CN116659677A - MXene interface coupling enhanced pyroelectric infrared sensor and preparation method thereof - Google Patents
MXene interface coupling enhanced pyroelectric infrared sensor and preparation method thereof Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors
- G01J5/35—Electrical features thereof
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- H10N15/00—Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using the Nernst-Ettingshausen effect
- H10N15/10—Thermoelectric devices using thermal change of the dielectric constant, e.g. working above and below the Curie point
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Abstract
The invention relates to an MXene interface coupling enhancement type pyroelectric infrared sensor, which comprises a bottom flexible packaging layer, a bottom electrode, a nano composite film, a top electrode and a top flexible packaging layer which are arranged from bottom to top, wherein the nano composite film is a composite fiber material of a piezoelectric polymer PVDF and a two-dimensional material MXene, and in the curing process of the composite fiber material, the hydrogen bond effect between hydroxyl (-OH) on the surface of the MXene and difluoromethylene (-CF 2) of the piezoelectric polymer is utilized to promote the all-trans molecular configuration of the piezoelectric polymer, so that the spontaneous polarization and pyroelectric performance of the piezoelectric polymer are improved, and meanwhile, the photothermal conversion efficiency of the MXene is utilized to promote the pyroelectric effect of the nano composite film on infrared irradiation, so that the responsiveness and sensitivity to external infrared radiation are improved.
Description
Technical Field
The invention belongs to the field of nano materials and micro-nano energy sources, and particularly relates to an MXene interface coupling enhanced pyroelectric infrared sensor and a preparation method thereof.
Background
In a large environment where energy is short, development and utilization of new energy is urgent, and waste heat in the environment can be utilized in addition to searching for typical renewable energy sources such as wind energy, solar energy, water energy, tidal energy, and the like. In order to collect these energy sources, the scientific researchers put their eyes on the pyroelectric infrared sensor, which can convert the temperature change in the environment into electric energy, which is a very common phenomenon, so that the pyroelectric infrared sensor is a flexible scheme with low cost, high efficiency and simplicity. The novel sensor can collect waste heat in the environment and convert the waste heat into electric energy to drive microminiature electronic equipment through a pyroelectric effect, and has a wide application prospect.
The development of pyroelectric infrared sensors is not separated from the research of pyroelectric materials, and the current pyroelectric materials are divided into: single crystal materials, metal oxide ceramic materials, and polymeric organic polymer materials. The single crystal material has a narrow working range and high manufacturing cost, so that the wide application of the single crystal material is limited to a great extent. The metal oxide ceramic material has low Curie temperature, which limits the application of the material only at normal temperature, and has large dielectric loss and temperature coefficient, so that the application of the material is limited to a certain extent. The polymer organic polymer material is mainly PVDF, can be used for preparing film devices with any shape and any thickness, has low production cost and extremely simple process, has the advantages of compactness, softness, small thermal stress, flexibility, small dielectric constant, low heat conductivity and the like, provides a new direction for the development of pyroelectric detection, and has great prospect in the direction of a wearable sensor due to the characteristic of flexibility. However, the performance of the pyroelectric infrared sensor today is in a bottleneck period, and how to further improve the pyroelectric performance is also becoming a research hotspot.
Meanwhile, in order to raise the output signal of the pyroelectric infrared sensor by a further height, researchers have applied a photothermal conversion material to the pyroelectric infrared sensor. The pyroelectric infrared sensor can absorb and store near-infrared radiation from the surrounding environment such as sunlight, human bodies, animals and the like into internal heat energy through high-efficiency photo-thermal conversion efficiency under the action of a photo-thermal conversion material, and then converts the heat energy into electric energy through a pyroelectric effect. The current common photo-thermal conversion materials comprise graphene, graphene Oxide (GO), reduced graphene oxide (rGO), carbon nanotubes and the like, and have the defects of high price, insufficient photo-thermal conversion efficiency and the like, although the materials have high specific surface area, are easy to surface functionalization and excellent electrical and optical properties.
