CN113832553A - Preparation method of temperature-strain dual-function sensing integrated breathable film - Google Patents
Preparation method of temperature-strain dual-function sensing integrated breathable film Download PDFInfo
- Publication number
- CN113832553A CN113832553A CN202111070354.XA CN202111070354A CN113832553A CN 113832553 A CN113832553 A CN 113832553A CN 202111070354 A CN202111070354 A CN 202111070354A CN 113832553 A CN113832553 A CN 113832553A
- Authority
- CN
- China
- Prior art keywords
- temperature
- strain
- film
- tpu
- sensing integrated
- 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.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
- A61B5/02055—Simultaneously evaluating both cardiovascular condition and temperature
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
- D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/38—Polyurethanes
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Veterinary Medicine (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Physics & Mathematics (AREA)
- Public Health (AREA)
- Physiology (AREA)
- Cardiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Pulmonology (AREA)
- Dispersion Chemistry (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention provides a preparation method of a temperature-strain dual-function sensing integrated breathable film, which specifically comprises the following steps: (a) dissolving TPU particles in a DMF/THF blending solvent to form a uniformly mixed solution; sucking the mixed solution by using an electrostatic spinning device, covering an aluminum film on the surface of a collecting device of the electrostatic spinning device to be used as a deposition substrate, and collecting TPU fibers on the surface of the aluminum film substrate to form a two-dimensional meshed fabric type TPU film; (b) treating the TPU film prepared in the step (a) by a plasma cleaning machine, and soaking the treated TPU film in a PSSH solution; (c) soaking the TPU film in the carbon nano material-carbon particle dispersion liquid; (d) and soaking the TPU film in the conductive polymer solution added with the dimethyl sulfoxide. The film material prepared by the invention can realize the simultaneous sensing of temperature and strain functions and can meet the use under the condition of large strain.
Description
Technical Field
The invention relates to the technical field of material preparation, in particular to a preparation method of a temperature-strain dual-function sensing integrated breathable film.
Background
In the field of wearable electronic devices for human health monitoring and artificial intelligent electronic skins, it is very important to develop sensing materials capable of monitoring temperature and strain simultaneously. On one hand, the material capable of realizing the temperature and strain dual-function sensing can be used for monitoring daily activities (such as movement, walking and the like) and body states (such as body temperature, blood pressure, pulse and the like) of a human body. On the other hand, the flexible film type sensor with multiple sensing functions can simulate the human skin function and can be applied to multiple fields of artificial skin transplantation, prosthesis manufacturing, robot electronic skin and the like.
At present, the development of sensing technology aiming at strain or temperature single function is mature, but the flexible film material capable of simultaneously realizing temperature and strain dual-function sensing is still relatively limited. Two temperature-strain sensing measurement systems are disclosed in patents CN211291327U and CN110836691A, but both of them are designed as split structures in which two independent functional sensing devices, namely a temperature sensing unit and a strain sensing unit, are connected through a circuit. In contrast, an integrated structure design capable of simultaneously implementing two signal sensing functions of temperature and strain based on the same homogeneous material is still lacking at present. How to realize the decoupling and the independent output of two detection signals of temperature and strain in the temperature and strain dual-function integrated sensing material is also a key problem for preparing the multifunctional sensor. In consideration of the application to the large strain motion conditions of knee joints, elbow joints and the like of human bodies, the dual-function sensing element used is required to have large-range stretching recovery performance and ensure that the signal detection accuracy is maintained under large stretching strain. Based on the problems, the preparation of the integrated breathable film capable of realizing temperature and strain dual-function sensing has important value for scientific research and practical application.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a preparation method of a temperature-strain dual-function sensing integrated breathable film. The invention takes a Thermoplastic Polyurethane (TPU) elastomer film prepared by an electrostatic spinning technology as a carrier, and simultaneously carries a carbon nano material and poly (3, 4-ethylenedioxythiophene) with thermoelectric effect in a three-dimensional porous structure: the prepared film material can realize the simultaneous sensing of temperature and strain, can meet the use of large strain condition (greater than 100% strain), and provides an effective scheme for solving the related problems of temperature and strain double-function sensing in the fields of wearable electronic devices, electronic skins and the like.
