A low-interference multi-nozzle spinning module for electrostatic air-jet spinning

Abstract

This invention relates to a low-interference multi-nozzle spinning module for electrostatic air-jet spinning, belonging to the technical field of solution spinning devices. It includes a spinneret comprising a plate body; an inner insulating flow channel disposed within the plate body along its length; a supply air channel disposed within the plate body along its length; multiple neck-type liquid supply grooves disposed within the plate body, each neck-type liquid supply groove having one end connected to the inner insulating flow channel and the other end connected to the supply air channel; multiple air supply ports disposed on the side of the plate body along its length, the multiple air supply ports being connected to the supply air channel; a coaxial nozzle assembly disposed below the plate body; and an anti-interference device disposed below the plate body. Compared with existing technologies, this invention solves the problems of difficulty in increasing spinning density, poor spinning jet stability, and difficulty in controlling the morphological uniformity of the prepared fiber material in electrostatic air-jet spinning.

Description

Technical Field

[0001] This invention relates to the field of solution spinning equipment technology, and more specifically to a low-interference multi-nozzle spinning module for electrostatic air-jet spinning. Background Technology

[0002] Electrostatic air-jet spinning has become a promising technology for preparing high-performance ultrafine fiber materials due to its advantages such as simple operation, low cost, wide range of applicable raw materials, and higher spinning efficiency compared to traditional electrostatic spinning. Ultrafine fiber materials prepared by electrostatic air-jet spinning exhibit advantages such as a wide diameter distribution, adjustable porosity, and good mechanical properties, and are expected to be widely used in personal protective equipment, energy and chemical industries, national defense, and aerospace. However, existing electrostatic air-jet spinning equipment suffers from low nozzle density, and the mismatch between the airflow field, electrostatic field, and jet motion in the spinning region leads to poor morphology and difficulty in controlling the uniformity of the resulting fiber materials.

[0003] Currently, some researchers in this field have conducted studies. Patent CN201810373763.9 discloses a ventilated electrospinning device and method, including a spinneret assembly, an air guide tube, a liquid guide tube, a spinning needle, and a liquid storage device. While this invention can create a vortex-like spiral wind by setting through holes in a cylinder to allow gas to flow into the cylinder and collide with the cylinder wall, thus twisting the fibers during spinning to improve the strength of the fiber material, the airflow design of this device easily leads to strong airflow field interference between different nozzles, making it difficult to control the morphology of the fiber material. Patent ZL201510100625.X discloses a tornado-style electrospinning nozzle device for preparing nano-twisted yarns, including an airflow duct, a spinning cylinder, connectors, a wind tunnel, an air compressor, an orifice electrode plate, a high-voltage electrostatic generator, a twist collecting roller, a twist holding turntable, tangential airflow holes, screws, a heating coil, and a temperature sensor. Although this device can prepare ultrafine fiber materials at high speed, it is only suitable for preparing ultrafine twisted yarns, with a single function. Patent ZL201510003381.3 discloses a method and apparatus for preparing nanofibers by air-blown parallel spiral steel wire electrospinning, including a fiber preparation system, an air-blowing system, and a fiber receiving system. Although this invention can achieve the preparation of ultrafine fiber materials, the jet generated by this apparatus and method is on a parallel spiral steel wire coated with a solution, resulting in uncontrollable spinning density, and the high-speed airflow field cannot control a single jet. Patent ZL201811009580.5 discloses an electrospinning apparatus and method based on Bernoulli's principle, including a high-voltage electrostatic generator, a liquid supply component, an air supply component, a spinneret component, and a fiber collecting component. Although this apparatus has a heating device for the spinning airflow temperature, making the spinning nozzle less prone to clogging, it does not have an anti-interference design for adjacent spinning jets in the spinning area, and cannot effectively prevent the airflow from different nozzles from interfering with the jet, resulting in poor uniformity of the obtained ultrafine fiber material. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one of the problems of electrostatic air-jet spinning, such as difficulty in increasing spinning density, poor stability of spinning jet, and difficulty in controlling the morphological uniformity of the prepared fiber material, and to provide a low-interference multi-nozzle spinning module for electrostatic air-jet spinning.

