Scale-Type Bubble Spinning Device and Method

Abstract

The present invention discloses a scale-type bubble spinning device and method. The spinning device includes: a liquid supply unit; a gas supply unit; a foaming unit; and a receiving unit. On the one hand, the present invention uses an air flow field passing through the main pipe and the branch pipes to replace the electrostatic field formed by a high-voltage power supply, making the preparation process simpler and safer, achieving green production, conforming to the environmental protection concept. At the same time, under the pressure of the internal air flow field, the injection port can always be kept unblocked, avoiding blockage, and effectively improving the preparation efficiency. On the other hand, it can be flexibly switched between the preparation of nanofiber membranes and nanofiber tubes, with rich functions, effectively improving the practicability of the spinning device.

Description

Technical Field

[0001] The present invention belongs to the technical field of spinning, and particularly relates to a scale-type bubble spinning device. At the same time, the present invention also relates to a bubble spinning method. Background Art

[0002] Nanofibers are widely used in fields such as filtration, personal protection, sensors, catalysts, military, aerospace, etc. In the preparation of nanofibers, due to the simple operation of the electrospinning preparation method and the advantages of the prepared fibers such as light weight, good air permeability, and large specific surface area, the electrospinning method is currently the most commonly used way to prepare nanoscale fibers.

[0003] Traditional nanofiber electrospinning devices mainly include a syringe, a high-voltage power supply, and a receiver. Among them, a jet is ejected through a syringe filled with a spinning solution, and the jet is stretched and refined into nanofiber filaments in a high-voltage electric field, and finally the nanofiber filaments are wound up by a collector.

[0004] However, in the actual preparation process, there are the following defects:

[0005] 1. During the preparation process, it is necessary to maintain a high-voltage electric field at the injection port of the syringe, which poses a certain safety hazard and has high energy consumption, and is not conducive to the implementation of the environmental protection concept;

[0006] 2. Affected by the properties of the solution such as concentration and viscosity, the syringe needle is easily blocked during spinning and needs to be frequently cleaned manually, which affects the preparation efficiency;

[0007] 3. It can only prepare nanofibers in a single form. For example, the same spinning device can only spin out a nanofiber membrane or can only spin out a nanofiber tube. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a brand-new scale-type bubble spinning device.

[0009] At the same time, the present invention also provides a bubble spinning method.

[0010] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0011] A scale - type bubble spinning device, which includes: a liquid supply unit, which includes a liquid storage tank and a liquid supply pipeline; a gas supply unit, which includes an air pump and a gas supply pipeline; a foaming unit, which includes a horizontal frame plate, a plurality of foaming scales arranged on the frame plate and all capable of turning up and down, and a controller for controlling the turning angles of the plurality of foaming scales, wherein the plurality of foaming scales are divided into multiple layers from the inside to the outside, and the plurality of foaming scales in each layer are annularly distributed; a main pipe connected to the liquid supply pipeline and the gas supply pipeline is arranged in each foaming scale, and a plurality of branch pipes connected to the main pipe are arranged in each foaming scale. An inlet connected to the main pipe and a plurality of injection ports corresponding to the plurality of branch pipes one - to - one are further formed on each foaming scale. The spinning solution and the air flow enter each branch pipe dispersedly along the main pipe from the inlet. Among them, the air flow forms an air flow field penetrating the main pipe and the branch pipes and forms bubbles in the spinning solution. Under the stretching and breaking of the bubbles by the air flow field, spinning solution jets are respectively formed at the plurality of injection ports, and the plurality of jets ejected by the plurality of foaming scales constitute an ejection area; a receiving unit, which includes a receiving flat plate and a receiving pipe, wherein the receiving flat plate is parallelly arranged above the frame plate; the receiving pipe is rotatably connected to the frame plate and is located within the ring formed by the plurality of foaming scales in the innermost layer. As the plurality of foaming scales turn up and down, the ejection area moves between the bottom surface of the receiving flat plate and the circumferential surface of the receiving pipe to respectively form a nanofiber membrane and a nanofiber tube.

[0012] Preferably, the plurality of foaming scales in each layer are arranged in a circumferential array; and / or, the number of foaming scales increases layer by layer from the inside to the outside. In principle, the maximum number of foaming scales is taken under the condition of filling the circumference to the maximum extent in each layer. Herein, it is beneficial to the uniform wall thickness of the prepared nanofiber membrane and nanofiber tube.

