Preparation method of toughness and conductivity synergistically enhanced high-performance hydrogel wearable sensor based on hydrophobic association

Abstract

The invention discloses a preparation method of a toughness and conductivity synergistically enhanced high-performance hydrogel wearable sensor based on hydrophobic association, which comprises the following steps: mixing a gelatin aqueous solution with MXene, and then adding lauryl sodium sulfate, NaCl and octadecyl methacrylate to prepare a micelle solution; adding acrylamide into the micelle solution, stirring and cooling, and then adding ammonium persulfate, N, N '-methylene bisacrylamide and N, N, N', N '-tetramethylethylenediamine; and finally, transferring the solution into a mold, and carrying out gelation reaction at room temperature. Therefore, the high-performance hydrogel with synergistically enhanced toughness and conductivity based on hydrophobic association is obtained. The gelatin / polyacrylamide / MXene hydrogel is obtained by introducing micelles into the hydrogel, utilizing a hydrophobic association method and adopting thermal initiation polymerization, and the gelatin / polyacrylamide / MXene hydrogel has the advantages of simple process, easiness in operation, controllable reaction conditions, high sensing sensitivity and large strain monitoring range, and can be applied to various occasions.

Description

Technical Field

[0001] This invention belongs to the field of flexible electronic materials technology, specifically relating to a method for preparing a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association. Background Technology

[0002] The widespread application of flexible electronic devices in fields such as intelligent robots, energy harvesting, human motion detection, and wearable sensors has attracted considerable attention. Currently, researchers have successfully constructed wearable flexible electronic devices based on various flexible substrates, including fabrics, sponges, aerogels, and hydrogel composites. Among these flexible substrates, conductive hydrogels have become an ideal material for fabricating flexible wearable strain sensors due to their excellent conductivity, tunable mechanical flexibility, ease of processing, and superior biocompatibility. By incorporating conductive materials into the hydrogel matrix, the constructed conductive hydrogels have been widely applied in implantable devices, artificial skin, and other fields.

[0003] However, the mismatch between conductive fillers and polymer networks often reduces the mechanical and electrical stability of hydrogels. Therefore, effective integration of conductive fillers and polymer networks is a prerequisite for ensuring the excellent performance of conductive hydrogels. However, due to the uneven dispersion of conductive fillers and the agglomeration effect during stretching, conductive hydrogel devices only perform well under small strains and have a limited operating range. The preparation of hydrogels with both excellent mechanical properties and excellent conductivity remains a challenge that urgently needs to be addressed. Summary of the Invention

[0004] Hydrophobic associative networks offer a novel approach to solving the aforementioned mechanical challenges. These networks can dissipate energy within the hydrogel, thereby resisting crack propagation. Micelles formed by the interaction of surfactants and hydrophobic segments are linked to hydrophilic segments through crosslinking points, effectively enhancing the mechanical properties of the hydrogel. However, tensile properties remain limited, and further exploration is needed to effectively incorporate conductive fillers into hydrophobic associative hydrogels. To address these issues, this invention aims to provide a hydrogel sensor construction scheme that combines excellent mechanical and electrical properties. This scheme achieves high tensile strength, high sensitivity, and a wide detection range simultaneously by effectively introducing hydrophobic associations. It is expected to have wide applications in personal health and medical monitoring, intelligent sports equipment, rehabilitation management, and human-computer interaction interfaces.

[0005] The purpose of this invention is to provide a method for fabricating a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association. This method involves introducing micelles within the hydrogel and using a thermally initiated polymerization process via hydrophobic association to obtain a gelatin / polyacrylamide / MXene hydrogel. This addresses the problems of complex fabrication processes and the inability to simultaneously achieve optimal mechanical and electrical properties in flexible hydrogel sensors.

[0006] The technical solution of this invention is: A method for fabricating a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association includes the following steps: (1) Preparation of MXene by in-situ etching of titanium aluminum carbide with hydrogen fluoride formed by lithium fluoride and hydrochloric acid; (2) Mix a certain mass concentration of gelatin aqueous solution with a certain mass of MXene, and then add sodium dodecyl sulfate, NaCl and octadecyl methacrylate to prepare a micelle solution for later use; (3) Add acrylamide to the solution prepared in step (2), stir and cool, then add ammonium persulfate, N,N'-methylenebisacrylamide and N,N,N',N'-tetramethylethylenediamine; finally, transfer the solution to a mold and carry out the gelation reaction at room temperature.

