CN116358743A - Preparation method of hydrophobic swelling-resistant ionic gel pressure sensing device - Google Patents
Preparation method of hydrophobic swelling-resistant ionic gel pressure sensing device Download PDFInfo
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- CN116358743A CN116358743A CN202310362331.9A CN202310362331A CN116358743A CN 116358743 A CN116358743 A CN 116358743A CN 202310362331 A CN202310362331 A CN 202310362331A CN 116358743 A CN116358743 A CN 116358743A
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- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 36
- 230000008961 swelling Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000002579 anti-swelling effect Effects 0.000 claims description 17
- 150000002500 ions Chemical class 0.000 claims description 13
- 239000002243 precursor Substances 0.000 claims description 13
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 10
- 239000004800 polyvinyl chloride Substances 0.000 claims description 10
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2,2'-azo-bis-isobutyronitrile Substances N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 8
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 8
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- IQQRAVYLUAZUGX-UHFFFAOYSA-N 1-butyl-3-methylimidazolium Chemical compound CCCCN1C=C[N+](C)=C1 IQQRAVYLUAZUGX-UHFFFAOYSA-N 0.000 claims description 4
- UNRVFVIZRXNZKT-UHFFFAOYSA-N CCCCN1CN(C)C=C1.FC(F)(F)S(=O)(=O)NS(=O)(=O)C(F)(F)F Chemical compound CCCCN1CN(C)C=C1.FC(F)(F)S(=O)(=O)NS(=O)(=O)C(F)(F)F UNRVFVIZRXNZKT-UHFFFAOYSA-N 0.000 claims description 4
- 238000003760 magnetic stirring Methods 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000009210 therapy by ultrasound Methods 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 239000000499 gel Substances 0.000 abstract description 34
- 238000011161 development Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 239000008204 material by function Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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- 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
- G01L1/005—Measuring force or stress, in general by electrical means and not provided for in G01L1/06 - G01L1/22
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/43—Compounds containing sulfur bound to nitrogen
- C08K5/435—Sulfonamides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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Abstract
The invention relates to a preparation method of a hydrophobic swelling-resistant ionic gel pressure sensing device, and belongs to the field of functional materials. Most ionic gels today have a high water content and inherent swelling and ion diffusion properties, which results in limited application environments and difficulty in functioning underwater. The invention aims to solve the problem of breaking through the limitation of underwater application environment and provides a preparation method of a hydrophobic swelling-resistant ionic gel pressure sensing device. The ionic gel sensor with special functionality is mainly characterized by having hydrophobic swelling resistance and strong adhesiveness, can be used for being attached to human skin underwater for a long time, and has great development potential in the fields of underwater wearable sensors and marine communicators. Functional integration of the ionic gel is an effective way to achieve an adjustable, pressure sensing range of multiple load forms, integrating multi-modal tactile sensing capabilities into a wearable sensing device.
Description
Technical Field
The invention relates to a preparation method of a hydrophobic swelling-resistant ionic gel pressure sensing device, and belongs to the field of functional materials.
Background
The pressure sensor can convert a pressure signal into a visual electric signal for output, so that the visualization and quantification of a local physical motion state are realized, and along with the vigorous development of flexible electronic products and wearable equipment, the ionic gel has excellent electrochemical performance, good flexibility and mechanical performance, has great potential in the fields of electronic skin and man-machine interaction, and has gradually become a star material of a flexible wearable sensing device. Most ionic gels today have a high water content and inherent swelling and ion diffusion properties, which results in limited application environments and difficulty in functioning underwater. Therefore, the construction of the hydrophobic anti-swelling functional ionic gel is significant, has wide application prospect in the ocean field, and has great development potential in the fields of underwater wearable sensors and ocean communicators. The functional integration of ionic gels is an effective way to achieve an adjustable, multi-load-form pressure sensing range, integrating multi-modal tactile sensing capabilities into a wearable sensing device.
