Combined disc needle-free electrostatic spinning device

Abstract

The invention discloses a combined disc needle-free electrostatic spinning device, and relates to the technical field of needle-free electrostatic spinning. The nanofiber material can be produced on a large scale in a high-strength uniform electric field, and the phenomenon that a spinning part is blocked due to rapid solidification of a spinning solution can be avoided. A combined disc needle-free electrostatic spinning device comprises a center disc gear and a plurality of bevel gear disc assemblies evenly distributed on the center disc gear in the circumferential direction. The bevel gear disc assembly comprises a conductive rotating shaft, a bevel gear and a disc, the conductive rotating shaft is connected with a high-voltage power supply; the bevel gear is meshed with the central disc gear; the disc is located on the outer side of the center disc gear, and the center line of the disc extends in the horizontal direction. A groove is formed in the outer cylindrical face of the disc, and a baffle is arranged in the groove. The performance of the electrostatic spinning device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of needleless electrospinning, and in particular to a combined disc needleless electrospinning device. Background Art

[0002] Electrospinning technology is the main method for preparing nanofiber materials. Its advantages are low spinning cost, a wide variety of spinnable materials, and simple spinning process. The principle of electrospinning is to place the precursor solution in an electrostatic high-voltage electric field. The electric field force overcomes the surface tension of the precursor solution to form a jet. The electric field stretches the jet and deposits it on the receiving device to form a nanofiber material. It can be widely used in filter materials, adsorption materials, medical materials, sensors and other fields.

[0003] The existing technologies for large-scale preparation of nanofiber materials are mainly divided into two categories: multi-needle electrospinning technology and needleless electrospinning technology. The disadvantage of multi-needle technology is that it requires optimized design and combination of multiple needles to reduce mutual interference of electric fields, and the needles are easy to clog and difficult to clean. Needleless electrospinning technology mainly includes free liquid surface spinning, bubble electrospinning, turntable electrospinning, etc. Most of the existing needleless electrospinning devices have problems such as insufficient electric field strength and uneven electric field distribution, which leads to uneven fiber thickness, and it is easy to have problems such as difficulty in controlling the continuity and stability of the production process, which ultimately affects the performance and quality of the fiber material. Summary of the invention

[0004] The embodiments of the present application provide a combined disc needleless electrospinning device, which can not only produce nanofiber materials on a large scale under a high-intensity uniform electric field, but also avoid clogging of the spinning components caused by rapid coagulation of the spinning solution.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides a combined disc needleless electrospinning device, including a central disc gear and a plurality of bevel gear disc assemblies evenly distributed on the central disc gear along the circumferential direction; the bevel gear disc assembly includes a conductive rotating shaft and a bevel gear and a disc connected to the conductive rotating shaft; the conductive rotating shaft is connected to a high-voltage power supply; the bevel gear is meshed with the central disc gear; the disc is located on the outer side of the central disc gear, and the center line of the disc extends in the horizontal direction; a groove is provided on the outer cylindrical surface of the disc, and a baffle is provided in the groove.

[0006] Furthermore, the groove is an annular groove.

[0007] Furthermore, the annular groove is a double groove.

[0008] Furthermore, there are multiple baffles; the multiple baffles are evenly distributed in the annular groove along the circumferential direction, and the angle between two adjacent baffles is 30 to 60 degrees.

[0009] Furthermore, the baffle has a thickness of 1 to 2 mm.

[0010] Furthermore, the central disc gear and the bevel gear are both made of insulating materials; the disc and the baffle are both made of conductive materials; and the conductive shaft is a metal hollow tube.

[0011] Furthermore, the diameter of the central disc gear is 200-240 mm; the diameter of the disc is 100-120 mm; the outer diameter of the conductive shaft is 14-22 mm, and the inner diameter is 10-16 mm.

[0012] Furthermore, the number of the bevel gear disc assemblies is four, five or six.

