CN114878032B - Flexible self-powered pressure sensor and preparation method and application thereof - Google Patents
Flexible self-powered pressure sensor and preparation method and application thereof Download PDFInfo
- Publication number
- CN114878032B CN114878032B CN202210344248.4A CN202210344248A CN114878032B CN 114878032 B CN114878032 B CN 114878032B CN 202210344248 A CN202210344248 A CN 202210344248A CN 114878032 B CN114878032 B CN 114878032B
- Authority
- CN
- China
- Prior art keywords
- pressure sensor
- flexible self
- barium titanate
- powered
- powered pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical class [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 208000004210 Pressure Ulcer Diseases 0.000 claims abstract description 28
- 206010011985 Decubitus ulcer Diseases 0.000 claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003999 initiator Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- 238000004108 freeze drying Methods 0.000 claims abstract description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000012298 atmosphere Substances 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000011889 copper foil Substances 0.000 claims abstract description 10
- 229910052709 silver Inorganic materials 0.000 claims abstract description 10
- 239000004332 silver Substances 0.000 claims abstract description 10
- 238000004321 preservation Methods 0.000 claims abstract description 9
- 239000003960 organic solvent Substances 0.000 claims abstract description 8
- MAGFQRLKWCCTQJ-UHFFFAOYSA-N 4-ethenylbenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=C(C=C)C=C1 MAGFQRLKWCCTQJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 30
- 229910002113 barium titanate Inorganic materials 0.000 claims description 27
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 24
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 20
- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 10
- 239000003607 modifier Substances 0.000 claims description 9
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical group C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 238000009210 therapy by ultrasound Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical group CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 5
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 4
- 238000011534 incubation Methods 0.000 claims description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 claims description 2
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 2
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 20
- 239000007788 liquid Substances 0.000 description 16
- 239000011259 mixed solution Substances 0.000 description 12
- 239000002105 nanoparticle Substances 0.000 description 10
- 239000002002 slurry Substances 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 208000017667 Chronic Disease Diseases 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920002749 Bacterial cellulose Polymers 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 208000002720 Malnutrition Diseases 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 208000025865 Ulcer Diseases 0.000 description 1
- 230000004872 arterial blood pressure Effects 0.000 description 1
- 239000005016 bacterial cellulose Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 208000028867 ischemia Diseases 0.000 description 1
- 230000001071 malnutrition Effects 0.000 description 1
- 235000000824 malnutrition Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 208000015380 nutritional deficiency disease Diseases 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000036269 ulceration Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Images
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
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
- A61B5/445—Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
-
- 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
- C08F220/42—Nitriles
- C08F220/44—Acrylonitrile
- C08F220/46—Acrylonitrile with carboxylic acids, sulfonic acids or salts thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
- A61B2562/164—Details of sensor housings or probes; Details of structural supports for sensors the sensor is mounted in or on a conformable substrate or carrier
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Animal Behavior & Ethology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Dermatology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention discloses a flexible self-powered pressure sensor and a preparation method and application thereof; the method for manufacturing the flexible self-powered pressure sensor comprises the following steps: sequentially dissolving p-styrene sulfonate, acrylonitrile, a cross-linking agent, an initiator and modified barium titanate in an organic solvent, carrying out heat preservation reaction under an inert atmosphere to obtain a prepolymer, then carrying out freeze drying treatment on the prepolymer, and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor. The preparation method disclosed by the invention is simple in process, and the prepared flexible self-powered pressure sensor is good in electromechanical response and stable in mechanical property; the prepared pressure sore monitoring sensor can monitor pressure sores well.
Description
Technical Field
The invention relates to the technical field of flexible pressure sensors, in particular to a flexible self-powered pressure sensor, and a preparation method and application thereof.