Disclosure of Invention
The invention aims to solve the technical problems existing in the prior art and provides an MXene interface coupling enhanced pyroelectric infrared sensor and a preparation method thereof. In order to further improve the light absorption rate of the infrared detector, the invention introduces a material MXene with excellent light-heat conversion efficiency to prepare the nano composite film of MXene and the piezoelectric polymer, wherein interface coupling exists between the MXene in the nano composite film and the piezoelectric polymer, namely hydrogen bonding between hydroxyl (-OH) on the surface of the MXene and difluoromethylene (-CF 2) in a molecular chain of the piezoelectric polymer is utilized in the process of electrostatic spinning PVDF, so that the all-trans molecular configuration of the piezoelectric polymer is induced, and the spontaneous polarization intensity and the pyroelectric performance of the composite film are further improved. In addition, MXene is used as a high-efficiency photo-thermal conversion material, so that external incident light energy can be efficiently converted into heat energy, and a hydrogen bond formed with a piezoelectric polymer further promotes thermoelectric conduction, so that the change of infrared radiation flux can be converted into an alternating output electric signal by utilizing a pyroelectric effect. The invention fully utilizes the polarization enhancement effect of the MXene interface and the photo-thermal conversion characteristic of the MXene, and improves the response rate and the sensitivity to external infrared radiation.
In order to solve the technical problems, the embodiment of the invention provides an MXene interface coupling enhancement type pyroelectric infrared sensor, which comprises a bottom flexible packaging layer 5, a bottom electrode 4, a nano composite film 3, a top electrode 2 and a top flexible packaging layer 1 which are arranged from bottom to top; the nano composite film 3 is a composite of a piezoelectric polymer and a two-dimensional material MXene, and in the curing process of the composite, the all-trans molecular configuration of the piezoelectric polymer is promoted by virtue of the hydrogen bond action between hydroxyl (-OH) on the surface of the MXene and difluoromethylene (-CF 2) of the piezoelectric polymer, the spontaneous polarization intensity and the pyroelectric performance of the piezoelectric polymer are promoted, and meanwhile, the photothermal conversion efficiency of the MXene is utilized, the pyroelectric effect of the nano composite film on infrared irradiation is promoted, so that the response and the sensitivity to external infrared radiation are increased.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the nanocomposite film 3 is prepared by an electrostatic spinning method, a hot pressing method or a casting method.
Further, the piezoelectric polymer is selected from one of polyvinylidene fluoride (PVDF), polytrifluoroethylene (PTrFE), polyvinylidene fluoride-co-trifluoroethylene P (VDF-TrFE) and polyvinylidene fluoride-co-hexafluoropropylene P (VDF-HFP).
Further, the material used for the top electrode is transparent conductive ITO, and the material used for the bottom electrode is copper, aluminum or silver metal.
In order to solve the above technical problems, an embodiment of the present invention provides a method for preparing the MXene interface coupling enhanced pyroelectric infrared sensor, including the following steps:
s1: preparing a bottom flexible packaging layer 5;
s2: forming a bottom electrode 4 on the bottom flexible encapsulation layer 5;
s3: forming a nano composite film 3 on the bottom electrode 4 by adopting an electrostatic spinning method, a hot pressing method or a casting method;
s4: forming a top electrode 2 on the nanocomposite film 3;
s5: a top flexible encapsulation layer 1 is formed on the top electrode 2.
Further, the preparation of the nanocomposite film 3 includes the steps of:
s31: dissolving 30-80mg of MXene powder in a mixed solution of N, N-dimethylformamide and acetone, and carrying out ultrasonic treatment for 1-3h, wherein the volume ratio of the N, N-dimethylformamide to the acetone is 3:2, so as to obtain a first mixed solution;
s32: adding 0.5-3.5g polyvinylidene fluoride PVDF particles into the first mixed solution, magnetically stirring for 1-3h under the water bath condition of 40-60 ℃, and then carrying out ultrasonic treatment for 30-60min to obtain a second mixed solution;
s33: pouring the second mixed solution into a syringe, placing the syringe on a propeller, and preparing for electrostatic spinning;
s34: carrying out electrostatic spinning for 1-3h, setting the flow rate to 8-12 mu L/min, the voltage to 15-20kV, and setting the spinning temperature to 40-60 ℃;
s35: and taking out the film after electrostatic spinning, and placing the film in a baking oven at 50-60 ℃ for baking for 10-30min to obtain the nano composite film.