[0007] Furthermore, the mass of the lithium fluoride is 1 g.

[0008] Furthermore, the volume of the hydrochloric acid is 20 mL.

[0009] Furthermore, the concentration of the hydrochloric acid is 12 M.

[0010] Furthermore, the mass percentage concentration of the gelatin aqueous solution in step (2) is 3-12 wt%.

[0011] Further, the volume of the gelatin aqueous solution in step (2) is 10 mL.

[0012] Furthermore, in step (2), the final concentration of MXene added is 0.1-3 mg / mL.

[0013] Furthermore, in step (3), the mass of acrylamide is 1.5 g.

[0014] Furthermore, the mass of ammonium persulfate in step (3) is 0.03 g.

[0015] Further, in step (3), the mass of N,N'-methylenebisacrylamide is 1.5 mg.

[0016] Further, in step (3), the amount of N,N,N',N'-tetramethylethylenediamine used is 20 µL.

[0017] The advantages of this invention are: (1) By introducing micelles inside the hydrogel and using the hydrophobic association method, the gelatin / polyacrylamide / MXene hydrogel prepared by thermally initiated polymerization has good mechanical flexibility and excellent sensing performance, which solves the problem of complex preparation process and inability to balance mechanical and electrical properties of flexible hydrogel sensors.

[0018] (2) The gelatin / polyacrylamide / MXene hydrogel possesses excellent electrical and mechanical properties due to the introduction of a hydrophobic association method. Mechanically: Utilizing the hydrophobic association region as a dynamic and reversible physical cross-linking point, the hydrogel is endowed with high strength, high toughness, and self-healing properties through an efficient energy dissipation mechanism. Electrically: By introducing conductive nanomaterials and utilizing the open structure and compatibility of the hydrophobic network, an efficient and stable conductive pathway is constructed. The mechanical network and the conductive pathway are mutually compatible and mutually reinforcing in terms of microstructure. The dynamic physical cross-linking network ensures the reconfigurability and stability of the conductive pathway under deformation, while the rational introduction of conductive components can, in turn, enhance mechanical properties, achieving synergistic and excellent effects. We have prepared a high-performance hydrogel with both toughness and conductivity using a simple and rapid hydrophobic association method.

[0019] (3) High-performance hydrogels with synergistic enhancement of toughness and conductivity through hydrophobic association exhibit excellent conductivity, ultra-high sensitivity, and a wide strain sensing capability. Hydrophobic-associated hydrogels possess excellent mechanical tensile strength, demonstrating a strain monitoring range exceeding 500%. This patent solves the problem of the inability to simultaneously achieve both mechanical and electrical properties in conductive hydrogels, and can be widely applied in fields such as personal health and medical monitoring, intelligent sports equipment, rehabilitation management, and human-computer interaction interfaces. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the preparation process of the high-performance hydrogel based on hydrophobic association that synergistically enhances toughness and conductivity according to the present invention. Figure 2 In Figures a and b, we see scanning electron microscope images at different magnifications of the high-performance hydrogel prepared in Example 1, which is based on the synergistic enhancement of toughness and conductivity through hydrophobic association. Figure 3 The elemental distribution energy spectrum of the high-performance hydrogel with synergistic enhancement of toughness and conductivity based on hydrophobic association prepared in Example 1 is shown below. The corresponding elements are a for C, b for O, c for N, d for Na, e for Cl, and f for Ti. Figure 4 Optical image of the stretching process of the high-performance hydrogel with synergistic enhancement of toughness and conductivity based on hydrophobic association, prepared in Example 1; Figure 5The mechanical test diagrams of the high-performance hydrogel based on hydrophobic association and synergistic enhancement of toughness and conductivity of the present invention are shown. In the diagram, a is the tensile fracture curve with different gelatin concentrations, b is the strain and fracture force calculated from the tensile fracture curve, and c is the elastic modulus and toughness calculated from the tensile fracture curve. Figure 6 The sensor sensitivity curve of the high-performance hydrogel based on hydrophobic association and synergistic enhancement of toughness and conductivity of the present invention is shown. Figure 7 This is a strain sensing attempt of the high-performance hydrogel wearable sensor based on hydrophobic association to synergistically enhance toughness and conductivity, as presented in this invention, where a represents the test curves for 100% strain, b represents 200%, and c represents 500%. Detailed Implementation