[0013] Preferably, each foaming scale is bent in the length direction of the main pipe; and / or, the turning angle of each foaming scale relative to the frame plate is 0° - 90°. Herein, through the bending design of a single foaming scale, the back - flow of the spinning solution can be effectively avoided when spinning is completed or temporarily stopped.

[0014] Preferably, each foaming scale includes a first split body and a second split body, wherein the first split body is triangular and is rotatably connected to the frame plate through a pivot, the second split body is fan - shaped, the inlet is located at the vertex angle of the first split body far from the second split body, and the plurality of injection ports are spaced along the arc edge of the second split body.

[0015] Preferably, the main pipe is divided into multiple levels along its own length direction, wherein the inner diameter of the main pipe gradually becomes narrower along its own length direction from the inlet; at least two main pipes are connected to each level of the main pipe. Herein, similar to the vein - like design, it is beneficial to the smooth flow of the spinning solution in the main pipe and each branch pipe; at the same time, the independence of each jet can be maintained, the mutual influence can be reduced, and the spinning quality can be improved. In addition, through the gradually narrowing inner diameter of the main pipe, the conveying pressure of the spinning solution in the main pipe can be gradually increased.

[0016] Specifically, the branch pipes connected to each level of the main pipe are symmetrically arranged with respect to the center line of the main pipe.

[0017] Preferably, the rack plate is arranged above the liquid storage tank, and in the orthographic projection in the vertical direction, the rack plate covers the liquid storage tank. Here, it plays a role in covering the liquid storage tank, and can significantly reduce the loss caused by the evaporation of the spinning solution solvent during large-scale preparation, saving raw materials.

[0018] Preferably, the air supply pipeline is located inside the liquid supply pipeline, and supplies the spinning solution and air flow to the main pipe synchronously. Here, it is beneficial for the air flow to quickly form uniform bubbles in the spinning solution.

[0019] Preferably, the center lines of the ring formed by the receiving plate, the receiving pipe, and the multiple foaming scales coincide.

[0020] Another technical solution of the present invention is a bubble spinning method, which uses the above-mentioned scale-type bubble spinning device and includes the following steps:

[0021] S1. Prepare a nanofiber membrane

[0022] a) Control the flipping angles of the multiple foaming scales through the controller so that the spraying area is located on the bottom surface of the receiving plate;

[0023] b) Supply the spinning solution and air flow to the main pipe through the liquid supply pipeline and the air supply pipeline. The air flow forms bubbles in the spinning solution and is dispersed into each branch pipe with the spinning solution. Among them, through the stretching of the air flow field, the bubbles burst and the spinning solution in each branch pipe sprays out from the spraying port to form a jet, and the jet sprays onto the bottom surface of the receiving plate to form a nanofiber membrane;

[0024] S2. Prepare a nanofiber tube

[0025] Control the flipping angles of the multiple foaming scales through the controller so that the spraying area is located on the circumferential surface of the receiving pipe; then, keep the receiving pipe rotating continuously, and finally repeat step b) in S1 to form a nanofiber tube on the circumferential surface of the receiving pipe.

[0026] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0027] The existing nanofiber electrospinning device has defects such as safety hazards caused by high-voltage electric fields, high energy consumption, easy blockage of syringe needles, and single product preparation. The bubble spinning device of the present invention has been designed entirely anew and ingeniously solves various deficiencies of the existing structure. By adopting this device, by adjusting the angle of the foaming scales, the formed spraying area is moved to the receiving plate or receiving tube, and then the spinning solution for forming bubbles is supplied into the main pipe through the air supply pipeline and the liquid supply pipeline and dispersed into each branch pipe. Under the rupture of the bubbles, spinning solution jets are respectively formed at multiple spraying ports to form a nanofiber membrane or nanofiber tube on the receiving plate or receiving tube. Therefore, compared with the existing structure, on the one hand, the present invention uses an air flow field penetrating the main pipe and branch pipes to replace the electrostatic field formed by a high-voltage power supply, the preparation process is simpler and safer, realizing green production and conforming to the environmental protection concept. At the same time, under the pressure of the internal air flow field, the spraying ports can always be kept unblocked, avoiding blockage and effectively improving the preparation efficiency; on the other hand, it can be flexibly switched between preparing nanofiber membranes and nanofiber tubes, with rich preparation functions and effectively improving the practicability of the spinning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. is a front view schematic diagram of the scale-type bubble spinning device of the present invention (for preparing nanofiber membranes);