The technical means adopted by the invention are as follows:
a preparation method of a temperature-strain bifunctional sensing integrated breathable film specifically comprises the following steps:
(a) dissolving TPU particles in a DMF/THF blending solvent to form a uniformly mixed solution; sucking the mixed solution by using an electrostatic spinning device, covering an aluminum film on the surface of a collecting device of the electrostatic spinning device to be used as a deposition substrate, and collecting TPU fibers on the surface of the aluminum film substrate to form a two-dimensional meshed fabric type TPU film; the prepared TPU film can be peeled off from the surface of the aluminum substrate to form a self-supporting film structure;
(b) treating the TPU film prepared in the step (a) by a plasma cleaning machine, soaking the treated TPU film in a PSSH solution, taking out and drying the treated TPU film in the air at room temperature;
(c) preparing a carbon nano material and carbon particle water system dispersion liquid, soaking the TPU film treated in the step (b) in the carbon nano material-carbon particle dispersion liquid, and then taking out and drying;
(d) adding 1-10% volume fraction dimethyl sulfoxide into the conductive polymer solution in advance; and (c) soaking the TPU film taken out in the step (c) in a conductive polymer solution added with dimethyl sulfoxide, and then taking out and drying the film.
Further, the mass fraction of TPU in the DMF/THF blend solvent is in the range of 5% to 50%, and the volume fraction of DMF in the DMF/THF blend solvent is in the range of 0% to 100%.
Further, the type of plasma in the plasma cleaner may be air plasma, oxygen plasma, or argon plasma.
Further, the concentration of the PSSH solution is 1% -20%.
Further, the carbon nano material loaded on the TPU film comprises one or a combination of several of carbon particles, carbon nanotubes, graphene, fullerene and carbon nanocoils.
Further, the conductive polymer is PEDOT PSS or other conductive polymers soluble in water or organic solvents.
Further, the thickness of the prepared two-dimensional netted fabric type TPU film is 0.1 mu m-1 mm.
Furthermore, the temperature detection range of the TPU film is 0-200 ℃, and the detection precision is 0.01-2K.
Furthermore, the strain detection range of the TPU film is 1-120%, and the strain detection sensitivity factor is 5-50.
Furthermore, when the temperature and the strain excitation are simultaneously applied to the thin film material, the temperature is detected through the thermal voltage, the strain is detected through the resistance change, and the dual-function detection of the temperature and the strain and the signal decoupling are realized.
Compared with the prior art, the invention has the following advantages:
1. because the TPU film has strong self-stretchability, good recovery and stable mechanical property, the integrated breathable film which can realize temperature and strain dual-function sensing and is prepared by the method provided by the invention has the maximum stretching amount of 100 percent.
2. The invention provides a preparation method of a temperature-strain dual-function sensing integrated breathable film, which utilizes the thermoelectric effect of PEDOT: PSS, the prepared film material generates a voltage signal (delta V is S delta T, S is the Seebeck coefficient of the film material) under the condition that the temperature difference exists between two ends of the material (the temperature at the two ends is respectively T1 and T2), the temperature difference value (delta T is T2-T1) can be obtained by detecting the voltage signal, when the temperature excitation is applied to one end of the film, and the other end is in a normal temperature state (for example, T1 is 298K), the temperature signal at the detection end can be calculated by the temperature difference signal, so that the temperature detection (T2 is delta T +298K) can be realized.
3. According to the preparation method of the temperature-strain dual-function sensing integrated breathable film, the TPU film prepared by the electrostatic spinning technology is not conductive, and after the TPU film is used as a carrier to carry carbon nano materials, the carbon nano materials are physically contacted to enhance the conductivity of the film; after the film is subjected to strain stimulation, the contact between carbon nano materials in the film is changed due to the stretching effect, the conductive path is changed, and the resistance value of the film is changed, so that the strain detection is realized.