[0021] A method for fabricating a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association specifically includes the following steps: (1) Preparation of MXene materials LiF was dissolved in hydrochloric acid solution, and Ti3AlC2 powder was slowly added to the solution. The mixture was stirred at 35°C for 24 hours, then centrifuged with deionized water and washed repeatedly until the pH of the supernatant was greater than 6. The precipitate was then removed by ultrasonication. Finally, the reaction solution was centrifuged at 3500 rpm for 1 hour, and the supernatant was collected and freeze-dried to obtain MXene for later use. (2) Preparation of micelle solutions A gelatin aqueous solution of a certain mass concentration was mixed with a certain mass of MXene and ultrasonically dispersed for 30 min. Then, 0.59 g of sodium dodecyl sulfate, 0.42 g of NaCl, and 100 µL of octadecyl methacrylate were added, and the mixture was stirred at 50 °C for 60 min to prepare a micelle solution for later use. (3) Preparation of gelatin / polyacrylamide / MXene hydrogel Acrylamide was added to the solution prepared in step (2), and stirring was continued for 30 min. After cooling, ammonium persulfate, N,N'-methylenebisacrylamide, and N,N,N',N'-tetramethylethylenediamine were added. Finally, the solution was transferred to a mold and gelled at room temperature.

[0022] Further, the mass of LiF in step (1) is 1 g.

[0023] Further, the volume of hydrochloric acid in step (1) is 20 mL.

[0024] Further, the concentration of hydrochloric acid in step (1) is 12 M.

[0025] Further, the mass percentage concentration of the gelatin aqueous solution in step (2) is 3-12 wt%.

[0026] Further, the volume of the gelatin aqueous solution in step (2) is 10 mL.

[0027] Furthermore, the final concentration of MXene added in step (2) is 0-3 mg / mL.

[0028] Further, the mass of the acrylamide in step (3) is 1.5 g.

[0029] Further, the mass of ammonium persulfate in step (3) is 0.03 g.

[0030] Further, the mass of the N,N'-methylenebisacrylamide in step (3) is 1.5 mg.

[0031] Further, the amount of N,N,N',N'-tetramethylethylenediamine used in step (3) is 20 µL.

[0032] To make the above-mentioned features and advantages of the present invention more apparent and understandable, specific embodiments are described below in detail. Unless otherwise specified, the methods of the present invention are conventional methods in the art.

[0033] Example 1 Step 1: Preparation of MXene materials 1 g LiF was dissolved in 20 mL of 12 M hydrochloric acid solution. Then, 1 g Ti3AlC2 powder was slowly added to the solution, and the mixture was stirred at 35 °C for 24 h. The mixture was then centrifuged with deionized water (3500 rpm, 5 min), and repeatedly washed until the pH of the supernatant was greater than 6. The precipitate was then ultrasonically removed (60 min). Finally, the reaction solution was centrifuged at 3500 rpm for 1 h, and the supernatant was collected and freeze-dried to obtain MXene for later use.

[0034] Step 2: Preparation of micelle solution Add MXene to a final concentration of 2 mg / mL to 10 mL of a 6 wt% gelatin aqueous solution and sonicate for 30 min. Then add 0.59 g sodium dodecyl sulfate, 0.42 g NaCl, and 100 µL octadecyl methacrylate, and stir at 50 °C for 60 min to prepare a micelle solution for later use.

[0035] Step 3: Preparation of gelatin / polyacrylamide / MXene hydrogel Add 1.5 g of acrylamide to the micelle solution and continue stirring for 30 min. After cooling, add 0.03 g of ammonium persulfate, 1.5 mg of N,N'-methylenebisacrylamide, and 20 µL of N,N,N',N'-tetramethylethylenediamine. Finally, transfer the solution to a mold and allow it to gel at room temperature.

[0036] Please see Figure 1 , Figure 1 This is a schematic diagram illustrating the fabrication process of the high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association, as described in this invention. Figure 1 As shown, gelatin / polyacrylamide / MXene hydrogels were obtained by introducing micelles inside the hydrogel and using a hydrophobic association method followed by thermally initiated polymerization.

