Porous electrostatic spinning nozzle for regulating and controlling air permeability of nanofiber membrane

Abstract

The utility model discloses a porous electrostatic spinning nozzle for regulating and controlling the air permeability of a nanofiber membrane, which comprises a base assembly, the base assembly is connected with a movable support assembly, and a plurality of electrostatic spinning ejectors are arranged at the upper end of the movable support assembly. The multiple electrostatic spinning ejectors can be moved and fixed on the movable support assembly, and the distance between the adjacent electrostatic spinning ejectors is adjusted. According to the porous electrostatic spinning nozzle with the adjustable gaps, the gaps among the spinning nozzles can be adjusted, and the distribution of fibers is changed when the fibers fall on the receiving device, so that nanofiber membranes with different pore structures are obtained, and the purpose of regulating and controlling the air permeability of the nanofiber membranes is achieved. Meanwhile, the gap of the electrostatic spinning nozzle is adjusted, electrostatic spinning with the specified diameter is sprayed out, the nozzle does not need to be disassembled when electrostatic spinning with different widths is manufactured, adjustment is directly conducted, use is convenient, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spinning, in particular to a porous electrostatic spinning nozzle for regulating the air permeability of a nanofiber membrane. Background Art

[0002] Electrospinning is a specialized form of electrostatic atomization of polymer fluids. The resulting atomized material is not microscopic droplets, but rather tiny polymer jets that can travel considerable distances and ultimately solidify into fibers. Electrospinning is a specialized fiber manufacturing process in which a polymer solution or melt is jet-spun in a strong electric field. Under the influence of the electric field, the droplet at the needle changes from a spherical shape to a conical shape, extending from the cone's tip to form fiber filaments. The fibers rapidly solidify during the jetting process and deposit on the collector electrode, forming a nanofiber membrane.

[0003] For example, the patent number is: 202322874109.5, and the patent name is: An electrostatic spinning nozzle, comprising a plurality of transversely spliced ​​flow channel plates and needles; each of the flow channel plates is provided with a liquid inlet, a accommodating chamber and a flow channel, the liquid inlet is used to connect to a liquid supply device, the accommodating chamber is connected to the liquid inlet and the flow channel, a liquid outlet is provided at the end of the flow channel, the liquid outlet is located at the bottom of the flow channel plate, and the accommodating chambers of every two adjacent flow channel plates are connected; the needle is arranged in the liquid outlet and fixed by a conductive plate, and every two adjacent conductive plates are connected by a wire, and the conductive plate at the end is connected to the positive pole of the power supply for providing a high-voltage electric field. The electrostatic spinning nozzle of the present application has a simple structure and is easy to install. The number of needles can be increased or decreased according to the needs of the spinning work, thereby improving the preparation efficiency of nanofibers and meeting the rapid preparation of composite nanofibers.

[0004] Its electrospinning nozzle has a simple structure and is easy to install. The number of needles can be increased according to the needs of the spinning work, which can improve the preparation efficiency of nanofibers and also meet the different structural requirements of composite nanofibers for various application fields.

[0005] The existing methods for regulating the air permeability of nanofiber membranes are mainly to change the diameter of the nanofibers by adjusting the electrospinning process such as the receiving distance, solution concentration, etc. or replacing the electrospinning nozzle. The porosity of the resulting nanofiber membrane changes, thereby achieving the purpose of regulating the air permeability. Not only is it difficult to control the pore structure, but there is also the problem of a small adjustable range of pore size. At the same time, its pore size is large or unevenly distributed, making it difficult to achieve an ideal air permeability effect. Utility Model Content

[0006] In view of this, in order to solve the problem that traditional electrospinning requires changing various process parameters when different porosities are required to obtain nanofiber membranes with different air permeabilities, which is very inconvenient and difficult to adapt to different spinning conditions and material requirements, limiting its application scope and making it impractical and inconvenient, the utility model proposes a porous electrospinning nozzle for regulating the air permeability of nanofiber membranes.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A porous electrospinning nozzle for regulating the air permeability of nanofiber membranes includes a base assembly, the base assembly is connected to a movable bracket assembly, and a plurality of electrospinning injectors are arranged on the upper end of the movable bracket assembly. The plurality of electrospinning injectors can be moved and fixed on the movable bracket assembly to complete the spacing adjustment between adjacent electrospinning injectors.