Background
Pressure sores, also known as bedsores (pressure sores are designated by the pressure sores advisory group of the united states of america (NPUAP) in 2016), are due to the relatively long time that local tissue is under pressure, resulting in persistent ischemia, hypoxia, malnutrition of the tissue, and ulceration and necrosis of the tissue. With the increasing degree of aging of the population, various chronic diseases are gradually developed with the aging, and the incidence rate is continuously rising. Prevention of chronic diseases is critical in enabling long-term monitoring, but large-scale equipment in hospitals is not suitable for long-term monitoring. Particularly in the prevention of pressure sores/pressure injuries in paralyzed or elderly persons, pressure is the most immediate cause of pressure sores, where the temperature and humidity of the pressure site can accelerate the occurrence of pressure sores/pressure injuries in the tissue. The chronic refractory wound surface is produced, and the recovery of later-period patients and the living quality of the old are greatly influenced. The causative factors of stress injury are numerous and the result of many complex factors, and can be generally classified into endogenous factors and exogenous factors. Exogenous factors include local pressure, friction, skin microenvironment including local temperature and local humidity, and the like. Endogenous factors include nutrition, vascular parameters (arterial pressure, blood glucose, etc.), voluntary activities, age and sex, etc. To address future aging of the population, to avoid pressure sores/stress injuries during patient recovery and to reduce the workload of nurses accordingly. It is necessary to monitor the pressure, temperature and humidity of the affected and aged people. The flexible wearable electronic equipment is very suitable for monitoring and preventing the chronic diseases due to the advantages of small size, flexibility and skin compliance and capability of monitoring in real time. Therefore, the preparation and development of the flexible self-powered wearable sensor have important significance.
At present, the sensor manufactured by utilizing the piezoelectric effect has the advantages of simple manufacturing method and high sensitivity, and many scientific researchers are researching the sensor. Among various piezoelectric materials, barium titanate has a relatively high dielectric constant and piezoelectric coefficient (d 33 >200 pC/N) is widely used, but barium titanate piezoelectric ceramics have mechanical brittleness and are not suitable for flexible sensors. There are studies showing that pressure sensor is fabricated using ferroelectric piezoelectric material barium titanate nanoparticles as dielectric (Novel Piezoelectric Paper-Based Flexible Nanogenerators Composed of BaTiO 3 Nanoparticles and Bacterial Cellulose). But how to obtain a flexible piezoelectric sensor with higher piezoelectricity based on barium titanate is important. And combining temperature and humidity sensing, the requirement of manufacturing the pressure sore monitoring sensing unit is urgent.
Disclosure of Invention
Aiming at the defects of the prior art, the primary purpose of the invention is to provide a flexible self-powered pressure sensor and a preparation method thereof.
Another object of the present invention is to provide the use of the flexible self-powered sensor described above in medical health monitoring and pressure sore prevention
The above object of the present invention is achieved by the following technical scheme:
a preparation method of a flexible self-powered pressure sensor comprises the following steps:
sequentially dissolving p-styrene sulfonate, acrylonitrile, a cross-linking agent, an initiator and modified barium titanate in an organic solvent, carrying out heat preservation reaction under an inert atmosphere to obtain a prepolymer, then carrying out freeze drying treatment on the prepolymer, and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor.
Preferably, the barium titanate of the modified barium titanate is barium titanate with piezoelectric tetragonal phase, and the modifier is a silane coupling agent;
further preferably, the modifier is propyl 3- (trimethoxysilyl) methacrylate (TMSPM).
Preferably, the dosage of the modified barium titanate is 3% of the total mass of sodium styrene sulfonate and acrylonitrile.
Preferably, the barium titanate nanoparticles are prepared by hydrothermal reaction.
Preferably, the preparation method of the modified barium titanate comprises the following steps: dissolving acetic acid in deionized water to obtain solution A; dissolving 3- (trimethoxysilyl) propyl methacrylate in ethanol to obtain solution B; and adding the solution A into the solution B, adding barium titanate, performing ultrasonic treatment, and cleaning to obtain the modified barium titanate.
Further preferably, the volume fraction of acetic acid in the solution A is 5-30%, and the volume fraction of 3- (trimethoxysilyl) propyl methacrylate in the solution B is 5-30%; the volume ratio of the liquid A to the liquid B is 1:3-8; more preferably, the volume fraction of acetic acid in the solution a is 10%, and the volume fraction of 3- (trimethoxysilyl) propyl methacrylate in the solution B is 10%; the volume ratio of the liquid A to the liquid B is 1:5.
