An ultrathin, breathable, fully decoupled, flexible pressure-temperature dual-mode sensor

Abstract

The present invention provides an ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor, the sensor comprises a seven-layer structure, the upper and lower layers are both TPU fiber packaging layers, and the middle structure is a thermal sensitive layer, PEDOT:PSS interdigital electrode, IL / TPU electrolyte, IL / TPU fiber membrane, and PEDOT:PSS / Co3O4 interdigital electrode from top to bottom. The dual-mode sensor signal of the present invention is interference-free, the temperature and pressure sensors are highly sensitive, have good air permeability, good hydrophobicity, and can prevent sweat; the present invention has a simple preparation process and strong operability.

Description

Technical Field

[0001] The invention belongs to the technical field of sensors, and in particular relates to an ultra-thin, breathable, fully decoupled, flexible pressure-temperature dual-mode sensor. Background Art

[0002] Flexible sensors with highly sensitive temperature and tactile sensing functions are key components for wearable devices to communicate with the external environment or the human body. In order to enable sensors to have pressure-temperature dual-mode sensing functions, many researchers have conducted extensive research on material preparation and selection. However, most of the reported dual-mode flexible sensors are based on one response (resistance change, capacitance change, voltage change, etc.), which causes signal crosstalk problems in the sensors and puts forward more stringent requirements for subsequent signal analysis circuits and systems, greatly limiting their application in real-time monitoring of temperature and pressure. In addition, the existing pressure-temperature dual-mode flexible sensors are too thick, have poor air permeability, and do not have sweat-proof and waterproof capabilities, which reduces the sensor's ability to adhere to the skin and the comfort of wearing.

[0003] In order to solve the above problems, we have prepared an ultra-thin, breathable, fully decoupled, flexible pressure-temperature dual-mode sensor from three aspects: structural design, material selection, and process preparation. The structure of this sensor integrates an independent pressure sensor based on the principle of supercapacitor and a temperature sensor based on the principle of resistance from top to bottom. The thermosensitive material of this sensor uses poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) and graphene with good thermal conductivity; the pressure-sensitive material uses an ionic liquid rich in anions and cations and high stability. The preparation process of this sensor uses an electrospinning process that can ensure that the sensor has a large number of micropores and microchannels and a 3D printing technology that can accurately control the thickness of the sensitive layer and the electrode layer. Summary of the invention

[0004] In view of this, the present invention aims to propose an ultra-thin, breathable, fully decoupled, flexible pressure-temperature dual-mode sensor.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] An ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor, the sensor comprises a seven-layer structure, the upper and lower layers are TPU fiber packaging layers, the middle structure is a thermal sensitive layer, PEDOT:PSS interdigital electrodes, IL / TPU electrolyte layer, IL / TPU fiber membrane, and PEDOT:PSS / Co 3 O 4 Interdigitated electrodes.

[0007] Furthermore, the thermal sensitive layer contains the temperature sensitive material PEDOT:PSS, and graphene and PVA having a micro-nano sheet structure are added to the thermally sensitive PEDOT:PSS solution.

[0008] Furthermore, the PEDOT:PSS / Co 3 O 4 Co in interdigitated electrodes 3 O 4 Micropores and microsphere structures were introduced into the interior and surface of the interdigitated electrodes.

[0009] Furthermore, the IL / TPU electrolyte layer is obtained by mixing ionic liquid with TPU through an electrostatic spinning process.

[0010] Furthermore, the TPU fiber encapsulation layer is obtained by using an electrostatic spinning process on a TPU solution.

