Electrostatic spinning device

Abstract

The utility model discloses an electrostatic spinning device. The electrostatic spinning device comprises a rotating shaft; the plurality of electrode assemblies are arranged at intervals along the axial direction of the rotating shaft so as to rotate under the driving of the rotating shaft and are used for dipping a spinning solution and generating jet flow; and the at least two metal plates are arranged on two sides of the plurality of electrode assemblies along the axial direction of the rotating shaft, are separately arranged with the electrode assemblies, and are electrically connected with the rotating shaft. According to the electrostatic spinning device, the metal plate partially neutralizes the electric field on the electrode assembly on the outer side, so that the electric field borne by the electrode assembly on the outer side and the electric field borne by the electrode assembly on the inner side are kept consistent as much as possible, and therefore the consistency of spinning formed by the electrode assemblies is guaranteed; and the quality of a finally formed product is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spinning, in particular to an electrostatic spinning device. Background Art

[0002] Electrospinning is a method of using high-voltage static electricity to prepare polymer solutions or melts into ultrafine fibers. The working principle of electrospinning is to establish a high-voltage electric field between the electrode and the collecting plate, so that the electrode is induced or directly charged, and the solution on the electrode is charged or polarized and subjected to strong stretching by the electric field force. When the electric field force it is subjected to exceeds the viscous resistance and surface tension, the solution forms a jet and is sprayed onto the collecting plate. The jet cools and solidifies or the solvent evaporates to form fibers.

[0003] However, in practice, it is found that since the electrodes are arranged in an array along the axial direction on the rotating shaft, the electric field forces exerted on each electrode at different positions are different. Generally, the outer electrodes are subjected to a stronger electric field, which causes the fibers formed by the outer electrode jets to be thicker, thus affecting product quality. Utility Model Content

[0004] In order to solve at least one of the problems existing in the above-mentioned prior art, according to one aspect of the utility model, an electrospinning device is provided, comprising: a rotating shaft; a plurality of electrode assemblies, which are arranged and separated along the axial direction of the rotating shaft so as to rotate under the drive of the rotating shaft to pick up the spinning liquid and generate a jet; a pair of metal plates, which are arranged along the axial direction of the rotating shaft and are located on both sides of the plurality of electrode assemblies, and are respectively separated from the electrode assemblies and electrically connected to the rotating shaft.

[0005] In some embodiments, the electrospinning device comprises two metal plates, and the central angle of each metal plate is in the range of 120°-180°.

[0006] In some embodiments, along the axial direction of the rotating shaft, the thickness d of the metal plate is in the range of 0<d≤10 mm.

[0007] In some embodiments, the distance L1 between the metal plate and the adjacent electrode assembly is in the range of 0<L1≤20 mm.

[0008] In some embodiments, along the axial direction of the rotating shaft, the distance L1 between the metal plate and the adjacent electrode assemblies is equal to the distance L2 between every two adjacent electrode assemblies.

[0009] In some embodiments, the metal plate and the rotating shaft are provided independently.

[0010] In some embodiments, a groove is provided on the metal plate, and the groove is for inserting the rotating shaft, and the curvature of the groove is the same as the curvature of the rotating shaft.

[0011] In some embodiments, the radius of the electrode assembly in the radial direction of the rotating shaft is equal to the radius of the metal plate in the radial direction of the rotating shaft.

[0012] In some embodiments, the electrode assembly includes a mounting bracket and a plurality of electrodes provided on the mounting bracket. The mounting bracket is connected to the rotating shaft, and the plurality of electrodes are arranged along the circumferential direction of the rotating shaft.

[0013] In some embodiments, the electrodes extend along the axial direction of the rotating shaft.

