Device for the production of flexible long conductors based on liquid metal

Abstract

The application provides a preparation device for a flexible long wire based on liquid metal, and particularly, the preparation device comprises a flexible hose, a capillary tube and a sealing structure, the capillary tube is inserted into the end of the flexible hose in cooperation, and the sealing structure is arranged at the connecting position between the capillary tube and the flexible hose, and the sealing structure is used for sealing the connecting position. The liquid metal can be injected into the flexible hose through the capillary tube, so that the flexible wire is formed in the flexible hose. The connecting position between the flexible hose and the capillary tube is provided with the sealing structure, the sealing effect of the connecting position is improved, the liquid metal in the preparation device is not disturbed by air, and the liquid metal flexible long wire with good quality is obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible electronics, in particular to a preparation device of a flexible long wire based on liquid metal. BACKGROUND

[0002] The liquid metal wire is a soft wire with good flexibility. Its advantages are that it can be bent multiple times with flexible electronic devices and will not be damaged due to the fatigue characteristics of the metal. It also has the characteristics of longitudinal extension and has good application prospects. Among different liquid metals, gallium-based liquid metal is widely concerned by researchers because of its easy-to-control melting point and low toxicity. However, the anti-interference ability of liquid metal is poor, and it is easy to be oxidized by air to generate oxidation impurities. Therefore, when preparing a liquid metal flexible wire, it is easy to cause the quality of the flexible wire to decrease, and it is difficult to obtain a liquid metal flexible long wire with good quality. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a preparation device of a flexible long wire based on liquid metal to solve the above problems.

[0004] In order to achieve the above purpose, the present application provides a preparation device of a flexible long wire based on liquid metal, which comprises a flexible hose, a capillary tube and a sealing structure. The capillary tube is inserted into the end of the flexible hose in cooperation. The sealing structure is arranged at the connecting part between the capillary tube and the flexible hose, and the sealing structure is used to seal the connecting part.

[0005] Optionally, the sealing structure comprises a sealing coil and a welding part. The sealing coil is spirally wound on the flexible hose, and the sealing coil is fixedly connected to the capillary tube through the welding part.

[0006] Optionally, the sealing structure comprises a sealing glue layer, and the sealing glue layer is uniformly coated on the sealing coil.

[0007] Optionally, the inlet end of the preparation device is connected with a filter syringe, and the filter syringe is provided with a filter layer. The filter layer is used to filter the oxides in the liquid metal inside the syringe.

[0008] Based on the same inventive concept, a preparation method of a flexible long wire based on liquid metal comprises:

[0009] Bend the two ends of the flexible hose upward;

[0010] Inject an alkaline solution into the first capillary tube connected to the flexible hose, so that the alkaline solution fills the inside of the flexible hose;

[0011] Injecting liquid metal into the first capillary tube connected to the flexible hose, and placing the flexible hose, the first capillary tube, and the second capillary tube horizontally until the liquid metal flows out of the second capillary tube;

[0012] The second capillary and the first capillary are sealed in sequence to obtain a long flexible wire.

[0013] Optionally, the step of bending both ends of the flexible hose upwards may include:

[0014] inserting the first capillary tube and the second capillary tube into both ends of the flexible hose respectively;

[0015] A sealing coil is spirally wound around the connection between the flexible hose and the first capillary tube, and the connection between the flexible hose and the second capillary tube, and the sealing coil is welded to the first capillary tube and the second capillary tube respectively to form corresponding welding parts.

[0016] Optionally, the step of bending both ends of the flexible hose upwards comprises:

[0017] A height of the first capillary tube away from one end of the flexible hose is less than or equal to a height of the second capillary tube away from one end of the flexible hose.

[0018] Optionally, the step of injecting the alkaline solution into the first capillary tube connected to the flexible hose includes: mixing a color indicator into the alkaline solution.

[0019] Optionally, injecting liquid metal into the first capillary tube connected to the flexible hose comprises:

[0020] The injection speed of liquid metal is set to 0.075ml / s-0.5ml / s.

[0021] Optionally, the sequentially sealing the second capillary and the first capillary comprises:

[0022] closing the second capillary and continuing to inject liquid metal into the capillary through the first capillary;

[0023] When the liquid metal injected into the flexible hose overflows from the first capillary tube, the injection is stopped and the first capillary tube is closed.