[0029] Figure 2 FIG. is a front view schematic diagram of the scale-type bubble spinning device of the present invention (for preparing nanofiber tubes);

[0030] Figure 3 is Figure 1 a top view schematic diagram of the foaming unit in;

[0031] Figure 4 is Figure 3 a magnified schematic diagram of the structure of a single foaming scale in;

[0032] Figure 5 is Figure 4 a sectional view taken along the A-A direction in;

[0033] Wherein: 1. Liquid supply unit; 10. Liquid storage tank; 11. Liquid supply pipeline; 12. Liquid infusion pump;

[0034] 2. Air supply unit; 20. Air supply pipeline; 21. Air pump;

[0035] 3. Foaming unit; 30. Frame plate; 31. Foaming scale; g0. Main pipe; g1. Branch pipe; 311. First split body; k1. Inlet; 312. Second split body; k2. Spraying port;

[0036] 4. Receiving unit; 40. Receiving plate; 41. Receiving tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying 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 thus should not be construed as a limitation to the present application.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0040] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0043] As Figures 1 to 5 shown, the scale-type bubble spinning device of this embodiment includes a liquid supply unit 1, a gas supply unit 2, a foaming unit 3, and a receiving unit 4.

[0044] Specifically, the liquid supply unit 1 includes a liquid storage tank 10, a liquid supply pipeline 11, and an infusion pump 12 connected to the liquid supply pipeline 11. The spinning solution is placed in the liquid storage tank 10, and the liquid supply pipeline 11 is used to draw and transport the spinning solution; the gas supply unit 2 includes a gas supply pipeline 20 and an air pump 21 connected to the gas supply pipeline 20; the foaming unit 3 includes a frame plate 30, a plurality of foaming scales 31 disposed on the frame plate 30 and capable of flipping up and down, and a controller for controlling the flipping angles of the plurality of foaming scales 31; the receiving unit 4 includes a receiving flat plate 40 and a receiving tube 41.

[0045] In some specific embodiments, the gas supply pipeline 20 is inserted inside the liquid supply pipeline 11 and extends along the length direction of the liquid supply pipeline 11. The gas supply pipeline 20 and the liquid supply pipeline 11 can supply air flow and spinning solution to each foaming scale 31 synchronously. The gas supply pipeline 20 and the liquid supply pipeline 11 can intersect, or can independently supply air flow and spinning solution to each foaming scale 31; the rack plate 30 is erected directly above the liquid storage tank 10, and in the vertical orthographic projection, the rack plate 30 covers the liquid storage tank 10; multiple foaming scales 31 are divided into multiple layers from the inside out. The multiple foaming scales 31 in each layer are arranged in a circumferential array, and the number of foaming scales 31 increases layer by layer from the inside out; each foaming scale 31 is provided with a main pipe g0 connected to the gas supply pipeline 20 and the liquid supply pipeline 11, and multiple branch pipes g1 connected to the main pipe g0. Each foaming scale 31 is also formed with an inlet k1 connected to the main pipe g0 and multiple injection ports k2 corresponding to and communicating with the multiple branch pipes g1 one by one. The spinning solution and the air flow are dispersed into each branch pipe g1 from the inlet along the main pipe g0 synchronously. Among them, the air flow forms an air flow field penetrating the main pipe g0 and the branch pipes g1 and forms bubbles in the spinning solution. Under the stretching and breaking of the air flow field on the bubbles, multiple injection ports k2 respectively form spinning solution jets, and the multiple jets ejected by the multiple foaming scales 31 constitute an injection area; the controller can be used to control all the foaming scales 31 to flip up and down synchronously, or can be used to control each foaming scale 31 to flip up and down independently, which can be specifically selected according to actual needs. Among them, the angle of each foaming scale 31 relative to the rack plate 30 can be 0° to 90°; the receiving flat plate 40 is arranged parallel above the rack plate 30; the receiving pipe 41 is rotatably connected to the rack plate 30 and is located inside the ring formed by the multiple foaming scales 31 in the innermost layer. Among them, the center lines of the receiving flat plate 40, the receiving pipe 41, and the ring formed by the multiple foaming scales 31 coincide. As the multiple foaming scales 31 move up and down, the injection area moves between the bottom surface of the receiving flat plate 40 and the circumferential surface of the receiving pipe 41 to respectively form a nanofiber membrane and a nanofiber tube. That is to say, when preparing the nanofiber membrane, it is necessary to adjust the angle of each foaming scale 31 relative to the rack plate 30 to 90°, and at this time the injection area is on the bottom surface of the receiving flat plate 40; when preparing the nanofiber tube, according to the diameter of the receiving pipe 41, it is necessary to select a suitable angle in the range of (0°, 90°) to adjust the angle of each foaming scale 31 relative to the rack plate 30 so that the injection area is on the circumferential surface of the receiving pipe 41.