4. According to the preparation method of the temperature-strain dual-function sensing integrated breathable film, the sensing of temperature is based on the thermal voltage signal, and the sensing of strain is based on the resistance change, so that the temperature stimulation and the strain stimulation of a film material can be determined by respectively detecting the thermal voltage signal and the resistance signal; the thin film material prepared by the invention can realize high decoupling on sensing signals with two functions of temperature and strain.
Based on the reasons, the invention can be widely popularized in the fields of material preparation and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a scanning electron microscope image of a temperature and strain dual function sensing integrated breathable film made by the method of the present invention.
FIG. 2 shows the temperature response of the temperature and strain dual-function sensing integrated breathable film prepared by the method of the invention under the conditions of no strain and 5K, 10K and 14K temperature difference.
FIG. 3 is a graph showing the resistance response of the dual-function temperature and strain sensing integrated breathable film prepared by the method of the invention under the conditions of no temperature difference and 50%, 80% and 100% strain.
FIG. 4 shows the response of the temperature and strain dual-function sensing integrated breathable film prepared by the method of the invention to temperature and resistance under the condition of no tensile strain with the temperature difference of 8K.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The technical scheme adopted by the invention is that firstly, an electrostatic spinning technology is adopted to prepare a TPU elastomer film, then the TPU film is sequentially immersed into a carbon particle-carbon nano material dispersion liquid and a PEDOT (Poly ethylene glycol Ether-Co-Polymer) PSS dispersion liquid, and an integrated breathable film capable of realizing temperature and strain dual-function sensing is obtained after drying, and the method specifically comprises the following steps:
(a) dissolving TPU particles in a DMF/THF blending solvent to form a uniform mixed solution, preferably dissolving the TPU particles in the DMF/THF blending solvent with the volume ratio of 1:3 by mass fraction of 20% to form the uniform mixed solution; absorbing the solution by using an electrostatic spinning device, covering an aluminum film on the surface of a collecting device of the electrostatic spinning device to be used as a deposition substrate, and collecting TPU fibers on the surface of the aluminum film substrate to form a two-dimensional meshed fabric type TPU film based on the electrostatic spinning principle; the electrostatic spinning parameters were set as follows: the positive pressure is 7V, the negative pressure is-1V, the ambient temperature is 24 ℃, the humidity is 15%, the diameter of the needle is 20G, the flow rate of the liquid sprayed by the injector is 1mL/h, the distance between the TPU film collector and the needle is 15cm, the rotating speed of the collector is 200r/min, and the collecting time is 9 hours; the prepared film can be peeled off from the surface of the aluminum substrate to form a self-supporting film structure.
(b) Treating the TPU film prepared in the step (a) in a plasma cleaning machine for 3 minutes, soaking the treated TPU film in a PSSH solution with the mass fraction of 1-20% for 2 hours, taking out and drying the treated TPU film in the air at room temperature; preferably, the concentration of the PSSH solution is 18%;
(c) preparing a carbon nano material and carbon particles with a mass ratio of 1: 20 in an aqueous dispersion; soaking the TPU film treated in the step (b) in the carbon nano material-carbon particle dispersion liquid for 5 minutes, and then taking out and drying in an oven at the temperature of 60 ℃;
(d) adding 1-10% volume fraction dimethyl sulfoxide into the conductive polymer solution in advance; preferably 5% by volume of dimethyl sulfoxide; adding the TPU film taken out in the step (c) and soaking in a conductive polymer solution containing 5 wt.% of dimethyl sulfoxide, taking out the TPU film after 3 hours, and drying in an oven at the temperature of 60 ℃.
Further, the mass fraction of TPU in the DMF/THF blend solvent is in the range of 5% to 50%, and the volume fraction of DMF in the DMF/THF blend solvent is in the range of 0% to 100%.
Further, the type of plasma in the plasma cleaner may be air plasma, oxygen plasma, or argon plasma.
Further, the carbon nano material loaded on the TPU film comprises one or a combination of several of carbon particles, carbon nanotubes, graphene, fullerene and carbon nanocoils.
Further, the conductive polymer is PEDOT PSS, or other conductive polymers soluble in water or organic solvents, such as polyaniline, which is a conductive polymer soluble in N-methylpyrrolidone.