[0024] Optionally, continuously injecting liquid metal into the capillary through the first capillary comprises:

[0025] The injection amount of the liquid metal after the second capillary is closed is 0.5 times to 1 times the injection amount of the liquid metal before the second capillary is closed.

[0026] Optionally, the step of sequentially sealing the second capillary tube and the first capillary tube further comprises:

[0027] The second capillary and the first capillary are sealed by flattening or bending.

[0028] From the above description, it can be seen that the preparation device of the flexible long wire based on liquid metal provided in the present application can easily inject liquid metal into the flexible hose through the capillary, so that the liquid metal forms a flexible wire in the flexible hose, and the connection part between the flexible hose and the capillary is provided with a sealing structure, which can improve the sealing effect of the connection part, reduce the interference of air on the liquid metal inside the preparation device, avoid oxidation and deterioration of the liquid metal, ensure the quality of the flexible wire, and obtain a liquid metal flexible long wire with better quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a schematic diagram of the structure of the preparation device in the embodiment of the present application;

[0031] Figure 2 This is a schematic cross-sectional view of the sealing structure in an embodiment of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of the filter syringe in the embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the connection structure between the preparation device and the filtering syringe in the embodiment of the present application;

[0034] Figure 5 Schematic diagram of the preparation method in the embodiment of the present application;

[0035] Figure 6 This is a schematic diagram of the assembly process of the preparation device in the embodiment of the present application;

[0036] Figure 7 This is a schematic diagram of the closed process of the preparation device in the embodiment of this application.

[0037] Explanation of the reference numerals: 100, flexible hose; 200, capillary tube; 200a, first capillary tube; 200b, second capillary tube; 300, sealing structure; 310, sealing coil; 320, welding part; 400, filter syringe; 410, syringe body; 420, needle; 430, filter layer. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] Wires made of liquid metal are relatively flexible soft wires. Their advantage is that they can be bent multiple times with flexible electronic devices without being damaged by the fatigue characteristics of the metal. They also have the characteristic of longitudinal extension, so they have good application prospects. Common liquid metals can be gallium-indium alloys, gallium-tin alloys or tin-indium alloys. Taking gallium-indium alloys as an example, since the melting point of gallium-based liquid is easy to control and its toxicity is low, it has attracted widespread attention from researchers. Since liquid metal has poor anti-interference ability and is easily oxidized by air to generate oxidized impurities, the quality of the flexible wires can easily decline when preparing liquid metal flexible wires, making it difficult to obtain high-quality liquid metal flexible long wires.

[0041] The present application provides a device for preparing a flexible long wire based on liquid metal, comprising a flexible hose 100, a capillary tube 200 and a sealing structure 300, wherein the capillary tube 200 is inserted into the end of the flexible hose 100 in a coordinated manner, and the sealing structure 300 is provided at the connection portion between the capillary tube 200 and the flexible hose 100, and the sealing structure 300 is used to seal the connection portion. For details, please refer to Figure 1 and Figure 4The preparation device in the application can be used to prepare a long flexible liquid metal wire. The flexible tube 100 can be used to load the liquid metal and also used as a forming mold of the flexible wire to form a corresponding linear structure of the liquid metal in the flexible tube 100. When the flexible tube 100 is used to prepare a long flexible wire, the liquid metal can slowly flow along the length direction of the flexible tube 100 when the liquid metal is injected into the capillary tube 200 at one end of the flexible tube 100, and the liquid metal can gradually fill the inner cavity of the flexible tube 100. The capillary tube 200 is arranged at both ends of the flexible tube 100 to inject the liquid metal into the inner cavity of the flexible tube 100. Since the capillary tube 200 is arranged at the end of the flexible tube 100, the sealing structure 300 arranged at the connecting part between the capillary tube 200 and the flexible tube 100 can seal the connecting part to improve the sealing performance of the preparation device and prevent the outside air from entering the flexible tube 100 through the gap of the connecting part when the long flexible wire is prepared, so as to avoid the formation of an oxidation layer on the surface of the liquid metal in the flexible tube 100, thereby ensuring the quality of the long flexible wire.