Preferably, the organic solvent is at least one selected from dimethyl sulfoxide (DMSO), N-Dimethylformamide (DMF), tetrahydrofuran (THF), and ethylene glycol dimethyl ether.
Preferably, the p-styrenesulfonate is sodium p-styrenesulfonate.
Preferably, the cross-linking agent is N, N' -methylenebisacrylamide;
preferably, the initiator is a thermal initiator or a photoinitiator.
Further preferably, the initiator is Ammonium Persulfate (APS).
Preferably, the mass ratio of the components is (10-20): 60-80): 4-6, and the solid content dissolved in the organic solvent is 12-15 w/v%.
Further preferably, the mass ratio of the components is 20:80:6:5 for styrene sulfonate, acrylonitrile and cross-linking agent and initiator. The solid content dissolved in the organic solvent was 15w/v%.
Preferably, the temperature of the heat preservation reaction is 40-60 ℃, and the time of the heat preservation reaction is 10-40 min;
further preferably, the temperature of the incubation reaction is 60 ℃, and the time of the incubation reaction is 20min.
Preferably, the freeze drying temperature is-80 to-20 ℃ and the time is 24 to 48 hours.
Further preferably, the freeze-drying temperature is-60 ℃ and the time is 36 hours.
Preferably, the inert atmosphere refers to a nitrogen atmosphere.
The flexible self-powered pressure sensor is prepared by the preparation method.
The application of the flexible self-powered pressure sensor in preparing a pressure sore monitoring sensor comprises the following steps: and installing a temperature and humidity sensor on the flexible self-powered pressure sensor to obtain the pressure sore monitoring sensor unit. The pressure sore monitoring sensor unit is further assembled into a pressure sore monitoring sensor array.
The prepared pressure sore monitoring sensor is applied to pressure sore monitoring in real time.
Compared with the prior art, the invention has the following advantages and effects:
(1) The preparation method disclosed by the invention is simple in process, and the prepared flexible self-powered pressure sensor is good in electromechanical response and stable in mechanical property;
(2) The pressure sore monitoring sensor prepared by the invention can well monitor pressure sores.
Drawings
Fig. 1 is a cyclic compressive stress-strain diagram of a flexible self-powered sensor fabricated in example 4;
fig. 2 is a derived voltage plot of the flexible self-powered sensor fabricated in example 4;
FIG. 3 is a graph of the self-powered sensor voltage output made in example 4 and comparative example 1;
fig. 4 is a schematic diagram of the pressure sore application of the pressure sore monitoring sensor made in example 7.
Detailed Description
Specific implementations of the invention are further described below with reference to the drawings and examples, but the implementation and protection of the invention are not limited thereto. It should be noted that the following processes, if not specifically described in detail, can be realized or understood by those skilled in the art with reference to the prior art. The reagents or apparatus used were not manufacturer-specific and were considered conventional products commercially available.
Example 1
Preparation of a flexible self-powered pressure sensor:
sodium p-styrenesulfonate, acrylonitrile, a cross-linking agent N, N' -methylene bisacrylamide and an initiator Ammonium Persulfate (APS) are sequentially dissolved in DMSO according to the mass ratio of 20:80:6:5, wherein the mass ratio of modified barium titanate nano particles is 0% of the sum of the acrylonitrile and the sodium p-styrenesulfonate, the solid content is 15w/v%, and the slurry is poured into a manufactured mold, and N is the same as the total weight of the sodium p-styrenesulfonate 2 And (3) carrying out heat preservation reaction for 20min at 60 ℃ under the atmosphere, then carrying out freeze drying at the temperature of-60 ℃ for 36h, and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor. The preparation method of the modified barium titanate comprises the following steps: 1ml of acetic acid was dissolved in 10ml of deionized water to obtain solution A, and 5ml of TMSPM modifier was dissolved in 50ml of ethanol to obtain solution B. Adding the liquid A into the liquid B to obtain a mixed solution, adding barium titanate into the mixed solution, performing ultrasonic treatment for 24 hours, and cleaning to obtain the barium titanate.
