Helical linear electrode electrospinning nozzle and method of use

Abstract

The application discloses a spiral linear electrode electrostatic spinning nozzle and a use method thereof, which comprises an insulating shell and an insulating cover, and a metal block fixed in the inner cavity of the insulating shell; a liquid storage cavity is formed in the interior of the metal block, scraping liquid holes are symmetrically formed on the two sides of the liquid storage cavity, a wire passing hole for a spiral screw rod to penetrate is formed on the side, away from the liquid storage cavity, of the scraping liquid hole and is communicated with the scraping liquid hole; a liquid inlet channel communicated with the liquid storage cavity and a liquid discharge channel communicated with the wire passing hole are formed in the bottom of the metal block; and a pressure increasing assembly for increasing the pressure of the liquid storage cavity is further included; cooperation between the tapered scraping liquid hole and the pressure increasing assembly can efficiently scrape off the electrostatic spinning solution remaining on the surface of the spiral screw rod, ensures uniform coating of the electrostatic spinning solution on the surface of the spiral screw rod, improves the pressure difference in the negative pressure area in cooperation with the pressure increasing assembly, generates a synergistic effect with the tapered scraping liquid hole, and further enhances the suction force, effectively removes the redundant solution, and further improves the liquid coating uniformity of the spiral screw rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrospinning, and discloses a spiral linear electrode electrospinning nozzle and a use method thereof. BACKGROUND

[0002] Electrospinning refers to a process of forming polymer nanofibers by generating and extending a jet of a charged liquid of a polymer solution or a polymer melt when the jet is exposed to a strong external electrostatic field. In the presence of an external force, the stability of the jet of a non-Newtonian fluid changes significantly, resulting in the formation of a very long liquid filament of the polymer. When the electric field on the surface of the polymer solution overcomes the surface tension, electrospinning occurs, so that the charged jet is further elongated into a filament. Electrospun nanofibers show great application potential in the fields of tissue engineering, drug delivery, catalysis, sensors, energy conversion and storage, reinforcement and environmental protection due to their high air / liquid permeability, large surface area to volume ratio, adjustable fiber diameter and easy functionalization.

[0003] People have spent considerable efforts on the manufacture of electrospun nanofibers, but there is still a need for efficient and low-cost technology to produce nanofibers with guaranteed quality. Traditional single-needle electrospinning devices usually use a metal hollow capillary as a spinneret. Since only one jet is excited at a time during the spinning process, the metal hollow capillary is blocked during the spinning process, so the production capacity is limited. Multi-needle electrospinning is one of the main methods to increase the yield of nanofibers. In the spinning process, multiple single needles are assembled according to a specific arrangement to increase the number of nozzles. However, the inherent problems related to multi-needle electrospinning include mutual interference of electric fields and blockage of needles by polymer solutions, which ultimately makes it impossible to implement on a large scale in industry. Therefore, the spinning solution is now coated onto a spiral filament electrode by a special device, high voltage is applied to the spiral filament electrode, and the spinning solution is stretched into a jet filament from the filament electrode to form a fiber.

[0004] For example, a bidirectional spiral electrospinning device is disclosed in Chinese Patent CN107475786B. The device coats the spinning solution onto the spiral filament electrode by a special device, high voltage is applied to the spiral filament electrode, and the spinning solution is stretched into a jet filament from the filament electrode to form a fiber. Although the liquid storage slider can coat the solution onto the linear electrode, the amount of solution coating and the gravity of the solution itself cannot guarantee the uniformity of the solution coating, resulting in poor uniformity of the diameter of the spun nanofibers, which is difficult to meet the actual demand. Therefore, in order to solve the problem of uneven solution coating, a spiral linear electrode electrospinning nozzle and a use method thereof are designed. SUMMARY

[0005] The present application overcomes the deficiencies of the prior art, and provides a spiral linear electrode electrostatic spinning nozzle and a use method thereof.

[0006] To achieve the above object, the present application adopts the technical scheme of a spiral linear electrode electrostatic spinning nozzle, comprising: an insulating shell and an insulating cover, and a metal block fixed in the inner cavity of the insulating shell.

[0007] The metal block is internally provided with a liquid storage cavity, and liquid scraping holes are symmetrically arranged on both sides of the liquid storage cavity, and a wire passing hole for a spiral screw rod to penetrate is arranged on the side of the liquid scraping hole away from the liquid storage cavity and is in communication with the liquid scraping hole.