[0011] The present invention also provides a method for preparing an ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor, comprising the following steps:

[0012] Step 1: Prepare a TPU fiber encapsulation layer;

[0013] DMSO, DMF and THF are added to a beaker at a weight ratio of 1:4.5:4.5 and mixed, and then TPU particles are added to the above mixed solution at a ratio of 17wt.%, and then placed in a 60-70°C magnetic stirrer water bath and stirred for 2-3 hours until all TPU particles are completely dissolved, and then a 5ml or 10ml syringe equipped with a 19g needle is used to inhale the solution, and then installed on the electrospinning device, and the parameters are set to 15-27KV voltage, 0.1ml / min speed, and after spinning for 1-2 hours, a TPU fiber encapsulation layer is obtained;

[0014] Step 2: preparing IL / TPU electrolyte layer;

[0015] DMSO, DMF and THF are added to a beaker at a weight ratio of 1:4.5:4.5 and mixed, and then TPU particles are added to the mixed solution at a ratio of 17wt.%, and then ionic liquid is added to the mixed solution at a ratio of 0-20wt.%, and the mixed solution is placed in a water bath pot with a magnetic stirrer at 60-70°C and stirred for 2-3 hours until all TPU particles are completely dissolved, and then a 5ml or 10ml syringe equipped with a 19g needle is used to inhale the solution, and the solution is installed on the electrospinning device, and the parameters are set to 25-35KV voltage, 0.001-0.005ml / min speed, and IL / TPU fiber electrolyte is obtained after spinning for 10-20 hours;

[0016] Step 3: Preparation of PEDOT:PSS interdigitated electrodes;

[0017] A 1-5wt.% concentration of PEDOT:PSS solution was placed in a dispensing tube with an inner diameter of 0.06-0.1 mm, mounted on a 3D printer, and printed onto the IL / TPU fiber membrane according to the drawing at an air pressure of 40-100 Pa;

[0018] Step 4: preparing a heat-sensitive layer;

[0019] Graphene, PEDOT:PSS, PVA particles, and deionized water were added to a beaker in a weight ratio of 5:5:1:4 or 2.5:5:1:4 or 1.25:5:1:4, and then placed in a water bath with a magnetic stirrer at 80-100°C for 1-2 hours until all PVA particles were completely dissolved, and then placed in a dispensing tube with an inner diameter of 0.13-0.15 mm, installed on a 3D printer, and printed onto the PEDOT:PSS interdigitated electrodes according to the drawing at an air pressure of 400 Pa;

[0020] Step 5: Preparation of PEDOT:PSS / Co 3 O 4 Interdigitated electrodes;

[0021] Co 3 O 4 ,PEDOT:PSS solution, PVA and deionized water were added into a beaker in a weight ratio of 0.05:5:1:4, and then placed in a water bath with a magnetic stirrer at 80-100°C for 1-2 hours until all PVA particles were completely dissolved, and then placed in a dispensing tube with an inner diameter of 0.13-0.15mm, installed on a 3D printer, and printed onto the IL / TPU fiber electrolyte according to the drawing at an air pressure of 400Pa;

[0022] Step 6: Place the TPU hot melt adhesive film on the edge of each part, then install it from top to bottom, and finally place it on a heating table at 60-100°C to obtain a pressure-temperature dual-mode sensor.

[0023] The present invention also provides a wearable device, comprising at least one dual-mode sensor disclosed above.

[0024] Compared with the prior art, the ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor described in the present invention has the following advantages:

[0025] The dual-mode sensor signal of the present invention has no interference, the temperature and pressure sensors have high sensitivity, good air permeability, good hydrophobicity, and can prevent sweat; the preparation process of the present invention is simple and the operability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the structure of the dual-mode sensor unit of the present invention;

[0028] Figure 2 This is a schematic diagram of preparing the TPU fiber encapsulation layer of the present invention;

[0029] Figure 3 Schematic diagram of the preparation of the IL / TPU electrolyte layer of the present invention;

[0030] Figure 4 Schematic diagram of the preparation of the PEDOT:PSS interdigitated electrode of the present invention;

[0031] Figure 5 Schematic diagram of preparation of the heat sensitive layer of the present invention;

[0032] Figure 6 PEDOT:PSS / Co 3 O 4 Schematic diagram of the preparation of interdigitated electrodes;

[0033] Figure 7 An electron microscope image of the dual-mode sensor structure of the present invention;

[0034] Figure 8 It is a schematic diagram of the temperature sensor principle of the present invention;

[0035] Fig. 9 It is a schematic diagram of the principle of the pressure sensor of the present invention;

[0036] Fig.10 It is a performance test schematic diagram of the temperature sensor of the present invention;

[0037] Fig.11 It is a performance test schematic diagram of the pressure sensor of the present invention;

[0038] Fig.12 It is a schematic diagram of the anti-interference ability test of the dual-mode sensor of the present invention.