[0042] It should be noted that the long flexible liquid metal wire is soft and is mostly used in flexible electronic devices. Therefore, to obtain a long flexible wire with good quality and continuity, the flexible tube 100 can be a soft tube with elasticity, which can bend or stretch along with the long flexible wire during the preparation process. In addition, the flexible tube 100 needs to have certain insulation effect to ensure the normal use of the long flexible wire after preparation. For example, the flexible tube 100 can be a silica gel tube with a Shore hardness A of 60, a length of 2 m-10 m, an outer diameter of 1 mm, and an inner diameter of 0.5 mm, which can bend or stretch along with the flexible wire while having good elasticity and insulation effect.

[0043] In addition, to facilitate the injection of the liquid metal into the flexible tube 100, the capillary tube 200 arranged at the end of the flexible tube 100 needs to be a hard tube segment to keep the end of the flexible tube 100 in an open state. The material of the capillary tube 200 can be copper alloy or silver alloy. On the one hand, copper alloy and silver alloy are not easy to react with liquid metals such as gallium-indium alloy, which can enable the stable injection of the liquid metal into the flexible tube 100. On the other hand, the hardness of copper alloy and silver alloy is low, so that the capillary tube 200 can be flattened after the preparation of the long flexible wire to seal the end of the long flexible wire. For example, the capillary tube 200 can be a red copper capillary tube 200 with an outer diameter of 0.8 mm and an inner diameter of 0.5 mm to facilitate the smooth injection of the liquid metal into the flexible tube 100.

[0044] The present application can be used to prepare a long liquid metal flexible wire. The specific operation process can be as follows: first, bend both ends of the flexible hose 100 upward, and use a syringe to inject an alkaline solution into one end of the flexible hose 100 so that the alkaline solution enters and gradually fills the entire flexible hose 100; then use a syringe to draw the liquid metal into the interior thereof and connect the syringe to the capillary 200 at one end of the flexible hose 100. Since air is easily drawn into the syringe when the liquid metal is transferred to the syringe, it is necessary to exhaust the air inside the syringe and squeeze out part of the liquid metal before connecting the syringe to the preparation device to reduce the influence of the air in the syringe on the preparation process; in order to make the liquid metal flow evenly in the flexible hose 100 and not be affected by the pressure of the liquid column, the flexible hose 100 and the capillary 200 are placed horizontally. At this time, since the flexible hose 100 is connected to the syringe, the internal and external pressures of the flexible hose 100 are in a balanced state, so the alkaline solution inside it will not flow out; under the squeezing action of the syringe, the liquid metal is slowly injected into the capillary 200 and passes through the capillary The tube 200 flows slowly in the flexible hose 100. Since the flexible hose 100 is filled with alkaline solution, after the liquid metal enters the flexible hose 100, it will displace the alkaline solution inside the flexible hose 100 and continuously discharge the alkaline solution in the flexible hose 100 through the other end thereof, thereby preventing air from interfering with the oxidation of the liquid metal. As the liquid metal continues to fill the flexible hose 100, the alkaline solution is continuously discharged, so that the alkaline solution in the flexible hose 100 is completely discharged and the interior of the flexible hose 100 is filled with liquid metal. Until the liquid metal flows out from the capillary 200 at the other end; at this time, in order to ensure the quality of the flexible long wire and make it have better continuity, the capillary 200 away from the injection end of the flexible hose 100 is closed, and liquid metal is continuously injected to allow the liquid metal to fully enter the flexible hose 100 and form a relatively continuous linear structure. When the liquid metal injected into the flexible hose 100 overflows from the injection end of the capillary 200, the capillary 200 at the injection end of the flexible hose 100 is closed, thereby completing the preparation of the liquid metal flexible long wire.

[0045] In some embodiments, the sealing structure 300 includes a sealing coil 310 and a welding portion 320. The sealing coil 310 is spirally wound around the flexible hose 100. The sealing coil 310 is fixedly connected to the capillary 200 through the welding portion 320. For details, please refer to Figure 2 .