Further, the thickness of the prepared two-dimensional netted fabric type TPU film is 0.1 mu m-1 mm.
Furthermore, the temperature detection range of the TPU film is 0-200 ℃, and the detection precision is 0.01-2K.
Furthermore, the strain detection range of the TPU film is 1-120%, and the strain detection sensitivity factor is 5-50.
Furthermore, when the temperature and the strain excitation are simultaneously applied to the thin film material, the temperature is detected through the thermal voltage, the strain is detected through the resistance change, and the dual-function detection of the temperature and the strain and the signal decoupling are realized.
Further, since the TPU film is made of TPU fibers, gas molecules such as water vapor can easily permeate therethrough, and the film has good air permeability.
The TPU film prepared by the method can be peeled off from the substrate and is of a self-supporting structure. FIG. 1 is a scanning electron microscope image of a dual function temperature and strain sensing integral breathable film.
In practical application, the two ends of the TPU film are bonded with the copper tapes to be used as electrodes, so that the TPU film can be used for sensing performance test and application:
temperature detection: and (d) testing by using a film thermoelectric parameter testing system, wherein the Seebeck coefficient of the PEDOT/WPU composite fiber porous reticular film prepared in the step (d) is 14.7 +/-0.8 muV/K, and a voltage signal of 14.8 muV is generated at two ends of the film material under the condition of temperature difference of every 1K.
Strain detection: and (d) placing the film prepared in the step (d) in a clamp clamped in a tensile machine, and carrying out strain test under the conditions that the initial length between two electrodes is 7mm and the strain loading rate is 1 mm/min.
The temperature response of the temperature and strain dual-function sensing integrated breathable film under the conditions of no strain and the existence of 5K, 10K and 14K temperature difference is shown in figure 2.
A temperature stimulus (T) is applied to one end of the film and the other end is maintained at ambient temperature (T0), creating a temperature differential across the film. Based on the thermoelectric effect of PEDOT: PSS, a thermoelectric voltage signal is generated corresponding to the temperature difference. Therefore, the temperature difference between the two ends of the film can be calculated by testing the voltage (namely, the thermal voltage) value of the two ends of the film by using a passive multimeter. Because the temperature of one end of the film is in a normal temperature state, the applied temperature stimulation value can be further calculated according to the temperature difference value. At a temperature difference of 5K, the thermal voltage value is 73.5 μ V. At a temperature difference of 10K, the thermal voltage value is 140 μ V. At a temperature difference of 14K, the thermal voltage value is 205 μ V.
The dual function sensing integrated breathable film for temperature and strain has no temperature difference and the resistance response under the conditions of 50%, 80% and 100% strain is shown in figure 3.
The tensile strain applied by external stretching is directly reflected as the relative change of the resistance value of the film, and the tensile strain applied on the film is obtained according to the change of the resistance values at two ends of the film. As can be seen from fig. 3, the resistance of the film increases by different factors under different applied tensile strains, confirming the sensing ability of the film against tensile strain. The 50% tensile strain corresponds to a film resistance of 1.5 times the initial resistance. The tensile strain amount of 80% corresponds to the resistance of the film being 1.75 times the initial resistance value. The amount of tensile strain at 100% corresponds to a film resistance of 1.95 times the initial resistance value.
Under the condition of no tensile strain at 8K, the response of the temperature and strain dual-function sensing integrated breathable film to the temperature and the resistance is shown in figure 4.
The thermal voltage across the film was 118 μ V and remained constant while maintaining an 8K temperature differential across the film material. Under the condition, the film is applied with tensile strain from 0-100%, the thermal voltage value is still stable, the thermal voltage is only related to the temperature difference between two ends of the film (namely the temperature of a detection end), and is not influenced by the applied strain, and the film has the sensing accuracy and signal decoupling performance for the two functions of temperature and strain.