[0039] Description of Reference Numerals

[0040] 1-temperature sensor; -pressure sensor; 3-TPU fiber encapsulation layer; 4-thermal sensitive layer; 5-PEDOT:PSS interdigital electrode; 6-IL / TPU electrolyte layer; 7-PEDOT:PSS / Co 3 O 4 Interdigitated electrode; 8-IL / TPU fiber membrane. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0045] The present invention provides an ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor, the specific structure of which is as follows: Figure 1 As shown in the figure, the structure of the sensor is to integrate an independent pressure sensor based on the pseudocapacitance principle and a temperature sensor based on the resistance principle from top to bottom. It contains 7 layers in total, including upper and lower TPU fiber encapsulation layers 3, a thermal sensitive layer containing temperature sensitive material PEDOT:PSS 4, PEDOT:PSS interdigital electrodes 5, anion- and cation-rich and breathable IL / TPU electrolyte 6, a low-density IL / TPU fiber membrane 8, and a PEDOT:PSS / Co containing pseudocapacitance effect. 3 O 4 The interdigitated electrodes 7.

[0046] Specifically, the thermal sensitive layer 4 contains the temperature sensitive material PEDOT:PSS. Graphene with a large amount of micro-nano sheet structure and easily foamed PVA are added to the thermally sensitive PEDOT:PSS solution, which effectively increases the thermal conductivity of the thermal sensitive layer, thereby improving the sensitivity of the temperature sensor 1.

[0047] Specifically, PEDOT:PSS / Co 3 O 4 In the interdigital electrode 7, Co added to the pressure interdigital electrode 3 O 4 Not only can the pressure sensor 2 be based on the pseudocapacitive effect with high capacitance, but also a large number of micropores and microsphere structures are introduced into the interior and surface of the interdigital electrodes, which effectively improves the sensitivity and resilience of the sensor.

[0048] Specifically, the IL / TPU electrolyte 6 is obtained by mixing ionic liquid with TPU through an electrospinning process, which can ensure that the electrolyte has a criss-cross nanofiber structure, effectively increasing the contact area between the electrode and the electrolyte, thereby improving the sensitivity of the sensor.

[0049] Specifically, the TPU fiber encapsulation layer 3 is obtained by using an electrostatic spinning process to prepare a TPU solution, and ensuring that the interior and the surface of the TPU fiber encapsulation layer have a large number of fiber structures can ensure that the sensor as a whole has good air permeability and ensure that the sensor is comfortable to wear for a long time.

[0050] The ultra-thin TPU fiber encapsulation layer prepared by BEN FAM using electrospinning technology not only has a microfiber structure but also has good hydrophobicity and air permeability. The air permeability allows the sensor to be in contact with human skin for a long time without damaging the skin; the hydrophobicity and sweat-proofness can ensure that human sweat does not enter the interior of the sensor, thereby improving the life of the sensor and the accuracy and stability of the monitoring signal.