[0005] This invention employs an array-type spinneret arrangement, a vortex-type inner conical coaxial nozzle, and an anti-interference device. Through optimized design of the power and air supply modules during electrostatic air-jet spinning, it solves the problem of difficulty in increasing the nozzle arrangement density on the spinneret while ensuring stable spinning. By utilizing the inner conical flow-collecting nozzle and the obstructing fluid to generate an airflow vortex that matches the jet trajectory, the spinning rate and production stability of the electrostatic air-jet spinning nozzle can be significantly improved. An adjustable electric field deflection device is used to correct the direction of the spinning jet, aiming to solve the problem of uneven spinning caused by the deviation of the electric field direction at the edge of the spinneret.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A low-interference multi-nozzle spinning module for electrostatic air-jet spinning, comprising:

[0008] A spinneret includes: a spinneret body; an inner insulating flow channel disposed within the spinneret body along the length of the spinneret body, one end of the inner insulating flow channel being connected to a liquid supply port disposed on the side of the spinneret body; a liquid supply channel disposed within the spinneret body along the length of the spinneret body, the liquid supply channel being located below the inner insulating flow channel; a plurality of neck-type liquid supply grooves disposed within the spinneret body, the plurality of neck-type liquid supply grooves being spaced apart between the inner insulating flow channel and the liquid supply channel along the length of the spinneret body, one end of each neck-type liquid supply groove being connected to the inner insulating flow channel and the other end being connected to the liquid supply channel; and a plurality of air supply ports disposed on the side of the spinneret body along the length of the spinneret body, the plurality of air supply ports being connected to the liquid supply channel.

[0009] A coaxial nozzle assembly disposed below the plate body, the coaxial nozzle assembly comprising multiple coaxial nozzles spaced apart along the length of the plate body, one end of each coaxial nozzle extending into the plate body and connected to the air supply channel; and

[0010] An anti-interference device is installed below the plate. The anti-interference device includes two pendulum mounting seats symmetrically arranged on both sides of the coaxial nozzle assembly. One end of each pendulum mounting seat is fixed below the plate, and the other end is provided with an electric field deflection pendulum assembly.

[0011] In this invention, the liquid supply port is located at the center of the side of the spinneret and is connected to the inner insulating flow channel. After entering the inner insulating flow channel, the spinning liquid flows through the neck-type liquid supply tank set at a fixed distance below, supplying liquid to the metal spinning liquid nozzle of the vortex-type inner conical coaxial nozzle connected below the liquid supply tank.

[0012] In this invention, the lower part of the neck-type liquid supply tank is connected to the air supply channel, and the metal spinning liquid nozzle is connected to the lower part of the neck-type liquid supply tank and sealed at the point where it communicates with the air supply channel to prevent airflow from flowing back into the liquid supply pipe.

[0013] In this invention, the air supply ports are arranged in a fixed-distance array on the front of the spinneret and connected to the air supply channel. The air supply nozzle base connected below the air supply channel is a vortex-type inner cone coaxial nozzle for supplying air.

[0014] Furthermore, the spinneret also includes a high-voltage power supply, a power supply system, and multiple highly conductive electrodes;

[0015] Multiple highly conductive electrodes are disposed within the plate body and positioned above the inner insulating flow channel;

[0016] The number of the multiple highly conductive electrodes is the same as the number of the neck-type liquid supply tanks, and each highly conductive electrode is positioned opposite to the corresponding neck-type liquid supply tank so that the spinning solution extruded from the coaxial nozzle is charged.

[0017] Each of the highly conductive electrodes is electrically connected to a high-voltage power supply via a power supply system.

[0018] In this invention, a high-voltage power supply is located above the spinneret and connected to the power supply system. The power supply system is connected to a high-conductivity electrode, which is fixed above the inner insulating flow channel and opposite to the neck-type liquid supply tank, so that the charged spinning solution is ejected from the metal spinning solution nozzle.

[0019] spinneret :

[0020] In this invention, the length of the spinneret ranges from 600 to 3000 mm;

[0021] In this invention, multiple coaxial nozzles are arranged in parallel below the spinneret, and the distance between the centers of two connected coaxial nozzles is 20-50 mm.

[0022] In this invention, the number of coaxial nozzles on the spinneret is 30 to 120;

[0023] In this invention, the number of neck-type liquid supply tanks and the number of coaxial nozzles are the same and their positions are arranged accordingly;

[0024] In this invention, the connection between the inner insulating flow channel and the neck-type liquid supply tank is a right-angled arc.

[0025] In this invention, the neck-type liquid supply tank has a conical structure, and the diameter of the end connected to the inner insulating flow channel is larger than the diameter of the end connected to the supply flow channel.

[0026] In this invention, the infusion rate of the liquid supply port ranges from 300 to 9600 mL / h;

[0027] In this invention, the liquid supply rate of each coaxial nozzle is 10-80 mL / h;

[0028] In this invention, the voltage range applied by the high-voltage power supply is 0–150 kV;

[0029] In this invention, the airflow velocity applied at the air supply port ranges from 0 to 25 m / s;

[0030] In this invention, the inner wall of the inner insulating flow channel is coated with an insulating coating material, which is one or more of polystyrene, polytetrafluoroethylene, phenolic resin, siloxane, aluminum silicate, or aluminum oxide.

[0031] In this invention, the high conductivity electrode is made of an alloy composed of one or more of copper, iron, cobalt, nickel, silver or aluminum, preferably a copper-silver alloy or a copper-aluminum alloy.