[0037] Please see Figure 2 , Figure 2 This is a scanning electron microscope (SEM) image of the high-performance hydrogel wearable sensor based on hydrophobic association, which synergistically enhances toughness and conductivity. The hydrogel surface exhibits a wrinkled morphology, with MXene nanosheets tightly attached to the hydrogel, demonstrating a compact structure.

[0038] Please see Figure 3 , Figure 3 This is the elemental distribution energy spectrum of the high-performance hydrogel wearable sensor based on hydrophobic association, which synergistically enhances toughness and conductivity. It demonstrates the successful synthesis of the gelatin / polyacrylamide / MXene hydrogel and the uniform distribution of MXene within the hydrogel.

[0039] Please see Figure 4 , Figure 4 This is an optical image of the high-performance hydrogel wearable sensor of the present invention, which features synergistic enhancement of toughness and conductivity based on hydrophobic association. Figure 4 As shown, this hydrophobic associative hydrogel exhibits excellent extensibility.

[0040] Please see Figure 5 , Figure 5 This is a mechanical property test diagram of the high-performance hydrogel wearable sensor based on hydrophobic association, which synergistically enhances toughness and conductivity (based on Example 1, only the gelatin concentration was changed). Figure 5 As shown, this hydrophobic associative hydrogel exhibits excellent mechanical tensile properties. The interaction between the PAAm network and the gelatin network is most pronounced when the MXene content is 2 mg / mL and the gelatin concentration is 6 wt%, demonstrating enhanced hydrogel mechanical properties.

[0041] Please see Figure 6 , Figure 6This is the sensing sensitivity curve of the high-performance hydrogel wearable sensor based on hydrophobic association and synergistic enhancement of toughness and conductivity according to the present invention (only the final concentration of MXene added was changed based on Example 1). Figure 6 As shown, when the gelatin concentration is 6 wt%, the addition of different amounts of MXene showed different sensing sensitivities. When the MXene concentration was 2 mg / mL, the sensitivity curve had the largest slope, indicating the optimal sensing sensitivity.

[0042] Please see Figure 7 , Figure 7 This invention presents a strain sensing attempt for a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association. For example... Figure 7 As shown, the gelatin / polyacrylamide / MXene hydrogel sensor has a wide strain sensing range.

[0043] Example 2 This embodiment prepares a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association according to the following steps: Step 1: Preparation of MXene materials 1 g LiF was dissolved in 20 mL of 12 M hydrochloric acid solution. Then, 1 g Ti3AlC2 powder was slowly added to the solution, and the mixture was stirred at 35 °C for 24 h. The mixture was then centrifuged with deionized water (3500 rpm, 5 min), and repeatedly washed until the pH of the supernatant was greater than 6. The precipitate was then ultrasonically removed (60 min). Finally, the reaction solution was centrifuged at 3500 rpm for 1 h, and the supernatant was collected and freeze-dried to obtain MXene for later use.

[0044] Step 2: Preparation of micelle solution Add MXene to a final concentration of 1 mg / mL to 10 mL of a 3 wt% gelatin aqueous solution and sonicate for 30 min. Then add 0.59 g sodium dodecyl sulfate, 0.42 g NaCl, and 100 µL octadecyl methacrylate, and stir at 50 °C for 60 min.

[0045] Step 3: Preparation of gelatin / polyacrylamide / MXene hydrogel Add 1.5 g of acrylamide to the above micelle solution and continue stirring for 30 min. After cooling, add 0.03 g of ammonium persulfate, 1.5 mg of N,N'-methylenebisacrylamide, and 20 µL of N,N,N',N'-tetramethylethylenediamine. Finally, transfer the solution to a mold and allow it to gel at room temperature.

[0046] Example 3 This embodiment prepares a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association according to the following steps: Step 1: Preparation of MXene materials 1 g LiF was dissolved in 20 mL of 12 M hydrochloric acid solution. Then, 1 g Ti3AlC2 powder was slowly added to the solution, and the mixture was stirred at 35 °C for 24 h. The mixture was then centrifuged with deionized water (3500 rpm, 5 min), and repeatedly washed until the pH of the supernatant was greater than 6. The precipitate was then ultrasonically removed (60 min). Finally, the reaction solution was centrifuged at 3500 rpm for 1 h, and the supernatant was collected and freeze-dried to obtain MXene for later use.