[0008] The bottom of the metal block is provided with a liquid inlet channel in communication with the liquid storage cavity, and a liquid outlet channel in communication with the wire passing hole, and the liquid outlet channel is symmetrically arranged on both sides of the liquid inlet channel.

[0009] Further comprising a pressure boosting assembly for boosting the pressure of the liquid storage cavity.

[0010] In a preferred embodiment of the present application, the liquid inlet channel and the liquid outlet channel are respectively threadedly connected with a liquid inlet pipe and a liquid outlet pipe.

[0011] In a preferred embodiment of the present application, the wire passing hole penetrates through both ends of the metal block and extends to the outside of the insulating shell, and the wire passing hole and the liquid scraping hole have the same axis.

[0012] In a preferred embodiment of the present application, the liquid scraping hole is tapered, and the angle between the converging wall surface of the liquid scraping hole and the central axis thereof is 10°-25°.

[0013] In a preferred embodiment of the present application, the diameter of the wire passing hole is greater than the maximum diameter of the liquid scraping hole, and the hole diameter of the liquid scraping hole gradually increases from the side away from the liquid storage cavity to the direction of the liquid storage cavity.

[0014] In a preferred embodiment of the present application, the pressure boosting assembly is an air pressure booster, and the air outlet pipe thereof is in communication with the liquid inlet pipe.

[0015] In a preferred embodiment of the present application, a metal cover matched with the liquid storage cavity is arranged above the liquid storage cavity and is fixedly connected with the metal block through bolts, and the bottom surface of the metal cover is provided with a protruding edge and is in sealing cooperation with the liquid storage cavity.

[0016] In a preferred embodiment of the present application, the insulating shell and the insulating cover are made of polytetrafluoroethylene material, and the metal block and the metal cover are made of stainless steel material.

[0017] A method for using a spiral linear electrode electrospinning nozzle, using the spiral linear electrode electrospinning nozzle described above, comprising the following steps:

[0018] S1, assemble the electrospinning nozzle, pass through the wire hole and fit on the spiral lead screw, keep the axis of the wire hole and the axis of the spiral lead screw in the same position;

[0019] S2, connect the liquid inlet pipe with the three-way joint, input the electrospinning solution into the liquid storage cavity through the three-way joint, and connect the air outlet pipe of the air pressurizer with the three-way joint;

[0020] S3, control the air pressurizer to pressurize the liquid storage cavity, so that the pressure difference appears between the inside and outside of the cavity, at the same time, drive the electrospinning nozzle to move left and right on the spiral lead screw through the driving device, the spiral lead screw passes through the liquid scraping hole and the wire hole at both ends of the liquid storage cavity, the electrospinning solution is uniformly coated on the spiral wire in the liquid storage cavity, at the same time, the diameter of the liquid scraping hole gradually decreases, a relative negative pressure area is generated, the negative pressure area generates suction, and the excess solution on the surface of the spiral lead screw is scraped off and flows into the liquid discharge pipe on both sides of the liquid inlet pipe.

[0021] In a preferred embodiment of the present application, in the S2, a one-way valve is installed at each pipe position of the three-way joint.

[0022] The present application solves the defects in the background art, and has the following beneficial effects:

[0023] The present application provides a spiral linear electrode electrospinning nozzle and a method for using the same, which utilizes the cooperation between the tapered liquid scraping hole and the pressurizing assembly, forms a "liquid straw effect" through the tapered liquid scraping hole, so that the diameter of the liquid scraping hole continuously decreases during the scraping process, a relative negative pressure area is generated, the negative pressure area generates suction, the residual electrospinning solution on the surface of the spiral lead screw can be efficiently scraped off, the uniform coating of the electrospinning solution on the surface of the spiral lead screw is ensured, which helps to improve the stability and consistency of the subsequent electrospinning process.

[0024] The present application provides a spiral linear electrode electrospinning nozzle and a method for using the same, which utilizes the pressurizing assembly to increase the air pressure in the liquid storage cavity, so that the electrospinning solution receives a greater driving force and flows more uniformly in the liquid storage cavity, the flow resistance is reduced, which helps the electrospinning solution to more uniformly cover the surface of the spiral lead screw, and ensures the stability and consistency of the coating.

[0025] The application provides a spiral linear electrode electrospinning nozzle and a use method thereof.