[0009] As a further improvement of the above technical solution:

[0010] Preferably, the movable bracket assembly includes a movable bracket base arranged at the upper end of the base assembly, a plurality of injector fixing assemblies slidably arranged on the movable bracket base, and a fixing and loosening assembly arranged between the injector fixing assembly and the movable bracket base, and the injector fixing assembly and the movable bracket base are loosened and fixed by the fixing and loosening assembly, and an electrospinning injector is fixedly arranged on the injector fixing assembly.

[0011] Preferably, the injector fixing assembly includes a movable seat slidably arranged on the upper end of the movable bracket base, support plates arranged on the left and right sides of the movable seat, and a positioning plate detachably arranged on the upper ends of the two support plates, and the electrospinning injector is arranged between the two support plates.

[0012] Preferably, a slot is provided on one side opposite to the two support plates, and the electrospinning ejector is located in the slot.

[0013] Preferably, a limiting groove is provided at the upper end of the support plate, and a limiting block is provided at the lower end of the positioning plate, and the positioning plate limits the upper ends of the two support plates by inserting the limiting block into the limiting groove.

[0014] Preferably, an open groove running through the front and back is provided inside the mobile bracket base, a movable slide groove is provided at the upper end of the mobile bracket base, and a sliding block is provided at the lower end of the injector fixing assembly. The injector fixing assembly can slide left and right on the mobile bracket base by inserting the sliding block into the movable slide groove.

[0015] Preferably, the fixing and releasing assembly includes two plug-in plates that slide up and down in the mounting grooves on the sliding blocks, plug-in blocks that are arranged on opposite sides of the two plug-in plates, and connecting shafts that are arranged on opposite sides of the two plug-in plates. Connecting grooves are provided on opposite sides of the two connecting shafts, and connecting blocks are laterally provided at the ends of the connecting grooves. The two connecting blocks form an L shape, and connecting springs are provided in the connecting grooves. The two ends of the connecting springs are respectively located at the end of the connecting groove on one of the connecting shafts and the bottom of the connecting block on the other connecting shaft. A number of slots matching the plug-in plates are provided on the upper and lower sides of the open groove.

[0016] Preferably, a plurality of the plug-in blocks are arranged at equal distances on the plug-in board, and the plug-in blocks are plugged into the corresponding slots.

[0017] Preferably, the base assembly includes a side panel connected to an external machine, a telescopic rod and an electric push rod fixed parallel to the side panel, the other ends of the telescopic rod and the electric push rod are connected to the fixed bracket base, and a movable bracket assembly is provided on the upper end of the fixed bracket base.

[0018] Preferably, the side plate is provided with an ejector tail chute, and the tail of the electrospinning ejector is laterally slidably arranged in the ejector tail chute.

[0019] Preferably, several of the base assemblies correspond one-to-one to several of the movable bracket assemblies, each of the movable bracket assemblies is provided with an electrospinning ejector, each of the base assemblies is provided with an upper and lower adjustment slide groove, and adjacent movable bracket assemblies are connected by upper and lower sliding.

[0020] Compared with the existing technology, the beneficial effects of the utility model are:

[0021] The utility model provides a porous electrospinning nozzle with adjustable gaps. The gaps between several spinning nozzles are adjustable, and the distribution of fiber filaments changes when they fall on a receiving device, thereby obtaining nanofiber membranes with different pore structures, thereby achieving the purpose of regulating their air permeability.