[0046] It should be noted that by providing a sealing structure 300 at the connection portion between the capillary tube 200 and the flexible hose 100, the sealing performance of the connection portion can be improved, and air can be prevented from entering the flexible hose 100 and interfering with the surface of the liquid metal. After the capillary tube 200 is inserted into the end of the flexible hose 100, the sealing coil 310 is spirally wound around the end of the flexible hose 100 close to the capillary tube 200, so that the sealing coil 310 tightens the flexible hose 100 to the capillary tube 200. The sealing coil 310 can be made of thin copper wire, and the specific number of winding turns can be selected according to the insertion depth of the capillary tube 200. In order to prevent the sealing coil 310 from becoming loose after being wound and to effectively seal the end of the flexible hose 100, the sealing coil 310 can be welded to the capillary 200 by welding means. For example, the sealing coil 310 can be welded with solder to fix the sealing coil 310 on the capillary 200. At the same time, when welding the sealing coil 310, after the solder melts, it will be welded to the capillary 200 and the sealing coil 310 due to the influence of weldability, thereby avoiding air accumulation at the end of the flexible hose 100, thereby further improving the sealing effect of the sealing structure 300 between the flexible hose 100 and the capillary 200.

[0047] It should be noted that when winding the sealing coil 310, due to the small diameter of the sealing coil 310, it is necessary to control the winding force of the sealing coil 310 to avoid excessive force causing the sealing coil 310 to cut the flexible hose 100, and to avoid insufficient force causing the sealing coil 310 to not seal the connection part tightly; and during the welding process, the local temperature of the welding part 320 is relatively high, so the flexible hose 100 uses a hose with better heat resistance, such as the silicone tube mentioned above, which has a certain heat resistance effect, can avoid high temperature damage to the flexible hose 100, and ensure the integrity and sealing effect of the preparation device.

[0048] In some embodiments, the sealing structure 300 includes a sealing glue layer, which is evenly coated on the sealing coil 310; by coating the sealing glue on the flexible hose 100 and the capillary 200, on the one hand, the sealing effect between the flexible hose 100 and the capillary 200 can be further improved, and on the other hand, the sealing coil 310 can be prevented from loosening, thereby ensuring the firmness of its winding and greatly improving the sealing effect of the sealing structure 300; wherein, the sealing glue can adopt epoxy resin glue with good bonding effect and stable performance to improve the reliability of the seal.

[0049] As a feasible embodiment, the sealing structure 300 in the present application can also be set as a sealing colloid. Taking epoxy resin glue as an example, the epoxy resin glue can be directly applied to the connection between the flexible hose 100 and the capillary tube 200 to bond and seal them, simplifying the sealing steps and effectively reducing the difficulty of sealing.

[0050] In some embodiments, the inlet end of the preparation device is connected to a filter syringe 400, and a filter layer 430 is provided in the filter syringe 400. The filter layer 430 is used to filter the oxides in the liquid metal inside the syringe. Figure 3 ; The filter syringe 400 can be used to inject the liquid metal inside it into the flexible hose 100 through the capillary 200; since there is a hidden danger of oxidation of liquid metal during storage or transfer, in order to improve the quality of the flexible long wire, a filter layer 430 is set in the filter syringe 400 to filter the oxides in the liquid metal to remove the corresponding granular oxides and avoid injecting the oxide impurities mixed in it into the flexible hose 100.

[0051] As a feasible embodiment, the filtering syringe 400 may include a syringe body 410 and a needle 420, wherein the inlet end of the needle 420 is connected to the outlet end of the syringe body 410; wherein, the filter layer 430 can be used to remove impurities and filter the oxides in the liquid metal, for example, the filter layer 430 can be made of non-woven fabric; the filter layer 430 can be pressed against the outlet end of the syringe by the inlet end of the needle 420, which is convenient for the installation and replacement of the filter layer 430; when the filtering syringe 400 injects liquid metal into the capillary 200 in the preparation device, the filter layer 430 filters the oxides to prevent the needle 420 from being blocked, so as to ensure that the liquid metal can be smoothly injected into the flexible hose 100.