[0026] The application provides a spiral linear electrode electrospinning nozzle and a use method thereof.

[0027] The application provides a spiral linear electrode electrospinning nozzle and a use method thereof. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0029] Figure 1 is a structure exploded schematic view of the electrospinning nozzle of the preferred embodiment of the present application;

[0030] Figure 2 is a front cross-sectional structure schematic view of the electrospinning nozzle of the preferred embodiment of the present application;

[0031] Figure 3 is a front cross-sectional structure schematic view of the metal block of the preferred embodiment of the present application;

[0032] Figure 4 is a structure schematic view of the electrospinning nozzle installation equipment of the preferred embodiment of the present application.

[0033] In the figure: 1, insulating shell; 2, insulating cover; 3, metal block; 4, liquid storage cavity; 5, liquid scraping hole; 6, wire hole; 7, liquid inlet pipe; 8, liquid outlet pipe; 9, metal cover. DETAILED DESCRIPTION

[0034] Clearly, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0035] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, other than those described herein. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified and limited, the term "a plurality of" means two or more.

[0037] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] As shown in Figure 1 and Figure 2 A spiral linear electrode electrospinning nozzle, comprising: an insulating shell 1 and an insulating cover 2, and a metal block 3 fixed in the inner cavity of the insulating shell 1.

[0039] The inner part of the metal block 3 is provided with a liquid storage cavity 4, and the inner part of the liquid storage cavity 4 is used to store electrospinning solution.

[0040] The liquid scraping hole 5 is tapered, and the aperture of the liquid scraping hole 5 gradually increases from the side away from the liquid storage cavity 4 to the direction of the liquid storage cavity 4, so that the aperture of the liquid scraping hole 5 gradually decreases during the movement of the electrospinning nozzle for coating the helical screw rod, and the fluid flow is limited due to the decrease of the aperture, and according to Bernoulli's law, the pressure of the fluid decreases when the flow rate increases;

[0041] Therefore, in the area with a reduced aperture, the pressure of the electrospinning solution decreases to form a relatively negative pressure area, so that the pressure difference between this area and the liquid storage cavity 4 is generated, and the pressure difference drives the electrospinning solution to flow to the negative pressure area, so that the electrospinning solution remaining on the surface of the helical screw rod can be efficiently scraped off, and the uniformity of the electrospinning solution coated on the surface of the helical screw rod is ensured, which helps to improve the stability and consistency of the subsequent electrospinning process.

[0042] As shown in Figure 3 The liquid scraping hole 5 is tapered, and the aperture of the liquid scraping hole 5 gradually increases from the side away from the liquid storage cavity 4 to the direction of the liquid storage cavity 4, so that the aperture of the liquid scraping hole 5 gradually decreases during the movement of the electrospinning nozzle for coating the helical screw rod, and the fluid flow is limited due to the decrease of the aperture, and according to Bernoulli's law, the pressure of the fluid decreases when the flow rate increases;

[0043] It is worth mentioning that the angle between the contraction wall surface of the liquid scraping hole 5 and the central axis is 10°-25°, and the liquid scraping holes with different angles between the contraction wall surface and the central axis are changed, and the efficiency of the electrospinning solution coated on the helical screw rod is different, and the following experiments are carried out according to the different angles between the contraction wall surface and the central axis of the liquid scraping hole 5.

[0044] Four metal blocks in the present scheme are prepared, the liquid scraping holes in each metal block have different contraction angles (10°, 15°, 20°, 25°), and are sequentially recorded as samples 1-4, as well as the same specification of the helical screw rod, the electrospinning solution, the air pressure device, and the driving device. Embodiment

[0045] The metal block with the angle between the contraction wall surface of the liquid scraping hole and the central axis of 10° (sample 1) is sleeved on the helical screw rod, the air pressure device is controlled to increase the pressure in the metal block, and the pressure in the liquid storage cavity of the metal block is kept constant, the driving device is used to drive the metal block to move, the spinning effect of each group of nozzles is observed and recorded, and the uniformity of the solution coated on the helical screw rod is detected by using a surface roughness instrument.

[0046] The implementation column two, with the example operation is basically the same, different is, select the liquid scraping hole shrink wall surface and the angle of the central axis of the metal block (sample 2) is 15 DEG, the internal electrospinning solution is coated on the spiral screw rod, and is scraped, and the spinning effect is observed and recorded, and the uniformity of the solution coated on the spiral screw rod is detected by using the surface roughness instrument.

