CN115452206B - Ultralow-temperature capacitive pressure sensor and preparation method thereof - Google Patents
Ultralow-temperature capacitive pressure sensor and preparation method thereof Download PDFInfo
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- CN115452206B CN115452206B CN202211001778.5A CN202211001778A CN115452206B CN 115452206 B CN115452206 B CN 115452206B CN 202211001778 A CN202211001778 A CN 202211001778A CN 115452206 B CN115452206 B CN 115452206B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 36
- 239000000806 elastomer Substances 0.000 claims abstract description 36
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 13
- 239000001257 hydrogen Substances 0.000 claims abstract description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000004806 packaging method and process Methods 0.000 claims abstract description 11
- 230000003993 interaction Effects 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 14
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 11
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 11
- -1 polydimethylsiloxane Polymers 0.000 claims description 11
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 10
- CWZPGMMKDANPKU-UHFFFAOYSA-L butyl-di(dodecanoyloxy)tin Chemical compound CCCC[Sn+2].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O CWZPGMMKDANPKU-UHFFFAOYSA-L 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000007731 hot pressing Methods 0.000 claims description 9
- XUMIQAOMRDRPMD-UHFFFAOYSA-N (6-oxo-1h-pyrimidin-2-yl)urea Chemical compound NC(=O)NC1=NC(=O)C=CN1 XUMIQAOMRDRPMD-UHFFFAOYSA-N 0.000 claims description 7
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 7
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 5
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052733 gallium Inorganic materials 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- VCCBEIPGXKNHFW-UHFFFAOYSA-N biphenyl-4,4'-diol Chemical group C1=CC(O)=CC=C1C1=CC=C(O)C=C1 VCCBEIPGXKNHFW-UHFFFAOYSA-N 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000035876 healing Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
- B32B2255/205—Metallic coating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention belongs to the field of electronic skin at ultralow temperature, and particularly relates to an ultralow temperature capacitive pressure sensor and a preparation method thereof, wherein the pressure sensor consists of a basal layer, an electrode layer, a pressure sensitive layer, an electrode layer and a packaging layer from bottom to top; wherein, the basal layer, the pressure sensitive layer and the packaging layer are all elastic bodies with high ductility at ultralow temperature; the dynamic supermolecular network constructed in the elastomer skeleton consists of one or more of four-fold hydrogen bond, strong hydrogen bond, weak hydrogen bond, disulfide bond, metal coordination bond, ionic bond and main guest interaction; the electrode layer comprises an elastomer, liquid metal and silver flake powder. The capacitive pressure sensor can accurately respond to different weights and actions (finger bending and the like) at ultralow temperature (-80 ℃).
Description
Technical Field
The invention belongs to the field of electronic skin at ultralow temperature, and particularly relates to an ultralow temperature capacitive pressure sensor and a preparation method thereof.
Background
The electronic skin is a novel electronic device which simulates the human skin to feel external stimulus (pressure, temperature and humidity) through the integration and feedback of electrical signals. Electronic skin as a flexible touch bionic sensor has been widely used in the fields of human physiological parameter detection, robot touch perception and the like. The most fundamental element of tactile sensing is pressure sensing, and pressure sensing is therefore the fundamental property of electronic skin. According to the different working principles, the pressure sensor can be mainly divided into a resistance type pressure sensor, a capacitance type pressure sensor and a piezoelectric type pressure sensor. Among them, capacitive pressure sensors can provide higher accuracy, lower power consumption, better stability and consistency, and have recently become a hotspot of widespread attention for researchers around the world.
