High-strength tear-resistant conductive hydrogel suitable for triboelectric nanogenerators and its preparation and application

Abstract

The present invention discloses a high-strength, tear-resistant conductive hydrogel, its preparation method, and its application in triboelectric nanogenerators. The preparation method comprises: adding hydroxyethyl methacrylate, soluble starch, a crosslinker, an initiator, and a super accelerator to an organic solvent, stirring until completely dissolved to obtain a gel prepolymer, and allowing the mixture to stand to obtain an organogel; placing the organogel in an electrolyte solution, and performing solvent replacement to obtain a high-strength, tear-resistant conductive hydrogel suitable for triboelectric nanogenerators. The high-strength, tear-resistant conductive hydrogel obtained by the present invention has excellent mechanical properties and electrical conductivity, improves resistance to external damage, and effectively extends the service life of triboelectric nanogenerators, which is of great significance for promoting the development of triboelectric nanogenerators.

Description

Technical Field

[0001] The present invention relates to the technical field of conductive hydrogels, and in particular to a high-strength, tear-resistant conductive hydrogel suitable for a triboelectric nanogenerator, and its preparation and application. Background Art

[0002] Triboelectric nanogenerators (TENGs) have the advantages of simple structure, low manufacturing cost, high output voltage, and high energy conversion efficiency, and have good application prospects in the era of the Internet of Things. The performance of triboelectric nanogenerators is mainly determined by their friction materials and electrode materials. According to the existence state of the electrode materials, they can be divided into solid metal, solid inorganic, and flexible electrode materials. Due to their rigid structure, solid electrode materials are prone to breakage when subjected to external forces. During long-term use, they are prone to irreversible deformation, causing device damage, creating safety hazards, and affecting their output performance. Flexible electrode materials have good mechanical properties and can still work normally under various complex conditions such as stretching, bending, folding, and pressing. Therefore, they have unique advantages in flexible and stretchable triboelectric nanogenerators and large deformation self-powered applications.

[0003] In recent years, hydrogel materials, as a new type of widely used material, have attracted widespread attention from researchers. As a three-dimensional material containing a large amount of water, hydrogels have excellent stretchability, flexibility, and biocompatibility. Incorporating conductive fillers (conductive ions, carbon nanotubes, silver nanowires, graphene, etc.) into hydrogels can give them conductive properties; designing the molecular chains or macrostructure of hydrogels can give them excellent properties such as shape memory, self-healing, high mechanical strength, and antifreeze. Therefore, hydrogels can be used as electrode materials for triboelectric nanogenerators. For example, patent CN109369928B discloses a polyvinyl alcohol / sodium alginate hydrogel for a single-electrode triboelectric nanogenerator and its preparation method. The single-motor triboelectric nanogenerator prepared based on polyvinyl alcohol / sodium alginate hydrogel and polydimethylsiloxane film has the advantages of good transparency and flexibility, and can be used in the field of nano-new energy.

[0004] However, traditional hydrogel materials generally have the problem of poor mechanical strength. Existing hydrogel-based friction nanogenerators also face the dilemma of being easily damaged by physical damage and having a short safe service life. Self-healing hydrogel materials provide ideas for extending the service life of friction nanogenerators. Patent CN201610346223.2 discloses a method for preparing a self-healing hydrogel electrode, which is expected to be applied to modern clinical testing and biomedical measurements. Patent CN108586829B discloses a self-healing conductive hydrogel that can be used on the surface or inside of a biological body and its preparation method, which can be used for biological electrodes, sensors, circuits, etc. However, in actual operation, self-healing hydrogel-based friction nanogenerators still have problems such as insufficient mechanical strength, difficulty in accurately docking the cross-section, long repair time, and performance degradation after repair. How to improve the service life of hydrogel-based friction nanogenerators remains a major challenge facing research in this field.

[0005] In fact, the poor mechanical properties of hydrogel materials are the main reason for the short physical lifespan of hydrogel-based triboelectric nanogenerators. Therefore, if the mechanical strength of the hydrogel material itself can be effectively improved and its ability to resist external damage can be enhanced, it will be beneficial to fundamentally extend the safe service life of the device. Summary of the Invention

[0006] In response to the above-mentioned technical problems and the shortcomings in the field, the present invention provides a method for preparing a high-strength, tear-resistant conductive hydrogel suitable for a friction nanogenerator. First, the polymerization system is dissolved in an organic solvent under stirring conditions, and the organic gel is obtained by standing. Then, the organic solvent is replaced with an electrolyte solution by solvent replacement, thereby preparing a high-strength, tear-resistant conductive hydrogel suitable for a friction nanogenerator.