The above examples demonstrate that: the temperature-strain dual-function sensing integrated breathable film prepared by the technical scheme provided by the invention can realize effective sensing on two energy supplies of temperature and strain, and the material has strong breathability, so that the temperature-strain dual-function sensing integrated breathable film is very suitable for the fields of wearable electronic devices and electronic skins.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A preparation method of a temperature-strain bifunctional sensing integrated breathable film is characterized by comprising the following steps:
(a) dissolving TPU particles in a DMF/THF blending solvent to form a uniformly mixed solution; sucking the mixed solution by using an electrostatic spinning device, covering an aluminum film on the surface of a collecting device of the electrostatic spinning device to be used as a deposition substrate, and collecting TPU fibers on the surface of the aluminum film substrate to form a two-dimensional meshed fabric type TPU film; the prepared TPU film can be peeled off from the surface of the aluminum substrate to form a self-supporting film structure;
(b) treating the TPU film prepared in the step (a) by a plasma cleaning machine, soaking the treated TPU film in a PSSH solution, taking out and drying the treated TPU film in the air at room temperature;
(c) preparing a carbon nano material and carbon particle water system dispersion liquid, soaking the TPU film treated in the step (b) in the carbon nano material-carbon particle dispersion liquid, and then taking out and drying;
(d) adding 1-10% volume fraction dimethyl sulfoxide into the conductive polymer solution in advance; and (c) soaking the TPU film taken out in the step (c) in a conductive polymer solution added with dimethyl sulfoxide, and then taking out and drying the film.
2. The preparation method of the temperature-strain bifunctional sensing integrated breathable film according to claim 1, wherein the mass fraction of the TPU in the DMF/THF blending solvent is 5% -50%, and the volume fraction of the DMF in the DMF/THF blending solvent is 0-100%.
3. The method for preparing the temperature-strain dual-function sensing integrated breathable film according to claim 1, wherein the type of plasma in the plasma cleaning machine can be air plasma, oxygen plasma or argon plasma.
4. The method for preparing the temperature-strain bifunctional sensing integrated breathable film according to claim 1, wherein the concentration of the PSSH solution is 1% -20%.
5. The method for preparing the temperature-strain bifunctional sensing integrated breathable film according to claim 1, wherein the carbon nanomaterial supported on the TPU film comprises one or a combination of carbon particles, carbon nanotubes, graphene, fullerene and carbon nanocoil.
6. The method for preparing the temperature-strain bifunctional sensing integrated breathable film according to claim 1, wherein the conductive polymer is PEDOT PSS or other conductive polymers soluble in water or organic solvents.
7. The preparation method of the temperature-strain bifunctional sensing integrated breathable film according to claim 1, wherein the thickness of the prepared two-dimensional mesh fabric type TPU film is 0.1 μm-1 mm.
8. The preparation method of the temperature-strain dual-function sensing integrated breathable film according to claim 1, wherein the TPU film is adopted for temperature detection, the temperature detection range is 0-200 ℃, and the detection precision is 0.01-2K.
9. The preparation method of the temperature-strain bifunctional sensing integrated breathable film according to claim 1, wherein the TPU film is adopted for strain detection with the range of 1% -120% and the strain detection sensitivity factor of 5-50.