[0047] The implementation column three, with the example operation is basically the same, different is, select the liquid scraping hole shrink wall surface and the angle of the central axis of the metal block (sample 3) is 20 DEG, the internal electrospinning solution is coated on the spiral screw rod, and is scraped, and the spinning effect is observed and recorded, and the uniformity of the solution coated on the spiral screw rod is detected by using the surface roughness instrument.

[0048] The implementation column four, with the example operation is basically the same, different is, select the liquid scraping hole shrink wall surface and the angle of the central axis of the metal block (sample 4) is 25 DEG, the internal electrospinning solution is coated on the spiral screw rod, and is scraped, and the spinning effect is observed and recorded, and the uniformity of the solution coated on the spiral screw rod is detected by using the surface roughness instrument.

[0049] Based on the above example, the shear force of the electrospinning solution through the liquid scraping hole is detected by using the rheometer, the flow rate of the electrospinning solution through the liquid scraping hole is detected by using the flow meter, so as to detect the coating rate, as shown in table 1;

[0050] Table 1:

[0051] In summary, as the angle between the contraction wall surface of the liquid scraping hole and the central axis thereof decreases, the shear force on the liquid scraping position of the electrospinning solution passing through the liquid scraping hole gradually increases, the larger shear force helps to more uniformly coat the solution on the spiral screw rod, and at this time the flow rate of the electrospinning solution passing through the liquid scraping position of the liquid scraping hole continuously increases, thereby improving the coating rate, and as the angle between the contraction wall surface of the liquid scraping hole and the central axis thereof reaches a certain value, i.e., the angle between the contraction wall surface of the liquid scraping hole and the central axis thereof is 20°, the shear force continues to decrease, mainly because the cross-sectional area of the liquid scraping hole at both ends is relatively large, thus the cross-sectional area of the liquid scraping hole at both ends decreases relatively greatly, resulting in an increase in the flow resistance of the electrospinning solution at the liquid scraping position of the liquid scraping hole, thereby continuously decreasing the flow rate of the electrospinning solution passing through the liquid scraping position of the liquid scraping hole, so as to decrease the shear force, and at the same time, the roughness (uniformity) of the electrospinning solution coated on the spiral screw rod also increases with the increase in the flow rate, and decreases with the decrease in the flow rate, mainly because when the angle between the contraction wall surface of the liquid scraping hole and the central axis thereof is relatively large, the flow resistance of the electrospinning solution at the liquid scraping position of the liquid scraping hole increases, and in this process, vortexes occur, resulting in a decrease in the uniformity of the electrospinning solution coated on the spiral screw rod; therefore, in the above embodiment, the metal block with the angle between the contraction wall surface of the liquid scraping hole and the central axis thereof being 20° is preferred, and thus the third embodiment is the most preferred embodiment of the present application.

[0052] The bottom of the metal block 3 is provided with a liquid inlet channel communicated with the liquid storage cavity 4, and a liquid discharge channel communicated with the wire passing hole 6, the liquid discharge channel is symmetrically provided on both sides of the liquid inlet channel, the liquid inlet channel and the liquid discharge channel are respectively threadedly connected with a liquid inlet pipe 7 and a liquid discharge pipe 8, the liquid discharge pipe 8 is communicated with the liquid collecting tank, so as to facilitate the recovery of the excess electrospinning solution;

[0053] Considering that the tapered liquid scraping hole 5 can efficiently scrape the residual electrospinning solution on the surface of the spiral screw rod, thereby ensuring the uniform coating of the electrospinning solution on the surface of the spiral screw rod, but the hole formed between the minimum aperture position of the tapered liquid scraping hole 5 and the spiral screw rod is relatively small, which may limit the flow of the electrospinning solution, thereby causing the electrospinning solution to form uneven flow when passing through the hole, and thus causing uneven coating, therefore, the liquid storage cavity is further provided with a pressurizing assembly for pressurizing the liquid storage cavity, the pressurizing assembly is an air pressurizer, and the air outlet pipe thereof is communicated with the liquid inlet pipe 7;

[0054] By increasing the pressure in the liquid storage cavity 4, the electrospinning solution in the liquid storage cavity 4 will be subjected to greater driving force, so that it flows more uniformly in the liquid storage cavity 4, reduces the flow resistance, increases the dynamic of the electrospinning solution, helps to overcome the flow restriction caused by the reduction of the hole diameter, so that the solution can flow more smoothly through the tapered liquid scraping hole 5, so that the tapered liquid scraping hole 5 can efficiently scrape the electrospinning solution remaining on the surface of the spiral screw, ensuring the uniform coating of the electrospinning solution on the surface of the spiral screw, and helping the electrospinning solution to cover the surface of the spiral screw more uniformly, ensuring the stability and consistency of the coating.