However, the conventional capacitive pressure sensor can only meet the requirement of accurate response at room temperature, and the capacitive pressure sensor with response at ultralow temperature has not been reported, so that exploration of ultralow temperature (polar region, high altitude and the like) is seriously hindered, and therefore, development and application of electronic skin of the ultralow temperature capacitive pressure sensor are very important.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an ultralow-temperature capacitive pressure sensor and a preparation method thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An ultralow-temperature capacitive pressure sensor consists of a basal layer, an electrode layer, a pressure-sensitive layer, an electrode layer and a packaging layer from bottom to top; wherein, the basal layer, the pressure sensitive layer and the packaging layer are all elastic bodies with high ductility at ultralow temperature; the dynamic supermolecular network constructed in the elastomer skeleton consists of one or more of four-fold hydrogen bond, strong hydrogen bond, weak hydrogen bond, disulfide bond, metal coordination bond, ionic bond and main guest interaction; the electrode layer comprises an elastomer, liquid metal and silver flake powder.
The elastomer is a quadruple hydrogen bond group polydimethylsiloxane elastomer.
The quadruple hydrogen bond-based polydimethylsiloxane elastomer is prepared by the following steps: heating the polydimethylsiloxane oil bath, and vacuumizing and stirring; adding isophorone diisocyanate, tetrahydrofuran and a catalytic amount of butyl tin dilaurate after stirring;
Continuously stirring, then adding 2-ureido-4-pyrimidinone, 4' -dihydroxybiphenyl, dimethyl sulfoxide and catalyst amount of butyl tin dilaurate, and continuously polymerizing to obtain a product;
wherein the polydimethylsiloxane: the molar ratio of isophorone diisocyanate is: 4:6, preparing a base material; 4' -dihydroxybiphenyl: the molar ratio of the 2-ureido-4-pyrimidinone is 0.6 to 1.2:0.8-1.4.
The mass ratio of the elastomer to the liquid metal to the silver flake powder in the electrode layer is 1:1-10:1-10.
The invention also comprises a preparation method of the ultralow temperature capacitive pressure sensor, which comprises the following steps:
(1) Carrying out hot pressing on the elastomer to prepare a sensor substrate layer with the thickness of about 1 mm;
(2) The elastomer, the liquid metal and the silver flake powder are dissolved in a solvent according to a proportion, and are printed on the basal layer in the step (1), and the basal layer is dried at room temperature;
(3) Pressing the high-ductility elastomer into a sensor pressure-sensitive layer with the thickness of about 0.5mm by hot pressing, and flatly paving the sensor pressure-sensitive layer on the electrode layer in the step (2);
(4) Printing the mixed solution of the elastomer, the liquid metal and the silver flake powder prepared in the step (2) onto the pressure-sensitive layer in the step (3) again;
(5) And (3) hot pressing the high-ductility elastomer into a sensor packaging layer with the thickness of about 0.5mm, and flatly paving the sensor packaging layer on the electrode layer in the step (2).
The liquid metal in the step (2) is gallium.
The solvent in the step (2) is one or more than two of ethanol, dichloromethane, ethyl acetate, tetrahydrofuran, N-dimethylformamide and N, N-dimethylacetamide.
The invention also comprises application of the ultralow temperature capacitive pressure sensor to preparation of ultralow temperature electronic skin.
Compared with the prior art, the invention has the beneficial effects that:
(1) The accurate response at room temperature is only satisfied compared to the conventional capacitive pressure sensor. The capacitive pressure sensor can accurately respond to different weights and actions (finger bending and the like) at ultralow temperature (-80 ℃).
(2) The stretchability is poor compared to the conventional capacitive pressure sensor. The capacitive pressure sensor can exhibit high ductility at ultra-low temperatures (-80 ℃).
(3) Compared with the traditional capacitive pressure sensor, the capacitive pressure sensor has no response after stretching, and can still show accurate response to different weights after stretching for 100 percent at ultralow temperature (-80 ℃). This will greatly facilitate exploration of ultra-low temperature areas (polar, high altitude, etc.).
(4) An elastomer with high ductility at ultralow temperature is used as a basal layer, a pressure-sensitive layer and a packaging layer of the capacitive pressure sensor; the design gives the capacitive pressure sensor beneficial ductility at low temperature and accurate response to motion and weight by using a mixed solution of an elastomer, a liquid metal and silver flake powder having high ductility at ultra-low temperature as an electrode layer.