[0052] In addition, the filter syringe 400 can be installed on the injection pump so that the injection speed of the liquid metal can be easily adjusted and controlled, so that the filter syringe 400 can stably and evenly inject the liquid metal into the flexible hose 100; and the flexible long wire is long and the inner diameter of the flexible hose 100 is small, so using the injection pump to drive the filter syringe 400 to inject the liquid metal can reduce the difficulty of injecting the liquid metal and reduce the workload of the operator.

[0053] Based on the same inventive concept, a method for preparing a flexible long wire based on liquid metal includes:

[0054] Step S100, bending both ends of the flexible hose 100 upward;

[0055] In this step, the ends of the flexible hose 100 are arranged upward to form a height difference between the ends of the flexible hose 100 and its body, thereby forming a communicating vessel structure to ensure that the alkaline solution does not flow out from the ends of the flexible hose 100 after being injected into the flexible hose 100.

[0056] Step S200 , injecting an alkaline solution into the first capillary tube 200 a connected to the flexible hose 100 , so that the alkaline solution fills the interior of the flexible hose 100 ;

[0057] In this step, an alkaline solution is injected into the flexible hose 100 through the filter syringe 400, so that the alkaline solution is gradually injected into the flexible hose 100 through the first capillary 200a, which can remove the air in the flexible hose 100 in advance and avoid the residual air in the flexible hose 100 before preparation affecting the quality of the flexible long wire.

[0058] Step S300: injecting liquid metal into the first capillary tube 200a connected to the flexible hose 100, and placing the flexible hose 100, the first capillary tube 200a, and the second capillary tube 200b horizontally until the liquid metal flows out of the second capillary tube 200b;

[0059] In this step, liquid metal is injected into the first capillary 200a using a filter syringe 400, so that the liquid metal enters the flexible hose 100 through the first capillary 200a; by placing the flexible hose 100, the first capillary 200a and the second capillary 200b horizontally, the liquid metal can flow smoothly in the flexible hose 100; during the flow process, the liquid metal will continuously discharge the alkaline solution in the flexible hose 100 until it passes through the entire preparation device and flows out from the second capillary 200b.

[0060] Step S400: Sequentially seal the second capillary 200b and the first capillary 200a to obtain a flexible long wire.

[0061] In this step, by sealing the second capillary 200b and the first capillary 200a in sequence, both ends of the flexible hose 100 can be sealed to prevent external air from entering the flexible hose 100 from the ends and causing oxidation interference to the liquid metal, thereby ensuring the quality of the flexible long wire.

[0062] By bending the two ends of the flexible hose 100 upward so that a height difference is formed between the two ends of the flexible hose 100 and its tube body, the alkaline solution is injected into the flexible hose 100 through the first capillary 200a using the filter syringe 400 so that the alkaline solution fills the entire flexible hose 100, thereby expelling the air inside the preparation device and reducing the interference of the air on the liquid metal; the filter syringe 400 is then used to draw the liquid metal into the interior thereof, and the first capillary 200a and the filter syringe 400 are connected by a soft rubber tube. Since air is easily drawn into the syringe when the liquid metal is transferred to the filter syringe 400, it is necessary to expel the air inside the filter syringe 400 and squeeze out part of the liquid metal before connecting the preparation device to reduce the influence of the air inside the filter syringe 400; in order to allow the liquid metal to flow smoothly in the flexible hose 100, the flexible hose 100, the first capillary 200a and the second capillary 200b are placed horizontally. Since the inner diameter of the flexible hose 100 is small and one end thereof is isolated from the external environment, the alkaline solution will not flow out of the second capillary 200b at this time; the liquid metal is slowly injected into the first capillary 200a by the filter syringe 400, so that the liquid metal gradually flows into the flexible hose 100. Since the flexible hose 100 is filled with alkaline solution, the liquid metal will displace the alkaline solution inside the flexible hose 100, causing the alkaline solution to flow out of the second capillary 200b; as the liquid metal is continuously injected, the alkaline solution is continuously discharged from the second capillary 200b until the liquid metal passes through the entire preparation device and flows out of the second capillary 200b; at this time, the second capillary 200b is first closed, and liquid metal is continuously injected. After the preparation of the flexible long wire is completed, the first capillary 200a is closed to prevent leakage of the liquid metal and to prevent its ends from being oxidized by the external air, thereby obtaining a liquid metal flexible long wire of better quality. For details, please refer to Figure 5 .