The amplitude of the electrical signal of the flexible self-powered force sensor obtained by the embodiment is about 10 mV.
Example 2
Preparation of a flexible self-powered pressure sensor:
sodium p-styrenesulfonate, acrylonitrile, a cross-linking agent N, N' -methylene bisacrylamide and an initiator Ammonium Persulfate (APS) are sequentially dissolved in DMSO according to the mass ratio of 20:80:6:5, wherein the mass ratio of modified barium titanate nano particles is 1 percent of the sum of the acrylonitrile and the sodium p-styrenesulfonate, the solid content is 15w/v percent, the slurry is poured into a manufactured mold, and the N is the same as the total mass ratio of the acrylonitrile and the sodium p-styrenesulfonate 2 And (3) carrying out heat preservation reaction for 20min at 60 ℃ under the atmosphere, then carrying out freeze drying at the temperature of-60 ℃ for 36h, and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor. The preparation method of the modified barium titanate comprises the following steps: 1ml of acetic acid was dissolved in 10ml of deionized water to obtain solution A, and 5ml of TMSPM modifier was dissolved in 50ml of ethanol to obtain solution B. Adding the liquid A into the liquid B to obtain a mixed solution, adding barium titanate into the mixed solution, performing ultrasonic treatment for 24 hours, and cleaning to obtain the barium titanate.
The amplitude of the electrical signal of the flexible self-powered force sensor obtained by the embodiment is about 15 mV.
Example 3
Preparation of a flexible self-powered pressure sensor:
sodium p-styrenesulfonate, acrylonitrile, a cross-linking agent N, N' -methylene bisacrylamide and an initiator ammonium persulfate are sequentially dissolved in DMSO according to the mass ratio of 20:80:6:5, wherein the mass ratio of modified barium titanate nano particles is 2% of the sum of the acrylonitrile and the sodium p-styrenesulfonate, the solid content is 15w/v%, the slurry is poured into a manufactured mold, and the N is added into the mold 2 And (3) carrying out heat preservation reaction for 20min at 60 ℃ under the atmosphere, then carrying out freeze drying at the temperature of-60 ℃ for 36h, and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor. Wherein, the method for modifying barium titanate uses 1ml of acetic acid to be dissolved in 10ml of deionized water to obtain solution A, and 5ml of TMSPM modifier to be dissolved in 50ml of ethanol to obtain solution B. Adding the liquid A into the liquid B to obtain a mixed solution, adding barium titanate into the mixed solution, performing ultrasonic treatment for 24 hours, and cleaning to obtain the barium titanate.
The amplitude of the electrical signal of the flexible self-powered force sensor obtained by the embodiment is about 22 mv.
Example 4
Preparation of a flexible self-powered pressure sensor:
sodium p-styrenesulfonate, acrylonitrile, a cross-linking agent N, N' -methylene bisacrylamide and an initiator ammonium persulfate are sequentially dissolved in DMSO according to the mass ratio of 20:80:6:5, wherein the mass ratio of modified barium titanate nano particles is 3 percent of the sum of the acrylonitrile and the sodium p-styrenesulfonate, the solid content is 15w/v percent, the slurry is poured into a manufactured mold, and the N is added into the mold 2 The reaction is carried out for 20min at 60 ℃ under the atmosphere, and then freeze drying is carried out for 36h at the temperature of minus 60 ℃; and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor. Wherein, the method for modifying barium titanate uses 1ml of acetic acid to be dissolved in 10ml of deionized water to obtain solution A, and 5ml of TMSPM modifier to be dissolved in 50ml of ethanol to obtain solution B. Adding the liquid A into the liquid B to obtain a mixed solution, adding barium titanate into the mixed solution, performing ultrasonic treatment for 24 hours, and cleaning to obtain the barium titanate.
The amplitude of the electrical signal of the flexible self-powered force sensor obtained by the embodiment is about 60 mv.