[0014] In summary, the electrospinning device provided by the present utility model has the following technical effects:

[0015] By providing metal plates on both sides of a plurality of electrode assemblies, when a voltage is applied to the rotating shaft and the electrode assemblies, the metal plates neutralize the electric field in the axial direction parallel to the rotating shaft of the electrode assemblies, so as to weaken the electric field on the outermost electrode assembly. In this way, the electric field received by the outermost electrode assembly is made to be as consistent as possible with the electric field received by the innermost electrode assembly, thereby ensuring the consistency of the electrospinning formed by each electrode assembly and ensuring the quality of the finally formed product. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of an electrospinning device in the prior art;

[0017] Figure 2 is a three-dimensional schematic diagram of the electrospinning device according to an embodiment of the present utility model;

[0018] Figure 3 is Figure 2 the exploded schematic diagram of the electrospinning device in;

[0019] Figure 4 is Figure 2 the schematic structural diagram of the electrospinning device in;

[0020] Figure 5 is a comparative curve graph of the electric fields of the electrode assemblies with a metal plate provided outside the electrode assembly and without a metal plate provided outside the electrode assembly according to an embodiment of the present utility model.

[0021] Drawings: 100 - electrospinning device, 10 - rotating shaft, 20 - electrode assembly, 21 - mounting bracket, 211 - collar, 212 - mounting arm, 22 - electrode, 30 - metal plate, 31 - groove, 200 - receiving plate, 300 - electrospinning device, 10 - rotating shaft, 20 - electrode assembly, 22 - electrode. Detailed implementation manners

[0022] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0025] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Please refer to Figure 1 , which is an electrospinning device 300 in the prior art, including a rotating shaft 10 and a plurality of electrode assemblies 20 arranged on the rotating shaft 10. The plurality of electrode assemblies 20 are evenly arranged on the rotating shaft 10. Each electrode assembly 20 is used to dip the spinning solution and form a jet, so as to form a spun fiber on the receiving plate 200.

[0027] However, after applying a voltage to the rotating shaft 10 and connecting it to each electrode 22, the electric field intensities formed at each electrode 22 are different. As shown by curve a in Figure 5 , the electric field intensities of the electrodes 22 in the two outer electrode assemblies 20 are relatively large, and the electric field of the electrodes 22 in the middle region is relatively small. Therefore, when forming a spun fiber on the receiving plate 200, the spun fiber thickness formed at the positions corresponding to the receiving plate 200 by the two outer electrode assemblies 20 is relatively thick, and the spun fiber thickness formed by several electrodes 22 in the middle region on the receiving plate 200 is relatively thin. Thus, the uniformity of the final spun fiber is affected.

[0028] Please refer to Figures 2 to 5 , to solve the above technical problems, the present embodiment provides an electrospinning device 100, which not only includes the above-mentioned rotating shaft 10 and electrode assemblies 20, but also includes a pair of metal plates 30.

[0029] Among them, the rotating shaft 10 is used to rotate under the drive of a driving mechanism, for example, it rotates driven by a motor; a plurality of electrode assemblies 20 are arranged at intervals along the axial direction of the rotating shaft 10 to rotate driven by the rotating shaft 10, and are used to dip the spinning solution and generate a jet; at least two metal plates 30 are arranged along the axial direction of the rotating shaft 10 and are located on both sides of the plurality of electrode assemblies 20, and are respectively separated from the electrode assemblies 20 and are electrically connected to the rotating shaft 10.

[0030] For the above-mentioned electrospinning device 100, by arranging metal plates 30 on both sides of the plurality of electrode assemblies 20, when a voltage is applied to the rotating shaft 10 and the electrode assemblies 20, the metal plates 30 neutralize the sub-electric fields of the electrode assemblies 20 along the axial direction parallel to the rotating shaft 10, so as to weaken the electric field on the outermost electrode assembly 20. In this way, the electric fields received by the outermost electrode assembly 20 and the inner electrode assemblies 20 are made to be as consistent as possible, thereby ensuring the consistency of the electrospinning formed by each electrode assembly 20 and ensuring the quality of the finally formed product.

[0031] Among them, in order to ensure the uniformity of electrospinning, the metal plate 30 and the rotating shaft 10 are separately arranged, and the metal plate 30 is not installed on the rotating shaft. Thus, when the rotating shaft 10 drives the electrode assembly 20 to dip the spinning solution from the container, the metal plate 30 can be set to a static state, for example, fixed by a fixing device, to avoid moving together with the rotating shaft 10, thereby avoiding the metal plate 30 from dipping the spinning solution and forming a jet at the metal plate 30 after the electric field is applied, which affects the uniformity of electrospinning.