[0046] To further facilitate the formation of the jet, the whole of each foaming scale 31 can be bent in the length direction of the main pipe g0 to prevent the spinning solution from flowing back when the spinning is completed or temporarily stopped; each foaming scale 31 includes a first split body 311 and a second split body 312, wherein the first split body 311 is triangular and is pivotally connected to the rack plate 30, the second split body 312 is fan-shaped, the inlet k1 is located at the vertex angle of the first split body 311 away from the second split body 312, and a plurality of injection ports k2 are distributed at intervals along the arc edge of the second split body 312; the main pipe g0 is divided into multiple levels along its own length direction, and the inner diameter of the main pipe g0 gradually becomes narrower along its own length direction from the inlet; at least two branch pipes g1 are connected to each level of the main pipe g0, and the branch pipes g1 connected to each level of the main pipe g0 are symmetrically arranged with respect to the center line of the main pipe g0. Specifically, the main pipe g0 has two levels, and one branch pipe g1 is connected to each side of the first-level main pipe g0 communicating with the inlet k1, and one branch pipe g1 is connected to each side and the end of the other-level main pipe g0 respectively.

[0047] Therefore, the spinning method of this embodiment includes the following steps:

[0048] S1. Prepare the nanofiber membrane

[0049] a) Control, through the controller, a plurality of foaming scales 31 to turn upwards to be perpendicular to the rack plate 30, so that the spraying area is located at the bottom surface of the receiving flat plate 40;

[0050] b) Supply the spinning solution and air flow to the main pipe g0 through the liquid supply pipeline 11 and the air supply pipeline 20. The air flow forms bubbles in the spinning solution and is dispersed with the spinning solution into each branch pipe g1. After being stretched by the air flow field, the bubbles burst and the spinning solution in each branch pipe g1 is ejected from the injection port k2 to form a jet, and the jet is sprayed onto the bottom surface of the receiving flat plate 40 to form a nanofiber membrane;

[0051] S2. Prepare the nanofiber tube

[0052] Control, through the controller, the turning angle of a plurality of foaming scales so that the spraying area is located on the circumferential surface of the receiving tube 41; then, keep the receiving tube 41 rotating continuously around its own center line, and finally repeat step b) in S1 to form a nanofiber tube on the circumferential surface of the receiving tube 41.

[0053] In summary, this embodiment has the following advantages:

[0054] 1. On the one hand, an air flow field that penetrates the main pipe and the branch pipes is used to replace the electrostatic field formed by a high-voltage power supply. The preparation process is simpler and safer, achieving green production, meeting the environmental protection concept. At the same time, under the pressure of the internal air flow field, the jet orifice can always be kept unobstructed, avoiding blockage, and effectively improving the preparation efficiency. On the other hand, it can be flexibly switched between the preparation of nanofiber membranes and nanofiber tubes, with rich functions, effectively improving the practicality of the spinning device.

[0055] 2. Through the bending design of a single foaming scale, the backflow of the spinning solution can be effectively avoided when the spinning is completed or temporarily stopped.

[0056] 3. Through the design similar to the vein shape between the main pipe and the branch pipes, it is beneficial to the smooth flow of the spinning solution in the main pipe and each branch pipe. At the same time, it can maintain the independence of each jet, reduce mutual influence, and improve the spinning quality. In addition, through the gradually narrowing inner diameter of the main pipe, the conveying pressure of the spinning solution in the main pipe can be gradually increased.

[0057] 4. Through the position layout between the rack plate and the liquid storage tank, it plays a role in covering the liquid storage tank, and can significantly reduce the loss caused by the evaporation of the solvent of the spinning solution during large-scale preparation, saving raw materials.