Comparative example 1
Preparation of a flexible self-powered pressure sensor:
sodium p-styrenesulfonate, acrylonitrile, a cross-linking agent N, N' -methylene bisacrylamide and an initiator ammonium persulfate are sequentially dissolved in DMSO according to the mass ratio of 20:80:6:5, wherein the mass ratio of unmodified barium titanate nano particles is 3% of the sum of the acrylonitrile and the sodium p-styrenesulfonate, the solid content is 15w/v%, and the slurry is poured into a manufactured mold, and N 2 And (3) carrying out heat preservation reaction for 20min at 60 ℃ under the atmosphere, then carrying out freeze drying at the temperature of-60 ℃ for 36h, and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor.
The cyclic compressive stress-strain diagram with flexible piezoelectric pressure sensor obtained in example 4 is shown in fig. 1. The resulting derived voltage plot for the flexible piezoelectric sensor (elastomer with mechatronic response) obtained in example 4 is shown in fig. 2 (the test conditions of fig. 2 were obtained under a test of 12.5N force). The self-powered sensor voltage output graph made in example 4 and comparative example 1 is shown in fig. 3.
From the results of fig. 1, it can be seen that the resiliency of the sensor with electromechanical response is very excellent, the hysteresis curves are substantially coincident and the hysteresis is very small for each stress-strain; fig. 2 shows that the electrical signal amplitude of the flexible self-powered sensor is around 60 mv. Fig. 3 shows that the piezoelectric properties of the modified piezoelectric elastomer are significantly improved relative to the unmodified piezoelectric elastomer of comparative example 1. The reason is that the modified barium titanate is not simply blended with the polymer, but the modified barium titanate may participate in the polymerization as a crosslinking agent.
Example 5
Preparation of a flexible self-powered pressure sensor:
sodium p-styrenesulfonate, acrylonitrile, a cross-linking agent N, N' -methylene bisacrylamide and an initiator ammonium persulfate are sequentially dissolved in DMSO according to the mass ratio of 20:80:6:5, wherein the mass ratio of modified barium titanate nano particles is 4% of the sum of the acrylonitrile and the sodium p-styrenesulfonate, the solid content is 15w/v%, the slurry is poured into a manufactured mold, and the N is added into the mold 2 The reaction is carried out for 20min at 60 ℃ under the atmosphere, and then freeze drying is carried out for 36h at the temperature of minus 60 ℃; and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor. Wherein, the method for modifying barium titanate uses 1ml of acetic acid to be dissolved in 10ml of deionized water to obtain solution A, and 5ml of TMSPM modifier to be dissolved in 50ml of ethanol to obtain solution B. Adding the liquid A into the liquid B to obtain a mixed solution, adding barium titanate into the mixed solution, performing ultrasonic treatment for 24 hours, and cleaning to obtain the barium titanate.
The amplitude of the electrical signal of the flexible self-powered force sensor obtained by the embodiment is about 30 mv.
Example 6
Preparation of a flexible self-powered pressure sensor:
sodium p-styrenesulfonate, acrylonitrile, a cross-linking agent N, N' -methylene bisacrylamide and an initiator ammonium persulfate are sequentially dissolved in DMSO according to the mass ratio of 20:80:6:5, the mass ratio of modified barium titanate nano particles is 5 percent of the sum of the acrylonitrile and the sodium p-styrenesulfonate, the solid content is 15w/v percent, the slurry is poured into a manufactured mold,N 2 the reaction is carried out for 20min at 60 ℃ under the atmosphere, and then freeze drying is carried out for 36h at the temperature of minus 60 ℃; and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor. Wherein, the method for modifying barium titanate uses 1ml of acetic acid to be dissolved in 10ml of deionized water to obtain solution A, and 5ml of TMSPM modifier to be dissolved in 50ml of ethanol to obtain solution B. Adding the liquid A into the liquid B to obtain a mixed solution, adding barium titanate into the mixed solution, performing ultrasonic treatment for 24 hours, and cleaning to obtain the barium titanate.
The amplitude of the electrical signal of the flexible self-powered force sensor obtained by the embodiment is about 30 mv.
