Existing hollow multi-dimensional nozzle electrostatic spinning device

Abstract

The utility model discloses an existing hollow multi-dimensional nozzle electrostatic spinning device which comprises a spinning collecting barrel, a plurality of nozzles and a plurality of nozzles. A hollow nozzle penetrating inwards is inserted into the bottom of the spinning collecting barrel, and one end of the hollow nozzle is located in the spinning collecting barrel. The hollow spray head is in a rod shape and is hollow inside, and a plurality of spray holes are evenly formed in the surface of the hollow spray head. One end of the hollow nozzle is connected with a driving part, and the driving part drives the hollow nozzle to rotate by 360 degrees in the spinning collecting barrel; and the other end of the hollow spray head is connected with a solution feeding mechanism, so that the hollow spray head is continuously filled with a spinning solution through the solution feeding mechanism while the hollow spray head rotates. According to the utility model, 360-degree rapid and uniform spinning can be realized, the spinning quality is high, and the efficiency is high; the spinning machine is simple in structure, easy to process and high in spinning solution utilization rate, waste of spinning solutions is reduced, and the yield and quality of the spinning machine are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spinning equipment, in particular to an existing hollow multi-dimensional nozzle electrostatic spinning device. Background Art

[0002] The traditional large-scale production capacity of the linear electrode is to use a propulsion device with diameter movement on the linear electrode to supply the spinning solution. This method of brushing the solution on the iron wire is affected by its own material properties and structure. The amount of solution adhesion on the wire electrode is very random. The spinning solution at different positions has different cone angles. The conditions for the solution to form a Taylor cone under the action of the electric field have certain differences, which ultimately results in different spinning volumes at different positions on the linear electrode, resulting in certain differences in parameters such as the spinning film thickness and spinning diameter collected by the collection device, and poor spinning quality and uniformity. At the same time, due to the different amounts of solution adhered to the propulsion device at different positions, the position with a large amount of solution adhesion on the linear electrode is prone to liquid loss, resulting in waste of spinning solution and low spinning efficiency. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a current hollow multi-dimensional nozzle electrospinning device, which can achieve 360-degree fast and uniform spinning, high spinning quality and high efficiency; simple structure, easy processing, high utilization rate of spinning solution, reducing the waste of spinning solution, and greatly improving the output and quality of the spinning machine. In order to achieve the above-mentioned purpose and other advantages according to the present invention, a current hollow multi-dimensional nozzle electrospinning device is provided, including:

[0004] A spinning collection barrel, which is cylindrical;

[0005] A hollow nozzle penetrating the inside of the spinning collection barrel is inserted into the bottom of the spinning collection barrel, and one end of the hollow nozzle is located in the spinning collection barrel;

[0006] The hollow nozzle is rod-shaped and hollow inside, and a plurality of nozzle holes are evenly arranged on the surface of the hollow nozzle;

[0007] One end of the hollow nozzle is connected to a driving member, through which the hollow nozzle is driven to rotate 360 ​​degrees in the spinning collection barrel;

[0008] The other end of the hollow nozzle is connected to a solution feeding mechanism, so that while the hollow nozzle is rotating, the spinning solution is continuously filled into the hollow nozzle through the solution feeding mechanism.

[0009] Preferably, the hollow nozzle is arranged perpendicular to the horizontal direction so that each nozzle hole faces the inner wall of the spinning collection barrel.

[0010] Preferably, the outer diameter of the hollow nozzle is in the range of 1-10 mm, the inner diameter is in the range of 0.1-1 mm, and the length of the hollow nozzle is in the range of 10-100 cm.

[0011] Preferably, the driving member drives the hollow nozzle to rotate at an angular velocity ranging from 0 to 50 rad / s.

[0012] Preferably, the hollow nozzle is located at the exact center of the spinning collection barrel, and the inner diameter of the spinning collection barrel is in the range of 10-30 cm.

[0013] Preferably, the solution feeding mechanism pushes the spinning solution into the hollow nozzle from bottom to top or from top to bottom along the length direction of the hollow nozzle, and the solution feeding mechanism pushes the spinning solution at a speed ranging from 0.1 to 100 ml / min.

[0014] Preferably, the hollow nozzle is made of one or more of stainless steel, copper wire, and aluminum wire, and the diameter of the nozzle hole is in the range of 0.1-1 mm.