[0055] It should be noted that when the electrospinning nozzle is needed to be used to coat the electrospinning solution on the spiral screw, the electrospinning solution is introduced into the liquid storage cavity 4 through the liquid inlet pipe 7, and the air pressure device is used to increase the pressure of the liquid storage cavity 4, and the electrospinning nozzle is driven to move on the spiral screw by an external driving device, such as Figure 4 As shown, the electrospinning solution in the liquid storage cavity 4 is coated on the spiral screw, and the tapered liquid scraping hole 5 on the electrospinning nozzle will continuously reduce the diameter during the movement of the driving device, generating a relatively negative pressure area, and the negative pressure area will generate suction force to scrape the excess electrospinning solution on the spiral screw, thereby controlling the coating amount of the electrospinning solution on the spiral screw, and further improving the uniformity of the electrospinning solution coating. At the same time, during the movement of the driving device, the air pressure device increases the pressure in the liquid storage cavity 4, further increasing the pressure difference between the liquid storage cavity 4 and the negative pressure area, so that the electrospinning solution flows more uniformly in the liquid storage cavity 4, reduces the flow resistance, increases the dynamic of the electrospinning solution, makes the solution form a uniform coating, and better adheres to the spiral screw.

[0056] In a preferred embodiment of the present application, the upper part of the liquid storage cavity 4 is provided with a metal cover 9 matched therewith, and is fixedly connected with the metal block 3 through bolts, and the bottom surface of the metal cover 9 is provided with a protruding edge in sealing cooperation with the liquid storage cavity 4. The metal cover 9 and the protruding edge on the bottom surface thereof ensure the sealing of the electrospinning solution in the liquid storage cavity 4, reduce the contact of the solution with air, and ensure the purity of the electrospinning solution.

[0057] In a preferred embodiment of the present application, the insulating shell 1 and the insulating cover 2 are made of polytetrafluoroethylene material, and the metal block 3 and the metal cover 9 are made of stainless steel material.

[0058] A use method of a spiral linear electrode electrospinning nozzle, using the above-mentioned spiral linear electrode electrospinning nozzle, comprising the following steps:

[0059] S1, assemble the electrospinning nozzle, pass through the wire hole 6 and fit on the spiral screw rod, keep the axis of the wire hole 6 and the axis of the spiral screw rod in the same position;

[0060] S2, connect the liquid inlet pipe 7 with the three-way joint, input the electrospinning solution into the liquid storage cavity 4 through the three-way joint, and connect the air outlet pipe of the air pressurizer with the three-way joint;

[0061] S3, control the air pressurizer to pressurize the liquid storage cavity 4, so that the pressure difference appears between the inside and outside of the cavity of the liquid storage cavity 4, at the same time, drive the electrospinning nozzle to move left and right on the spiral screw rod by the driving device, the spiral screw rod passes through the liquid scraping hole 5 and the wire hole 6 at both ends of the liquid storage cavity 4, the electrospinning solution is uniformly coated on the spiral screw in the liquid storage cavity 4, the diameter of the liquid scraping hole 5 gradually reduces while the electrospinning nozzle moves, a relative negative pressure area is generated, the negative pressure area generates suction, and the excess solution on the surface of the spiral screw rod is scraped off and flows into the liquid discharge pipe 8 on both sides of the liquid inlet pipe 7 in cooperation with the high pressure of the liquid storage cavity 4.

[0062] In a preferred embodiment of the present application, in S2, a one-way valve is installed at each pipe position of the three-way joint, the one-way valve is arranged to avoid the backflow of the electrospinning solution in the liquid storage cavity 4 during the pressurization of the liquid storage cavity 4.