Example 7
Preparation of a pressure sore monitoring sensor:
the flexible self-powered pressure sensor prepared in example 4 was mounted with a temperature and humidity sensor to obtain a pressure sore monitoring sensor unit. The pressure sore monitoring sensor unit is further assembled into a pressure sore monitoring sensor array.
The pressure sore monitoring sensor array prepared in this embodiment is shown in fig. 4, and includes: conductive silver paste lines, piezoelectric elastomers and temperature and humidity sensors.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the flexible self-powered pressure sensor is characterized by comprising the following steps of:
sequentially dissolving p-styrene sulfonate, acrylonitrile, a cross-linking agent, an initiator and modified barium titanate in an organic solvent, carrying out heat preservation reaction under an inert atmosphere to obtain a prepolymer, then carrying out freeze drying treatment on the prepolymer, and coating silver paste and copper foil to obtain the flexible self-powered pressure sensor; the modifier of the modified barium titanate is 3- (trimethoxysilyl) propyl methacrylate, and the dosage of the modified barium titanate is 3% of the total mass of sodium p-styrenesulfonate and acrylonitrile.
2. The method of claim 1, wherein the barium titanate of the modified barium titanate is barium titanate having a piezoelectric tetragonal phase.
3. The method for preparing a flexible self-powered pressure sensor as claimed in claim 1, wherein the method for preparing the modified barium titanate is as follows: dissolving acetic acid in deionized water to obtain solution A; dissolving 3- (trimethoxysilyl) propyl methacrylate in ethanol to obtain solution B; and adding the solution A into the solution B, adding barium titanate, performing ultrasonic treatment, and cleaning to obtain the modified barium titanate.
4. The method for manufacturing a flexible self-powered pressure sensor as claimed in claim 1, wherein said organic solvent is at least one selected from the group consisting of dimethyl sulfoxide, N-dimethylformamide, tetrahydrofuran, and ethylene glycol dimethyl ether; the p-styrenesulfonate is sodium p-styrenesulfonate.
5. The method of claim 1, wherein the cross-linking agent is N, N' -methylenebisacrylamide; the initiator is a thermal initiator or a photoinitiator.
6. The method of claim 5, wherein the initiator is ammonium persulfate.
7. The preparation method of the flexible self-powered pressure sensor according to claim 1, wherein the mass ratio of the components is (10-20) of styrene sulfonate, (60-80) of an initiator, (4-6) of an initiator and the solid content dissolved in an organic solvent is 12-15 w/v%.
8. The method for manufacturing a flexible self-powered pressure sensor as claimed in claim 1, wherein the temperature of the incubation reaction is 40-60 ℃ and the time of the incubation reaction is 10-40 min; the freeze drying temperature is-80 to-20 ℃ and the time is 24 to 48 hours.
9. A flexible self-powered pressure sensor prepared by the method of any one of claims 1 to 8.
10. Use of a flexible self-powered pressure sensor as claimed in claim 9 for the preparation of a pressure wound monitoring sensor, comprising the steps of: and installing a temperature and humidity sensor on the flexible self-powered pressure sensor to obtain the pressure sore monitoring and sensing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210344248.4A CN114878032B (en) | 2022-04-02 | 2022-04-02 | Flexible self-powered pressure sensor and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210344248.4A CN114878032B (en) | 2022-04-02 | 2022-04-02 | Flexible self-powered pressure sensor and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114878032A CN114878032A (en) | 2022-08-09 |
| CN114878032B true CN114878032B (en) | 2023-06-20 |
Family
ID=82668902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210344248.4A Active CN114878032B (en) | 2022-04-02 | 2022-04-02 | Flexible self-powered pressure sensor and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114878032B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106366574B (en) * | 2016-10-07 | 2018-11-06 | 嘉兴尚云自动化设备有限公司 | A kind of preparation method of piezoelectric material |
| CN109106980B (en) * | 2018-07-24 | 2021-07-20 | 华南理工大学 | High-strength hydrogel with electric activity and preparation method and application thereof |