[0032] In this invention, the plate is made of a high-strength, high-temperature resistant, and solvent-resistant material, including one or more of silicon dioxide, aluminum oxide, zirconium oxide, titanium dioxide, mullite, polyetheretherketone, polytetrafluoroethylene, polyamide, or liquid crystal polymer.

[0033] Furthermore, the coaxial nozzle is a vortex-type inner cone coaxial nozzle, comprising: a metal spinning solution nozzle disposed on the lower end face of the plate, the metal spinning solution nozzle being connected to a neck-type liquid supply groove; an air supply nozzle base fitted on the metal spinning solution nozzle, the air supply nozzle base being embedded in the plate and connected to the air supply channel; and an inner cone-shaped flow collector nozzle mounted on the mounting surface of the air supply nozzle base, the inner cone-shaped flow collector nozzle being fitted on the metal spinning solution nozzle, the inner cone-shaped flow collector nozzle having a flow-blocking element arranged radially at its cone tip.

[0034] More specifically, the inner cone-shaped flow collector nozzle has an inner cone shape on its inner side, which allows the airflow to concentrate towards the center of the nozzle. The inner cone-shaped flow collector nozzle has a choke fluid arranged radially at its cone tip. When the airflow passes through the choke fluid, a Karman vortex effect is generated. The airflow divided into two sides by the choke fluid generates an unstable vortex, thereby enhancing the whipping of the jet. In other words, when the airflow passes through the choke fluid and is ejected from the inner cone-shaped flow collector nozzle, a high-speed vortex can be formed at the nozzle, which can greatly increase the speed of the airflow at the nozzle and dissipate it quickly in a very short distance, so that the airflow does not affect the whipping and stretching of the jet in the electrostatic field.

[0035] Furthermore, the cross-section of the fluid-blocking material is one of a square, rectangular, triangular, or irregular cross-section; the equivalent diameter of the fluid-blocking cross-section is 1 to 5 mm.

[0036] Furthermore, a nozzle height adjustment device is also provided between the air supply nozzle base and the inner conical flow collector nozzle.

[0037] Furthermore, the nozzle height adjustment device includes a first set of connecting pipes and a second set of connecting pipes connected by threads. The first set of connecting pipes is connected to the air supply nozzle base, and the second set of connecting pipes is connected to the inner conical flow collecting nozzle. The inner conical flow collecting nozzle is raised or lowered relative to the air supply nozzle base by rotating the threads clockwise or counterclockwise.

[0038] coaxial nozzle :

[0039] In this invention, the inner conical flow collector nozzle is conical, and the semi-cone angle is at least 33°;

[0040] In this invention, the inner diameter of the metal spinning solution nozzle is 0.2–3 mm;

[0041] In this invention, the top of the metal spinning solution nozzle protrudes 0.1 to 15 mm beyond the outer wall of the inner conical collector nozzle;

[0042] In this invention, the air supply nozzle base, height adjustment device, and inner cone-shaped collector nozzle are made of one or more of the following materials: silicon dioxide, aluminum oxide, zirconium oxide, titanium oxide, mullite, silicate materials, rubber, polyetheretherketone, polytetrafluoroethylene, polyamide, or liquid crystal polymer.

[0043] In this invention, the metal spinning solution nozzle is made of an alloy composed of one or more of copper, iron, cobalt, nickel, silver, or aluminum, preferably a copper-silver alloy or a copper-aluminum alloy.

[0044] In this invention, the pendulum telescopic bracket is made of one or more of polyurethane, polyimide, polyethylene, polystyrene, epoxy resin or phenolic resin.

[0045] In this invention, the electric field deflection pendulum is made of one or more of the following materials: stainless steel, aluminum, aluminum alloy, tungsten, tungsten alloy, nickel, nickel alloy, copper, or copper alloy.

[0046] Furthermore, the electric field deflection pendulum assembly includes a pendulum telescopic bracket, a universal joint, a pendulum connecting spring, and an electric field deflection pendulum;

[0047] One end of the pendulum telescopic bracket is connected to the pendulum mounting base, and the other end is equipped with a universal joint. One end of the electric field deflecting pendulum is connected to the universal joint, and the other end is connected to the electric field deflecting pendulum. The electric field deflecting pendulum will become polarized under the electric field, which will affect the magnitude and direction of the electric field. By controlling the position of the electric field deflecting pendulum, the deflection electric field is corrected, so that the jet spray attitude is stabilized and does not deflect to the sides of the spinneret.

[0048] Electric field deflection pendulum assembly:

[0049] In this invention, the pendulum mounting base is detachably connected to the plate body;

[0050] In this invention, the electric field deflection pendulum is a hollow metal sphere;

[0051] In this invention, the swing angle of the electric field deflection pendulum is 0 to 360°;

[0052] In this invention, the pendulum connecting spring is made of an insulating material with adjustable length;

[0053] In this invention, the extension length of the pendulum connecting spring is 5 to 20 mm.