[0015] Compared with the prior art, the utility model has the following beneficial effects: spinning liquid is introduced into one end of the hollow nozzle through a spinning collecting barrel and a hollow nozzle, a plurality of arrays of micropores are arranged on the hollow nozzle, and the hollow nozzle itself can rotate at the same time to achieve a more uniform spinning film, and a spinning collecting barrel for electrostatic spinning is provided at a certain distance outside the hollow nozzle, and the hollow nozzle can achieve 360-degree fast and uniform spinning with high spinning quality and efficiency; the structure is simple, easy to process, and the utilization rate of the spinning solution is high, which reduces the waste of the spinning liquid and greatly improves the output and quality of the spinning machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the current hollow multi-dimensional nozzle electrospinning device according to the utility model;

[0017] Figure 2 This is a SEM image of an electrospun nanofiber membrane according to Example 1 of the current hollow multi-dimensional nozzle electrospinning device of the utility model;

[0018] Figure 3 This is a SEM image of the electrospun nanofiber membrane of Example 2 of the current hollow multi-dimensional nozzle electrospinning device according to the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Reference Figure 1-3 , a current hollow multi-dimensional nozzle electrospinning device, comprising:

[0021] A spinning collection barrel 1, which is cylindrical; a hollow nozzle 2 penetrating the bottom of the spinning collection barrel 1 is inserted, and one end of the hollow nozzle 2 is located in the spinning collection barrel 1;

[0022] The hollow nozzle 2 is rod-shaped and hollow inside, and a plurality of spray holes are evenly provided on the surface of the hollow nozzle 2; one end of the hollow nozzle 2 is connected to a driving member, through which the hollow nozzle 2 is driven to rotate 360 ​​degrees in the spinning collection barrel 1; the other end of the hollow nozzle 2 is connected to a solution feeding mechanism, so that while the hollow nozzle 2 is rotating, the spinning solution is continuously filled into the hollow nozzle 2 through the solution feeding mechanism. When the spinning film begins, the hollow nozzle 2 is driven to rotate by the driving member, and at the same time, the solution feeding mechanism pushes the spinning solution into the hollow nozzle 2, so that the spinning film ejected by the hollow nozzle 2 is thinner and more uniform, and the surface of the spinning collection barrel 1 is provided with an inlet slit along the length direction of the spinning collection barrel 1, and the inlet slit is used to enter and exit the spray cloth, and the device can realize winding-type uninterrupted electrostatic spinning. In this application, the driving member can be a motor, and the solution feeding mechanism is also a conventional device, which is not introduced in detail here.

[0023] Furthermore, the hollow nozzle 2 is arranged perpendicular to the horizontal direction so that each nozzle hole faces the inner wall of the spinning collection barrel 1 .

[0024] Furthermore, the outer diameter of the hollow nozzle 2 is in the range of 1-10 mm, the inner diameter is in the range of 0.1-1 mm, and the length of the hollow nozzle 2 is in the range of 10-100 cm.

[0025] Furthermore, when the driving member drives the hollow nozzle 2 to rotate, the angular velocity range is 0-50 rad / s.

[0026] Furthermore, the hollow nozzle 2 is located at the exact center of the spinning collecting barrel 1, and the inner diameter of the spinning collecting barrel 1 is in the range of 10-30 cm.

[0027] Furthermore, the solution feeding mechanism pushes the spinning solution into the hollow nozzle 2 from bottom to top or from top to bottom along the length direction of the hollow nozzle 2, and the solution feeding mechanism pushes the spinning solution at a speed ranging from 0.1 to 100 ml / min.

[0028] Furthermore, the hollow nozzle 2 is made of one or more of stainless steel, copper wire, and aluminum wire, and the diameter of the nozzle hole is in the range of 0.1-1 mm.

[0029] Example 1

[0030] In this example, 20% by mass of polyvinylidene fluoride (PVDF) spinning solution is used to prepare electrospun nanofibers. The specific preparation steps include:

[0031] A1: Add 20 g PVDF powder into 80 mL N,N-dimethylformamide solvent and stir the solution at a stirring rate of 600 r / min for 48 h to completely dissolve the PVDF powder;

[0032] A2: The PVDF solution is injected into the hollow nozzle 2 by the hollow injection method, and the hollow nozzle 2 is rotated 360 degrees in the vertical direction at an angular velocity of 2 rad / s;

[0033] A3: Adjust the voltage of the hollow nozzle 2 to 60 kV, and adjust the distance between the hollow nozzle 2 and the spinning collection barrel 1 to 15 cm;

[0034] A4: The humidity of the spinning space was adjusted to 35% RH and the temperature to 25° C., and the electrospinning was completed and the electrospinning membrane of this example was obtained.