[0051] The preparation process of the ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor unit of the present invention is as follows:

[0052] (1) Preparation of TPU fiber encapsulation layer: DMSO, DMF and THF were added to a beaker at a weight ratio of 1:4.5:4.5 and mixed, and then TPU particles were added to the above mixed solution at a ratio of 17wt.%, and then placed in a 60-70°C magnetic stirrer water bath and stirred for 2-3 hours until all TPU particles were completely dissolved, and then a 5ml or 10ml syringe equipped with a 19g needle was used to inhale the solution, and then installed on the electrospinning device, and the parameters were set to 15-27KV voltage, 0.1ml / min speed, and after spinning for 1-2 hours, a TPU fiber encapsulation layer was obtained. Figure 2 As shown;

[0053] (2) Preparation of IL / TPU electrolyte layer: DMSO, DMF and THF were added to a beaker at a weight ratio of 1:4.5:4.5 and mixed, and then TPU particles were added to the mixed solution at a ratio of 17wt.%, and then ionic liquid was added to the mixed solution at a ratio of 0-20wt.%, and the mixed solution was placed in a water bath with a magnetic stirrer at 60-70°C and stirred for 2-3 hours until all TPU particles were completely dissolved, and then a 5ml or 10ml syringe equipped with a 19g needle was used to inhale the solution, and the solution was installed on the electrospinning device, and the parameters were set to 25-35KV voltage and 0.001-0.005ml / min speed. After spinning for 10-20 hours, an IL / TPU fiber electrolyte was obtained. Figure 3 As shown;

[0054] (3) Preparation of PEDOT:PSS interdigitated electrodes: PEDOT:PSS solution with a concentration of 1-5 wt.% was placed in a dispensing tube with an inner diameter of 0.06-0.1 mm, installed on a 3D printer, and printed onto the IL / TPU fiber membrane according to the drawing at an air pressure of 40-100 Pa. Figure 4 shown.

[0055] (4) Preparation of thermosensitive layer: Graphene, PEDOT:PSS, PVA particles, and deionized water were added to a beaker in a weight ratio of 5:5:1:4 or 2.5:5:1:4 or 1.25:5:1:4, and then placed in a water bath with a magnetic stirrer at 80-100°C for 1-2 hours until all PVA particles were completely dissolved. Then, the mixture was placed in a dispensing tube with an inner diameter of 0.13-0.15 mm, installed on a 3D printer, and printed onto the PEDOT:PSS interdigitated electrodes according to the drawing at an air pressure of 400 Pa, as shown in FIG. Figure 5 shown.

[0056] (5)PEDOT:PSS / Co 3 O 4 Preparation of interdigital electrodes of Co / PVA 3 O 4 ,PEDOT:PSS solution, PVA and deionized water were added into a beaker in a weight ratio of 0.05:5:1:4, and then placed in a water bath with a magnetic stirrer at 80-100°C for 1-2 hours until all PVA particles were completely dissolved, and then placed in a dispensing tube with an inner diameter of 0.13-0.15mm, installed on a 3D printer, and printed onto the IL / TPU fiber electrolyte according to the drawing at an air pressure of 400Pa, such as Figure 6 shown.

[0057] (6) Place TPU hot melt adhesive film on the edge of each part, then install it from top to bottom, and finally place it on a heating table at 60-100°C to obtain a pressure-temperature dual-mode sensor.

[0058] The electron microscope image of the dual-mode sensor structure of the present invention is as follows Figure 7 As shown in the figure, (a)-(b) are cross-sectional electron micrographs of the sensor unit; (c) is a frontal electron micrograph of the thermosensitive layer; (d) is a cross-sectional electron micrograph of the interdigital electrode of the pressure sensor; (e) is an electron micrograph of the TPU fiber; and (f) is an electron micrograph of the IL / TPU fiber.

[0059] The working principle of the temperature sensor of the present invention is as follows Figure 8 As shown, PEDOT:PSS is a core-shell structure in which a conductive and hydrophobic PEDOT-rich core is surrounded by an insulating and hydrophilic PSS-rich shell. The increase in temperature causes the release of water molecules from the hydrophilic PSS, resulting in the contraction of the PSS shell. The distance between adjacent PEDOT cores decreases accordingly, thereby enhancing the electron hopping between PEDOT cores. Therefore, the resistance of PEDOT / PSS decreases with increasing temperature. After doping the relatively hydrophilic material G into the PEDOT:PSS solution, the G flakes are completely filled in the PSS, and the gaps between adjacent PEDOT:PSS nanoparticles do not affect the overall conductivity of PEDOT:PSS. Therefore, the composite mixture shows higher temperature sensitivity compared with little, more, or no G filling.