[0054] The low-interference multi-nozzle spinning module for electrostatic air-jet spinning described above uses a spinning solution that is a solution in which a polymer is dissolved in a corresponding good solvent, or an inorganic sol. The polymer is polyvinyl chloride, polyethylene terephthalate, polyethylene oxide, polycaprolactone, poly(p-phenylene terephthalamide), polyarylamide, polystyrene-polypropylene, polyetherimide, polyvinylidene fluoride, polyamide, polyethylene, polyglyoxal, polybenzimidazole, poly(m-phenylene terephthalamide), polyimide, polyhydroxybutyrate, or polycarbonate. The inorganic sol is one or a combination of several of the following: poly(p-phenylene acetylene), polyvinylidene fluoride, polypyrrolidone, polymethyl methacrylate, polyacrylonitrile, polyurethane, polyacrylic acid, phenolic resin, polyvinyl butyral, polylactic acid, polybutylene succinate, polyethylene glycol, polylactic-caprolactone, polybenzoxazine, polytrihydroxybutyrate, polyaniline, polyacrylamide, polyvinylidene fluoride, polyether ether ketone, polypropylene terephthalate, polyvinyl acetate, polyvinyl alcohol, and polyethylene oxide; and the inorganic sol is silicon-based, aluminum-based, zirconium-based, titanium-based, or a mixture thereof.

[0055] The technical principle of this invention is as follows:

[0056] Under pressure, the spinning solution is uniformly delivered from the inlet to the spinning solution nozzle through a neck-type supply tank. The injection rate of the spinning solution is adjusted according to its viscosity, conductivity, and other properties, as well as the desired fiber morphology. The spinning voltage is conducted from a high-voltage DC electrostatic generator to a highly conductive electrode, giving the spinning solution a uniform charge and transmitting the voltage to the highly conductive spinning solution nozzle. Simultaneously, an airflow enters the air inlet at a certain pressure and is ejected through an inner conical coaxial nozzle. The ejected airflow is forced to bypass the obstruction fluid, creating a Karman vortex effect on both sides of the obstruction fluid. This results in the periodic generation of double-row vortex airflows with opposite rotation directions and regular arrangement on both sides of the obstruction fluid. The jet is stretched and refined under the combined action of the electric field and the vortex currents. The synergistic effect of the electric field and the Karman vortex currents ultimately increases the spinning speed while ensuring the quality of the fiber material production (diameter, morphology, uniformity). In addition, due to the superposition of electric fields on both sides of the spinneret, the jets deflect outwards, affecting the spinning quality. By utilizing the polarization effect of the electric field deflection pendulum in the electric field, the direction of the jets is adjusted until the direction of all jets in the spinning area tends to be parallel, and finally, continuous ultrafine fibers with uniform diameter and shape are obtained efficiently and stably.

[0057] Compared with the prior art, the present invention has the following advantages:

[0058] (1) A low-interference multi-nozzle spinning module for electrostatic gas jet spinning of the present invention has a vortex enhancement effect. By setting a flow barrier at the front end of the gas nozzle and adjusting the height of the spinning liquid nozzle, the vortex and electric field work together to stretch and refine the jet, thereby achieving high-quality high-speed spinning.

[0059] (2) The present invention provides a low-interference multi-nozzle spinning module for electrostatic air-jet spinning, which reduces charge dissipation through an internally insulated spinning liquid flow channel, makes the spinning liquid uniformly charged, and achieves uniform supply of spinning liquid through a neck-type liquid supply tank.

[0060] (3) The present invention provides a low-interference multi-nozzle spinning module for electrostatic air jet spinning, which uses the polarization phenomenon of the electric field deflection device in the electric field to correct the jet and improve the spinning quality. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of a low-interference multi-nozzle spinning module for electrostatic air-jet spinning provided by the present invention;

[0062] Figure 2 This is a schematic diagram of a vortex-type inner cone coaxial nozzle for a low-interference multi-nozzle spinning module for electrostatic air-jet spinning provided by the present invention.

[0063] Figure 3This is a schematic diagram of the nozzle, anti-interference device, and spinning area of ​​a low-interference multi-nozzle spinning module for electrostatic air jet spinning provided by the present invention.