[0013] Furthermore, the angle between two adjacent baffles is 36°, 30° or 60°.

[0014] Furthermore, the width of the mouth of the groove is greater than the width of the bottom.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] 1. In the embodiment of the present application, a groove is formed on the rotating disk, and a baffle is embedded in the groove. The groove can store the spinning solution and provide the fiber jet endpoint, and the baffle can achieve uniformity of the spinning electric field and enhance the electric field strength.

[0017] 2. In the embodiment of the present application, the central disc gear drives multiple discs to rotate and spin at the same time, without driving each disc to rotate separately, which can effectively increase the output of nanofibers.

[0018] 3. The multiple discs in the embodiment of the present application are evenly distributed on the outer periphery of the central disc gear along the circumferential direction, which can reduce the mutual interference of the electric fields between the small discs during the spinning process and reduce the clogging of the spinning components.

[0019] 4. The baffle in the embodiment of the present application is made of conductive material and has a thickness of 1 to 2 mm, which can effectively increase the electric field strength at the spinning point. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying any creative work.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the present application;

[0022] Figure 2A top view of Example 1 of the present application;

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the disc in Example 1 of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not 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 this application.

[0026] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0027] In the description of the present 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. For ordinary technicians in this field, they can understand the specific meanings of the above terms in this application according to specific circumstances.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" can explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0029] Embodiment 1:

[0030] Reference Figures 1 to 4 An embodiment of the present application provides a combined disc needleless electrospinning device, comprising a central disc gear 1 and six bevel gear disc assemblies uniformly distributed on the central disc gear 1 along the circumferential direction.

[0031] The center line of the center disc gear 1 is arranged in the vertical direction, and the toothed surface of the center disc gear 1 faces upward. The diameter of the center disc gear 1 is 200 to 240 mm, and an insulating material is used. The use of insulating material can reduce the impact on the surrounding electric field.

[0032] The bevel gear disc assembly includes a conductive shaft 2, a bevel gear 3 and a disc 4 connected to the conductive shaft 2. The conductive shaft 2 is a metal hollow tube with a length of 30 to 35 mm, an outer diameter of 14 to 22 mm, and an inner diameter of 10 to 16 mm. The inner end of the metal hollow tube is connected to the bevel gear 3, and the outer end is connected to the high-voltage power supply through a wire, and the disc 4 is connected in the middle. The high-voltage power supply can provide the voltage required for electrospinning.

[0033] The bevel gear 3 meshes with the center disc gear 1 , and the bevel gear 3 is also made of insulating material to reduce the impact on the surrounding electric field.

[0034] The disc 4 is located on the outside of the center disc gear 1 and is perpendicular to the center disc gear 1, that is, the center line of the disc 4 extends in the horizontal direction, that is, six circles are arranged on the outside of the center disc gear 1. In this way, the electric field interference between the discs 4 can be reduced during the spinning process, reducing the clogging of the spinning components.

[0035] The diameter of the disk 4 is 100-120 mm. A groove 5 is provided on the outer cylindrical surface of the disk 4, and the groove 5 is an annular groove and a double groove. The mouth width of the groove 5 is greater than the bottom width. A baffle 6 is provided in the groove 5. There are multiple baffles 6, and the multiple baffles 6 are evenly distributed in the annular groove along the circumferential direction, and the angle between two adjacent baffles 6 is 36°. The thickness of the baffle 6 is 1-2 mm. The disk 4 and the baffle 6 are both made of conductive materials, which can increase the electric field strength.

[0036] The working process of the combined disc needleless electrospinning device of the present application embodiment is as follows:

[0037] The device of the embodiment of the present application is immersed in the spinning liquid, so that the center disc gear 1 starts to rotate, thereby driving the bevel gear 3 to rotate, and then driving the conductive shaft 2 to rotate, and then driving the disc 4 with the groove 5 to start rotating. After the spinning liquid is evenly attached to the groove 5, electrostatic high voltage is applied. When the critical voltage is exceeded, a fiber jet is formed from the groove 5 at the outer edge of the disc 4 and deposited on the collecting plate.