[0063] When the present application is used, the electrospinning nozzle is assembled, passes through the wire hole 6 and fits on the spiral screw rod, keeps the axis of the wire hole 6 and the axis of the spiral screw rod in the same position, the electrospinning solution is input into the liquid storage cavity 4 through the liquid inlet pipe 7, the liquid storage cavity 4 is pressurized by the air pressurizer, the electrospinning nozzle moves on the spiral screw rod by the external driving device, the electrospinning solution in the liquid storage cavity 4 is coated on the spiral screw rod, the tapered liquid scraping hole 5 on the electrospinning nozzle continuously reduces the diameter of the liquid scraping hole 5 during the movement of the electrospinning nozzle driven by the driving device, a relative negative pressure area is generated, the negative pressure area generates suction, and the excess electrospinning solution on the spiral screw rod is scraped off, at the same time, the pressurization of the liquid storage cavity 4 by the air pressurizer during the movement of the electrospinning nozzle driven by the driving device further increases the pressure difference between the liquid storage cavity 4 and the negative pressure area, so that the electrospinning solution flows more uniformly in the liquid storage cavity 4 and can better adhere to the spiral screw rod.

[0064] According to the ideal embodiment of the present application, the above description can be varied and modified without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined by the scope of the claims.

Claims

1. A spiral linear electrode electrospinning nozzle, comprising: An insulating outer shell and an insulating cover, and a metal block fixed inside the insulating outer shell, characterized in that, The metal block has a liquid storage cavity inside, and scraping holes are symmetrically opened on both sides of the liquid storage cavity. A wire feeding hole is opened on the side of the scraping hole away from the liquid storage cavity for the spiral screw to pass through, and is connected to the scraping hole. The bottom of the metal block is provided with an inlet channel communicating with the liquid storage chamber and a drain channel communicating with the wire feeding hole. The drain channels are symmetrically opened on both sides of the inlet channel. It also includes a pressurization assembly for pressurizing the liquid storage chamber; The scraper hole is designed to be tapered, and the angle between the tapered wall of the scraper hole and its central axis is 10° to 25°. The diameter of the wire feeding hole is larger than the maximum diameter of the scraping hole, and the diameter of the scraping hole gradually increases from the side away from the liquid storage cavity toward the liquid storage cavity.

2. The spiral linear electrode electrospinning nozzle according to claim 1, characterized in that: The inlet channel and the outlet channel are respectively threadedly connected to an inlet pipe and an outlet pipe.

3. The spiral linear electrode electrospinning nozzle according to claim 1, characterized in that: The wire feed hole passes through both ends of the metal block and extends to the outside of the insulating shell, and the wire feed hole and the scraper hole have the same axis.

4. The spiral linear electrode electrospinning nozzle according to claim 2, characterized in that: The pressurization component is an air compressor, and its air outlet is connected to the liquid inlet.

5. The spiral linear electrode electrospinning nozzle according to claim 1, characterized in that: The liquid storage chamber is equipped with a metal cover that matches it, and is fixedly connected to the metal block by bolts. The bottom surface of the metal cover has protruding edges that seal with the liquid storage chamber.

6. The spiral linear electrode electrospinning nozzle according to claim 5, characterized in that: The insulating outer shell and insulating cover are both made of polytetrafluoroethylene, while the metal block and metal cover are made of stainless steel.

7. A method of using a spiral linear electrode electrospinning nozzle, comprising using a spiral linear electrode electrospinning nozzle according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Assemble the electrostatic spinning nozzle and thread it onto the spiral screw through the wire feeding hole, keeping the axis of the wire feeding hole and the axis of the spiral screw in the same position. S2. Connect the liquid inlet pipe with a three-way connector to input the electrospinning solution into the liquid storage chamber through the three-way connector, and connect the air outlet pipe of the air compressor to the three-way connector. S3. The air pressurizer is controlled to pressurize the liquid storage chamber, creating a pressure difference between the inside and outside of the chamber. Simultaneously, the electrospinning nozzle is driven by the drive device to move left and right at the position of the spiral screw. The spiral screw passes through the scraping holes and wire feeding holes at both ends of the liquid storage chamber. The electrospinning solution is evenly coated on the spiral screw in the liquid storage chamber. As the electrospinning nozzle moves, the diameter of the scraping hole gradually decreases, creating a relatively negative pressure area. The negative pressure area generates suction, which, together with the high pressure in the liquid storage chamber, scrapes off the excess solution on the surface of the spiral screw and flows into the drain pipes on both sides of the inlet pipe.

8. The method of using a spiral linear electrode electrospinning nozzle according to claim 7, characterized in that: In S2, a check valve is installed at each pipe position of the tee joint.

Images