[0035] The microstructure of the electrospun membrane in this example is shown in Figure 2 As shown in the figure, it can be seen that the electrospun membrane in this example is composed of nanofibers, and the diameter range of the nanofibers is mainly distributed between 100-250nm.

[0036] Example 2

[0037] In this example, 15% by mass of polyvinyl alcohol (PVA) spinning solution was used to prepare electrospun nanofibers. The specific preparation steps include:

[0038] A1: Add 15 g of PVA powder into 85 mL of deionized water and stir the solution at a stirring rate of 400 r / min for 24 h to completely dissolve the PVA powder;

[0039] A2: The PVA solution is injected into the hollow nozzle 2 by the hollow injection method, and the hollow nozzle 2 is rotated 360 degrees in the vertical direction at an angular velocity of 5 rad / s;

[0040] A3: Adjust the voltage of the hollow nozzle 2 to 65 kV, and adjust the distance between the hollow nozzle 2 and the spinning collection barrel 1 to 20 cm;

[0041] A4: The humidity of the spinning space was adjusted to 65% RH and the temperature to 25° C., and the electrospinning was completed and the electrospinning membrane of this example was obtained.

[0042] The microstructure of the electrospun membrane in this example is shown in Figure 3 As shown in the figure, it can be seen that the electrospun membrane in this example is composed of nanofibers, and the diameter range of the nanofibers is mainly distributed between 150-800nm.

[0043] The number of devices and processing scale described here are used to simplify the description of the utility model. The application, modification and variation of the utility model are obvious to those skilled in the art.

[0044] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described here.

Claims

1. A current hollow multi-dimensional nozzle electrospinning device, characterized in that: include: A spinning collection barrel (1), the spinning collection barrel (1) is cylindrical; A hollow nozzle (2) penetrating the inside of the spinning collection barrel (1) is inserted into the bottom of the spinning collection barrel (1), and one end of the hollow nozzle (2) is located inside the spinning collection barrel (1); The hollow nozzle (2) is rod-shaped and hollow inside, and a plurality of nozzle holes are evenly arranged on the surface of the hollow nozzle (2); One end of the hollow nozzle (2) is connected to a driving member, and the driving member drives the hollow nozzle (2) to rotate 360 ​​degrees in the spinning collection barrel (1); The other end of the hollow nozzle (2) is connected to a solution feeding mechanism, so that while the hollow nozzle (2) is rotating, the spinning solution is continuously filled into the hollow nozzle (2) through the solution feeding mechanism.

2. A current hollow multi-dimensional nozzle electrospinning device as claimed in claim 1, characterized in that: The hollow nozzle (2) is arranged perpendicular to the horizontal direction so that each nozzle hole faces the inner wall of the spinning collection barrel (1).

3. A current hollow multi-dimensional nozzle electrospinning device as claimed in claim 1, characterized in that: The outer diameter of the hollow nozzle (2) ranges from 1 to 10 mm, the inner diameter ranges from 0.1 to 1 mm, and the length of the hollow nozzle (2) ranges from 10 to 100 cm.

4. The current hollow multi-dimensional nozzle electrospinning device as claimed in claim 1, characterized in that: When the driving member drives the hollow nozzle (2) to rotate, the angular velocity range is 0-50 rad / s.

5. The current hollow multi-dimensional nozzle electrospinning device as claimed in claim 1, characterized in that: The hollow nozzle (2) is located at the exact center of the spinning collection barrel (1), and the inner diameter of the spinning collection barrel (1) is in the range of 10-30 cm.

6. A current hollow multi-dimensional nozzle electrospinning device as claimed in claim 1, characterized in that: The solution feeding mechanism pushes the spinning solution into the hollow nozzle (2) in a direction from bottom to top or from top to bottom along the length direction of the hollow nozzle (2). The solution feeding mechanism pushes the spinning solution in a speed range of 0.1-100 ml / min.

7. The current hollow multi-dimensional nozzle electrospinning device as claimed in claim 1, characterized in that: The hollow nozzle (2) is made of one or more of stainless steel, copper wire, and aluminum wire, and the diameter of the nozzle hole is in the range of 0.1-1 mm.

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