[0064] The numbers in the diagram indicate: 1-Liquid supply port, 2-Inner insulating flow channel, 3-Neck-type liquid supply tank, 4-Vortex-type inner cone coaxial nozzle, 5-Air supply port, 6-Air supply channel, 7-Anti-interference device, 8-High voltage power supply, 9-Power supply system, 10-High conductivity electrode, 11-Air supply nozzle base, 12-Height adjustment device, 13-Inner cone-shaped flow collector nozzle, 14-Flow obstruction, 15-Metal spinning solution nozzle, 16-Pendulum mounting base, 17-Pendulum telescopic bracket, 18-Universal rotating shaft, 19-Pendulum connecting spring, 20-Electric field deflecting pendulum. Detailed Implementation

[0065] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0066] like Figure 1-3 As shown, a low-interference multi-nozzle spinning module for electrostatic air-jet spinning includes:

[0067] A spinneret includes: a spinneret body; an inner insulating flow channel 2 disposed within the spinneret body along its length, one end of which is connected to a liquid supply port 1 disposed on the side of the spinneret body; a supply air channel 6 disposed within the spinneret body along its length, the supply air channel 6 being located below the inner insulating flow channel 2; a plurality of neck-type liquid supply grooves 3 disposed within the spinneret body, the plurality of neck-type liquid supply grooves 3 being spaced apart between the inner insulating flow channel 2 and the supply air channel 6 along the length of the spinneret body, one end of each neck-type liquid supply groove 3 being connected to the inner insulating flow channel 2 and the other end being connected to the supply air channel 6; and a plurality of air supply ports 5 disposed on the side of the spinneret body along its length, the plurality of air supply ports 5 being connected to the supply air channel 6.

[0068] A coaxial nozzle assembly is disposed below the plate, the coaxial nozzle assembly comprising multiple coaxial nozzles spaced apart along the length of the plate, one end of each coaxial nozzle extending into the plate being connected to the air supply channel 6; and

[0069] An anti-interference device 7 is installed below the plate. The anti-interference device 7 includes two pendulum mounting seats 16 symmetrically arranged on both sides of the coaxial nozzle assembly. One end of each pendulum mounting seat 16 is fixed below the plate, and the other end is provided with an electric field deflection pendulum assembly.

[0070] In some embodiments of the present invention, the liquid supply port is located at the center of the side of the spinneret and is connected to the inner insulating flow channel. After entering the inner insulating flow channel, the spinning liquid flows through the neck-type liquid supply tank set at a fixed distance below, and supplies liquid to the metal spinning liquid nozzle of the vortex-type inner cone coaxial nozzle connected below the liquid supply tank.

[0071] In some embodiments of the present invention, the lower part of the neck-type liquid supply tank is connected to the air supply channel, and the metal spinning liquid nozzle is connected to the lower part of the neck-type liquid supply tank and sealed at the point of communication with the air supply channel to prevent airflow from flowing back into the liquid supply pipe.

[0072] In some embodiments of the present invention, the air supply ports are arranged in a fixed-distance array on the front of the spinneret and connected to the air supply channel. The air supply nozzle base connected below the air supply channel supplies air to the vortex-type inner cone coaxial nozzle.

[0073] In some embodiments of the present invention, the spinneret further includes a high-voltage power supply 8, a power supply system 9, and a plurality of highly conductive electrodes 10; the plurality of highly conductive electrodes 10 are disposed within the spinneret body and above the inner insulating flow channel 2; the number of the plurality of highly conductive electrodes 10 is consistent with the number of the neck-type liquid supply tanks 3, and each highly conductive electrode 10 is positioned opposite to the corresponding neck-type liquid supply tank 3, so that the spinning solution extruded from the coaxial nozzle is charged; each highly conductive electrode 10 is electrically connected to the high-voltage power supply 8 through the power supply system 9. In the present invention, the high-voltage power supply is located above the spinneret and connected to the power supply system, the power supply system is connected to the highly conductive electrodes, and the highly conductive electrodes are fixed above the inner insulating flow channel and opposite to the neck-type liquid supply tank, so that the charged spinning solution is ejected from the metal spinning solution nozzle.

[0074] spinneret :

[0075] In this invention, the length of the spinneret 1 ranges from 600 to 3000 mm.

[0076] In this invention, multiple coaxial nozzles are arranged in parallel below the spinneret, and the distance between the centers of two connected coaxial nozzles is 20-50 mm.

[0077] In this invention, the number of coaxial nozzles on the spinneret 1 is 30 to 120.

[0078] In this invention, the number of neck-type liquid supply tanks 3 and the number of coaxial nozzles are the same and their positions are arranged accordingly.

[0079] In this invention, the connection between the inner insulating flow channel 2 and the neck-type liquid supply tank 3 is a right-angle arc.

[0080] In this invention, the neck-type liquid supply tank has a conical structure, and the diameter of the end connected to the inner insulating flow channel 2 is larger than the diameter of the end connected to the supply flow channel 6.

[0081] In this invention, the infusion rate of the liquid supply port 1 ranges from 300 to 9600 mL / h.

[0082] In this invention, the liquid supply rate of each coaxial nozzle is 10-80 mL / h.

[0083] In this invention, the voltage range applied by the high-voltage power supply 8 is 0 to 150 kV.

[0084] In this invention, the airflow velocity applied by the air supply port 5 is in the range of 0 to 25 m / s.