[0038] Thus, the rotation of the central disc gear 1 can simultaneously drive the six bevel gears 3 to rotate and then drive the six discs 4 to rotate for spinning, without the need to drive each disc 4 separately, which effectively increases the output of nanofibers and reduces the clogging of spinning components. In addition, the groove 5 provided on the disc 4 can store the spinning solution and provide the fiber jet endpoint, making the electric field distribution more uniform, and the multiple baffles 6 in the groove 5 can achieve the uniformity of the spinning electric field and increase the electric field strength at the spinning endpoint. Therefore, the combined disc needleless electrostatic spinning device can not only produce nanofiber materials on a large scale under a high-intensity uniform electric field, but also eliminate the clogging of the spinning components caused by the rapid solidification of the spinning solution.

[0039] Embodiment 2:

[0040] The difference between Example 2 and Example 1 is that the number of bevel gear disc assemblies in Example 2 is five. The five bevel gear disc assemblies are evenly distributed on the central disc gear 1 along the circumferential direction.

[0041] Embodiment 3:

[0042] The only difference between Example 3 and Example 1 is that there are four sets of bevel gear disc assemblies in Example 3. The four sets of bevel gear disc assemblies are evenly distributed on the central disc gear 1 along the circumferential direction.

[0043] Embodiment 4:

[0044] The only difference between Example 4 and Example 1 is that the number of baffles 6 in the groove 5 of Example 4 is different from that in Example 1, and a baffle 6 is arranged in the groove 5 of Example 4 every 30°.

[0045] Embodiment 5:

[0046] The only difference between Example 5 and Example 1 is that the number of baffles 6 in the groove 5 of Example 5 is also different from that in Example 1, and a baffle 6 is arranged in the groove 5 at every 60° in Example 5.

[0047] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A combined disc needleless electrospinning device, characterized in that: It includes a central disc gear and a plurality of bevel gear disc assemblies uniformly distributed on the central disc gear along the circumferential direction; the bevel gear disc assembly includes a conductive shaft and a bevel gear and a disc connected to the conductive shaft; the conductive shaft is connected to a high-voltage power supply; the bevel gear is meshed with the central disc gear; the disc is located on the outer side of the central disc gear, and the center line of the disc extends in the horizontal direction; a groove is provided on the outer cylindrical surface of the disc, and a baffle is provided in the groove.

2. The combined disc needleless electrospinning device according to claim 1, characterized in that: The groove is an annular groove.

3. The combined disc needleless electrospinning device according to claim 2, characterized in that: The annular groove is a double groove.

4. The combined disc needleless electrospinning device according to claim 2, characterized in that: There are multiple baffles; the multiple baffles are evenly distributed in the annular groove along the circumferential direction, and the angle between two adjacent baffles is 30-60 degrees.

5. The combined disc needleless electrospinning device according to claim 4, characterized in that: The thickness of the baffle is 1-2 mm.

6. The combined disc needleless electrospinning device according to claim 5, characterized in that: The central disc gear and the bevel gear are both made of insulating materials; the disc and the baffle are both made of conductive materials; and the conductive rotating shaft is a metal hollow tube.

7. The combined disc needleless electrospinning device according to claim 6, characterized in that: The diameter of the central disc gear is 200-240 mm; the diameter of the disc is 100-120 mm; the outer diameter of the conductive shaft is 14-22 mm, and the inner diameter is 10-16 mm.

8. The combined disc needleless electrospinning device according to claim 7, characterized in that: The number of the bevel gear disc assemblies is four, five or six groups.

9. The combined disc needleless electrospinning device according to claim 8, characterized in that: The included angle between two adjacent baffles is 36°, 30° or 60°.

10. The combined disc needleless electrospinning device according to claim 9, characterized in that: The width of the mouth of the groove is greater than the width of the bottom.

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