[0047] Step 2: Preparation of micelle solution Add MXene to a final concentration of 1 mg / mL to 10 mL of a 6 wt% gelatin aqueous solution and sonicate for 30 min. Then add 0.59 g sodium dodecyl sulfate, 0.42 g NaCl, and 100 µL octadecyl methacrylate, and stir at 50 °C for 60 min.

[0048] Step 3: Preparation of gelatin / polyacrylamide / MXene hydrogel Add 1.5 g of acrylamide to the above micelle solution and continue stirring for 30 min. After cooling, add 0.03 g of ammonium persulfate, 1.5 mg of N,N'-methylenebisacrylamide, and 20 µL of N,N,N',N'-tetramethylethylenediamine. Finally, transfer the solution to a mold and allow it to gel at room temperature.

[0049] Example 4 This embodiment prepares a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association according to the following steps: Step 1: Preparation of MXene materials 1 g LiF was dissolved in 20 mL of 12 M hydrochloric acid solution. Then, 1 g Ti3AlC2 powder was slowly added to the solution, and the mixture was stirred at 35 °C for 24 h. The mixture was then centrifuged with deionized water (3500 rpm, 5 min), and repeatedly washed until the pH of the supernatant was greater than 6. The precipitate was then ultrasonically removed (60 min). Finally, the reaction solution was centrifuged at 3500 rpm for 1 h, and the supernatant was collected and freeze-dried to obtain MXene for later use.

[0050] Step 2: Preparation of micelle solution Add MXene to a final concentration of 2 mg / mL to 10 mL of a 9 wt% gelatin aqueous solution and sonicate for 30 min. Then add 0.59 g sodium dodecyl sulfate, 0.42 g NaCl, and 100 µL octadecyl methacrylate, and stir at 50 °C for 60 min.

[0051] Step 3: Preparation of gelatin / polyacrylamide / MXene hydrogel Add 1.5 g of acrylamide to the above micelle solution and continue stirring for 30 min. After cooling, add 0.03 g of ammonium persulfate, 1.5 mg of N,N'-methylenebisacrylamide, and 20 µL of N,N,N',N'-tetramethylethylenediamine. Finally, transfer the solution to a mold and allow it to gel at room temperature.

[0052] Example 5 This embodiment prepares a high-performance hydrogel wearable sensor based on the synergistic enhancement of toughness and conductivity through hydrophobic association according to the following steps. Step 1: Preparation of MXene materials 1 g LiF was dissolved in 20 mL of 12 M hydrochloric acid solution. Then, 1 g Ti3AlC2 powder was slowly added to the solution, and the mixture was stirred at 35 °C for 24 h. The mixture was then centrifuged with deionized water (3500 rpm, 5 min), and repeatedly washed until the pH of the supernatant was greater than 6. The precipitate was then ultrasonically removed (60 min). Finally, the reaction solution was centrifuged at 3500 rpm for 1 h, and the supernatant was collected and freeze-dried to obtain MXene for later use.

[0053] Step 2: Preparation of micelle solution Add MXene to a final concentration of 3 mg / mL to 10 mL of a 6 wt% gelatin aqueous solution and sonicate for 30 min. Then add 0.59 g sodium dodecyl sulfate, 0.42 g NaCl, and 100 µL octadecyl methacrylate and stir at 50 °C for 60 min.

[0054] Step 3: Preparation of gelatin / polyacrylamide / MXene hydrogel Add 1.5 g of acrylamide to the above micelle solution and continue stirring for 30 min. After cooling, add 0.03 g of ammonium persulfate, 1.5 mg of N,N'-methylenebisacrylamide, and 20 µL of N,N,N',N'-tetramethylethylenediamine. Finally, transfer the solution to a mold and allow it to gel at room temperature.

[0055] The high-performance hydrogel wearable sensor prepared by this invention has high toughness, high conductivity, and a wide strain monitoring range, and is expected to be widely used in fields such as personal health and medical monitoring, intelligent sports equipment, rehabilitation management, and human-computer interaction interfaces.