[0007] A method for preparing a high-strength, tear-resistant conductive hydrogel suitable for a triboelectric nanogenerator comprises the following steps:

[0008] (1) adding hydroxyethyl methacrylate, soluble starch, a crosslinking agent, an initiator, and a super accelerator to an organic solvent, stirring until completely dissolved to obtain a gel prepolymer solution, and allowing to stand to obtain an organogel;

[0009] The soluble starch is insoluble in cold water and has a solubility of less than 3 g in boiling water;

[0010] (2) placing the organic gel in an electrolyte solution, and obtaining the high-strength tear-resistant conductive hydrogel suitable for a triboelectric nanogenerator through solvent replacement;

[0011] In the electrolyte solution, the electrolyte is sodium citrate, and the electrolyte concentration is 0.6-1.5M.

[0012] In the preparation method of the present invention, the solubility of the soluble starch in water is low, but the solubility in the organic solvent is high.

[0013] The preparation method of the present invention is simple, highly controllable and widely adaptable. The hydrogel prepared by the solvent replacement strategy has high mechanical strength, with a maximum tensile modulus reaching the MPa level. The mechanical properties of the gel without solvent replacement are improved by dozens of times, and the mechanical properties of the gel replaced by deionized water are improved by hundreds of times. The sodium citrate solution is rich in a large number of free ions, which enter the polymer system during the solvent replacement process, so that the high-strength tear-resistant conductive hydrogel has good electrical properties and can be used as an electrode material for friction nanogenerators. Compared with traditional hydrogel-based friction nanogenerators, this method starts from improving the mechanical strength of the hydrogel, effectively improving the service life of the friction nanogenerator.

[0014] In the preparation method of the present invention, the concentration of the electrolyte solution affects not only the mechanical strength of the hydrogel but also its ionic conductivity.

[0015] In the preparation method of the present invention, the amount of polymer components added will affect the properties of the final hydrogel, especially its mechanical properties. For example, too low a content of monomers (hydroxyethyl methacrylate, soluble starch) or cross-linking agents will reduce the mechanical strength of the hydrogel and even cause it to fail to gel.

[0016] In a preferred embodiment, in step (1), based on the total mass of hydroxyethyl methacrylate, soluble starch, crosslinking agent, initiator, super accelerator and organic solvent being 100%, the mass proportion of hydroxyethyl methacrylate is 15% to 25%, and the mass proportion of soluble starch is 4% to 15%.

[0017] In a preferred embodiment, in step (1), the amount of the cross-linking agent added is 0.50% to 3.50% of the sum of the mass of hydroxyethyl methacrylate and soluble starch.

[0018] In a preferred embodiment, in step (1), the cross-linking agent is N,N'-methylenebisacrylcystamine.

[0019] In the preparation method of the present invention, the initiator corresponds to the reaction time, and too low an initiator content will prolong the required reaction time.

[0020] In a preferred embodiment, in step (1), the amount of the initiator added is 1% to 4% of the sum of the mass of hydroxyethyl methacrylate and soluble starch.

[0021] In a preferred embodiment, in step (1), the initiator is ammonium persulfate.

[0022] In a preferred embodiment, in step (1), the amount of super accelerator added is 3.0% to 4.50% of the sum of the mass of hydroxyethyl methacrylate and soluble starch.

[0023] In a preferred embodiment, in step (1), the super accelerator is N,N,N',N'-tetramethylethylenediamine.

[0024] In a preferred embodiment, in step (1), the organic solvent is dimethyl sulfoxide.

[0025] The present invention also provides a high-strength tear-resistant conductive hydrogel suitable for a friction nanogenerator, which is prepared by the preparation method.

[0026] The present invention utilizes a solvent replacement strategy to replace the organic solvent (such as dimethyl sulfoxide) in the organogel with an electrolyte solution, thereby producing a high-strength, tear-resistant conductive hydrogel. During the solvent replacement process, the addition of the electrolyte solution entangles the starch polymer network, forming a cross-linked spatial network that enhances the hydrogel's mechanical properties. Furthermore, the introduction of the electrolyte solution allows a large number of free ions to enter the hydrogel's spatial network, improving the hydrogel's conductivity and enabling its use in triboelectric nanogenerators.

