Bubble electrospinning device

Abstract

The present application provides a bubble electrostatic spinning device, comprising: a liquid storage tank, a high-voltage electrostatic generator and a cathode receiving mechanism, wherein the liquid storage tank is connected to a foaming mechanism, wherein the foaming mechanism blows gas into the liquid storage tank to form bubbles in the spinning solution, wherein the bubbles rise to the surface of the spinning solution due to buoyancy and then burst to generate jets, wherein the jets are drawn into filaments under the action of the electrostatic field of the high-voltage electrostatic generator, thereby allowing the filaments to be received on the cathode receiving mechanism, and wherein the electrostatic spinning mechanism further comprises an air blowing mechanism arranged around the liquid storage tank, wherein the air blowing mechanism blows out an air flow to concentrate the jets toward the electrostatic field, thereby avoiding the phenomenon of the jets splashing around after the bubbles burst.

Description

[Technical field]

[0001] The present application relates to the field of spinning, and in particular to a bubble electrostatic spinning device. [Background technology]

[0002] Bubble electrospinning can achieve mass production of nanofibers to a certain extent. However, there are still some problems in the spinning process, because the circular nozzle is easy to splash around during the spinning process, which not only wastes raw materials but also causes uneven and unconcentrated fiber collection.

[0003] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art.

[0004]

Application Contents

[0005] The purpose of the present application is to provide a bubble electrospinning device which can prevent the splashing of spinning solution during the bubble electrospinning process.

[0006] The purpose of the present application is achieved through the following technical solutions: a bubble electrostatic spinning device, comprising: a liquid storage tank, a high-voltage electrostatic generator and a cathode receiving mechanism, the liquid storage tank is connected to a foaming mechanism, the foaming mechanism blows gas into the liquid storage tank to form bubbles in the spinning solution, the bubbles rise to the surface of the spinning solution through buoyancy and then burst to produce jets, the jets are drawn into filaments under the action of the electrostatic field of the high-voltage electrostatic generator, so that the filaments are received on the cathode receiving mechanism.

[0007] The electrostatic spinning mechanism further comprises an air blowing mechanism arranged around the outer periphery of the liquid storage tank, and the air blowing mechanism blows out an air flow to make the jet flow concentrate toward the electrostatic field.

[0008] Furthermore, the blowing mechanism includes an annular air nozzle, and an annular air outlet channel is arranged inside the air nozzle, and the air outlet channel is inclined inwardly along the direction of the liquid storage tank pointing to the negative electrode receiving mechanism.

[0009] Furthermore, the air nozzle has an air outlet, and the air outlet is arranged close to the liquid storage tank port.

[0010] Furthermore, the air nozzle and the liquid storage tank are interference fit.

[0011] Furthermore, the air nozzle has an air outlet, and the air outlet is inclined outward along the axial direction.

[0012] Furthermore, a spinning plate covering the port is arranged at the top of the liquid storage tank, a through hole is arranged on the spinning plate, and a tip portion protruding outward along the inner wall of the through hole is arranged in the through hole.

[0013] Furthermore, the bubble electrospinning device also includes a liquid replenishing mechanism for replenishing the liquid storage tank with spinning liquid.

[0014] Compared with the prior art, the present application has the following beneficial effects: by providing an air blowing mechanism arranged around the periphery of the liquid storage tank, the air flow blown out by the air blowing mechanism makes the jet concentrate on the electrostatic field, thereby avoiding the phenomenon of the jet splashing around after the bubble bursts.

Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the structure of this application.

[0016] Figure 2 It is a top view of part of the structure of this application. [Specific implementation method]

[0017] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0018] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0020] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. In the description of the present application, the axis direction is consistent with the height direction.

[0021] See also Figure 1 and Figure 2The present application provides a bubble electrospinning device 100, which can be used to make nanofibers. The bubble electrospinning device 100 includes a liquid storage tank 1, a high-voltage electrostatic generator 2 and a cathode receiving mechanism 3. The liquid storage tank 1 is connected to a foaming mechanism 4. The foaming mechanism 4 blows gas into the liquid storage tank 1 to form bubbles in the spinning solution. The bubbles rise to the surface of the spinning solution through buoyancy and then burst to produce jets. The jets are drawn into filaments under the action of the electrostatic field of the high-voltage electrostatic generator 2, so that the filaments are received on the cathode receiving mechanism 3.

[0022] In this embodiment, the liquid reservoir 1 is set to be cylindrical, with a cavity inside and an opening at the top, and the spinning solution is set in the cavity. The foaming mechanism 4 is connected to the cavity through a conduit 41. Preferably, the conduit 41 passes through the bottom center of the liquid reservoir 1 and is connected to the cavity, so that when the foaming mechanism 4 blows gas into the spinning solution and generates bubbles, the bubbles can be evenly distributed on the liquid surface after floating, so that the obtained fibers are more uniform. The bubble electrostatic spinning device 100 also includes a liquid replenishing mechanism 5 for replenishing the spinning solution for the liquid reservoir 1 to ensure that the spinning solution in the liquid reservoir 1 is sufficient. The negative electrode receiving mechanism 3 is arranged above the liquid reservoir 1. The positive and negative electrodes of the high-voltage electrostatic generator 2 are connected to the liquid reservoir 1 and the negative electrode receiving mechanism 3 respectively, and an electrostatic field is formed between the liquid reservoir 1 and the negative electrode receiving mechanism 3. When the bubbles suspended on the spinning solution burst, a number of jets are formed that sputter to the surroundings, and the jets are stretched under the action of the electrostatic field to form nanofibers. In this embodiment, the negative electrode receiving mechanism 3 is configured to be cylindrical, and the negative electrode receiving mechanism 3 can be driven by a motor to rotate when receiving the nanofibers, thereby facilitating the one-step production of the nano yarn. Of course, in other embodiments, the negative electrode receiving mechanism 3 can also be configured to be a flat plate or other forms, which are not specifically limited here.