[0022] At the same time, the gap of the electrospinning nozzle is adjusted to spray out electrospinning of specified diameter. When making electrospinning of different widths, there is no need to disassemble the nozzle, and it can be adjusted directly. It is easy to use and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of Example 1 of the present utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of area A;

[0025] Figure 3 This is a schematic diagram of the front view structure of the mobile bracket assembly of Example 1 of the present utility model;

[0026] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of the middle B area;

[0027] Figure 5 Schematic diagram of the installation slot structure of embodiment 1 of the utility model

[0028] Figure 6 This is a schematic diagram of the front view structure of the side panel of Example 1 of the present utility model;

[0029] Figure 7 This is a schematic diagram of the overall three-dimensional structure of Example 2 of the present utility model;

[0030] Figure 8 This is a schematic diagram of the main view structure of the operating status of Example 2 of the present utility model.

[0031] In the figure: 1. Fixed bracket base; 2. Mobile bracket assembly; 201. Mobile bracket base; 202. Opening slot; 203. Mobile seat; 204. Support plate; 205. Positioning plate; 206. Mobile slide; 207. Sliding block; 208. Slot; 209. Limit block; 210. Limit slot; 211. Mounting slot; 212. Insert plate; 213. Connecting shaft; 214. Connecting slot; 215. Connecting block; 216. Connecting spring; 217. Insert block; 218. Slot; 3. Telescopic rod; 4. Side panel; 5. Electric push rod; 6. Electrospinning ejector; 7. Injector tail slide; 8. Up and down adjustment slide. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] Example 1

[0036] This technical solution is as attached Figure 1 ~Attachment Figure 6 As shown, it includes two major parts, one is a structure for fixing and adjusting the electrospinning jet 6, and the other is a structure for driving the electrospinning jet 6 to move back and forth;

[0037] The specific structure of the structure for fixing and adjusting the electrospinning jet 6 (movable bracket assembly 2) is as follows: an open groove 202 running through the front and back is provided inside the movable bracket base 201, and a movable slide 206 is provided at the upper end of the movable bracket base 201, and the movable slide 206 is communicated with the open groove 202. At the same time, a movable seat 203 is provided at the upper end of the movable bracket base 201, and a sliding block 207 is provided at the lower end of the movable seat 203. The movable seat 203 is inserted into the movable slide 206 through the sliding block 207 so that it can slide left and right on the movable bracket base 201. At the same time, it can be seen from the accompanying drawings that the number of movable slides 206 and sliding blocks 207 is 2, and can be more, thereby making the operation process more stable.

[0038] Support plates 204 are provided on the left and right sides of the movable seat 203, and a limiting groove 210 is provided on the upper end surface of the support plate 204. A positioning plate 205 is provided on the upper end of the support plate 204, and a limiting block 209 is provided at the lower end of the positioning plate 205. The positioning plate 205 is inserted into the limiting groove 210 through the limiting block 209 to limit the upper ends of the two support plates 204. At the same time, a card slot 208 is provided on the opposite surfaces of the two support plates 204, and the card slot 208 is used to fix and limit the electrospinning injector 6.

[0039] It can also be seen from the accompanying drawings that a plurality of movable seats 203 are provided on the upper end of the movable bracket base 201 .

[0040] At the same time, by Figure 3 With attached Figure 4 It can be known that in order to facilitate the fixing and loosening of the movable seat 203, a corresponding fixing and loosening structure is also provided. The structure is specifically as follows: a mounting groove 211 is provided on the sliding block 207 located in the opening groove 202. Figure 5It can be seen that the mounting groove 211 is a semi-cylindrical groove with sliding grooves on both sides, which is convenient for arranging two plug-in plates 212 that can slide up and down in the mounting groove 211. Connecting shafts 213 are provided on opposite sides of the two plug-in plates 212. The two connecting shafts 213 are staggered and their length is greater than half of the distance between the two plug-in plates 212. As a result, the ends of the connecting shafts 213 exceed the middle, forming a stagger. At the same time, connecting grooves 214 are provided at the staggered positions, and connecting blocks 215 are also provided at the ends, so that the connecting shafts 213 are L-shaped. At the same time, a connecting spring 216 is provided in the connecting groove 214, and the two ends of the connecting spring 216 are respectively located at the end of the connecting groove 214 on one of the connecting shafts 213 and the bottom of the connecting block 215 on the other connecting shaft 213;