10. The preparation method of the temperature-strain bifunctional sensing integrated breathable film according to claim 1, wherein when temperature and strain excitation is simultaneously applied to the film material, the temperature is detected through thermal voltage, and the strain is detected through resistance change, so that the dual-function detection of temperature and strain and signal decoupling are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111070354.XA CN113832553B (en) | 2021-09-13 | 2021-09-13 | Preparation method of temperature-strain dual-function sensing integrated breathable film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111070354.XA CN113832553B (en) | 2021-09-13 | 2021-09-13 | Preparation method of temperature-strain dual-function sensing integrated breathable film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113832553A true CN113832553A (en) | 2021-12-24 |
| CN113832553B CN113832553B (en) | 2022-12-02 |
Family
ID=78959087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111070354.XA Active CN113832553B (en) | 2021-09-13 | 2021-09-13 | Preparation method of temperature-strain dual-function sensing integrated breathable film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113832553B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110051775A1 (en) * | 2009-08-26 | 2011-03-03 | Ut-Battelle, Llc | Carbon nanotube temperature and pressure sensors |
| CA2832842A1 (en) * | 2013-11-07 | 2015-05-07 | Cleveland Medical Polymers, Inc. | Polymer nano-composites as dry sensor material for biosignal sensing |
| CN105547138A (en) * | 2015-12-07 | 2016-05-04 | 大连理工大学 | Method for manufacturing flexible strain sensor by utilizing macroscopic net structure carbon nano coil |
| CN110184731A (en) * | 2019-05-30 | 2019-08-30 | 浙江理工大学 | A kind of fabric sensor and its application with negative pressure inhibition effect |
| CN110205867A (en) * | 2019-06-14 | 2019-09-06 | 陕西科技大学 | A kind of multi-functional paper base flexible sensing material and its preparation method and application |
| CN110423371A (en) * | 2019-08-01 | 2019-11-08 | 陕西科技大学 | A kind of degradable multifunction flexible sensing material and preparation method thereof and the sensor being made from it |
| CN110736559A (en) * | 2019-10-09 | 2020-01-31 | 武汉纺织大学 | Flexible temperature-pressure sensor and preparation method and application thereof |
| CN111118889A (en) * | 2019-12-06 | 2020-05-08 | 广东工业大学 | Multifunctional flexible sensing fiber membrane and preparation method and application thereof |
| CN112229317A (en) * | 2020-10-09 | 2021-01-15 | 袁涌 | Flexible sensing film with large deformation performance and monitoring function and preparation method thereof |
| CN112325762A (en) * | 2020-09-14 | 2021-02-05 | 兰州大学 | Graphene multifunctional thin film sensor and preparation method thereof |
| CN113201155A (en) * | 2021-03-22 | 2021-08-03 | 浙江理工大学 | Method for simply and rapidly preparing cellulose membrane-based sensor |
| CN113215822A (en) * | 2021-04-30 | 2021-08-06 | 杭州师范大学 | Multifunctional stretchable breathable sensing material based on oriented nanofibers |
| CN113249961A (en) * | 2021-04-25 | 2021-08-13 | 北京邮电大学 | Flexible device structure based on conductive fiber network and preparation method and application thereof |
-
2021
- 2021-09-13 CN CN202111070354.XA patent/CN113832553B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110051775A1 (en) * | 2009-08-26 | 2011-03-03 | Ut-Battelle, Llc | Carbon nanotube temperature and pressure sensors |
| CA2832842A1 (en) * | 2013-11-07 | 2015-05-07 | Cleveland Medical Polymers, Inc. | Polymer nano-composites as dry sensor material for biosignal sensing |
| CN105547138A (en) * | 2015-12-07 | 2016-05-04 | 大连理工大学 | Method for manufacturing flexible strain sensor by utilizing macroscopic net structure carbon nano coil |
| CN110184731A (en) * | 2019-05-30 | 2019-08-30 | 浙江理工大学 | A kind of fabric sensor and its application with negative pressure inhibition effect |
| CN110205867A (en) * | 2019-06-14 | 2019-09-06 | 陕西科技大学 | A kind of multi-functional paper base flexible sensing material and its preparation method and application |
| CN110423371A (en) * | 2019-08-01 | 2019-11-08 | 陕西科技大学 | A kind of degradable multifunction flexible sensing material and preparation method thereof and the sensor being made from it |
| CN110736559A (en) * | 2019-10-09 | 2020-01-31 | 武汉纺织大学 | Flexible temperature-pressure sensor and preparation method and application thereof |
| CN111118889A (en) * | 2019-12-06 | 2020-05-08 | 广东工业大学 | Multifunctional flexible sensing fiber membrane and preparation method and application thereof |