[0085] In this invention, the inner wall of the inner insulating channel 2 is coated with an insulating coating, and the coating material is one or more of polystyrene, polytetrafluoroethylene, phenolic resin, siloxane, aluminum silicate, or aluminum oxide.

[0086] In this invention, the high conductivity electrode 10 is made of an alloy composed of one or more of copper, iron, cobalt, nickel, silver or aluminum, preferably a copper-silver alloy or a copper-aluminum alloy.

[0087] In this invention, the plate is made of a high-strength, high-temperature resistant, and solvent-resistant material, including one or more of silicon dioxide, aluminum oxide, zirconium oxide, titanium dioxide, mullite, polyetheretherketone, polytetrafluoroethylene, polyamide, or liquid crystal polymer.

[0088] In some embodiments of the present invention, the coaxial nozzle is a vortex-type inner cone coaxial nozzle 4, comprising: a metal spinning solution nozzle 15 disposed on the lower end face of the plate, the metal spinning solution nozzle 15 being connected to the neck-type liquid supply groove 3; an air supply nozzle base 11 sleeved on the metal spinning solution nozzle 15, the air supply nozzle base 11 being embedded in the plate and connected to the air supply channel 6; and an inner cone-shaped flow collector nozzle 13 mounted on the mounting surface of the air supply nozzle base 11, the inner cone-shaped flow collector nozzle 13 being sleeved on the metal spinning solution nozzle 15. On the spinning solution nozzle 15, the inner conical collector nozzle 13 has a choke fluid 14 arranged radially at its cone tip. When the airflow passes through the choke fluid, a Karman vortex effect is generated. The airflow divided into two sides by the choke fluid generates an unstable vortex, thereby enhancing the whipping of the jet. In other words, when the airflow is ejected from the inner conical collector nozzle through the choke fluid, a high-speed vortex can be formed at the nozzle, which can greatly increase the speed of the airflow at the nozzle and dissipate it quickly in a very short distance, so that the airflow does not affect the whipping and stretching of the jet in the electrostatic field.

[0089] In some embodiments of the present invention, the cross-section of the fluid-blocking fluid 14 is one of a square, rectangular, triangular or irregular cross-section; the equivalent diameter of the fluid-blocking fluid cross-section is 1 to 5 mm.

[0090] In some embodiments of the present invention, a nozzle height adjustment device 12 is also provided between the air supply nozzle base 11 and the inner conical flow collector nozzle 13.

[0091] In some embodiments of the present invention, the nozzle height adjustment device 12 includes a first set of connecting pipes and a second set of connecting pipes connected by threads. The first set of connecting pipes is connected to the air supply nozzle base 11, and the second set of connecting pipes is connected to the inner conical flow collector nozzle 13. The inner conical flow collector nozzle 13 is raised or lowered relative to the air supply nozzle base 11 by rotating the threads clockwise or counterclockwise.

[0092] coaxial nozzle :

[0093] In this invention, the inner conical flow collector nozzle 13 is conical, and the semi-cone angle is at least 33°.

[0094] In this invention, the inner diameter of the metal spinning solution nozzle 15 is 0.2 to 3 mm.

[0095] In this invention, the top end of the metal spinning solution nozzle 15 protrudes 0.1 to 15 mm beyond the outer wall of the inner conical collector nozzle 13.

[0096] In this invention, the air supply nozzle base 11, the height adjustment device 12, and the inner conical collector nozzle 13 are made of one or more of the following materials: silicon dioxide, aluminum oxide, zirconium oxide, titanium oxide, mullite, silicate materials, rubber, polyetheretherketone, polytetrafluoroethylene, polyamide, or liquid crystal polymer.

[0097] In this invention, the metal spinning solution nozzle 15 is made of an alloy composed of one or more of copper, iron, cobalt, nickel, silver, or aluminum, preferably a copper-silver alloy or a copper-aluminum alloy.

[0098] In this invention, the pendulum telescopic bracket 17 is made of one or more of polyurethane, polyimide, polyethylene, polystyrene, epoxy resin or phenolic resin.

[0099] In this invention, the electric field deflection pendulum 20 is made of one or more of the following materials: stainless steel, aluminum, aluminum alloy, tungsten, tungsten alloy, nickel, nickel alloy, copper, or copper alloy.

[0100] In some embodiments of the present invention, the electric field deflection pendulum assembly includes a pendulum telescopic bracket 17, a universal joint 18, a pendulum connecting spring 19, and an electric field deflection pendulum 20. One end of the pendulum telescopic bracket 17 is connected to the pendulum mounting base 16, and the other end is equipped with the universal joint 18. One end of the electric field deflection pendulum 20 is connected to the universal joint 18, and the other end is connected to the electric field deflection pendulum 20. The electric field deflection pendulum 20 will be polarized under an electric field, thereby affecting the magnitude and direction of the electric field. By controlling the position of the electric field deflection pendulum, the deflection electric field is corrected, so that the jet ejection attitude is stable and does not deflect to the sides of the spinneret.