[0063] It should be noted that the capillary 200 may include a first capillary 200a and a second capillary 200b respectively inserted at both ends of the flexible hose 100, and the first capillary 200a and the second capillary 200b are arranged opposite to each other; wherein, the first capillary 200a and the second capillary 200b can be made of copper material so that the two ends of the flexible long wire can be sealed later by bending or flattening; in addition, the alkaline solution in this application can use 0.1mol / L NaOH solution or KOH solution, and its concentration can be 0.1mol / L or 0.2mol / L, which can discharge the air inside the preparation device in advance to avoid oxidative interference to the injected liquid metal; and in the preparation process of the flexible long wire, when the alkaline solution flows in the flexible hose 100, a residual layer will be formed on the inner wall of the flexible hose 100. If the surface of the liquid metal is oxidized, the residual alkaline solution layer can remove the generated oxide layer, further reduce the generation of oxides, and improve the surface quality of the flexible long wire.

[0064] In some embodiments, bending both ends of the flexible hose 100 upwards, prior to:

[0065] Step S101: insert the first capillary tube 200a and the second capillary tube 200b into the two ends of the flexible hose 100 respectively;

[0066] In this step, since the flexible hose 100 has a certain elasticity, the first capillary tube 200 a and the second capillary tube 200 b can be respectively inserted into the ends of the flexible hose 100 so as to be fixedly connected to the flexible hose 100 .

[0067] Step S102: Wrap the sealing coil 310 in a spiral shape around the connection between the flexible hose 100 and the first capillary tube 200a, and the connection between the flexible hose 100 and the second capillary tube 200b, and weld the sealing coil 310 to the first capillary tube 200a and the second capillary tube 200b, respectively, to form corresponding welding parts 320.

[0068] In this step, the sealing coil 310 is spirally wound around the connection points between the flexible hose 100 and the first capillary tube 200a, and the flexible hose 100 and the second capillary tube 200b, thereby tightening the ends of the flexible hose 100 to the first capillary tube 200a and the second capillary tube 200b, respectively, to prevent air from entering the flexible hose 100 through the gap between the two, thereby achieving a certain sealing effect. To improve the sealing of the connection points, the sealing coil 310 is welded to the first capillary tube 200a and the second capillary tube 200b, respectively. The welding part 320 further seals the connection points and also prevents the sealing coil 310 from loosening. For details, please refer to Figure 6.

[0069] In some embodiments, bending both ends of the flexible hose 100 upward includes: tilting the free ends of the first capillary tube 200a and the second capillary tube 200b upward, and setting the height of the first capillary tube 200a away from the end of the flexible hose 100 to be less than or equal to the height of the second capillary tube 200b away from the end of the flexible hose 100.

[0070] It should be noted that since the two ends of the flexible hose 100 are bent upward to form a communicating vessel structure, when the alkaline solution is injected into the interior of the preparation device, the liquid columns at both ends always maintain the same height. In order to ensure that the interior of the flexible hose 100 and the interior of the first capillary 200a are filled with alkaline solution, the height of the end of the first capillary 200a away from the flexible hose 100 is less than or equal to the height of the end of the second capillary 200b away from the flexible hose 100, so that the first capillary 200a can be filled with alkaline solution, so that when the liquid metal is injected into the first capillary 200a, it can directly contact the end of the alkaline solution liquid column, thereby avoiding oxidation due to air being mixed between the two.

[0071] In some embodiments, an alkaline solution is injected into the first capillary 200a connected to the flexible hose 100, which previously includes: mixing a color indicator into the alkaline solution; after the liquid metal is injected into the preparation device, the fluidity of the liquid metal is used to fill the flexible hose 100 in the preparation device. As the liquid metal is continuously injected, the alkaline solution in the flexible hose 100 will be continuously discharged; therefore, by mixing the color indicator into the alkaline solution, the injection situation and flow position of the liquid metal can be observed; for example, the display indicator can be a phenolphthalein solution, which can make the alkaline solution red, which is convenient for connecting the injection speed and injection position of the liquid metal, and also convenient for observing the content of the alkaline solution in the flexible hose 100.