| CN112325762A (en) * | 2020-09-14 | 2021-02-05 | 兰州大学 | Graphene multifunctional thin film sensor and preparation method thereof |
| CN112229317A (en) * | 2020-10-09 | 2021-01-15 | 袁涌 | Flexible sensing film with large deformation performance and monitoring function and preparation method thereof |
| CN113201155A (en) * | 2021-03-22 | 2021-08-03 | 浙江理工大学 | Method for simply and rapidly preparing cellulose membrane-based sensor |
| CN113249961A (en) * | 2021-04-25 | 2021-08-13 | 北京邮电大学 | Flexible device structure based on conductive fiber network and preparation method and application thereof |
| CN113215822A (en) * | 2021-04-30 | 2021-08-06 | 杭州师范大学 | Multifunctional stretchable breathable sensing material based on oriented nanofibers |
Non-Patent Citations (3)
| Title |
|---|
| SHIHONG XU 等: "Flexible, self-powered and multi-functional strain sensors comprising a hybrid of carbon nanocoils and conducting polymers", 《CHEMICAL ENGINEERING JOURNAL》 * |
| 冯春林: "碳纳米管薄膜传感器的制备及其传感特性研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 邓承浩: "碳纳米线圈的基础物性研究及其可拉伸应变传感器的制备", 《中国博士学位论文全文数据库 信息科技辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113832553B (en) | 2022-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | All‐fiber structured electronic skin with high elasticity and breathability | |
| Chen et al. | Flexible, conductive, and anisotropic thermoplastic polyurethane/polydopamine/MXene foam for piezoresistive sensors and motion monitoring | |
| Yu et al. | Patterned, highly stretchable and conductive nanofibrous PANI/PVDF strain sensors based on electrospinning and in situ polymerization | |
| Wang et al. | Fabrication of ultra-high working range strain sensor using carboxyl CNTs coated electrospun TPU assisted with dopamine | |
| CN110736559B (en) | Flexible temperature-pressure sensor and preparation method and application thereof | |
| CN111118889B (en) | Multifunctional flexible sensing fiber membrane and preparation method and application thereof | |
| Xiao et al. | High‐strain sensors based on ZnO nanowire/polystyrene hybridized flexible films | |
| KR102208377B1 (en) | Fiber cposite and preparing method of the same | |
| CN107192485A (en) | A kind of multifunctional nano fiber sensor of flexible extensible and preparation method thereof | |
| CN111944167B (en) | Conductive hydrogel and preparation method and application thereof | |
| US11530909B2 (en) | Fiber composite and preparing method of the same | |
| Tang et al. | Highly conductive, washable and super-hydrophobic wearable carbon nanotubes e-textile for vacuum pressure sensors | |
| Wang et al. | Superhydrophobic, biocompatible and durable nanofiber composite with an asymmetric structure for anisotropic strain sensing and body motion detection | |
| CN110687169A (en) | Humidity-sensitive carbon nanotube/graphene/organic composite flexible material, humidity sensor and preparation method thereof | |
| CN110699949B (en) | Flexible self-adhesive cloth with pressure/friction force sensing function, flexible mechanical sensor and preparation method of flexible mechanical sensor | |
| CN104963089A (en) | Soft ventilating electrode thin film material, touch sensor and preparation method for touch sensor | |
| Xiao et al. | Ultrasensitive and highly stretchable fibers with dual conductive microstructural sheaths for human motion and micro vibration sensing | |
| Wang et al. | Biocompatible liquid metal coated stretchable electrospinning film for strain sensors monitoring system | |
| Lee et al. | Highly stretchable and sensitive strain sensors based on single-walled carbon nanotube-coated nylon textile | |
| CN112179530B (en) | Flexible pressure sensor based on double-sided microstructure electrode and paper and preparation method | |
| Wang et al. | Strain sensor with high sensitivity and large response range based on self-assembled elastic-sliding conductive networks | |
| Lee et al. | Highly flexible triboelectric nanogenerators with electrospun PVDF-TrFE nanofibers on MWCNTs/PDMS/AgNWs composite electrodes | |
| Xu et al. | A supersensitive wearable sensor constructed with PDMS porous foam and multi-integrated conductive pathways structure | |
| CN113832553B (en) | Preparation method of temperature-strain dual-function sensing integrated breathable film | |
| Cheng et al. | Multifunctional Ti3C2Tx MXene/nanospheres/Ti3C2Tx MXene/thermoplastic polyurethane electrospinning membrane inspired by bean pod structure for EMI shielding and pressure sensing |
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 |