[0027] The tensile modulus of the high-strength tear-resistant conductive hydrogel of the present invention is not less than 0.4 MPa, the compression modulus is not less than 0.5 MPa, and the fracture energy is not less than 4.20 kJ / m 2 , the ionic conductivity is not less than 1.7mS / cm.

[0028] The present invention also provides the use of the high-strength tear-resistant conductive hydrogel in a friction nanogenerator.

[0029] In a preferred example, the high-strength tear-resistant conductive hydrogel is used as a flexible electrode material for a friction nanogenerator.

[0030] The high-strength tear-resistant conductive hydrogel obtained by the present invention has good mechanical properties and conductivity, can improve the ability to resist external damage, effectively extend the service life of the friction nanogenerator, and is of great significance to promoting the development of friction nanogenerators.

[0031] Compared with the prior art, the present invention has the following significant technical effects:

[0032] 1) Compared with solid metal electrode materials and solid inorganic electrode materials, the high-strength tear-resistant conductive hydrogel prepared by the present invention has good flexibility and can be stretched up to 400%. It has stable electrical output performance under stretching, twisting, continuous beating, and extreme deformation, which broadens the scope of use of friction nanogenerators while effectively improving their safety performance.

[0033] 2) Compared with traditional hydrogel-based triboelectric nanogenerators, the high-strength, tear-resistant conductive hydrogel prepared by the present invention has enhanced mechanical properties due to the curling of the polymer network in the electrolyte solution, and has a certain degree of tear resistance, which avoids the destruction of the triboelectric nanogenerator structure under the action of external forces and extends the service life of the triboelectric nanogenerator.

[0034] 3) The tensile modulus of the high-strength tear-resistant conductive hydrogel for triboelectric nanogenerator obtained in the present invention is not less than 0.4 MPa, the compression modulus is not less than 0.5 MPa, and the fracture energy is not less than 4.20 kJ / m 2 , the mechanical properties and tear resistance are better than most of the hydrogels currently reported for friction nanogenerators.

[0035] 4) The ionic conductivity of the high-strength tear-resistant conductive hydrogel for the triboelectric nanogenerator obtained in the present invention is not less than 1.7 mS / cm. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a scanning electron microscope photograph of the high-strength tear-resistant conductive hydrogel of Example 1;

[0037] Figure 2 This is a tensile curve diagram of the high-strength tear-resistant conductive hydrogel of Example 1;

[0038] Figure 3 This is a compression curve diagram of the high-strength tear-resistant conductive hydrogel of Example 1;

[0039] Figure 4 This is the impedance diagram of the high-strength tear-resistant conductive hydrogel of Example 1;

[0040] Figure 5 This is the fracture energy curve of the high-strength tear-resistant conductive hydrogel of Example 2;

[0041] Figure 6 This is an open circuit voltage curve of the high-strength tear-resistant conductive hydrogel of Example 2 when used as a triboelectric nanogenerator;

[0042] Figure 7 This is a short-circuit current curve of the high-strength tear-resistant conductive hydrogel of Example 2 when used as a triboelectric nanogenerator;

[0043] Figure 8 This is a curve diagram of the transferred charge when the high-strength tear-resistant conductive hydrogel of Example 2 is used as a triboelectric nanogenerator;

[0044] Figure 9 The open circuit voltage of the high-strength tear-resistant conductive hydrogel used as a triboelectric nanogenerator under different stretching degrees in Example 2;

[0045] Figure 10 The open circuit voltage of the high-strength tear-resistant conductive hydrogel used as a friction nanogenerator in Example 2 at different beating frequencies. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are intended to illustrate the present invention and are not intended to limit the scope of the invention. The operating methods in the following examples where no specific conditions are specified are generally performed under conventional conditions or as recommended by the manufacturer.

[0047] Example 1

[0048] 0.3 g of soluble starch was added to 3.7 mL of dimethyl sulfoxide, along with 1 mL of hydroxyethyl methacrylate, 0.033 g of ammonium persulfate, 0.050 g of N,N'-methylenebisacryloylcystamine, and 50 μL of N,N,N',N'-tetramethylethylenediamine. The mixture was stirred until completely dissolved, yielding a uniform, transparent gel prepolymer. The prepolymer was then injected into a pair of glass slides containing a silicone mold and allowed to react at room temperature for 24 hours to produce an organo-oil gel. The organo-gel was then placed in a 1 M sodium citrate solution for solvent replacement, yielding a high-strength, tear-resistant conductive hydrogel.