[0032] Among them, the metal plate 30 needs to be electrically connected to the rotating shaft 10. The way of electrically connecting the metal plate 30 and the rotating shaft 10 can be that the metal plate 30 and the rotating shaft 10 are connected by a wire, so as not to affect the movement of the rotating shaft driving the electrode assembly 20. When the rotating shaft 10 is powered on, the metal plate 30 can also be charged.

[0033] Furthermore, a groove 31 is provided on the metal plate 30 for the rotating shaft 10 to be inserted into. The curvature of the groove 31 is the same as that of the rotating shaft 10, that is, when the rotating shaft 10 drives the electrode assembly 20 to dip the spinning solution and then moves into the groove 31 of the metal plate 30, the rotating shaft 10 can have the same gap with the groove wall of the groove 31, which is convenient for the operation of the rotating shaft 10.

[0034] Furthermore, in this embodiment, when the rotating shaft 10 is located in the groove 31, the radius of the electrode assembly 20 along the radial direction of the rotating shaft 10 is equal to the radius of the metal plate 30 along the radial direction of the rotating shaft 10. In this way, after the rotating shaft 10 is arranged in the groove 31, the metal plate 30 can neutralize the electric fields of each region of the electrode 22 to the same extent, so as to further ensure the uniformity of the electrospinning formed from each motor.

[0035] Please refer toFigure 2 and Figure 3 , the electrospinning device of this embodiment includes two metal plates. The range of the central angle of each metal plate 30 is 120° - 180°. In this way, since the electrode 22 rotates with the rotating shaft 10, the metal plate 30 can be as much as possible in phase with the electric field of the electrode assembly 20, and the waste of the material of the metal plate 30 can also be avoided.

[0036] Among them, along the axial direction of the rotating shaft 10, the range of the thickness d of the metal plate 30 is 0 < d ≤ 10 mm, so that when the metal plate 30 can generate a sufficient electric field, the waste of metal materials can be avoided. Among them, the thickness of the metal plate 30 can be set to values such as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc., which are not limited here.

[0037] Among them, please refer to Figure 4 , along the axial direction of the rotating shaft 10, the distance L1 between the metal plate 30 of this embodiment and the adjacent electrode assembly 20 is equal to the distance L2 between every two adjacent electrode assemblies 20, so as to ensure that the electrode assembly 20 located on the outside and each electrode assembly 20 located in the middle can have the same size of electric field to generate the same size of jet, thereby ensuring the uniformity of electrospinning.

[0038] Specifically, the range of the distance L1 between the metal plate 30 of this embodiment and the adjacent electrode assembly 20 is 0 < L1 ≤ 20 mm. Among them, the distance L1 between the metal plate 30 and the adjacent electrode assembly 20 and the distance L2 between every two adjacent electrode assemblies 20 can be set to values such as 5 mm, 10 mm, 15 mm, 20 mm, etc., which are not limited here.

[0039] For example, when the distance between the metal plate 30 and the adjacent electrode assembly 20 is set to 5 mm, the distance between every two electrode assemblies 20 in the middle area is 5 mm; when the distance between the metal plate 30 and the adjacent electrode assembly 20 is set to 10 mm, the distance between every two electrode assemblies 20 in the middle area is 10 mm.

[0040] Among them, the material of the metal plate 30 of this embodiment can be metal materials such as iron, copper, aluminum, stainless steel, etc. Specifically, the metal plate 30 of this embodiment adopts stainless steel, so that the metal plate 30 has a certain structural strength, can reduce the use cost, and can reduce the rusting rate after long-term use.

[0041] Please refer to Figure 2 and Figure 3, which is a schematic structural diagram of the electrode assembly 20 of this embodiment. The electrode assembly 20 includes a mounting frame 21 and a plurality of electrodes 22 provided on the mounting frame 21. The mounting frame 21 is connected to the rotating shaft 10. The mounting frame 21 is connected to the rotating shaft 10, and the plurality of electrodes 22 are arranged along the circumferential direction of the rotating shaft 10. In this way, driven by the rotating shaft 10, a jet can be generated through the plurality of circumferentially arranged electrodes 22 to continuously generate spinning.