[0023] In order to facilitate the breaking of bubbles and increase the spinning speed, a spinning plate 11 covering the opening is provided at the top opening of the liquid storage tank 1. A plurality of through holes 111 are provided on the spinning plate 11 to facilitate the emergence of bubbles. A tip portion 112 protruding outward along the inner wall of the through hole 111 is provided in the through hole 111. When the bubble emerges outward along the through hole 111, the bubble will touch the tip portion 112 to cause the bubble to burst. In this embodiment, the spinning plate 11 is set to be circular, which just covers the opening of the liquid storage tank 1. The through hole 111 can be set to a flat rectangular shape with a length of 0.1-5 cm and a width of 0-1 mm. The shape of the through hole 111 can preliminarily control the splashing of the jet generated after the bubble bursts. Of course, in other embodiments, the through hole 111 can also be set to other shapes, which are not specifically limited here.

[0024] In order to further prevent the jet generated after the bubble bursts from splashing around, the bubble electrostatic spinning mechanism 100 also includes a blowing mechanism 6 arranged around the periphery of the liquid storage tank 1. The blowing mechanism 6 blows out an airflow to concentrate the jet toward the electrostatic field to prevent the jet from splashing around, causing the spinning nanofibers to be unconcentrated and the spinning solution to be wasted. At the same time, the blown airflow can further stretch the jet and improve the fineness of the fiber. The blowing mechanism 6 includes an airflow generating component 61 for generating an airflow and a tuyere 62 arranged around the periphery of the liquid storage tank 1. The airflow generating component 61 and the tuyere 62 are connected through a hollow tube 63, so that the gas generated by the airflow generating component 61 flows into the tuyere 62 through the hollow tube 63. In this embodiment, the air nozzle 62 is set in an annular shape, and an annular air outlet channel 621 is set in the air nozzle 62. The air outlet channel 621 is tilted inward along the direction from the liquid reservoir 1 to the negative electrode receiving mechanism 3, so that the airflow flowing out through the air outlet channel 621 is blown out obliquely upward and from the outside to the inside, providing an oblique upward force from the outside of the electrostatic field to the inside of the electrostatic field for the jet splashing outside the electrostatic field. In order to facilitate the wind force to better guide the jet splashing outside the electrostatic field into the electrostatic field, the air nozzle 62 has an air outlet 622, and the air outlet 622 is tilted outward along the axial direction. In order to prevent a wind blind area between the liquid reservoir 1 and the air nozzle 62, the air outlet 622 is set close to the port of the liquid reservoir 1. Preferably, the air outlet 622 is arranged around the liquid reservoir 1 and is in close contact with the port of the liquid reservoir 1. To simplify the structure and facilitate the fixation of the air nozzle 62, the air nozzle 62 is set in the liquid storage tank 1 for interference fit, so as to further improve the matching effect between the air nozzle 62 and the liquid storage tank 1. Of course, in other embodiments, the air nozzle 62 and the liquid storage tank 1 can also be connected by other means, which are not specifically limited here.

[0025] The above is only a specific implementation of the present application, and any other improvements made based on the concept of the present application are deemed to be within the protection scope of the present application.

Claims

1. A bubble electrospinning device, characterized in that: include: A liquid storage tank, a high-voltage electrostatic generator and a cathode receiving mechanism, wherein the liquid storage tank is connected to a foaming mechanism, wherein the foaming mechanism blows gas into the liquid storage tank to form bubbles in the spinning solution, wherein the bubbles rise to the surface of the spinning solution by buoyancy and then burst to generate jets, wherein the jets are drawn into filaments under the action of the electrostatic field of the high-voltage electrostatic generator, so that the filaments are received on the cathode receiving mechanism; The bubble electrostatic spinning device further comprises an air blowing mechanism arranged around the outer periphery of the liquid storage tank, wherein the air blowing mechanism blows out an air flow to make the jet flow concentrate toward the electrostatic field; The top of the liquid storage tank is provided with a spinning plate covering its port, and the spinning plate is provided with a plurality of through holes for bubbles to pass through, and each through hole is provided with a tip portion protruding outward along its inner wall, so that the bubbles entering the through hole touch and rupture with the tip portion to form spinning; The blowing mechanism comprises an annular air nozzle, an annular air outlet channel is arranged in the air nozzle, and the air outlet channel is inclined inwardly in a direction from the liquid storage tank to the negative electrode receiving mechanism.

2. The bubble electrospinning device according to claim 1, characterized in that: The air nozzle has an air outlet, and the air outlet is arranged close to the liquid storage tank port.

3. The bubble electrospinning device according to claim 1, characterized in that: The air nozzle is interference fit with the liquid storage tank.

4. The bubble electrospinning device according to claim 1, characterized in that: The air nozzle has an air outlet, and the air outlet is inclined outward along the axis direction.

5. The bubble electrospinning device according to claim 1, characterized in that: The bubble electrostatic spinning device also includes a liquid replenishing mechanism for replenishing the liquid storage tank with spinning liquid.

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