[0072] In some embodiments, injecting liquid metal into the first capillary 200a connected to the flexible hose 100 includes: setting the injection speed of the liquid metal to 0.075ml / s-0.5ml / s; slowly injecting the liquid metal into the flexible hose 100 through the filter syringe 400 so that the liquid metal flows in the flexible hose 100 in a laminar flow manner, ensuring that the liquid metal can flow through the interior of the entire flexible hose 100 and ensuring that the flexible long wire has good continuity; for example, according to actual preparation requirements, the injection speed of the liquid metal can be selected from any one of 0.075ml / s, 0.1ml / s, 0.25ml / s, 0.35ml / s, 0.4ml / s or 0.5ml / s.

[0073] In some embodiments, the second capillary tube 200b and the first capillary tube 200a are sequentially sealed, comprising:

[0074] Step S401: close the second capillary 200b and continue to inject liquid metal into the capillary 200 through the first capillary 200a;

[0075] In this step, after the liquid metal injected into the flexible hose 100 flows out from the second capillary 200b, it means that the liquid metal has penetrated the entire flexible hose 100. In order to prevent the liquid metal at the end of the second capillary 200b from being oxidized by the air and to ensure the quality of the flexible long wire, the second capillary 200b needs to be sealed. Among them, the liquid metal can be allowed to flow out for a certain distance before the second capillary 200b is sealed to remove the oxidized part of the end and improve the quality of the end of the flexible long wire.

[0076] Step S402 : When the liquid metal injected into the flexible hose 100 overflows from the first capillary tube 200 a , the injection is stopped and the first capillary tube 200 a is closed.

[0077] In this step, after closing the second capillary 200b, liquid metal is continuously injected into the first capillary 200a so that the liquid metal can fully fill the interior of the entire flexible hose 100, ensuring that the liquid metal has good continuity. Due to the elastic force of the flexible hose 100 itself, the flexible hose 100 has a maximum holding capacity. When the maximum holding capacity is exceeded, the elastic force of the flexible hose 100 cannot accommodate the liquid metal, so that the liquid metal overflows from the injection end of the first capillary 200a. At this time, it means that the liquid metal has filled the entire flexible hose 100. At this time, the first capillary 200a is closed to prevent air from causing oxidation interference to the liquid metal at the end of the first capillary 200a, and also to prevent leakage of the liquid metal inside the flexible hose 100.

[0078] It should be noted that by sealing the second capillary tube 200b, it has better sealing performance, preventing air from causing oxidation interference to the end of the flexible long wire, ensuring the quality of the end of the flexible long wire, so that the liquid metal can be continuously injected into the flexible hose 100; since the maximum capacity of the flexible hose 100 is limited, when the liquid metal overflows from the injection end of the first capillary tube 200a, by sealing the first capillary tube 200a, it is possible to prevent the liquid metal from leaking out and also prevent the liquid metal at the end of the first capillary tube 200a from being oxidized. For details, please refer to Figure 7 .

[0079] As a feasible embodiment, in order to facilitate the connection between the first capillary 200a and the filter syringe 400, a soft rubber tube can be used to connect the first capillary 200a and the needle 420 of the filter syringe 400 so that liquid metal or alkaline solution can be injected into the preparation device; when the liquid metal in the flexible hose 100 reaches the maximum capacity, the flexible hose 100 cannot accommodate more liquid metal, so the liquid metal will overflow from the injection end of the first capillary 200a; and when the liquid metal gradually fills the needle 420 and the soft rubber tube, due to the high pressure of the liquid metal inside the flexible hose 100 and the soft rubber tube, the connection between the syringe body 410 and the needle 420 is relatively weak, and the liquid metal will overflow at the connection between the syringe body 410 and the needle 420 for the operator to observe and confirm; therefore, this phenomenon can be used as a sign that the flexible hose 100 has reached the maximum capacity, and the first capillary 200a should be closed at this time.

[0080] In some embodiments, continuously injecting liquid metal into the capillary 200 through the first capillary 200a includes: the injection amount of liquid metal after closing the second capillary 200b is 0.5 times to 1 times the amount of liquid metal before closing the second capillary 200b.