Drawings
FIG. 1 is a structural design diagram of an ultra-low temperature capacitive pressure sensor.
Fig. 2 is a real-life representation of an ultra-low temperature capacitive pressure sensor.
Fig. 3 is a graph showing the continuous response results of the capacitive pressure sensor of example 1 at ultra-low temperatures.
Fig. 4 is a graph showing the same weight continuous response result at ultra-low temperature of the capacitive pressure sensor of example 1.
Fig. 5 is a graph showing the finger bending response at ultralow temperature of the capacitive pressure sensor in example 1.
FIG. 6 is a graph showing the continuous response of 100% tensile weight at ultra-low temperature for the capacitive pressure sensor of example 1.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present invention.
Example 1: preparation of elastomer P1: the method specifically comprises the following steps: (1) Polydimethylsiloxane (5.6 g) was stirred for 1 hour at 100℃under vacuum. After stirring, the system was cooled to 70℃and isophorone diisocyanate (0.3891 g), tetrahydrofuran (10 mL) and butyl tin dilaurate (about 4 drops) were added as catalyst. After 3 hours, 2-ureido-4-pyrimidinone (0.0338 g), 4' -dihydroxybiphenyl (0.0558 g) dimethyl sulfoxide (2 mL) and the catalyst butyl tin dilaurate (about 1 drop) were added, discharged into water after 3 hours, dried and collected for later use.
The setting parameters of the temperature-controllable stretcher are as follows: the stretching rate was 20mm/min and the ambient temperature was-80 ℃. The test specimens were previously made into dumbbell shapes with a middle portion of about 5mm wide, a length of about 4mm and a thickness of about 1mm. The test results show that the P1 has the stress intensity of 9.31Mpa and the elongation of 1437 percent at the temperature of-80 ℃ and the healing efficiency is about 42 percent after healing for 48 hours.
Preparation of elastomer P2: (1) Polydimethylsiloxane (5.6 g) was stirred for 1 hour at 100℃under vacuum. After stirring, the system was cooled to 70℃and isophorone diisocyanate (0.3891 g), tetrahydrofuran (10 mL) and butyl tin dilaurate (about 4 drops) were added as catalyst. After 3 hours, 2-ureido-4-pyrimidinone (0.0507 g), 4' -dihydroxybiphenyl (0.0372 g) dimethyl sulfoxide (2 mL) and the catalyst butyl tin dilaurate (about 1 drop) were added, discharged into water after 3 hours, dried and collected for later use.
The setting parameters of the temperature-controllable stretcher are as follows: the stretching rate was 20mm/min and the ambient temperature was-80 ℃. The test specimens were previously made into dumbbell shapes with a middle portion of about 5mm wide, a length of about 4mm and a thickness of about 1mm. The test result shows that the P2 has the stress intensity of 12.56Mpa and the elongation of 2472 percent at the temperature of-80 ℃ and the healing efficiency is about 65 percent after healing for 48 hours.
Preparation of elastomer P3: (1) Polydimethylsiloxane (5.6 g) was stirred for 1 hour at 100℃under vacuum. After stirring, the system was cooled to 70℃and isophorone diisocyanate (0.3891 g), tetrahydrofuran (10 mL) and butyl tin dilaurate (about 4 drops) were added as catalyst. After stirring for 3 hours, 2-ureido-4-pyrimidinone (0.0592 g), 4' -dihydroxybiphenyl (0.0279 g) dimethyl sulfoxide (2 mL) and the catalyst butyl tin dilaurate (about 1 drop) were added, discharged into water after 3 hours, dried and collected for later use.