[0049] like Figure 1 As shown, after freeze-drying, the high-strength tear-resistant conductive hydrogel sample of this embodiment has a dense polymer network and a uniform pore size distribution in the scanning electron microscope image.

[0050] Figure 2 The figure shows the tensile curve of the high-strength tear-resistant conductive hydrogel sample. The sample is a rectangle with a width of 1.0 cm and a length of 3.0 cm. Through calculation, it can be seen that the tensile modulus of the sample in this embodiment is 0.57 MPa, showing good mechanical properties.

[0051] Figure 3 The figure shows the compression curve of a high-strength tear-resistant conductive hydrogel sample. The sample is a cylinder with a diameter of 0.8 cm and a height of 0.9 cm. Through calculation, it can be seen that the compression modulus of the sample in this example is 0.80 MPa, which is much higher than the mechanical strength of the hydrogel without solvent replacement. The fracture energy is 6.25 kJ / m 2 . Figure 4 This is the impedance diagram of a high-strength tear-resistant conductive hydrogel sample. The sample is a cylinder with a diameter of 0.8 cm and a height of 0.3 cm. The ionic conductivity of the conductive hydrogel measured by the AC impedance method is 6.02 mS / cm, showing good conductive properties.

[0052] Example 2

[0053] 0.4 g of soluble starch was added to 3.6 mL of dimethyl sulfoxide, followed by 1 mL of hydroxyethyl methacrylate, 0.033 g of ammonium persulfate, 0.050 g of N,N'-methylenebisacryloylcystamine, and 50 μL of N,N,N',N'-tetramethylethylenediamine. The mixture was stirred until completely dissolved to obtain a uniform, transparent gel prepolymer. The prepolymer was then injected into a pair of glass slides containing a silicone mold and allowed to react at room temperature for 24 hours to produce an organo-oil gel. The organo-gel was then placed in a 1 M sodium citrate solution for solvent exchange, resulting in a high-strength, tear-resistant conductive hydrogel. The resulting gel exhibited a tensile modulus of 0.67 MPa, a compressive modulus of 0.95 MPa, and an ionic conductivity of 5.53 mS / cm.

[0054] like Figure 5 As shown, the high-strength tear-resistant conductive hydrogel of this embodiment has a certain tear resistance, and the fracture energy is 7.45kJ / m 2 When used as an electrode material for a friction nanogenerator, it can effectively resist external physical damage and extend the service life of the friction nanogenerator.

[0055] like Figure 6 、 Figure 7 、 Figure 8 As shown, the high-strength, tear-resistant conductive hydrogel of this embodiment can be used as an electrode material for a triboelectric nanogenerator. The hydrogel-based triboelectric nanogenerator exhibits certain output performance: an open-circuit voltage output of 75V, a short-circuit current output of 0.58μA, and a transferred charge of -23nC. Compared to solid-state electrodes, the high-strength, tear-resistant conductive hydrogel triboelectric nanogenerator has better flexibility and stretchability, and can be applied in the field of wearable motion detection.

[0056] like Figure 9 As shown, the high-strength tear-resistant conductive hydrogel of this embodiment was used as a triboelectric nanogenerator and tested at different stretching degrees. Under different stretching degrees, the triboelectric nanogenerator has obvious differentiation.

[0057] like Figure 10 As shown in the figure, the high-strength tear-resistant conductive hydrogel of this embodiment is used as a triboelectric nanogenerator and tested at different tapping frequencies. Under different tapping frequencies, the triboelectric nanogenerator has obvious differentiation.

[0058] Example 3

[0059] Add 0.2g of soluble starch to 3.8mL of dimethyl sulfoxide, add 1mL of hydroxyethyl methacrylate, 0.033g of ammonium persulfate, 0.050g of N,N'-methylenebisacryloylcystamine, and 50μL of N,N,N',N'-tetramethylethylenediamine, and stir until completely dissolved to obtain a uniform and transparent gel prepolymer. The prepolymer was injected into a pair of glass slides containing a silicone mold and reacted at room temperature for 24h to obtain an organic oil gel. The organic oil gel was placed in a 1M sodium citrate solution for solvent replacement to obtain a high-strength tear-resistant conductive hydrogel. The tensile modulus of the obtained gel was 0.42MPa, the compression modulus was 0.52MPa, and the fracture energy was 5.54kJ / m 2 , the ionic conductivity is 3.61mS / cm.