[0081] It should be noted that when the liquid metal flows out of the second capillary 200b, it means that the liquid metal has penetrated the entire flexible hose 100. Since the flexible hose 100 is in a horizontal position and has a certain elasticity, in order to make the liquid metal fully fill the entire flexible hose 100 and ensure that a continuous flexible long wire is formed inside it, after closing the second capillary 200b, it is necessary to continue to inject liquid metal into the flexible hose 100. Since the flexible hose 100 has elasticity, it can continue to accommodate a certain amount of liquid metal so that the liquid metal in each area of ​​the flexible hose 100 is evenly distributed and forms corresponding flexible wires; in order to ensure the overall uniformity and continuity of the formed flexible long wire, after closing the second capillary 200b, 0.5-1 times of the injected amount, such as 0.5 times, 0.75 times or 1 times, can continue to be injected into the flexible hose 100 to ensure the quality of the formed flexible long wire.

[0082] In some embodiments, the second capillary tube 200b and the first capillary tube 200a are closed in sequence, further comprising: closing the second capillary tube 200b and the first capillary tube 200a by flattening or bending;

[0083] It should be noted that in order to seal the two ends of the first capillary 200a and the second capillary 200b, the first capillary 200a and the second capillary 200b can be sealed by flattening or bending. This sealing method is simple to operate and has good sealing effect. As one of the feasible embodiments, taking the first capillary 200a and the second capillary 200b as an example of using copper capillary 200, when sealing the second capillary 200b and the first capillary 200a, the first capillary 200a and the second capillary 200b can be bent or flattened with pliers to close the ports of the first capillary 200a and the second capillary 200b to achieve a sealing effect. At this time, the two ends of the flexible long wire are isolated from the external environment to prevent the two ends of the flexible long wire from being oxidized by air.

[0084] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the above embodiments or technical features in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of simplicity.

[0085] The embodiments of the present application are intended to encompass all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A device for preparing a flexible long wire based on liquid metal, characterized in that: The hose is connected to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The hose is connected to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The connection is tightened to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The connection is tightened to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The connection is tightened to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The connection is tightened to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The connection is tightened to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The connection is tightened to the capillary tube by a threaded connection, and the connection is tightened to the capillary tube by a threaded connection. The preparation method of a flexible long wire of liquid metal is as follows: bending both ends of the flexible hose upward so that the flexible hose forms a communicating vessel structure; injecting an alkaline solution into the first capillary connected to the flexible hose so that the alkaline solution fills the interior of the flexible hose; injecting liquid metal into the first capillary connected to the flexible hose, placing the flexible hose, the first capillary and the second capillary horizontally until the liquid metal flows out of the second capillary; when the liquid metal in the flexible hose flows out from the end of the second capillary, closing the second capillary and continuing to inject liquid metal into the capillary through the first capillary; and when the liquid metal injected into the flexible hose overflows from the first capillary, stopping the injection and closing the first capillary to obtain a flexible long wire.

2. The device for preparing a flexible long wire based on liquid metal according to claim 1, characterized in that: The inlet end of the preparation device is connected to a filter syringe, and a filter layer is provided in the filter syringe. The filter layer is used to filter oxides in the liquid metal inside the syringe.

3. The device for preparing a flexible long wire based on liquid metal according to claim 1, characterized in that: The step of bending both ends of the flexible hose upwards comprises: inserting the first capillary tube and the second capillary tube into both ends of the flexible hose respectively; A sealing coil is spirally wound around the connection between the flexible hose and the first capillary tube, and the connection between the flexible hose and the second capillary tube, and the sealing coil is welded to the first capillary tube and the second capillary tube respectively to form corresponding welding parts.

4. The device for preparing a flexible long wire based on liquid metal according to claim 1, characterized in that: The step of injecting an alkaline solution into the first capillary tube connected to the flexible hose includes: mixing a color indicator into the alkaline solution.

5. The device for preparing a flexible long wire based on liquid metal according to claim 4, characterized in that: The step of injecting liquid metal into the first capillary tube connected to the flexible hose comprises: The injection speed of liquid metal is set to 0.075ml / s-0.5ml / s.

6. The device for preparing a flexible long wire based on liquid metal according to claim 5, characterized in that: The second capillary and the first capillary are sealed by flattening or bending.

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