[0060] The working principle of the pressure sensor of the present invention is as follows Fig. 9 As shown in the figure, the pressure sensor is composed of two parts: the interdigital electrode layer and the IL / TPU fiber electrolyte layer. When pressure is applied to the sensor, the electrode layer and the fiber electrolyte layer of the sensor will deform under the action of pressure, resulting in a larger contact area between the electrolyte layer and the electrode, a smaller distance, and an increase in capacitance. When the pressure disappears, the upper and lower electrode electrolyte layers will return to their original state, and the capacitance will also return to its original value. The change in capacitance can be converted into an electrical signal and transmitted to the subsequent processing circuit, thereby monitoring the magnitude of the force.

[0061] The electrode and the fiber electrolyte layer form an electrode or electrolyte interface. When the electrode layer contacts the two sides of the electrolyte layer, under the action of an external power source, the internal surface charge of the electrode will absorb ions from the electrolyte. These ions form an interface layer on the electrolyte side of the electrode or electrolyte interface with a charge quantity equal to the charge quantity on the inner surface of the electrode and an opposite sign. Due to the potential difference on the electrode or electrolyte interface, the two layers of charge cannot cross the boundary and neutralize each other, thus forming a pseudocapacitor with a stable structure.

[0062] The performance of the temperature sensor is tested in the present invention. The prepared temperature sensor has good performance and good sensitivity: -0.04℃ at 25℃-50℃ -1 , -0.03℃ at 25℃-50℃ -1 (5-10 times that of PEDOT:PSS temperature sensors) (e.g. Fig.10 a); minimum resolution is 0.1°C, response time is 0.7s (such as Fig.10 b); has good stability, and the reciprocating experiment is basically error-free (such as Fig.10 c).

[0063] The performance of the pressure sensor is tested in the present invention. The prepared pressure sensor has good performance and good sensitivity: 147.19 kPa at 0-7 kPa -1 , 4.41 kPa at 25-85 kPa -1 ,(like Fig.11 b) This is due to the prepared PEDOT:PSS / Co 3 O 4 / PVA interdigitated electrodes have pseudocapacitive effects (such as Fig.11 a); the response time is 50ms (such as Fig.11 c); has good stability, and the reciprocating experiment is basically error-free (such as Fig.11 d).

[0064] The anti-interference test of the dual-mode sensor of the present invention is as follows Fig.12 As shown,

[0065] (a) The influence of different temperatures on the pressure sensor. The curve variation is very small, within 5%;

[0066] (b) The influence of pressure on the temperature sensor. The curve has almost no fluctuation and is not affected by pressure.

[0067] (c) The influence of bending angle on the temperature sensor. The curve has no fluctuation, and bending does not affect the sensitivity of the temperature sensor.

[0068] (d) The influence of humidity on the temperature sensor. The curve has no fluctuation and basically has no influence.

[0069] (e) The effect of humidity on the pressure sensor. The curve does not fluctuate and has basically no effect.