The working principle of the invention is as follows:
MXene is a new two-dimensional material, mainly composed of a series of transition metals and C or N, the lamellar structure of which is covered by a layer of terminal groups, and for MXene materials prepared by liquid phase etching, the surface terminals of the MXene materials are oxygen, hydroxyl, fluorine or chlorine groups. MXnes has physical and chemical properties such as high specific surface area, high electron conductivity, hydrophilicity, surface functional group controllability and the like, and is widely applied to the fields of lithium batteries, catalysis, solar energy development and utilization and the like which relate to multi-energy conversion. In addition, the MXene material also has excellent photo-thermal conversion performance, the multi-layer structure of the MXene material can realize multi-stage reflection and absorption of incident sunlight, the photo-thermal conversion efficiency of part of the material is close to 100%, the photo-thermal absorption capacity of the material is far higher than that of CNTs, and the MXene material is a promising photo-thermal material.
The invention utilizes the polarization enhancement effect of the MXene interface and the photo-thermal conversion characteristic of the MXene,the response rate and the sensitivity to external infrared radiation are improved. The local dipole moment of the piezoelectric polymer composite material is guided by introducing MXene so as to improve the content of a high-voltage electrical performance phase (beta phase) in the piezoelectric polymer. Due to the hydroxyl (-OH) on the surface of MXene and the difluoromethylene (-CF) in the molecular chain of the piezoelectric polymer 2 ) Under the condition that PVDF is selected as the piezoelectric polymer, the hydrogen bonding action can induce PVDF alpha phase to beta phase conversion (all-trans molecular configuration), thereby improving the spontaneous polarization intensity and the pyroelectric performance of the composite film. Meanwhile, MXene is used as a high-efficiency photo-thermal conversion material, so that external incident light energy can be efficiently converted into heat energy, and then the temperature change is converted into an electric signal by utilizing the pyroelectric effect.
After a proper amount of MXene is introduced, the spontaneous polarization intensity and the pyroelectric performance of the composite film are greatly improved. For piezoelectric polymers, the piezoelectric coefficient is proportional to the spontaneous polarization intensity, as shown in equation (1):
d 33 ＝2P S Q 33 ε 33 (1)
wherein P is S Is spontaneous polarization intensity, Q 33 For the amount of induced charge, ε, on the surface of the film 33 D is the effective dielectric constant 33 Is a piezoelectric coefficient.
From equation (1), it is known that the increase in spontaneous polarization intensity can increase the piezoelectric coefficient of PVDF.
When the temperature of the pyroelectric material changes, the spontaneous polarization intensity changes, so that the phenomenon that charges are generated on the surface is a pyroelectric effect, and the magnitude of the pyroelectric effect is shown as a pyroelectric coefficient formula (2):
P＝dP s /dT (2)
in the formula (2), P is a pyroelectric coefficient, P S Is spontaneous polarization intensity, and T is temperature. It can be seen that the pyroelectric coefficient of the nanocomposite film was increased when MXene was introduced. Meanwhile, the high-efficiency photo-thermal conversion rate of MXene can be utilized to efficiently convert the light energy absorbed by the composite film into heat energy, so that the temperature change rate of the pyroelectric material is improved, and then the temperature is increased by utilizing the pyroelectric effectThe degree change converts the electric signal, and the response rate and the sensitivity of the device to external infrared radiation are improved.
The beneficial effects of the invention are as follows: the invention provides an MXene interface coupling enhanced pyroelectric infrared sensor, which solves the problem of waste heat utilization in the environment. Compared with the traditional pyroelectric sensor, the nano composite film is a composite fiber material of a piezoelectric polymer and a two-dimensional material MXene, and utilizes hydroxyl (-OH) on the surface of the MXene and difluoromethylene (-CF) in a molecular chain of the piezoelectric polymer in the electrostatic spinning process 2 ) And the hydrogen bond action among the functional groups induces the all-trans molecular configuration of the piezoelectric polymer, so as to improve the spontaneous polarization intensity and the pyroelectric performance of the composite film. In addition, MXene is used as a high-efficiency photo-thermal conversion material, so that external incident light energy can be efficiently converted into heat energy, and a hydrogen bond formed with a piezoelectric polymer further promotes thermoelectric conduction, so that the change of infrared radiation flux can be converted into an alternating output electric signal by utilizing a pyroelectric effect. The invention fully utilizes the polarization enhancement effect of the MXene interface and the photo-thermal conversion characteristic of the MXene, and improves the response rate and the sensitivity to external infrared radiation. The whole process is spontaneous, no additional power supply is needed, and the method is high in practicability, low in cost, high in reliability and simple to operate. The prepared device has the advantages of flexibility, wearable performance and the like, expands the application range of the pyroelectric infrared sensor, and provides a new scheme for optimizing the pyroelectric sensor.
Drawings
FIG. 1 is a block diagram of an MXene interface coupling enhanced pyroelectric infrared sensor according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of an electrospun process for preparing a nanocomposite film;
FIG. 3 is a schematic structural diagram of hydrogen bonding between the-OH functional groups of the MXene surface and the difluoromethylene (-CF 2) piezoelectric polymer in the nanocomposite film.
In the drawings, the list of components represented by the various numbers is as follows:
1 is a top flexible encapsulation layer; 2 is a top electrode; 3 is a nano composite film; 4 is a bottom electrode; and 5 is a bottom flexible packaging layer.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, an MXene interface coupling enhanced pyroelectric infrared sensor according to a first embodiment of the present invention includes a bottom flexible encapsulation layer 5, a bottom electrode 4, a nanocomposite film 3, a top electrode 2, and a top flexible encapsulation layer 1, which are disposed from bottom to top; the nano composite film 3 is a composite of a piezoelectric polymer and a two-dimensional material MXene, and in the curing process of the composite, the all-trans molecular configuration of the piezoelectric polymer is promoted by virtue of the hydrogen bond action between hydroxyl (-OH) on the surface of the MXene and difluoromethylene (-CF 2) of the piezoelectric polymer, the spontaneous polarization intensity and the pyroelectric performance of the piezoelectric polymer are promoted, and meanwhile, the photothermal conversion efficiency of the MXene is utilized, the pyroelectric effect of the nano composite film on infrared irradiation is promoted, so that the response and the sensitivity to external infrared radiation are increased.
In the above embodiment, one lead is led out from each of the top electrode 2 and the bottom electrode 4 for measuring signals, and the top flexible packaging layer 1 and the bottom flexible packaging layer 5 are used for packaging and fixing the device.
The interface layering phenomenon exists between the piezoelectric polymer and the two-dimensional material MXene in the nano composite film 3, the MXene material can absorb near infrared light, then the light energy is converted into heat energy by means of photo-thermal conversion, the heat energy is then transferred into the piezoelectric polymer, the piezoelectric polymer has a pyroelectric effect, temperature change caused by the transferred heat energy can be further converted into an electric signal to be output, and therefore the interface layering is beneficial to light absorption and conversion. And due to the electrostatic attraction effect of the electrostatic spinning nozzle, the MXene two-dimensional material gathers on the spinning surface, which is helpful for absorbing and converting infrared light.
The hydrogen bonding between the-OH functional groups of the MXene surface and the piezoelectric polymer difluoromethylene (-CF 2) facilitates heat transfer to the PVDF.
The nano composite film 3 has good mechanical toughness, and is beneficial to improving the beta-phase content in a long-range order while improving the mechanical toughness of spinning.
Near infrared light irradiates the sensor after being chopped, absorbed infrared light can be converted into heat energy through the excellent photo-thermal conversion efficiency of MXene, the temperature change of the infrared light is improved, and the temperature change is converted into electric energy to be output through a pyroelectric effect, so that energy collection is achieved.
Alternatively, the nanocomposite film 3 is prepared by an electrospinning method, a hot pressing method, or a casting method.
In the above embodiment, the addition of the conductive MXene two-dimensional material is helpful for electric field polarization, so that the piezoelectric polymer molecular chains are arranged according to the electric field direction of the nozzle opening when the electrostatic spinning preparation is performed, the spontaneous electric field strength of the piezoelectric polymer molecular chains is further enhanced, and meanwhile, the addition of the high conductive MXene improves the spontaneous polarization and pyroelectric performance of the piezoelectric polymer due to percolation effect.
And (3) electrostatic spinning of a three-dimensional skeleton fibrous structure, which is beneficial to light absorption, conversion and pyroelectric.
Optionally, the piezoelectric polymer is selected from one of polyvinylidene fluoride (PVDF), polytrifluoroethylene (PTrFE), polyvinylidene fluoride-co-trifluoroethylene P (VDF-TrFE), and polyvinylidene fluoride-co-hexafluoropropylene P (VDF-HFP).
Optionally, the material used for the top electrode is transparent conductive ITO, and the material used for the bottom electrode is copper, aluminum or silver metal.
The second embodiment of the present invention provides a method for preparing the MXene interface coupling enhanced pyroelectric infrared sensor according to the first embodiment, comprising the following steps:
s1: preparing a bottom flexible packaging layer 5;
s2: forming a bottom electrode 4 on the bottom flexible encapsulation layer 5;
s3: forming a nano composite film 3 on the bottom electrode 4 by adopting an electrostatic spinning method, a hot pressing method or a casting method;
s4: forming a top electrode (2;
s5: a top flexible encapsulation layer 1 is formed on the top electrode 2.
Alternatively, the nanocomposite film 3 is prepared using a composite of a piezoelectric polymer and a two-dimensional material MXene by the steps of:
s31: 30-80mg of MXene powder is dissolved in 6mL of mixed solution of N, N-dimethylformamide and 4mL of acetone (the volume ratio is 3:2), and the ultrasonic treatment is carried out for 1-3h, so that the dispersibility of the nano particles is ensured;
s32: adding 0.5-3.5g polyvinylidene fluoride PVDF particles, magnetically stirring for 1-3h at 40-60 ℃ in water bath to completely dissolve, and performing ultrasonic treatment for 30-60min to obtain uniform and stable mixed solution;
s33: pouring the mixed solution into a syringe with the volume of 10mL, placing the syringe on a propeller, and preparing for electrostatic spinning, as shown in figure 2;
s34: carrying out electrostatic spinning for 1-3h, setting the flow rate to 8-12 mu L/min, the voltage to 15-20kV, and setting the spinning temperature to 40-60 ℃;
s35: and taking out the film after electrostatic spinning, and placing the film in a baking oven at 50-60 ℃ for baking for 10-30min to obtain the nano composite film.
FIG. 3 is a schematic diagram showing the structure of hydrogen bonds formed between-OH functional groups on the surface of MXene in the nanocomposite film and difluoromethylene (-CF 2) as a piezoelectric polymer, and it can be seen from FIG. 3 that the hydrogen bonds formed induce conversion of PVDF alpha phase to beta phase, thereby improving the spontaneous polarization and pyroelectric properties of the nanocomposite film.
In the MXene interface coupling enhancement type pyroelectric infrared sensor, hydrogen bonding between hydroxyl (-OH) on the surface of MXene and difluoromethylene (-CF 2) functional groups in a piezoelectric polymer molecular chain is utilized to induce the all-trans molecular configuration of the piezoelectric polymer in the curing process of the compound, so that the spontaneous polarization intensity and the pyroelectric performance of the compound film are improved. In addition, MXene is used as a high-efficiency photo-thermal conversion material, so that external incident light energy can be efficiently converted into heat energy, and a hydrogen bond formed with a piezoelectric conductive polymer further promotes thermoelectric conduction, so that the change of infrared radiation flux can be converted into alternating output electric signals by utilizing the pyroelectric effect. The invention fully utilizes the polarization enhancement effect of the MXene interface and the photo-thermal conversion characteristic of the MXene, and improves the response rate and the sensitivity to external infrared radiation.