[0058] The above has made a detailed description of the present invention, aiming to enable those skilled in this field to understand the content of the present invention and implement it. However, it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A scale-type bubble spinning device, characterized in that, It includes: A liquid supply unit, which includes a liquid storage tank and a liquid supply pipeline; An air supply unit, which includes an air pump and an air supply pipeline; A foaming unit, which includes a horizontal rack plate, a plurality of foaming scales arranged on the rack plate and capable of flipping up and down, and a controller for controlling the flipping angles of the plurality of foaming scales. The plurality of foaming scales are divided into multiple layers from the inside out, and the plurality of foaming scales in each layer are annularly distributed; a main pipe connected to the liquid supply pipeline and the air supply pipeline is provided in each foaming scale, and a plurality of branch pipes connected to the main pipe are provided. An inlet connected to the main pipe and a plurality of injection ports corresponding to the plurality of branch pipes one by one are further formed on each foaming scale. The spinning solution and the air flow enter each branch pipe along the main pipe from the inlet. The air flow forms an air flow field penetrating the main pipe and the branch pipes and forms bubbles in the spinning solution. Under the stretching and bursting of the bubbles by the air flow field, spinning solution jets are respectively formed at the plurality of injection ports, and the plurality of jets ejected by the plurality of foaming scales constitute an injection area; A receiving unit, which includes a receiving flat plate and a receiving pipe. The receiving flat plate is arranged parallel above the rack plate; the receiving pipe is rotatably connected to the rack plate and is located within the ring formed by the plurality of foaming scales in the innermost layer. As the plurality of foaming scales flip up and down, the injection area moves between the bottom surface of the receiving flat plate and the circumferential surface of the receiving pipe to form a nanofiber membrane and a nanofiber tube respectively.

2. The scale-type bubble spinning device according to claim 1, characterized in that: The plurality of foaming scales in each layer are arranged in a circumferential array; and / or, the number of the foaming scales increases layer by layer from the inside out.

3. The scale-type bubble spinning device according to claim 1, wherein: Each foaming scale is bent in the length direction of the main pipe; and / or, the flipping angle of each foaming scale relative to the rack plate is 0° to 90°.

4. The scale type bubble spinning device according to claim 1, wherein: Each foaming scale includes a first split body and a second split body. The first split body is triangular and is rotatably connected to the rack plate through a pivot. The second split body is fan-shaped. The inlet is located at the top corner of the first split body away from the second split body, and the plurality of injection ports are spaced along the arc edge of the second split body.

5. The scale-type bubble spinning device according to claim 1, wherein: The main pipe is divided into multiple levels along its own length direction, and the inner diameter of the main pipe gradually narrows from the inlet along its own length direction; at least two main pipes are connected to each level of the main pipe.

6. The scale-type bubble spinning device according to claim 5, wherein: The branch pipes connected to each level of the main pipe are symmetrically arranged with respect to the center line of the main pipe.

7. The scale-type bubble spinning device according to claim 1, wherein: The rack plate is arranged above the liquid storage tank, and in the vertical orthographic projection, the rack plate covers the liquid storage tank.

8. The scale-type bubble spinning device according to claim 1, wherein: The air supply pipeline is located inside the liquid supply pipeline and supplies the spinning solution and the air flow to the main pipe synchronously.

9. The scale-type bubble spinning device according to claim 1, characterized in that: The center lines of the receiving flat plate, the receiving pipe, and the ring formed by the plurality of foaming scales coincide.

10. A bubble spinning method, characterized in that: It adopts the scale-type bubble spinning device according to any one of claims 1 to 9, and includes the following steps: S1. Prepare a nanofiber membrane a) Control the flipping angles of the plurality of foaming scales through a controller so that the injection area is located at the bottom surface of the receiving flat plate; b) Supply spinning solution and air flow to the main pipe through the liquid supply pipeline and the air supply pipeline. Bubbles are formed in the spinning solution by the air flow, and the spinning solution is dispersed with the air flow into each of the branch pipes. Through stretching in the air flow field, the bubbles burst and the spinning solution in each branch pipe is ejected from the ejection orifice to form a jet, and the jet is sprayed onto the bottom surface of the receiving plate to form a nanofiber membrane; S2. Prepare a nanofiber tube Control the flipping angles of the multiple foaming scales through a controller to make the ejection area located on the circumferential surface of the receiving tube; then, keep the receiving tube rotating continuously, and finally repeat step b) in S1 to form a nanofiber tube on the circumferential surface of the receiving tube.

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