| CN109160972B (en) * | 2018-08-03 | 2020-12-22 | 华南理工大学 | Elastomer with electromechanical response and preparation method and application thereof |
| WO2020110183A1 (en) * | 2018-11-27 | 2020-06-04 | 株式会社アドマテックス | Surface-modified barium titanate particle material, barium titanate-containing resin composition, and barium titanate dispersion |
| CN110437381A (en) * | 2019-08-20 | 2019-11-12 | 广东工业大学 | A kind of elastic material and the preparation method and application thereof |
| CN110690342B (en) * | 2019-10-13 | 2021-05-14 | 浙江大学 | Flexible piezoelectric energy conversion device based on carbon-coated barium titanate/PVDF |
| CN111664970B (en) * | 2020-05-28 | 2021-06-11 | 浙江大学 | Self-powered flexible pressure sensing device and preparation method thereof |
| CN113218543B (en) * | 2021-05-07 | 2023-04-28 | 中国科学院苏州纳米技术与纳米仿生研究所 | Flexible pressure sensor, dielectric layer thereof and preparation method of dielectric layer |
-
2022
- 2022-04-02 CN CN202210344248.4A patent/CN114878032B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114878032A (en) | 2022-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kumar | Flexible and wearable capacitive pressure sensor for blood pressure monitoring | |
| Seo et al. | Calcium‐modified silk as a biocompatible and strong adhesive for epidermal electronics | |
| Zhang et al. | Mussel-inspired adhesive and conductive hydrogel with tunable mechanical properties for wearable strain sensors | |
| Wang et al. | Adhesive and tough hydrogels promoted by quaternary chitosan for strain sensor | |
| Tang et al. | Autonomous self-healing, self-adhesive, highly conductive composites based on a silver-filled polyborosiloxane/polydimethylsiloxane double-network elastomer | |
| CN109099832B (en) | Strain sensor and method for manufacturing the same | |
| Wu et al. | An implantable and versatile piezoresistive sensor for the monitoring of human–machine interface interactions and the dynamical process of nerve repair | |
| CN111118889B (en) | Multifunctional flexible sensing fiber membrane and preparation method and application thereof | |
| Wang et al. | A cyclic freezing-thawing approach to layered Janus hydrogel tapes with single-sided adhesiveness for wearable strain sensors | |
| CN110491989A (en) | A kind of high sensitivity flexible electronic skin and preparation method thereof | |
| CN106880355B (en) | Flexible bioelectrode array based on capacitive coupling and preparation method thereof | |
| CN112225942A (en) | Preparation method of strain-temperature dual-response flexible electronic sensor composite material, electronic sensor obtained by preparation method and composite material | |
| Hu et al. | Enhancing strain-sensing properties of the conductive hydrogel by introducing PVDF-TrFE | |
| CN113218296B (en) | Elastic strain sensor and preparation method thereof | |
| Sun et al. | Hydrogel-integrated multimodal response as a wearable and implantable bidirectional interface for biosensor and therapeutic electrostimulation | |
| CN114878032B (en) | Flexible self-powered pressure sensor and preparation method and application thereof | |
| Guan et al. | A plantar wearable pressure sensor based on hybrid lead zirconate-titanate/microfibrillated cellulose piezoelectric composite films for human health monitoring | |
| Kim et al. | Biocompatible composite thin-film wearable piezoelectric pressure sensor for monitoring of physiological and muscle motions | |
| Zhang et al. | Multifunctional hybrid hydrogel with transparency, conductivity, and self-adhesion for soft sensors using hemicellulose-decorated polypyrrole as a conductive matrix | |
| CN111110222A (en) | Biological protein flexible skin patch type electrode and preparation method thereof | |
| Yu et al. | Wearable and flexible hydrogels for strain sensing and wound electrical stimulation | |
| CN116222842A (en) | Flexible strain sensor and preparation method and application thereof | |
| CN112745559B (en) | Polymer dielectric elastomer and preparation method and application thereof | |
| CN113587803A (en) | Capacitive polymer strain sensor, preparation method and application | |
| Sha et al. | Wearable, antibacterial, and self-healable modular sensors for monitoring joints movement ultra-sensitively |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |