An all-transparent stretchable flexible pump based on ion electrode and a preparation method thereof

Abstract

The application discloses a kind of full transparent stretchable flexible pump based on ion electrode and preparation method thereof, flexible pump is prepared by ion electrode material patterning, and the scheme design of electrode structure is coupled with dielectric liquid material to prepare, it is simple, and preparation is efficient, device reliable.And flexible pump has the characteristics of full transparent, full flexible, stretchable, two-way pumping, noiseless, easy to integrate and high pressure output, single flexible pump can reach more than 90 kilo-pa output pressure, can provide powerful force output response for soft robot and soft driver, good mechanical compliance can adapt to complex working conditions, solve the problem that traditional electrofluidic pump electrode is not suitable for transparent soft driver due to opacity and poor stretchability.

Description

Technical Field

[0001] This invention belongs to the field of flexible pump technology, and in particular relates to a fully transparent stretchable flexible pump based on an ion electrode and its preparation method. Background Technology

[0002] With the development of science and technology, materials and technologies that integrate multiple disciplines such as acoustics, optics, electricity, and heat have come into view. Traditional rigid electronics technology is rapidly developing towards flexibility to meet increasingly complex needs. Soft robots and actuators made of flexible materials have shown broad application prospects in the fields of medicine, industry, wearable devices, and robotics. However, due to the limitations of the size, weight, and complex structure of traditional rigid actuators, it is difficult to meet the requirements of portability, integration, and adaptability to complex working conditions. Soft actuators made of flexible materials have become the alternative to traditional rigid actuators due to their excellent compliance, light weight, small size, and stretchability.

[0003] Currently, common intrinsic actuation schemes using flexible materials include electrostatic actuation using dielectric elastomers, stimulus-responsive actuation using hydrogels, and temperature-responsive actuation using shape memory polymers. Although these schemes can achieve actuation by soft actuators due to their properties, they exhibit low driving force and are difficult to drive large loads. Schemes relying on other actuation sources mainly include pneumatic actuation and hydraulic actuation, both of which can provide ideal high driving force output response. However, they require a rigid pump source to provide pressure and flow input. The size, weight, and structural limitations of the pump source make it difficult to integrate to achieve a fully compliant actuator, thus limiting its further application in soft actuators.

[0004] Traditional rigid pump sources rely primarily on mechanical structures for pumping, typically containing bulky rigid components such as gears, blades, and motors. Weight limitations often result in these components consuming a significant portion of the output performance of the soft actuator during integration, drastically reducing load capacity. Even lightweight micro-pump sources struggle to escape the limitations of rigid components, exhibiting complex and precise structures that fail to meet compliance and adaptability requirements. Furthermore, noise is an unavoidable issue with the mechanical components within the pump body. Electrofluid pumps, driven by electrofluid dynamics, demonstrate excellent potential for integration into soft actuators, offering features such as quiet output, full flexibility, stretchability, lightweight, small size, and ease of integration. They can achieve fluid pumping without rigid components. However, electrofluid pumps are limited by electrode materials, making it difficult to achieve full stretchability and transparency to match transparent soft actuators. Full stretchability refers to the stretchability of both the electrode and substrate materials.

[0005] Electrofluid pumps are limited not only by their structural design, which makes it difficult to achieve higher pressure output response to drive larger loads and broaden application scenarios, but also by their electrofluid dynamics driving principle, which limits their ability to drive only special dielectric liquids. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention aims to provide a fully transparent, stretchable, flexible pump based on an ion electrode and its preparation method, thus solving the problems of opaque electrodes and poor stretchability in traditional electrofluid pumps.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0008] A fully transparent, stretchable, flexible pump based on ion electrodes is provided, comprising a flexible pump body. The flexible pump body includes a first layer of TPU film and a second layer of TPU film that are bonded together in a sealed and transparent manner. A first electrode is disposed on the bonding surface of the first layer of TPU film, and a second electrode is disposed on the bonding surface of the second layer of TPU film. The first and second electrodes have a certain thickness and are centrally symmetrically arranged, forming a fluid channel between the first and second layers of TPU film. A fluid medium is disposed within the fluid channel. Both the first and second electrodes are transparent, stretchable ion electrodes.

[0009] Two silicone hoses connected to the fluid channel are respectively installed at both ends of the flexible pump body along its length. Both silicone hoses are sealed between the first TPU film and the second TPU film.

[0010] Conductive tape is attached to both the first and second electrodes, with one end of the conductive tape leading out to the outside of the flexible pump body for electrical connection with the positive or negative terminal of the power supply.

[0011] The basic principle of the fully transparent, stretchable, flexible pump based on ion electrodes in this invention is as follows: A first electrode and a second electrode are disposed within the flexible pump body, and a fluid channel is provided between the first and second electrodes; the first and second electrodes are transparent, stretchable ion electrodes and are electrically connected to the positive and negative terminals of a power supply, respectively; a fluid medium, such as an electronic fluorinated liquid, is filled into the fluid channel. When the first and second electrodes are energized, a high electric field is formed. Under the high electric field condition, the molecules in the electronic fluorinated liquid are ionized into positive and negative ions. Due to the unique structure of the fluorinated liquid molecules, the number of negative ions ionized is far greater than that of positive ions, thus forming a net ion flow of negative ions moving towards the positive electrode under the action of the electric field; around the negative electrode, under high voltage conditions, electrons detach from the cathode electrode material and are injected into the fluid to combine with positive ions; while around the positive electrode, electrons detach from the negative ions and enter the electrode. By injecting charge into the liquid through this electric field, a net ion flow from the negative electrode to the positive electrode is generated in the liquid, which drives the movement of neutral molecules to form an ion drag phenomenon, making the liquid macroscopically appear as a continuous directional flow, thus realizing the function of pumping liquid; when the first electrode and the second electrode are connected to the negative electrode and the positive electrode of the power supply respectively, the flexible pump pumps liquid in reverse.

[0012] In the fully transparent stretchable flexible pump based on ion electrodes, both the first and second electrodes are transparent stretchable ion electrodes. They are not easily broken when stretched and are firmly and reliably bonded to the TPU film. This gives the flexible pump the characteristics of being fully transparent, fully flexible and stretchable, making it more suitable for transparent soft actuators and solving the problems of opaque electrodes and poor stretchability in traditional electrofluid pumps.

[0013] Furthermore, as a specific arrangement of the first electrode and the second electrode, both the first electrode and the second electrode include an electrode bus arranged along the length direction of the flexible pump body, and a plurality of electrode forks are arranged at intervals on one side of the electrode bus; one end of the electrode bus is provided with an electrode pin for electrically connecting with the conductive adhesive tape.

[0014] The electrode busbars in the first and second electrodes are arranged in parallel with spacing; the multiple electrode interdigitates in the first and second electrodes are arranged opposite each other and staggered; the space between the multiple electrode interdigitates in the first and second electrodes is a fluid channel.

[0015] Furthermore, the first and second TPU films are thermo-sealed together along the inner sides of the two electrode buses. This improves the sealing performance of the flexible pump, ensuring that the dielectric fluid does not leak even under internal pressures up to 90 kPa, guaranteeing safety and reliability. It also significantly enhances the pressure output performance of the flexible pump, enabling it to drive larger loads and providing excellent force output response for fluid-driven soft actuation forces and soft robots. Simultaneously, it features bidirectional pumping with voltage polarity control, allowing for applications in a wider range of fields.

[0016] Furthermore, the thickness of the first electrode and the second electrode is 0.12 mm; the width of the electrode bus in the first electrode and the second electrode is 1 mm; 18 electrode fingers are provided on the electrode bus, each electrode finger is rectangular, each electrode finger is 7 mm long and 0.7 mm wide; the bends of each electrode finger are rounded with a radius of 0.3 mm.

[0017] The electrode pins are 4mm long and 5mm wide;

[0018] The projected overlap length of the interdigitated fingers of the first and second electrodes is 4.5 mm, the narrow gap between the interdigitated fingers is 1 mm, and the wide gap between the interdigitated fingers is 2 mm.

[0019] The thickness of the first and second electrodes is the same as the height of the fluid channel. A smaller electrode thickness results in a lower fluid channel height, smaller flow space, and lower flow rate. Excessive electrode thickness makes sealing more difficult and increases the risk of leakage. If the electrode interdigitation fingers are too long, the fluid channel is prone to expansion, leading to a decrease in output pressure. Conversely, a shorter interdigitation finger length results in a narrower fluid space, a thinner external hose, and a lower flow rate. If the interdigitation fingers are too wide, the overall electrode length increases, leading to a higher operating current and a greater risk of electrical breakdown. Conversely, a narrower interdigitation finger width increases manufacturing difficulty. Longer interdigitation fingers also make the fluid channel more prone to expansion, resulting in lower pressure and reduced flow rate. Smaller gaps between the interdigitation fingers increase the risk of electrical breakdown at the same voltage, while larger gaps result in lower output performance. The wide gap between the interdigitation fingers is set to twice the narrow gap to create an asymmetric electric field, inducing liquid flow. The first and second electrodes have a total of 18 pairs of interdigitation fingers, designed for optimal performance of flexible pumps within a length of 100mm.

[0020] Furthermore, the fluid medium is an electronic fluorinated liquid. Using electronic fluorinated liquid as both the dielectric and the pumping fluid medium, its excellent electrical insulation can completely encapsulate the electronic components to isolate them from water and air, ensuring the stable operation of the electronic components. This solves the problems of aging, reliability, and safety of internal electronic components when flexible pumps are integrated with soft actuators or soft robots, and improves the service life and reliability of the entire equipment.

[0021] Furthermore, the present invention also provides a method for preparing a fully transparent, stretchable, flexible pump based on an ion electrode, comprising:

[0022] Step 1: Place the first TPU film and the second TPU film with transparent stretchable ion electrodes face to face and press them together with a soldering iron through the PTFE film along the inner side of the electrode bus of the transparent stretchable ion electrodes to form a flexible pump body with sealed sides.

[0023] Step 2: Insert two silicone tubes into the space between the two TPU films at the front and rear ends of the flexible pump body to a depth of 5-10 mm, inject silicone into the gaps to seal, and let it dry for 2 hours to cure the silicone.

[0024] Step 3: Cut the conductive tape into a suitable shape and attach it to the electrode pins of the transparent stretchable ion electrode between the two layers of TPU film to lead out the electrode, thus completing the preparation of the flexible pump.

[0025] Further, in step 1, the method for preparing the TPU film with a transparent, stretchable ion electrode includes:

[0026] Step 1.1: Prepare TPU solution: Mix thermoplastic polyurethane particles, tetrahydrofuran solution and dimethylformamide solution in a mass ratio of 1:8:1, and stir magnetically for 10 hours at room temperature until the thermoplastic polyurethane particles are completely dissolved to form a colorless and transparent TPU solution.

[0027] Step 1.2, Preparation of ionic TPU solution: The TPU solution obtained in step 1.1 is mixed with the 1-ethyl-3-methylimidazolium diimine ionic salt solution at a mass ratio of 5:1, and magnetically stirred at room temperature for 1 hour to obtain a colorless and transparent ionic TPU solution;

[0028] Step 1.3, Prepare the electrode mask: According to the design dimensions of the transparent stretchable ion electrode, etch the electrode mask on the adhesive side of the release paper tape;

[0029] Step 1.4: Attach the electrode mask onto the TPU film;

[0030] Step 1.5: Coat the ionic TPU solution onto the electrode mask and smooth it with a glass slide. Then, ventilate and dry the ionic TPU solution on the electrode mask to form a transparent and stretchable ionic electrode. Finally, peel off the electrode mask to obtain a TPU film with a transparent and stretchable ionic electrode.

[0031] Traditional electrodes are typically made of electronically conductive materials such as copper tape, Ag, and carbon electrodes. These materials suffer from several drawbacks: they are opaque, have poor stretchability and are prone to breakage under tension, and they do not bond firmly to the substrate material. This invention proposes a method for fabricating a fully transparent, stretchable, flexible pump based on an ion electrode, which solves these three problems. First, the proposed ion-based TPU solution is transparent and can be easily patterned to create desired planar electrode shapes, which are then combined with a transparent TPU film to form a fully transparent flexible pump. Second, the proposed ion electrode is stretchable, exhibiting superior stretchability compared to traditional electronic electrodes. Third, the selected fabrication material is coupled with the TPU film; the compatibility of the same material allows TPU molecules from the ion solution to diffuse into the TPU film during drying, thus firmly fixing the electrode to the TPU film.

[0032] The beneficial effects of the present invention are as follows: 1. The flexible pump prepared by using a transparent stretchable ion electrode and a TPU film substrate has the characteristics of being fully transparent, fully flexible, highly stretchable, lightweight, and easy to integrate, and can adapt to more complex application scenarios.

[0033] 2. The first and second TPU films are tightly bonded together, and a hot-pressing method is used to seal both sides and separate the electrode bus, forming a specific electrode structure and fluid channel. This improves the sealing performance of the flexible pump and greatly enhances its pressure output performance, enabling it to drive larger loads and providing excellent force output response for fluid-driven soft actuation forces and soft robots.

[0034] 3. The flexible pump manufacturing scheme adopts a combination of hot pressing process and silicone sealing to manufacture the device, which solves the leakage and sealing problems of the flexible pump under high pressure output. No liquid leakage will occur even under internal cavity pressure of up to 90kPa, making it safe and reliable. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of a fully transparent, stretchable, flexible pump based on an ion electrode.

[0036] Figure 2 This is a schematic diagram of the internal structure of a flexible pump.

[0037] Figure 3 A schematic diagram of a structure in which the first and second electrodes are arranged symmetrically at the center.

[0038] The components are: 1. First TPU film; 2. Second TPU film; 3. First electrode; 4. Second electrode; 5. Fluid channel; 6. Silicone tubing; 7. Conductive tape; 8. Electrode bus; 9. Electrode interdigitator; 10. Electrode pin. Detailed Implementation

[0039] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0040] like Figures 1-2 As shown, the present invention provides a fully transparent, stretchable, flexible pump based on ion electrodes, comprising a flexible pump body, the flexible pump body including a first layer of TPU film 1 and a second layer of TPU film 2 that are bonded together in a sealed and transparent manner. A first electrode 3 is disposed on the bonding surface of the first layer of TPU film 1, and a second electrode 4 is disposed on the bonding surface of the second layer of TPU film 2. The first electrode 3 and the second electrode 4 have a certain thickness and are centrally symmetrically arranged, forming a fluid channel 5 between the first layer of TPU film 1 and the second layer of TPU film 2. A fluid medium is disposed within the fluid channel 5. Both the first electrode 3 and the second electrode 4 are transparent, stretchable ion electrodes.

[0041] Two silicone hoses 6 are respectively provided at both ends of the flexible pump body along its length, which are connected to the two ends of the fluid channel 5. Both silicone hoses 6 are sealed between the first TPU film 1 and the second TPU film 2. Conductive tapes 7 are connected to the first electrode 3 and the second electrode 4. One end of the conductive tape 7 is led out to the outside of the flexible pump body for electrical connection with the positive or negative power supply.

[0042] A first electrode 3 and a second electrode 4 are disposed within the flexible pump body, and a fluid channel 5 is provided between the first electrode 3 and the second electrode 4. The first electrode 3 and the second electrode 4 are transparent and stretchable ion electrodes and are electrically connected to the positive and negative terminals of the power supply, respectively. The fluid channel 5 is filled with a fluid medium, such as an electronic fluorinated liquid. The electronic fluorinated liquid serves as both the dielectric and the pumping fluid medium. Its excellent electrical insulation properties can completely encapsulate the electronic components to isolate them from water and air, ensuring the stable operation of the electronic components. This solves the problems of aging, reliability, and safety of internal electronic components when the flexible pump is integrated with a soft actuator or soft robot, thereby improving the overall service life and reliability of the device. When the first electrode 3 and the second electrode 4 are energized, a high electric field is formed. Under this high electric field, the molecules in the fluorinated liquid are ionized into positive and negative ions. Due to the unique structure of the fluorinated liquid molecules, the number of negative ions generated is far greater than that of positive ions. Thus, under the action of the electric field, a net ion flow of negative ions moves towards the positive electrode. Around the negative electrode, under high voltage, electrons detach from the cathode electrode material and are injected into the fluid to combine with positive ions. Around the positive electrode, electrons detach from the negative ions and enter the electrode. Through this charge injection into the liquid by the electric field, a net ion flow from the negative electrode to the positive electrode is generated in the liquid, driving the movement of neutral molecules to form an ion drag phenomenon. This makes the liquid macroscopically exhibit a continuous directional flow, realizing the function of pumping the liquid. When the first electrode 3 and the second electrode 4 are connected to the negative and positive terminals of the power supply, respectively, the flexible pump pumps the liquid in reverse, realizing the bidirectional pumping function of the flexible pump.

[0043] In the fully transparent stretchable flexible pump based on ion electrodes, the first electrode 3 and the second electrode 4 are both transparent stretchable ion electrodes. They are not easy to break when stretched and are firmly and reliably bonded to the TPU film. This makes the flexible pump fully transparent, fully flexible and stretchable, which is more suitable for transparent soft actuators and solves the problems of opaque electrodes and poor stretchability of traditional electrofluid pumps.

[0044] In the plan, such as Figure 3As shown, as a specific arrangement of the first electrode 3 and the second electrode 4, both the first electrode 3 and the second electrode 4 include an electrode bus 8 arranged along the length direction of the flexible pump body, and a plurality of electrode forks 9 are arranged at intervals on one side of the electrode bus 8; one end of the electrode bus 8 is provided with an electrode pin 10 for electrical connection with the conductive tape 7.

[0045] The electrode busbars 8 in the first electrode 3 and the second electrode 4 are arranged in parallel at intervals; the multiple electrode interdigitates 9 in the first electrode 3 and the second electrode 4 are arranged opposite to each other and staggered; the space between the multiple electrode interdigitates 9 in the first electrode 3 and the second electrode 4 is a fluid channel 5.

[0046] Specifically, the thickness of the first electrode 3 and the second electrode 4 is 0.12 mm; the width of the electrode bus 8 in the first electrode 3 and the second electrode 4 is 1 mm; 18 electrode interdigitates 9 are provided on the electrode bus 8, each electrode interdigitate 9 is rectangular, each electrode interdigitate 9 is 7 mm long and 0.7 mm wide; the bends of each electrode interdigitate 9 are rounded with a radius of 0.3 mm; the length of the electrode pin 10 is 4 mm and the width is 5 mm; the projected overlap length of the electrode interdigitates 9 in the first electrode 3 and the second electrode 4 is 4.5 mm, the narrow gap between the electrode interdigitates 9 is 1 mm, and the wide gap between the electrode interdigitates 9 is 2 mm.

[0047] The thickness of the first electrode 3 and the second electrode 4 is the same as the height of the fluid channel 5. A smaller electrode thickness results in a lower fluid channel 5, smaller flow space, and lower flow rate. Excessive electrode thickness makes sealing more difficult and increases the risk of leakage. If the electrode interdigitates 9 are too long, the fluid channel 5 is prone to expansion, leading to a decrease in output pressure. Conversely, a shorter electrode interdigitates 9 result in a narrower fluid space in the fluid channel 5, a thinner external hose, and a lower flow rate. If the electrode interdigitates 9 are too wide, the overall electrode length increases, leading to a higher operating current and a greater risk of electrical breakdown. Conversely, a narrower electrode interdigitates 9 increase manufacturing difficulty. A longer electrode interdigitates 9 make the fluid channel 5 more prone to expansion, resulting in lower pressure and reduced flow rate. A smaller gap between the electrode interdigitates 9 makes electrical breakdown more likely at the same voltage, while a larger gap results in lower output performance. The wide gap between the electrode interdigitates 9 is set to be twice the width of the narrow gap to create an asymmetric electric field, inducing liquid flow. The first electrode 3 and the second electrode 4 are provided with a total of 18 pairs of electrode interdigitates 9, which are designed according to the optimal performance of the flexible pump within a length of 100mm.

[0048] Preferably, the first TPU film 1 and the second TPU film 2 are thermo-sealed together along the inner sides of the two electrode buses 8 to form a specific electrode structure and fluid channel 5, which improves the sealing performance of the flexible pump. The pressure output response of a single flexible pump can exceed 20 kPa without deformation limitation and can reach up to 92 kPa when the cavity deformation is limited. It is safe and reliable, and greatly improves the pressure output performance of the flexible pump, enabling it to drive larger loads. It provides excellent force output response for fluid-driven soft actuation forces and soft robots, while also having the characteristics of bidirectional pumping with voltage polarity control, which can be applied to more fields.

[0049] This invention also provides a method for fabricating a fully transparent, stretchable, flexible pump based on an ion electrode, comprising:

[0050] Step 1: Place the first TPU film 1 and the second TPU film 2 with transparent stretchable ion electrodes face to face and use a soldering iron to heat press along the inner side of the electrode bus 8 of the transparent stretchable ion electrodes through the PTFE film to form a flexible pump body with sealed sides.

[0051] Step 2: Insert two silicone tubes 6 into the space between the two TPU films at the front and rear ends of the flexible pump body to a depth of 5-10 mm, inject silicone into the gaps to seal, and dry for 2 hours to cure the silicone.

[0052] Step 3: Cut the conductive tape 7 into a suitable shape and attach it to the electrode pin 10 of the transparent stretchable ion electrode between the two TPU films to lead out the electrode, thus completing the preparation of the flexible pump.

[0053] The first TPU film 1 and the second TPU film 2 are bonded together and sealed using hot pressing and silicone to prepare a flexible pump. The pump is small in size, has excellent performance, is simple to manufacture, and is highly efficient in production. Multiple flexible pumps can be prepared at once.

[0054] Further, in step 1, the method for preparing the TPU film with a transparent, stretchable ion electrode includes:

[0055] Step 1.1: Prepare TPU solution: Mix thermoplastic polyurethane particles, tetrahydrofuran solution and dimethylformamide solution in a mass ratio of 1:8:1, and stir magnetically for 10 hours at room temperature until the thermoplastic polyurethane particles are completely dissolved to form a colorless and transparent TPU solution.

[0056] Step 1.2, Preparation of ionic TPU solution: The TPU solution obtained in step 1.1 is mixed with the 1-ethyl-3-methylimidazolium diimine ionic salt solution at a mass ratio of 5:1, and magnetically stirred at room temperature for 1 hour to obtain a colorless and transparent ionic TPU solution;

[0057] Step 1.3, Prepare the electrode mask: According to the design dimensions of the transparent stretchable ion electrode, etch the electrode mask on the adhesive side of the release paper tape;

[0058] Step 1.4: Attach the electrode mask onto the TPU film;

[0059] Step 1.5: Coat the ionic TPU solution onto the electrode mask and smooth it with a glass slide. Then, ventilate and dry the ionic TPU solution on the electrode mask to form a transparent and stretchable ionic electrode. Finally, peel off the electrode mask to obtain a TPU film with a transparent and stretchable ionic electrode.

[0060] Traditional electrodes are typically made of electronically conductive materials such as copper tape, Ag, and carbon electrodes. These materials suffer from several drawbacks: they are opaque, have poor stretchability and are prone to breakage under tension, and they do not bond firmly to the substrate material. This invention proposes a method for fabricating a fully transparent, stretchable, flexible pump based on an ion electrode, which solves these three problems. First, the proposed ion-based TPU solution is transparent and can be easily patterned to create desired planar electrode shapes, which are then combined with a transparent TPU film to form a fully transparent flexible pump. Second, the proposed ion electrode is stretchable, exhibiting superior stretchability compared to traditional electronic electrodes. Third, the selected fabrication material is coupled with the TPU film; the compatibility of the same material allows TPU molecules from the ion solution to diffuse into the TPU film during drying, thus firmly fixing the electrode to the TPU film.

[0061] In summary, the present invention provides a fully transparent, stretchable, flexible pump based on ion electrodes and its fabrication method. This method utilizes patterned ion electrode materials that match a flexible substrate, and a design that couples the electrode structure with a dielectric material. The process is simple, efficient, and the device is reliable. It features full transparency, full flexibility, stretchability, bidirectional pumping, noiselessness, ease of integration, and high-pressure output. A single flexible pump can achieve an output pressure exceeding 90 kPa, providing powerful force output for soft robots and soft actuators. Its excellent mechanical compliance allows it to adapt to complex working conditions.

Claims

1. A fully transparent, stretchable, flexible pump based on an ion electrode, characterized in that, The device includes a flexible pump body comprising a first layer of TPU film and a second layer of TPU film that are bonded together in a sealed and transparent manner. A first electrode is disposed on the bonding surface of the first layer of TPU film, and a second electrode is disposed on the bonding surface of the second layer of TPU film. The first and second electrodes have a certain thickness and are symmetrically arranged at the center, forming a fluid channel between the first and second layers of TPU film. A fluid medium is disposed within the fluid channel. Both the first and second electrodes are transparent and stretchable ion electrodes, which are prepared by mixing thermoplastic polyurethane with a 1-ethyl-3-methylimidazolium diimide ion salt solution. Two silicone hoses connected to the two ends of the fluid channel are respectively provided at both ends of the flexible pump body along its length. Both silicone hoses are sealed between the first TPU film and the second TPU film. Conductive tape is connected to both the first and second electrodes. One end of the conductive tape is led out to the outside of the flexible pump body for electrical connection with the positive or negative terminal of the power supply. Both the first electrode and the second electrode include electrode busbars arranged along the length of the flexible pump body, and the first TPU film and the second TPU film are heat-sealed together along the inner sides of the two electrode busbars.

2. The fully transparent, stretchable, flexible pump based on an ion electrode according to claim 1, characterized in that, A plurality of electrode forks are spaced apart on one side of the electrode bus; an electrode pin for electrically connecting with the conductive adhesive tape is provided at one end of the electrode bus. The electrode busbars in the first electrode and the second electrode are arranged in parallel with spacing; the multiple electrode interdigitates in the first electrode and the second electrode are arranged opposite each other and staggered; the space between the multiple electrode interdigitates in the first electrode and the second electrode is the fluid channel.

3. The fully transparent, stretchable, flexible pump based on an ion electrode according to claim 2, characterized in that, The two silicone tubes are sealed to the first and second TPU films via silicone.

4. The fully transparent, stretchable, flexible pump based on an ion electrode according to claim 2, characterized in that, The thickness of the first electrode and the second electrode is 0.12 mm; the width of the electrode bus in the first electrode and the second electrode is 1 mm; 18 electrode forks are provided on the electrode bus, each electrode fork is rectangular, each electrode fork is 7 mm long and 0.7 mm wide; the bends of each electrode fork are rounded with a radius of 0.3 mm. The electrode pins are 4mm long and 5mm wide; The projected overlap length of the interdigitated fingers of the first and second electrodes is 4.5 mm, the narrow gap between the interdigitated fingers is 1 mm, and the wide gap between the interdigitated fingers is 2 mm.

5. The fully transparent, stretchable, flexible pump based on an ion electrode according to claim 1, characterized in that, The fluid medium is an electronic fluorinated liquid.

6. A method for preparing a fully transparent, stretchable, flexible pump based on an ion electrode according to any one of claims 2 to 5, characterized in that, include: Step 1: Place the first TPU film and the second TPU film with transparent stretchable ion electrodes face to face and press them together with a soldering iron through the PTFE film along the inner side of the electrode bus of the transparent stretchable ion electrodes to form a flexible pump body with sealed sides. Step 2: Insert two silicone tubes into the space between the two TPU films at the front and rear ends of the flexible pump body to a depth of 5-10mm, inject silicone into the gaps to seal, and let it dry for 2 hours to cure the silicone. Step 3: Cut the conductive tape into a suitable shape and attach it to the electrode pins of the transparent stretchable ion electrode between the two layers of TPU film to lead out the electrode, thus completing the preparation of the flexible pump.

7. The method for preparing a fully transparent, stretchable, flexible pump based on an ion electrode according to claim 6, characterized in that, In step 1, the method for preparing a TPU film with a transparent, stretchable ion electrode includes: Step 1.1: Prepare TPU solution: Mix thermoplastic polyurethane particles, tetrahydrofuran solution and dimethylformamide solution in a mass ratio of 1:8:1, and stir magnetically for 10 hours at room temperature until the thermoplastic polyurethane particles are completely dissolved to form a colorless and transparent TPU solution. Step 1.2, Preparation of ionic TPU solution: The TPU solution obtained in step 1.1 is mixed with the 1-ethyl-3-methylimidazolium diimine ionic salt solution at a mass ratio of 5:1, and magnetically stirred at room temperature for 1 hour to obtain a colorless and transparent ionic TPU solution; Step 1.3, Prepare the electrode mask: According to the design dimensions of the transparent stretchable ion electrode, etch the electrode mask on the adhesive side of the release paper tape; Step 1.4: Attach the electrode mask onto the TPU film; Step 1.5: Coat the ionic TPU solution onto the electrode mask and smooth it with a glass slide. Then, ventilate and dry the ionic TPU solution on the electrode mask to form a transparent and stretchable ionic electrode. Finally, peel off the electrode mask to obtain a TPU film with a transparent and stretchable ionic electrode.

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