Disclosure of Invention
The invention aims to solve the problem of providing a preparation method of a hydrophobic swelling-resistant ionic gel pressure sensing device aiming at the high water content, inherent swelling property and inherent ion diffusion property of ionic gel. The ion gel sensor with special functionality is mainly characterized by breaking through the limitation of underwater application environment, realizing underwater communication of the ion gel-based sensor, and playing a role in real-time monitoring of human body state, even in the field of marine resource exploration. The preparation method of the hydrophobic anti-swelling ionic gel pressure sensor comprises the steps of firstly introducing an ionic precursor solution containing hydrophobic functional groups into a PVC (polyvinyl chloride) mould, then preparing functional ionic gel in a thermal initiation polymerization mode, connecting wires at two ends of the functional ionic gel, and packaging to obtain the hydrophobic anti-swelling functional ionic gel-based pressure sensor. The preparation method is simple and convenient, green and nontoxic, and the prepared pressure sensor has the sensing parameters of hydrophobic functionality, high sensitivity, wide linear pressure response range and the like, and can be widely applied to the fields of electronic skin, ocean development and the like.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
(1) Preparing a precursor solution: tert-butyl acrylate (t-BuA), 1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt ([ BMIm) were added in succession]TFSI), ethylene Glycol Dimethacrylate (EGDMA), 2-Azobisisobutyronitrile (AIBN), silica (SiO 2 ) Magnetic stirring and ultrasonic treatment are carried out for a specific time in the presence of nitrogen to obtain a precursor ion solution which is uniformly mixed;
(2) Selecting a mould: selecting a PVC (polyvinyl chloride) material mold with a specific size and a specific shape;
(3) Preparation of hydrophobic anti-swelling ionic gel: introducing the precursor solution prepared in the step (1) into a PVC mould, standing for a period of time under the condition of constant temperature and constant humidity, performing thermal initiation polymerization in a vacuum environment, and finally performing auxiliary drying to obtain the hydrophobic swelling-resistant ionic gel with stable performance;
(4) Preparation of a hydrophobic anti-swelling ionic gel pressure sensor: and (3) taking the hydrophobic anti-swelling ionic gel prepared in the step (3) as a sensing element, and connecting wires at two ends of the sensing element and packaging to obtain the hydrophobic anti-swelling functional ionic gel-based pressure sensor.
Preferably, the amount of t-butyl acrylate (t-BuA) used in step (1) is 0.5-5g, 1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt ([ BMIm)]TFSI) in an amount of 3-10g, ethylene Glycol Dimethacrylate (EGDMA) in an amount of 1-5mg, 2-Azobisisobutyronitrile (AIBN) in an amount of 2-10mg, silica (SiO) 2 ) The specification is nano-scale powder (15 nm), the dosage is 5-50wt% of ion precursor solution, the nitrogen gas is introduced for 10-30min, the magnetic stirring time is 5-30min, and the ultrasonic time is 2-10min.
Preferably, the dimension of the die in the step (2) is 1-3mm in inner diameter, 1-5mm in outer diameter and 1-20cm in length, and the die is made of high-transparency oil-resistant fluid PVC material.
Preferably, the precursor solution in the step (3) is used in an amount of 1-20mL, and the constant temperature and humidity conditions are clean laboratory conditions: the temperature is 25+/-5 ℃, the relative humidity is 65% +/-10% RH, the placing time of a vacuum oven is 1-4h, the temperature is 30-80 ℃, the auxiliary drying mode is vacuum drying, the drying temperature is 10-60 ℃, and the drying time is 6-24h.
Due to the adoption of the technical scheme, the method has the following beneficial effects:
(1) The main raw materials used in the preparation process of the precursor ion solution are ion liquids, and the ion liquids have the characteristics of flame resistance, difficult volatilization, excellent thermal stability, excellent electrochemical performance, environmental protection and the like, and the prepared precursor ion solution has high safety, good stability and environmental protection;
(2) The sensing element prepared by the invention is ionic gel, which is a novel polymer electrolyte with solid-liquid biphase mechanical characteristics, has excellent electrochemical performance and structural mechanical performance, and simultaneously has good biocompatibility, nonflammability, explosiveness, high conductivity, high transparency, high toughness and the like;
(3) The preparation method is convenient, green, nontoxic and pollution-free, and the prepared ion gel-based pressure sensor has high sensitivity, quick response, wide linear pressure response range and high fidelity;
(4) The hydrophobic anti-swelling ionic gel pressure sensing device prepared by the invention has the functions of hydrophobic anti-swelling and strong adhesiveness, can be used for being attached to human skin underwater for a long time, and has great development potential in the fields of underwater wearable sensors and marine communicators.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
fig. 1: the results of example 1 in the present invention are shown in the graph.
Fig. 2: the results of example 2 in the present invention are shown in the graph.
Fig. 3: the results of example 3 in the present invention are shown in the graph.
Detailed Description
The invention will now be described with reference to the drawings and specific embodiments. The technical means used in the present invention are methods well known to those skilled in the art unless specifically stated. Further, the embodiments should be construed as illustrative, and not limiting the scope of the invention, which is defined solely by the claims. Various changes or modifications to the materials ingredients and amounts used in these embodiments will be apparent to those skilled in the art without departing from the spirit and scope of the invention.
