2 preparation of Artificial bionic skin
The resistive artificial bionic skin is prepared by using the supermolecular hydrogel electrolyte film of the embodiment 1, and the specific structure is shown in fig. 1, an electrode a (copper patch) and an electrode b (copper patch) are firstly placed on the hydrogel electrolyte film, a VHB tape is stuck on the electrode a (copper patch) to serve as a top insulating protective layer, a VHB tape is stuck on the electrode b (copper patch) to serve as a bottom insulating protective layer, and the VHB tape/the electrode a/the hydrogel electrolyte film/the electrode b/the VHB tape are formed to form the resistive artificial bionic skin.
The prepared resistance type artificial bionic skin is subjected to sensor monitoring, and experiments prove that the specific process is as follows:
for pressure detection, placing the artificial bionic skin on a black table, connecting a test end, then applying pressure with different pressures to the artificial bionic skin, and observing the change of a resistance signal of the test end;
for tension detection, placing the artificial bionic skin on a black table, connecting a test end, then applying different stretching forces to the artificial bionic skin, and observing the change of a resistance signal of the test end;
for temperature detection, placing the artificial bionic skin on a black table, connecting a test end, then changing the ambient temperature around the artificial bionic skin, and observing the change of a resistance signal of the test end;
for solvent detection, placing the artificial bionic skin on a black table, connecting a test end, then dripping an acetone solvent on the artificial bionic skin, and observing the change of a resistance signal of the test end;
the specific results are shown in FIGS. 2-5.
From fig. 2 and 3, it can be obtained that the prepared artificial bionic skin has good response to pressure and tension, and simply speaking, the resistivity change rate also becomes larger with the increase of the force;
as can be derived from fig. 4, the response of the artificial bionic skin to temperature is a negative correlation, and the resistance decreases with the increase of temperature;
as can be derived from fig. 5, the artificial bionic skin can distinguish between the organic solvents acetone and aqueous solutions;
the prepared resistance type artificial bionic skin is subjected to hydrolysis reconstruction experiments, and the specific process of the experiments is as follows:
a, placing the resistance type artificial bionic skin in a large amount of deionized water solution, wherein the concentration of the artificial bionic skin in the water solution is not higher than 1 mg/ml;
b, heating and stirring the deionized water solution containing the artificial bionic skin at the temperature of 60 ℃ and the stirring speed of 1000 revolutions per minute;
c, stopping stirring and heating after the artificial bionic skin is thoroughly dissolved in deionized water, placing the solution in a temperature box at 60 ℃ to remove part of deionized water, and keeping the humidity in the temperature box to be 25%;
as can be derived from fig. 8, the stretching ratio of the artificial bionic skin is unchanged before and after reconstruction;
the mechanical property test of the reconstructed artificial bionic skin adopts a universal tensile machine test, and the test method is as follows
a, testing the thickness and the width of a hydrogel electrolyte film test piece by using a vernier caliper, and recording data;
b selecting a stretching rate of 10mm min -1 ；
c, selecting a proper clamp, adjusting the distance of the clamp and clamping the hydrogel electrolyte film sample;
d, zeroing the test data and starting to stretch the hydrogel electrolyte film;
e breaking the hydrogel electrolyte film sample and reading out the maximum load and the tensile elongation value;
f repeating the steps for a plurality of times to obtain the average value of the mechanical properties of the hydrogel electrolyte film.
The thermogravimetric analyzer is used for the thermogravimetric performance test of the artificial bionic skin after reconstruction, and the test method is as follows
a, adjusting the temperature (25-500 ℃) required by the experiment at a parameter setting interface, and increasing the temperature rate (10 DEG/min);
b, weighing 5 mg of the reconstructed artificial bionic skin sample, and adding the reconstructed artificial bionic skin sample into a crucible;
c, simultaneously adding the crucible with the sample and the blank comparison crucible into a thermogravimetric analyzer, and starting to heat up and record data;
as can be seen from fig. 9, the artificial bionic skin still maintains good stability after being reconstructed.
Example 3 preparation of human-computer interaction device
The resistance type artificial bionic skin prepared in the embodiment 2 is used as a man-machine interaction interface, and a man-machine interaction device is formed by combining a robot module, wherein the specific structure comprises the artificial bionic skin, a single chip Microcomputer (MCU) module, a Bluetooth module, a power management module and a robot; the singlechip module in the man-machine interaction interface comprises an information acquisition system, a processing system and a control system; in a processing system of the singlechip module, the resistance change of the artificial bionic skin is converted into voltage change through a voltage dividing circuit, and the voltage change is read through 7 general programmable input/output (GP I/O) ports and a 10-bit analog-to-digital converter (ADC) on a microcontroller; a system with 7 GP I/O ports with ADC in a control system of the singlechip module forms a 14-byte message, and sends the message to a Bluetooth module in a man-machine interaction interface through a universal asynchronous receiver/transmitter; the Bluetooth module of the man-machine interaction interface receives and analyzes the signals and sends instructions to the robot through Bluetooth; the power management module in the man-machine interaction interface provides power for the whole man-machine interaction system.