[0101] Electric field deflection pendulum assembly :

[0102] In this invention, the pendulum mounting base 16 is detachably connected to the plate body.

[0103] In this invention, the electric field deflection pendulum 20 is a hollow metal sphere.

[0104] In this invention, the swing angle of the electric field deflection pendulum 20 is 0 to 360°.

[0105] In this invention, the pendulum connecting spring 19 is made of an insulating material with adjustable length.

[0106] In this invention, the extension length of the pendulum connecting spring 19 is 5 to 20 mm.

[0107] The low-interference multi-nozzle spinning module for electrostatic air-jet spinning described above uses a spinning solution that is a solution in which a polymer is dissolved in a corresponding good solvent, or an inorganic sol. The polymer is polyvinyl chloride, polyethylene terephthalate, polyethylene oxide, polycaprolactone, poly(p-phenylene terephthalamide), polyarylamide, polystyrene-polypropylene, polyetherimide, polyvinylidene fluoride, polyamide, polyethylene, polyglyoxal, polybenzimidazole, poly(m-phenylene terephthalamide), polyimide, polyhydroxybutyrate, or polycarbonate. The inorganic sol is one or a combination of several of the following: poly(p-phenylene acetylene), polyvinylidene fluoride, polypyrrolidone, polymethyl methacrylate, polyacrylonitrile, polyurethane, polyacrylic acid, phenolic resin, polyvinyl butyral, polylactic acid, polybutylene succinate, polyethylene glycol, polylactic-caprolactone, polybenzoxazine, polytrihydroxybutyrate, polyaniline, polyacrylamide, polyvinylidene fluoride, polyether ether ketone, polypropylene terephthalate, polyvinyl acetate, polyvinyl alcohol, and polyethylene oxide; and the inorganic sol is silicon-based, aluminum-based, zirconium-based, titanium-based, or a mixture thereof.

[0108] Example 1

[0109] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0110] Step 1: Select a spinneret with a length of 600mm, inject polyurethane spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 300mL / h. Set 30 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly delivered to the metal spinning solution nozzle 15 through the neck-type supply tanks 3. The distance between the centers of each nozzle is 20mm, and the inner diameter of the metal spinning solution nozzle is 0.2mm. At this time, the solution flow rate at a single spinning solution nozzle is 10mL / h.

[0111] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 40kV is supplied to the high conductivity electrode 10, the airflow velocity at the air supply port 5 is set to 0m / s, the height of the height adjustment device 12 is adjusted to 20mm, the obstruction fluid 14 is a cylinder with a diameter of 1mm, and the spinning jet is stretched and refined under the action of the electrostatic field.

[0112] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 180° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 5mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 389nm.

[0113] Example 2

[0114] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0115] Step 1: Select a spinneret with a length of 1700mm, inject polyvinyl alcohol spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 1700mL / h. Set 68 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly delivered to the metal spinning solution nozzle 15 through the neck-type supply tanks 3. The distance between the centers of each nozzle is 25mm. The inner diameter of the metal spinning solution nozzle 15 is 0.8mm. At this time, the solution flow rate at a single spinning solution nozzle is 25mL / h.

[0116] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 60kV is supplied to the high conductivity electrode, the airflow velocity at the air supply port 5 is set to 10m / s, the height of the height adjustment device 12 is adjusted to 5mm, the obstruction fluid 14 is a cylinder with a diameter of 1mm, and the spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0117] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 150° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 10mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 480nm.

[0118] Example 3

[0119] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0120] Step 1: Select a spinneret with a length of 1700mm, inject the polyamide spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 2520mL / h. Set 42 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly delivered to the metal spinning solution nozzle 15 through the neck-type supply tanks 3. The distance between the centers of each nozzle is 40mm. The inner diameter of the metal spinning solution nozzle 15 is 2mm. At this time, the solution flow rate at a single spinning solution nozzle is 60mL / h.

[0121] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 120kV is supplied to the high conductivity electrode 10, the airflow velocity at the air supply port is set to 15m / s, the height of the height adjustment device 12 is adjusted to 10mm, the obstruction fluid 14 is a cylinder with a diameter of 3mm, and the spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0122] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 90° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 15mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 325nm.

[0123] Example 4

[0124] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0125] Step 1: Select a spinneret with a length of 1700mm, inject the polyvinylidene fluoride spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 680mL / h. Set 34 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly transported to the metal spinning solution nozzle 15 through the supply tank. The distance between the centers of each nozzle is 50mm. The inner diameter of the metal spinning solution nozzle 15 is 3mm. At this time, the solution flow rate at a single spinning solution nozzle is 20mL / h.