[0056] In the five embodiments above, a hydrogel strain sensor with synergistically enhanced toughness and conductivity was constructed using a hydrophobic association method, exhibiting excellent strain monitoring capabilities. Please refer to [link to relevant documentation]. Figure 7 , Figure 7 This is a strain sensing monitoring diagram of the wearable hydrogel sensor based on hydrophobic association, which synergistically enhances toughness and conductivity. (See diagram below.) Figure 7 As shown, this gelatin / polyacrylamide / MXene hydrogel wearable sensor can sensitively and stably monitor strains of different magnitudes.

[0057] In summary, this invention discloses a method for fabricating a high-performance hydrogel wearable sensor based on hydrophobic association that synergistically enhances toughness and conductivity. Building upon existing technologies, this method employs hydrophobic association to construct a gelatin / polyacrylamide / MXene hydrogel, resulting in a hydrogel wearable sensor with synergistically enhanced toughness and conductivity. The reaction conditions are mild, the process is simple and easy to operate, and the sensor exhibits excellent mechanical properties, high sensing sensitivity, and a wide operating pressure window.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for preparing a high-performance hydrogel wearable sensor based on synergistic enhancement of hydrophobic association toughness and electrical conductivity, characterized in that, The method comprises the following steps: (1) in-situ etching of titanium aluminum carbide by hydrogen fluoride formed by lithium fluoride and hydrochloric acid to prepare MXene; (2) mixing a gelatin aqueous solution with a certain mass concentration and a certain mass of MXene, then adding sodium dodecyl sulfate, NaCl and octadecyl methacrylate to prepare a micellar solution; (3) adding acrylamide to the solution prepared in step (2), after stirring and cooling, adding ammonium persulfate, N,N'-methylene bisacrylamide and N,N,N',N'-tetramethyl ethylenediamine; finally, transferring the solution to a mold and performing a gelation reaction at room temperature.

2. The method of claim 1, wherein the hydrophobically associating based, toughness and conductivity synergistically enhanced, high performance hydrogel wearable sensor is prepared by the steps of: a) mixing the hydrogel precursor solution with the conductive filler to form a mixture; b) coating the mixture on a substrate to form a coating layer; c) drying the coating layer to form a dried coating layer; d) coating the dried coating layer with a top layer; and e) drying the top layer to form the hydrogel wearable sensor. The mass of the lithium fluoride is 1 g.

3. The method of preparing hydrophobically associative based, synergistically enhanced toughness and conductivity, high performance hydrogel wearable sensor according to claim 1, characterized in that: The volume of the hydrochloric acid is 20 mL.

4. The method of preparing hydrophobic association based, synergistically enhanced toughness and conductivity, high performance hydrogel wearable sensor according to claim 1, characterized in that: The concentration of the hydrochloric acid is 12 M.

5. The method for fabricating a high-performance hydrogel wearable sensor based on hydrophobic association and synergistic enhancement of toughness and conductivity according to claim 1, characterized in that: The mass percentage concentration of the gelatin aqueous solution in step (2) is 3-12 wt%.

6. The method for fabricating a high-performance hydrogel wearable sensor based on hydrophobic association and synergistic enhancement of toughness and conductivity according to claim 1, characterized in that: The final concentration of MXene added in step (2) is 0.1-3 mg / mL.

7. The method of preparing hydrophobic association based, synergistically enhanced toughness and conductivity, high performance hydrogel wearable sensor according to claim 1, characterized in that: The mass of acrylamide in step (3) is 1.5 g.

8. The method of preparing hydrophobic association based, synergistically enhanced toughness and conductivity, high performance hydrogel wearable sensor according to claim 1, characterized in that: The mass of ammonium persulfate in step (3) is 0.03 g.

9. The method of preparing hydrophobic association based, synergistically enhanced toughness and conductivity, high performance hydrogel wearable sensor according to claim 1, characterized in that: The mass of N,N'-methylene bisacrylamide in step (3) is 1.5 mg.

10. The method of claim 1, wherein the method of preparing a hydrophobic association based, toughness and conductivity synergistically enhanced, high performance hydrogel wearable sensor is characterized by: The amount of N,N,N',N'-tetramethyl ethylenediamine in step (3) is 20 µL.

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