[0041] An insert block 217 is provided on the opposite side of the two insert plates 212, and a row of equally spaced slots 218 are provided on the upper and lower surfaces of the corresponding opening groove 202. The insert block 217 and the slot 218 cooperate to form a snap-fit ​​fixed state. In order to ensure stability during the limiting process, a number of equally spaced insert blocks 217 are provided on the insert plate 212, and the number of insert blocks 217 is less than the number of slots 218. Therefore, by changing the positional relationship of the insert block 217 in the slot 218, the electrospinning jet 6 can be loosened and stably fixed.

[0042] The specific structure of the structure for driving the electrospinning jet 6 to move forward and backward is: a side panel 4 connected to the outside, a telescopic rod 3 and an electric push rod 5 are arranged parallel to one end face of the side panel 4, and the other ends of the telescopic rod 3 and the electric push rod 5 are connected to the fixed bracket base 1, and an ejector tail slide 7 is arranged at the upper end of the side panel 4, and the tail of the electrospinning jet 6 is arranged in the ejector tail slide 7 for horizontal sliding.

[0043] Implementation process and principle of Example 1:

[0044] 1) First, squeeze and slide the two plug-in plates 212 under the movable seat 203 that needs to be adjusted inward;

[0045] 2) The connecting spring 216 will then be forced to contract, and the insert plate 212 will drive the insert block 217 to disengage from the interior of the slot 218;

[0046] 3) The sliding block 207 will then lose its limit position, pushing the movable seat 203, and the sliding block 207 will move inside the opening slot 202 to adjust the gap between two adjacent movable seats 203;

[0047] 4) Finally, adjust the gap of the electrospinning jet 6. After adjusting it to the specified position, loosen the plug plate 212. The connecting spring 216 loses its thrust and resets under the action of torsion, driving the plug block 217 to be inserted into the corresponding slot 218, limiting the position of the movable seat 203. During this process, the left end of the electrospinning jet 6 will move inside the slide groove 7 at the tail of the jet.

[0048] To sum up, the porous electrospinning nozzle with adjustable gap limits the position of the movable seat 203 by setting a movable bracket. During this process, the left end of the electrospinning injector 6 will move inside the slide groove 7 at the tail of the injector. The gap between several electrospinning nozzles can be adjusted to spray out fiber filaments with a specified distribution density. When preparing nanofiber membranes with different air permeabilities, there is no need to disassemble the nozzle, and it can be directly adjusted. It is easy to use and improves efficiency. It solves the problem that traditional electrospinning is difficult to adapt to the application requirements of nanofiber membranes with different air permeabilities and is not practical and convenient.

[0049] Example 2

[0050] As attached Figure 7 With attached Figure 8 As shown, improvements are made on the basis of Example 1. First, an up and down adjustment slot 8 is provided at the rear end of the side panel 4. The up and down adjustment slot 8 can be used to move the side panel 4 up and down. At the same time, the movable bracket base 201 is composed of multiple sections of movable bracket bases 201. The adjacent movable bracket bases 201 are set to slide up and down. At the same time, the movable bracket base 201 and the side panel 4 are set one by one, thereby realizing the adjustment of the nozzle spacing in the up and down and left and right directions.

[0051] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A porous electrospinning nozzle for regulating the air permeability of nanofiber membranes, comprising a base assembly, characterized in that: The base assembly is connected to a movable support assembly (2), and a plurality of electrostatic spinning jets (6) are provided on the upper end of the movable support assembly (2). The plurality of electrostatic spinning jets (6) can be moved and fixed on the movable support assembly (2) to complete the adjustment of the spacing between adjacent electrostatic spinning jets (6).

2. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 1, characterized in that: The movable support assembly (2) comprises a movable support base (201) arranged at the upper end of the base assembly, a plurality of ejector fixing assemblies slidably arranged on the movable support base (201), and a fixing and loosening assembly arranged between the ejector fixing assembly and the movable support base (201), wherein the ejector fixing assembly and the movable support base (201) are loosened and fixed by the fixing and loosening assembly, and an electrostatic spinning ejector (6) is fixedly arranged on the ejector fixing assembly.

3. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 2, characterized in that: The ejector fixing assembly comprises a movable seat (203) slidably arranged on the upper end of the movable bracket base (201), support plates (204) arranged on the left and right sides of the movable seat (203), and a positioning plate (205) detachably arranged on the upper ends of the two support plates (204); the electrospinning ejector (6) is arranged between the two support plates (204).

4. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 3, characterized in that: A slot (208) is provided on one side opposite to the two support plates (204), and the electrostatic spinning ejector (6) is located in the slot (208).

5. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 3, characterized in that: A limiting groove (210) is provided at the upper end of the support plate (204), and a limiting block (209) is provided at the lower end of the positioning plate (205). The positioning plate (205) is inserted into the limiting groove (210) through the limiting block (209) to limit the upper ends of the two support plates (204).

6. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 2, characterized in that: The movable bracket base (201) is provided with an open groove (202) extending from front to back inside, the upper end of the movable bracket base (201) is provided with a movable slide groove (206), the lower end of the injector fixing assembly is provided with a sliding block (207), and the injector fixing assembly is inserted into the movable slide groove (206) through the sliding block (207) and can slide left and right on the movable bracket base (201).

7. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 6, characterized in that: The fixing and releasing assembly comprises two inserting plates (212) which are slidably arranged in the mounting grooves (211) on the sliding block (207), an inserting block (217) which is arranged on opposite sides of the two inserting plates (212), and a connecting shaft (213) which is arranged on opposite sides of the two inserting plates (212). The two connecting shafts (213) are provided with connecting grooves (214) on opposite sides. A connecting block (215) is transversely arranged at the end of the connecting groove (214). The two connecting blocks (215) are formed into an L shape. A connecting spring (216) is arranged in the connecting groove (214). The two ends of the connecting spring (216) are respectively located at the end of the connecting groove (214) on one connecting shaft (213) and the bottom of the connecting block (215) on the other connecting shaft (213). The upper and lower sides of the opening groove (202) are provided with a plurality of slots (218) which match the inserting plates (212).

8. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 7, characterized in that: A plurality of the inserting blocks (217) are arranged at equal distances on the inserting board (212), and the inserting blocks (217) are inserted into the interior of the corresponding slots (218).

9. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to claim 1, characterized in that: The base assembly comprises a side plate (4) connected to an external machine, a telescopic rod (3) and an electric push rod (5) fixedly arranged in parallel on the side plate (4), the other ends of the telescopic rod (3) and the electric push rod (5) being connected to a fixed bracket base (1), and a movable bracket assembly (2) being arranged on the upper end of the fixed bracket base (1); an ejector tail chute (7) is arranged on the side plate (4), and the tail of the electrostatic spinning ejector (6) is arranged to slide transversely in the ejector tail chute (7).

10. The porous electrospinning nozzle for regulating the air permeability of nanofiber membranes according to any one of claims 1 to 9, characterized in that: A plurality of the base assemblies correspond one to one with a plurality of the movable bracket assemblies (2), each of the movable bracket assemblies (2) is provided with an electrostatic spinning ejector (6), each of the base assemblies is provided with an up and down adjustment slide groove (8), and adjacent movable bracket assemblies (2) are connected in an up and down sliding manner.

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