And verifying the performance of the prepared man-machine interaction device, wherein the specific process is as follows:
under the power supply of the power supply, a program is written in, and the Bluetooth module automatically converts input data into a Bluetooth format and then sends the Bluetooth data to a pairing Bluetooth module connected with the robot. The receiver analyzes the signal and sends an instruction to the robot through Bluetooth;
the specific result is shown in fig. 6, wherein fig. 6a shows that the human and the robot lift the left hand at the same time; wherein fig. 6b is a person lifting the right hand at the same time as the robot; wherein fig. 6c is a person squatting at the same time as the robot; wherein fig. 6d is a person standing simultaneously with the robot; wherein fig. 6e is a left turn of the person and robot simultaneously; wherein figure 6f shows a person performing push-ups simultaneously with a robot. It can be seen that the deformation under the action of the human body generates resistance change corresponding to the force, the robot is controlled by the module to generate the same action as the human body, and the robot replaces the human body to perform some complex dangerous scene application.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (4)
1. The artificial bionic skin is characterized by comprising a supermolecule hydrogel electrolyte film, an electrode a arranged above the supermolecule hydrogel electrolyte film, a top insulating protective layer arranged above the electrode a, an electrode b arranged below the supermolecule hydrogel electrolyte film and a bottom insulating protective layer arranged below the electrode b;
the supermolecular hydrogel electrolyte film consists of a supermolecular hydrogel system and a plasticizer;
the preparation method of the supermolecular hydrogel electrolyte film comprises the following steps:
(1) 1 g of acrylic acid, 1 g of zwitterionic (3- [ dimethyl- [3- (2-methylprop-2-enylamino) propyl ] aza-ammonio ] propane-1-sulfonate, 1 g of plasticizing agent choline chloride are dispersed in 1 ml of deionized water, and stirring is carried out at a speed of 500rpm at room temperature until a uniform and transparent mixed solution is obtained;
(2) Adding 0.1 g of thermal initiator ammonium persulfate into the mixed solution in the step (1), and stirring at a rotating speed of 500rpm for 5 minutes under a light-shielding condition to obtain a uniform solution;
(3) And (3) injecting the mixed solution in the step (2) into a glass die with an interval of 1 mm, and performing photopolymerization in an ultraviolet crosslinking instrument for 10 hours to obtain the supermolecular hydrogel electrolyte film.
2. The artificial simulated skin according to claim 1, wherein the top and bottom insulating protective layers are made of one of VHB tape, plastic or elastomer; the electrode a and the electrode b are inert electrodes or active electrodes.
3. Use of artificial bionic skin according to claim 1 or 2 in a health monitoring sensor or a human-computer interaction interface.
4. A man-machine interaction interface, which is characterized by comprising the artificial bionic skin, a singlechip module, a Bluetooth module, a power management module and a robot according to any one of claims 1-3;
the singlechip module in the man-machine interaction interface comprises an information acquisition system, a processing system and a control system; in the processing system, the resistance change of the artificial bionic skin is converted into voltage change through a voltage dividing circuit, and the voltage change is read through 7 general programmable input/output (GP I/O) ports and a 10-bit analog-to-digital converter (ADC) on a microcontroller;
the control system comprises 7 input/output GP I/O ports with converters ADC, wherein the system forms a 14-byte message and sends the 14-byte message to a Bluetooth module in a human-computer interaction interface through a universal asynchronous receiver/transmitter;
the Bluetooth module receives and analyzes the signals and sends instructions to the robot through Bluetooth;
and the power management module provides power for the whole human-computer interaction interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210580710.0A CN115366510B (en) | 2022-05-26 | 2022-05-26 | Artificial bionic skin and application thereof |
| PCT/CN2022/107629 WO2023226184A1 (en) | 2022-05-26 | 2022-07-25 | Artificial bionic skin and application thereof |
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| CN202210580710.0A CN115366510B (en) | 2022-05-26 | 2022-05-26 | Artificial bionic skin and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113185735A (en) * | 2021-06-16 | 2021-07-30 | 南京邮电大学 | Anti-freezing supramolecular hydrogel electrolyte film and preparation and application thereof |
| CN113730028A (en) * | 2021-09-06 | 2021-12-03 | 南京邮电大学 | Artificial intelligence skin and preparation method and application thereof |
| CN114063782A (en) * | 2021-11-19 | 2022-02-18 | 南京邮电大学 | Intelligent man-machine interaction sensing device based on MXene/PAA hydrogel |
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| WO2016181038A1 (en) * | 2015-05-08 | 2016-11-17 | Teknologian Tutkimuskeskus Vtt Oy | Artificial skin cell structure and production method thereof |
| CN109631957A (en) * | 2019-01-14 | 2019-04-16 | 南方科技大学 | A kind of stretchable hypersensitive electronic skin and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113185735A (en) * | 2021-06-16 | 2021-07-30 | 南京邮电大学 | Anti-freezing supramolecular hydrogel electrolyte film and preparation and application thereof |
| CN113730028A (en) * | 2021-09-06 | 2021-12-03 | 南京邮电大学 | Artificial intelligence skin and preparation method and application thereof |
| CN114063782A (en) * | 2021-11-19 | 2022-02-18 | 南京邮电大学 | Intelligent man-machine interaction sensing device based on MXene/PAA hydrogel |
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