[0070] The pressure-temperature dual-mode sensor prepared by the present invention can sense pressure and temperature at the same time, can sense the temperature and pressure of a finger, the temperature and pressure of a water droplet, and the temperature and pulse of a person before and after exercise.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing an ultra-thin, breathable, fully decoupled, flexible pressure-temperature dual-mode sensor, characterized in that: The sensor consists of a seven-layer structure. The upper and lower layers are both TPU fiber packaging layers. The middle structure is composed of a thermal sensitive layer, a PEDOT:PSS interdigital electrode, an IL / TPU electrolyte layer, an IL / TPU fiber membrane, and a PEDOT:PSS / Co3O4 interdigital electrode from top to bottom. The preparation method comprises the following steps Step 1: Prepare a TPU fiber encapsulation layer; DMSO, DMF and THF are added to a beaker at a weight ratio of 1:4.5:4.5 and mixed, and then TPU particles are added to the above mixed solution at a ratio of 17wt.%, and then placed in a 60-70°C magnetic stirrer water bath and stirred for 2-3 hours until all TPU particles are completely dissolved, and then a 5ml or 10ml syringe equipped with a 19g needle is used to inhale the solution, and then installed on the electrospinning device, and the parameters are set to 15-27KV voltage, 0.1ml / min speed, and after spinning for 1-2 hours, a TPU fiber encapsulation layer is obtained; Step 2: preparing IL / TPU electrolyte layer; DMSO, DMF and THF are added to a beaker at a weight ratio of 1:4.5:4.5 and mixed, and then TPU particles are added to the mixed solution at a ratio of 17wt.%, and then ionic liquid is added to the mixed solution at a ratio of 0-20wt.%, and the mixed solution is placed in a water bath pot with a magnetic stirrer at 60-70°C and stirred for 2-3 hours until all TPU particles are completely dissolved, and then a 5ml or 10ml syringe equipped with a 19g needle is used to inhale the solution, and the solution is installed on the electrospinning device, and the parameters are set to 25-35KV voltage, 0.001-0.005ml / min speed, and IL / TPU fiber electrolyte is obtained after spinning for 10-20 hours; Step 3: Preparation of PEDOT:PSS interdigitated electrodes; A 1-5wt.% concentration of PEDOT:PSS solution was placed in a dispensing tube with an inner diameter of 0.06-0.1 mm, mounted on a 3D printer, and printed onto the IL / TPU fiber membrane according to the drawing at an air pressure of 40-100 Pa; Step 4: preparing a heat-sensitive layer; Graphene, PEDOT:PSS, PVA particles, and deionized water were added to a beaker in a weight ratio of 5:5:1:4 or 2.5:5:1:4 or 1.25:5:1:4, and then placed in a water bath with a magnetic stirrer at 80-100°C for 1-2 hours until all PVA particles were completely dissolved, and then placed in a dispensing tube with an inner diameter of 0.13-0.15 mm, installed on a 3D printer, and printed onto the PEDOT:PSS interdigitated electrodes according to the drawing at an air pressure of 400 Pa; Step 5: Preparation of PEDOT:PSS / Co3O4 interdigitated electrodes; Co3O4, PEDOT:PSS solution, PVA and deionized water were added into a beaker in a weight ratio of 0.05:5:1:4, and then placed in a water bath with a magnetic stirrer at 80-100°C and stirred for 1-2 hours until all PVA particles were completely dissolved. Then, the beaker was placed into a dispensing tube with an inner diameter of 0.13-0.15 mm, installed on a 3D printer, and printed onto the IL / TPU fiber electrolyte according to the drawing at an air pressure of 400 Pa. Step 6: Place the TPU hot melt adhesive film on the edge of each part, then install it from top to bottom, and finally place it on a heating table at 60-100°C to obtain a pressure-temperature dual-mode sensor.

2. The method for preparing an ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor according to claim 1, characterized in that: The thermal sensitive layer contains the temperature sensitive material PEDOT:PSS, and graphene and PVA with a micro-nano sheet structure are added to the thermally sensitive PEDOT:PSS solution.

3. The method for preparing an ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor according to claim 1, characterized in that: The Co3O4 in the PEDOT:PSS / Co3O4 interdigital electrode introduces micropores and microsphere structures into the interior and surface of the interdigital electrode.

4. The method for preparing an ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor according to claim 1, characterized in that: The IL / TPU electrolyte layer is obtained by mixing ionic liquid with TPU through an electrostatic spinning process.

5. The method for preparing an ultra-thin breathable fully decoupled flexible pressure-temperature dual-mode sensor according to claim 1, characterized in that: The TPU fiber encapsulation layer is obtained by using an electrostatic spinning process on a TPU solution.

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