In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The MXene interface coupling enhanced pyroelectric infrared sensor is characterized by comprising a bottom flexible packaging layer (5), a bottom electrode (4), a nano composite film (3), a top electrode (2) and a top flexible packaging layer (1) which are arranged from bottom to top; the nanometer composite film (3) is a composite of a piezoelectric polymer and a two-dimensional material MXene, in the curing process of the composite, the full-trans molecular configuration of the piezoelectric polymer is promoted by virtue of the hydrogen bond action between hydroxyl (-OH) on the surface of the MXene and difluoromethylene (-CF 2) of the piezoelectric polymer, the spontaneous polarization intensity and the pyroelectric performance of the piezoelectric polymer are promoted, and meanwhile, the photothermal conversion efficiency of the MXene is utilized, the pyroelectric effect of the nanometer composite film on infrared irradiation is promoted, so that the responsiveness and the sensitivity to external infrared radiation are increased.
2. The MXene interface coupling enhanced pyroelectric infrared sensor of claim 1, wherein said nanocomposite film (3) is prepared by an electrospinning method, a hot pressing method or a casting method.
3. The MXene interface coupling enhanced pyroelectric infrared sensor of claim 1, wherein said piezoelectric polymer is selected from one of polyvinylidene fluoride (PVDF), polyvinylidene fluoride (PTrFE), polyvinylidene fluoride-co-trifluoroethylene P (VDF-TrFE) and polyvinylidene fluoride-co-hexafluoropropylene P (VDF-HFP).
4. The MXene interface coupling enhanced pyroelectric infrared sensor of claim 1, wherein said top electrode is made of transparent conductive ITO and said bottom electrode is made of copper, aluminum or silver metal.
5. A method of manufacturing an MXene interface coupling enhanced pyroelectric infrared sensor as recited in any one of claims 1-4 comprising the steps of:
s1: preparing a bottom flexible encapsulation layer (5);
s2: forming a bottom electrode (4) on the bottom flexible encapsulation layer (5);
s3: forming a nano composite film (3) on the bottom electrode (4) by adopting an electrostatic spinning method, a hot pressing method or a casting method;
s4: forming a top electrode (2) on the nanocomposite film (3);
s5: a top flexible encapsulation layer (1) is formed on the top electrode (2).
6. The MXene interface coupling enhanced pyroelectric infrared sensor of claim 5, wherein said nanocomposite film (3) is prepared by the steps of:
s31: dissolving 30-80mg of MXene powder in a mixed solution of N, N-dimethylformamide and acetone, and carrying out ultrasonic treatment for 1-3h, wherein the volume ratio of the N, N-dimethylformamide to the acetone is 3:2, so as to obtain a first mixed solution;
s32: adding 0.5-3.5g polyvinylidene fluoride PVDF particles into the first mixed solution, magnetically stirring for 1-3h under the water bath condition of 40-60 ℃, and then carrying out ultrasonic treatment for 30-60min to obtain a second mixed solution;
s33: pouring the second mixed solution into a syringe, placing the syringe on a propeller, and preparing for electrostatic spinning;
s34: carrying out electrostatic spinning for 1-3h, setting the flow rate to 8-12 mu L/min, the voltage to 15-20kV, and setting the spinning temperature to 40-60 ℃;
s35: and taking out the film after electrostatic spinning, and placing the film in a baking oven at 50-60 ℃ for baking for 10-30min to obtain the nano composite film.
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| CN117782379A (en) * | 2024-02-27 | 2024-03-29 | 太原理工大学 | Piezoelectric/pyroelectric dual-function flexible high-temperature-resistant sensor |
| CN117782379B (en) * | 2024-02-27 | 2024-05-14 | 太原理工大学 | Piezoelectric/pyroelectric dual-function flexible high-temperature-resistant sensor |
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