[0060] Example 4

[0061] Add 0.5g of soluble starch to 3.5mL of dimethyl sulfoxide, add 1mL of hydroxyethyl methacrylate, 0.033g of ammonium persulfate, 0.050g of N,N'-methylenebisacryloylcystamine, and 50μL of N,N,N',N'-tetramethylethylenediamine, and stir until completely dissolved to obtain a uniform and transparent gel prepolymer. The prepolymer was injected into a pair of glass slides containing a silicone mold and reacted at room temperature for 24h to obtain an organic oil gel. The organic oil gel was placed in a 1M sodium citrate solution for solvent replacement to obtain a high-strength tear-resistant conductive hydrogel. The tensile modulus of the obtained gel was 0.80MPa, the compression modulus was 1.38MPa, and the fracture energy was 9.00kJ / m 2 , the ionic conductivity is 1.78mS / cm.

[0062] Comparative Example 1: Low concentration electrolyte solution replacement system leads to insufficient mechanical properties

[0063] Add 0.5g of soluble starch to 3.5mL of dimethyl sulfoxide, add 1mL of hydroxyethyl methacrylate, 0.033g of ammonium persulfate, 0.050g of N,N'-methylenebisacryloylcystamine, and 50μL of N,N,N',N'-tetramethylethylenediamine, and stir until completely dissolved to obtain a uniform and transparent gel prepolymer. The prepolymer was injected into a pair of glass slides containing a silicone mold and reacted at room temperature for 24h to obtain an organic oil gel. The organic oil gel was placed in a 0.5M sodium citrate solution for solvent replacement. The tensile modulus of the obtained gel was 0.20MPa, the compression modulus was 0.24MPa, and the fracture energy was 1.51kJ / m 2 , the ionic conductivity is 1.47mS / cm.

[0064] Comparative Example 2: High-concentration electrolyte solution replacement system, mechanical properties decreased, conductivity weakened

[0065] Add 0.5g of soluble starch to 3.5mL of dimethyl sulfoxide, add 1mL of hydroxyethyl methacrylate, 0.033g of ammonium persulfate, 0.050g of N,N'-methylenebisacryloylcystamine, and 50μL of N,N,N',N'-tetramethylethylenediamine, and stir until completely dissolved to obtain a uniform and transparent gel prepolymer. The prepolymer was injected into a pair of glass slides containing a silicone mold and reacted at room temperature for 24h to obtain an organic oil gel. The organic oil gel was placed in a 1.7M sodium citrate solution for solvent replacement. The tensile modulus of the obtained gel was 0.30MPa, the compression modulus was 0.42MPa, and the fracture energy was 2.78kJ / m 2 The high concentration of electrolyte solution enhances the electrostatic interaction between anions and cations, restricting ion mobility and reducing the conductivity of the hydrogel. The ionic conductivity is 0.25mS / cm, and the performance of the triboelectric nanogenerator is poor.

[0066] Comparative Example 3 Water Replacement System

[0067] Add 0.5g of soluble starch to 3.5mL of dimethyl sulfoxide, add 1mL of hydroxyethyl methacrylate, 0.033g of ammonium persulfate, 0.050g of N,N'-methylenebisacryloylcystamine, and 50μL of N,N,N',N'-tetramethylethylenediamine, and stir until completely dissolved to obtain a uniform and transparent gel prepolymer. The prepolymer was injected into a pair of glass slides containing a silicone mold and reacted at room temperature for 24h to obtain an organic oil gel. The organic oil gel was placed in deionized water for solvent replacement. Due to the water absorption and expansion of the gel, the tensile modulus was 0.07MPa, the compression modulus was 0.08MPa, and the fracture energy was 1.24kJ / m 2 , the ionic conductivity is 0.01mS / cm, which cannot be used for friction nanogenerators.