The setting parameters of the temperature-controllable stretcher are as follows: the stretching rate was 20mm/min and the ambient temperature was-80 ℃. The test specimens were previously made into dumbbell shapes with a middle portion of about 5mm wide, a length of about 4mm and a thickness of about 1mm. The test result shows that the P3 has the stress intensity of 13.01Mpa and the elongation of 2042 percent at the temperature of-80 ℃ and the healing efficiency is about 51 percent after 48 hours of healing.
The test, P2, is the best embodiment, and the elastomer is used to prepare the ultra-low temperature capacitive pressure sensor, which comprises the following steps:
example 1:
(1) Performing hot pressing on 2g of the elastomer P2 to prepare a sensor substrate layer with the thickness of about 1mm;
(2) Dissolving an elastomer P2, liquid gallium and silver flake powder in a solvent ethyl acetate according to a ratio of (1:5:5) to form a mixed solution, printing the mixed solution onto a substrate layer in the step (1), and airing at room temperature;
(3) Preparing a sensor pressure-sensitive layer with the thickness of about 0.5mm by hot-pressing the high-ductility elastomer P2, and flatly paving the sensor pressure-sensitive layer on the electrode layer in the step (2);
(4) Printing the mixed solution prepared in the step (2) onto the pressure-sensitive layer in the step (3) again;
(5) Hot pressing the high-ductility elastomer into a sensor pressure-sensitive layer with the thickness of 0.5mm, and flatly paving the sensor pressure-sensitive layer on the electrode layer in the step (4);
FIG. 1 is a structural design diagram of an ultra-low temperature capacitive pressure sensor. Fig. 2 is a real-life representation of an ultra-low temperature capacitive pressure sensor. Fig. 3 is a graph showing the continuous response results of the capacitive pressure sensor of example 1 at ultra-low temperatures. Fig. 4 is a graph showing the same weight continuous response result at ultra-low temperature of the capacitive pressure sensor of example 1. Fig. 5 is a graph showing the finger bending response at ultralow temperature of the capacitive pressure sensor in example 1. FIG. 6 is a graph showing the continuous response of 100% tensile weight at ultra-low temperature for the capacitive pressure sensor of example 1.
As can be seen from fig. 1-2, the present invention uses an elastomer having high ductility at ultra-low temperature as a base layer, a pressure sensitive layer and an encapsulation layer of a capacitive pressure sensor; and the mixed solution of the elastomer, the liquid gallium and the silver flake powder is used as an electrode layer of the capacitive pressure sensor. As can be seen from FIG. 3, the prepared capacitor can respond accurately to different weights at ultra-low temperatures (-80 ℃). As can be seen from fig. 4, the prepared capacitor can have excellent stability at ultra-low temperature (-80 ℃). As can be seen from FIG. 5, the prepared capacitor can accurately respond to human body movements (finger bending, etc.) at ultra-low temperatures (-80 ℃). As can be seen from fig. 5, the prepared capacitor can exhibit high ductility at ultra-low temperatures (-80 ℃) and accurate response to various weights after stretching by 100%. This will greatly facilitate exploration of ultra-low temperature areas (polar, high altitude, etc.).
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. An ultralow-temperature capacitive pressure sensor is characterized by comprising a basal layer, an electrode layer, a pressure-sensitive layer, an electrode layer and a packaging layer from bottom to top;
Wherein, the basal layer, the pressure sensitive layer and the packaging layer are all elastic bodies with high ductility at ultralow temperature; the dynamic supermolecular network constructed in the elastomer skeleton consists of one or more of four-fold hydrogen bond, strong hydrogen bond, weak hydrogen bond, disulfide bond, metal coordination bond, ionic bond and main guest interaction;
the electrode layer comprises an elastomer, liquid metal and silver flake powder;
the elastomer is a quadruple hydrogen bond group polydimethylsiloxane elastomer;
The quadruple hydrogen bond-based polydimethylsiloxane elastomer is prepared by the following steps: heating the polydimethylsiloxane oil bath, and vacuumizing and stirring; adding isophorone diisocyanate, tetrahydrofuran and a catalytic amount of butyl tin dilaurate after stirring; continuously stirring, then adding 2-ureido-4-pyrimidinone, 4' -dihydroxybiphenyl, dimethyl sulfoxide and catalytic amount of butyl tin dilaurate, and continuously polymerizing to obtain a product;
Wherein the polydimethylsiloxane: the molar ratio of isophorone diisocyanate is: 4:6, preparing a base material; 4,4' -dihydroxybiphenyl: the molar ratio of the 2-ureido-4-pyrimidinone is 0.6 to 1.2:0.8-1.4;
The mass ratio of the elastomer to the liquid metal to the silver flake powder in the electrode layer is 1:1-10:1-10.