Example 1: hydrophobic anti-swelling ionic gel is prepared through a specific process flow, and is put into water together with common ionic gel for swelling degree test. As shown in FIG. 1, after 48 hours, the form and the size of the hydrophobic anti-swelling ionic gel are compared, so that the hydrophobic anti-swelling ionic gel does not swell obviously in water and can be used under water for a long time.
Example 2: the prepared hydrophobic anti-swelling ionic gel was attached to 50g of ear-washing ball and tested for adhesion with a finger. As shown in figure 2, the prepared hydrophobic swelling-resistant ionic gel can be well attached to human skin, can be easily adhered to ear washing balls with the weight of 50g, and can be firmly attached to the skin surface under water.
Example 3: the bending degree of the fingers of a human body is monitored in real time by adopting a hydrophobic swelling-resistant ionic gel pressure sensing device. As shown in fig. 3, the sensor can convert the strain signal of the human finger into an electric signal, respond to the deformation of the skin in real time and quickly, and can track and evaluate the action of the human body under water.
Claims (5)
1. A preparation method of a hydrophobic swelling-resistant ionic gel pressure sensing device comprises the following steps:
(1) Preparing a precursor solution: tert-butyl acrylate (t-BuA), 1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt ([ BMIm) were added in succession]TFSI), ethylene Glycol Dimethacrylate (EGDMA), 2-Azobisisobutyronitrile (AIBN), silica (SiO 2 ) Magnetic stirring and ultrasonic treatment are carried out for a specific time in the presence of nitrogen to obtain a precursor ion solution which is uniformly mixed;
(2) Selecting a mould: selecting a PVC (polyvinyl chloride) material mold with a specific size and a specific shape;
(3) Preparation of hydrophobic anti-swelling ionic gel: introducing the precursor solution prepared in the step (1) into a PVC mould, standing for a period of time under the condition of constant temperature and constant humidity, performing thermal initiation polymerization in a vacuum environment, and finally performing auxiliary drying to obtain the hydrophobic swelling-resistant ionic gel with stable performance;
(4) Preparation of a hydrophobic anti-swelling ionic gel pressure sensor: and (3) taking the hydrophobic anti-swelling ionic gel prepared in the step (3) as a sensing element, and connecting wires at two ends of the sensing element and packaging to obtain the hydrophobic anti-swelling functional ionic gel-based pressure sensor.
2. The method for preparing a hydrophobic swelling-resistant ionic gel pressure sensor according to claim 1, wherein the amount of t-butyl acrylate (t-BuA) used in the step (1) is 0.5-5g, 1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt ([ BMIm)]TFSI) in an amount of 3-10g, ethylene Glycol Dimethacrylate (EGDMA) in an amount of 1-5mg, 2-Azobisisobutyronitrile (AIBN) in an amount of 2-10mg, silica (SiO) 2 ) The specification is nano-scale powder (15 nm), the dosage is 5-50wt% of ion precursor solution, the nitrogen gas is introduced for 10-30min, the magnetic stirring time is 5-30min, and the ultrasonic time is 2-10min.
3. The method for preparing the hydrophobic swelling-resistant ionic gel pressure sensing device according to claim 1, wherein the dimension of the die in the step (2) is 1-3mm in inner diameter, 1-5mm in outer diameter and 1-20cm in length, and the die is made of highly transparent oil-resistant fluid PVC material.
4. The method for preparing the hydrophobic swelling-resistant ionic gel pressure sensor according to claim 1, wherein the precursor solution in the step (3) is used in an amount of 1-20mL, and the constant temperature and humidity conditions are clean laboratory conditions: the temperature is 25+/-5 ℃, the relative humidity is 65% +/-10% RH, the placing time of a vacuum oven is 1-4h, the temperature is 30-80 ℃, the auxiliary drying mode is vacuum drying, the drying temperature is 10-60 ℃, and the drying time is 6-24h.
5. The method for preparing the hydrophobic swelling-resistant ionic gel pressure sensing device according to claim 1, wherein the ionic gel in the step (4) has hydrophobic swelling resistance, strong adhesiveness and stability, can be applied to the skin of a human body under water for a long time, and the sensor is directly assembled through a wire without using an electrode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310362331.9A CN116358743A (en) | 2023-04-07 | 2023-04-07 | Preparation method of hydrophobic swelling-resistant ionic gel pressure sensing device |
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| CN202310362331.9A CN116358743A (en) | 2023-04-07 | 2023-04-07 | Preparation method of hydrophobic swelling-resistant ionic gel pressure sensing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024782A (en) * | 2023-07-07 | 2023-11-10 | 广东海洋大学 | Preparation method of hydrophobic ionic liquid conductive gel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024782A (en) * | 2023-07-07 | 2023-11-10 | 广东海洋大学 | Preparation method of hydrophobic ionic liquid conductive gel |
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