[0068] Comparative Example 4 Sodium Phytate Replacement System

[0069] Add 0.4g of soluble starch to 3.6mL of dimethyl sulfoxide, add 1mL of hydroxyethyl methacrylate, 0.033g of ammonium persulfate, 0.050g of N,N'-methylenebisacryloylcystamine, and 50μL of N,N,N',N'-tetramethylethylenediamine, and stir until completely dissolved to obtain a uniform and transparent gel prepolymer. The prepolymer was injected into a pair of glass slides containing a silicone mold and reacted at room temperature for 24 hours to obtain an organic oil gel. The organic oil gel was placed in a saturated sodium phytate solution for solvent replacement to obtain a hydrogel. Since the polymer network has a high solubility in sodium phytate solution, the degree of entanglement of the polymer network is reduced and the crosslinking density of the hydrogel is reduced. The tensile modulus of the obtained gel is 0.11MPa, the compression modulus is 0.14MPa, and the fracture energy is 1.23kJ / m 2 , the ionic conductivity is 1.57mS / cm.

[0070] Comparative Example 5: Soluble starch replaced with water-soluble starch, sodium phytate replacement system

[0071] 0.5g of water-soluble starch (water-soluble starch is soluble in cold water and has a solubility greater than 60g in cold water) is added to 3.5mL of dimethyl sulfoxide, and 1mL of hydroxyethyl methacrylate, 0.033g of ammonium persulfate, 0.050g of N,N'-methylenebisacryloylcystamine, and 50μL of N,N,N',N'-tetramethylethylenediamine are added and stirred until completely dissolved to obtain a uniform and transparent gel prepolymer. The prepolymer is injected into a pair of glass slides containing a silicone mold and reacted at room temperature for 24 hours to obtain an organic oil gel. The organic oil gel is placed in a saturated sodium phytate solution for solvent replacement to obtain a hydrogel. Since the solubility of water-soluble starch in organic solvents is low, the tensile modulus of the obtained gel is 0.067MPa, the compression modulus is 0.09MPa, and the fracture energy is 3.98kJ / m 2 , the ionic conductivity is 1.65mS / cm.

[0072] In addition, it should be understood that after reading the above description of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A method for preparing a high-strength tear-resistant conductive hydrogel suitable for a triboelectric nanogenerator, characterized in that: Including steps: (1) Adding hydroxyethyl methacrylate, soluble starch, a crosslinking agent, an initiator, and a super accelerator to an organic solvent, stirring until completely dissolved to obtain a gel prepolymer solution, and allowing to stand to obtain an organogel; The soluble starch is insoluble in cold water and has a solubility of less than 3 g in boiling water; Based on the total mass of hydroxyethyl methacrylate, soluble starch, crosslinking agent, initiator, super accelerator and organic solvent being 100%, the mass proportion of hydroxyethyl methacrylate is 15% to 25%, and the mass proportion of soluble starch is 4% to 15%; The amount of cross-linking agent added is 0.50% to 3.50% of the sum of the mass of hydroxyethyl methacrylate and soluble starch; the cross-linking agent is N,N'-methylenebisacryloylcystamine; The amount of super accelerator added is 3.0% to 4.50% of the sum of the mass of hydroxyethyl methacrylate and soluble starch; the super accelerator is N,N,N',N'-tetramethylethylenediamine; (2) placing the organic gel in an electrolyte solution, and obtaining the high-strength tear-resistant conductive hydrogel suitable for a triboelectric nanogenerator through solvent replacement; In the electrolyte solution, the electrolyte is sodium citrate, and the electrolyte concentration is 0.6-1.5 M.

2. The preparation method according to claim 1, characterized in that In step (1): The amount of initiator added is 1% to 4% of the sum of the mass of hydroxyethyl methacrylate and soluble starch; The initiator is ammonium persulfate.

3. The preparation method according to claim 1, characterized in that In step (1), the organic solvent is dimethyl sulfoxide.

4. A high-strength, tear-resistant conductive hydrogel suitable for a triboelectric nanogenerator, prepared by the preparation method according to any one of claims 1 to 3.

5. The high-strength tear-resistant conductive hydrogel according to claim 4, characterized in that: The high-strength tear-resistant conductive hydrogel has a tensile modulus of not less than 0.4 MPa, a compression modulus of not less than 0.5 MPa, and a fracture energy of not less than 4.20 kJ / m 2 , the ionic conductivity is not less than 1.7 mS / cm.

6. Use of the high-strength tear-resistant conductive hydrogel according to claim 4 or 5 in a triboelectric nanogenerator.

7. The use according to claim 6, characterized in that The high-strength tear-resistant conductive hydrogel is used as a flexible electrode material for a friction nanogenerator.

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