2. A method of manufacturing the ultra-low temperature capacitive pressure sensor of claim 1, comprising the steps of:
(1) Performing hot pressing on the elastomer to prepare a sensor substrate layer with the thickness of 1 mm;
(2) The elastomer, the liquid metal and the silver flake powder are dissolved in a solvent according to a proportion, and are printed on the basal layer in the step (1) to obtain an electrode layer, and the electrode layer is dried at room temperature;
(3) Hot pressing the high-ductility elastomer into a sensor pressure-sensitive layer with the thickness of 0.5 mm, and flatly paving the sensor pressure-sensitive layer on the electrode layer in the step (2) to obtain the pressure-sensitive layer;
(4) Printing the mixed solution of the elastomer, the liquid metal and the silver flake powder prepared in the step (2) onto the pressure-sensitive layer in the step (3) again to obtain an electrode layer;
(5) And (3) hot pressing the high-ductility elastomer into a sensor packaging layer with the thickness of 0.5mm, and flatly paving the sensor packaging layer on the electrode layer in the step (4).
3. The method for manufacturing an ultralow temperature capacitive pressure sensor according to claim 2, wherein the liquid metal in step (2) is gallium.
4. The method for manufacturing an ultralow temperature capacitive pressure sensor according to claim 2, wherein the solvent in the step (2) is one or a combination of more than two of ethanol, dichloromethane, ethyl acetate, tetrahydrofuran, N-dimethylformamide and N, N-dimethylacetamide.
5. The use of the ultra-low temperature capacitive pressure sensor of claim 1 for the preparation of ultra-low temperature electronic skin.
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| US11092563B2 (en) * | 2015-08-17 | 2021-08-17 | Technion Research & Development Foundation Limited | Self-healing platform unit for pressure and analyte sensing |
| KR102012761B1 (en) * | 2018-01-04 | 2019-10-21 | 한국과학기술연구원 | Self healing elastomer, self healing complex and self healing film |
| US11532789B2 (en) * | 2018-05-29 | 2022-12-20 | Samsung Electronics Co., Ltd. | Organic thin film including semiconducting polymer and elastomer configured to be dynamic intermolecular bonded with a metal-coordination bond and organic sensor and electronic device including the same |
| KR102476615B1 (en) * | 2018-10-22 | 2022-12-09 | 한양대학교 산학협력단 | Capacitor-type pressure sensor and method for fabricating the same |
| CN109764980B (en) * | 2019-01-30 | 2020-06-30 | 常州大学 | Preparation method of double reversible bond room temperature self-healing silicon rubber pressure sensor |
| CN111875821B (en) * | 2020-07-31 | 2021-08-17 | 盐城工学院 | Preparation method of tri-dynamic cross-linked self-repairing polyurethane and product thereof |
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| Tough and Water-Insensitive Self-Healing Elastomer for Robust Electronic Skin;Jiheong Kang;《Advance Materials》;20181231;1-8 * |
| 极端环境下自愈合仿生材料的研究进展;李瑞琪;田澍;杨静;张雷;表面技术;20220630;第51卷(第006期);14-26 * |
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| CN115452206A (en) | 2022-12-09 |
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