[0042] Specifically, the mounting frame 21 of this embodiment includes a collar 211 and a plurality of mounting arms 212 provided on the collar 211. The collar 211 is sleeved on the rotating shaft 10, and the plurality of mounting arms 212 are arranged along the circumferential direction of the rotating shaft 10. Each mounting arm 212 extends radially toward the rotating shaft 10, and an electrode 22 is mounted on one mounting arm 212. Thus, by setting a plurality of mounting arms 212, the plurality of electrodes 22 can be mounted, and at the same time, interference between the electrodes 22 can be avoided.

[0043] Among them, the mounting arms 212 of this embodiment are arranged in a coplanar manner along the axial direction of the rotating shaft 10. In other embodiments, the plurality of mounting arms 212 can also be arranged in a staggered manner in sequence.

[0044] Furthermore, the electrode 22 of this embodiment extends along the axial direction of the rotating shaft 10, that is, driven by the rotating shaft 10, the electrode 22 can have a larger facing area toward the receiving plate 200 to improve the efficiency of spinning.

[0045] Among them, the electric field intensity on the motor assembly 20 after the metal plate 30 is provided outside the electrode assembly 20 in this embodiment is as Figure 5 shown by the curve b in.

[0046] For the above-mentioned electrospinning device 100, by providing metal plates 30 on both sides of the electrode assembly 20, the electric field on the electrode assembly 20 can be neutralized by the metal plates 30, thereby ensuring the uniformity of the electric field generated by each electrode assembly 20 to ensure the uniformity of spinning; by independently setting the metal plates 30 and the rotating shaft 10, it is avoided that the metal plates 30 pick up the spinning solution and generate jets under the drive of the rotating shaft 10, which affects the uniformity of spinning.

[0047] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include the technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present invention.

Claims

1. An electrospinning device (100), characterized in that: include: A rotating shaft (10); A plurality of electrode assemblies (20) are arranged in a spaced relationship along the axial direction of the rotating shaft (10) so as to rotate under the drive of the rotating shaft (10) and to absorb the spinning solution and generate a jet; At least two metal plates (30) are arranged along the axial direction of the rotating shaft (10) and are located on both sides of the plurality of electrode assemblies (20), are respectively separated from the electrode assemblies (20), and are electrically connected to the rotating shaft (10).

2. The electrospinning device (100) according to claim 1, characterized in that: The electrospinning device (100) comprises two metal plates (30), and the central angle of each metal plate (30) is in the range of 120°-180°.

3. The electrospinning device (100) according to claim 1 or 2, characterized in that: Along the axial direction of the rotating shaft (10), the thickness d of the metal plate (30) is in the range of 0<d≤10 mm.

4. The electrospinning device (100) according to claim 1 or 2, characterized in that: The range of the distance L1 between the metal plate (30) and the adjacent electrode assembly (20) is 0<L1≤20mm.

5. The electrospinning device (100) according to claim 1 or 2, characterized in that: Along the axial direction of the rotating shaft (10), the spacing L1 between the metal plate (30) and the adjacent electrode assembly (20) is equal to the spacing L2 between each two adjacent electrode assemblies (20).

6. The electrospinning device (100) according to claim 1 or 2, characterized in that: The metal plate (30) and the rotating shaft (10) are arranged separately.

7. The electrospinning device (100) according to claim 6, characterized in that: The metal plate (30) is provided with a groove (31), and the groove (31) is used for the rotation shaft (10) to be inserted, and the curvature of the groove (31) is the same as the curvature of the rotation shaft (10).

8. The electrospinning device (100) according to claim 7, characterized in that: The radius of the electrode assembly (20) along the radial direction of the rotating shaft (10) is equal to the radius of the metal plate (30) along the radial direction of the rotating shaft (10).

9. The electrospinning device (100) according to claim 1 or 2, characterized in that: The electrode assembly (20) comprises a mounting frame (21) and a plurality of electrodes (22) arranged on the mounting frame (21); the mounting frame (21) is connected to the rotating shaft (10); and the plurality of electrodes (22) are arranged along the circumference of the rotating shaft (10).

10. The electrospinning device (100) according to claim 9, characterized in that: The electrode (22) extends along the axial direction of the rotating shaft (10).

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