[0126] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 150kV is supplied to the high conductivity electrode, the airflow velocity at the air supply port is set to 15m / s, the height of the height adjustment device is adjusted to 10mm, the obstruction fluid is a cylinder with a diameter of 3mm, and the spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0127] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 90° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 15mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 82nm.

[0128] Example 5

[0129] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0130] Step 1: Select a spinneret with a length of 2200mm, and inject the mullite precursor sol spinning solution into the supply port 1 at a certain injection pressure. The injection speed is set to 6160mL / h. Set 88 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly transported to the metal spinning solution nozzle 15 through the supply tank. The distance between the centers of each nozzle is 25mm. The inner diameter of the metal spinning solution nozzle 15 is 2mm. At this time, the solution flow rate at a single spinning solution nozzle is 70mL / h.

[0131] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, supply 80kV DC spinning voltage to the high conductivity electrode, set the airflow velocity at the air supply port to 15m / s, adjust the height of the height adjustment device to 10mm, and use a cylinder with a diameter of 3mm for the flow obstruction. The spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0132] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 150° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 10mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 254nm.

[0133] Example 6

[0134] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0135] Step 1: Select a spinneret with a length of 2200mm, inject the zirconia precursor sol spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 2200mL / h. Set 55 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly transported to the metal spinning solution nozzle 15 through the supply tank. The distance between the centers of each nozzle is 40mm. The inner diameter of the metal spinning solution nozzle 15 is 1.5mm. At this time, the solution flow rate at a single spinning solution nozzle is 40mL / h.

[0136] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 120kV is supplied to the high conductivity electrode, the airflow velocity at the air supply port is set to 20m / s, the height of the height adjustment device is adjusted to 15mm, and the obstruction fluid is a cylinder with a diameter of 6mm. The spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0137] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 120° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 15mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 197nm.

[0138] Example 7

[0139] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0140] Step 1: Select a spinneret with a length of 2200mm, inject the alumina precursor sol spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 3520mL / h. Set 44 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly transported to the metal spinning solution nozzle 15 through the supply tank. The distance between the centers of each nozzle is 50mm. The inner diameter of the metal spinning solution nozzle 15 is 3mm. At this time, the solution flow rate at a single spinning solution nozzle is 80mL / h.

[0141] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 150kV is supplied to the high conductivity electrode, the airflow velocity at the air supply port is set to 25m / s, the height of the height adjustment device is adjusted to 20mm, and the obstruction fluid is a cylinder with a diameter of 10mm. The spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0142] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 90° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 20mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 275nm.

[0143] Example 8

[0144] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0145] Step 1: Select a spinneret with a length of 3000mm, inject polysulfone spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 3000mL / h. Set 50 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly transported to the metal spinning solution nozzle 15 through the supply tank. The distance between the centers of each nozzle is 60mm. The inner diameter of the metal spinning solution nozzle 15 is 2mm. At this time, the solution flow rate at a single spinning solution nozzle is 60mL / h.

[0146] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 100kV is supplied to the high conductivity electrode, the airflow velocity at the air supply port is set to 10m / s, the height of the height adjustment device is adjusted to 5mm, and the obstruction fluid is a cylinder with a diameter of 3mm. The spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0147] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 150° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 10mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 425nm.

[0148] Example 9

[0149] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0150] Step 1: Select a spinneret with a length of 3000mm, and inject the poly(p-phenylene terephthalamide) spinning solution into the supply port 1 at a certain injection pressure. The injection speed is set to 4500mL / h. Set 75 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly transported to the metal spinning solution nozzle 15 through the supply tank. The distance between the centers of each nozzle is 40mm. The inner diameter of the metal spinning solution nozzle 15 is 2mm. At this time, the solution flow rate at a single spinning solution nozzle is 60mL / h.

[0151] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, supply 0kV DC spinning voltage to the high conductivity electrode, set the airflow velocity at the air supply port to 25m / s, adjust the height of the height adjustment device to 20mm, use a cylinder with a diameter of 10mm for the flow obstruction, and stretch and refine the spinning jet under the synergistic effect of the electrostatic field and the airflow field.

[0152] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 180° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 5mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 503nm.

[0153] Example 10

[0154] Ultrafine fiber materials were prepared using a low-interference multi-nozzle spinning module for electrostatic air-jet spinning as described above. The preparation steps are as follows:

[0155] Step 1: Select a spinneret with a length of 3000mm, inject polylactic acid spinning solution into the supply port 1 at a certain injection pressure, and set the injection speed to 9600mL / h. Set 120 neck-type supply tanks 3 in the insulated supply pipeline. The spinning solution is evenly transported to the metal spinning solution nozzle 15 through the supply tank. The distance between the centers of each nozzle is 25mm. The inner diameter of the metal spinning solution nozzle 15 is 3mm. At this time, the solution flow rate at a single spinning solution nozzle is 80mL / h.

[0156] Step 2: When the solution flow rate at the spinning nozzle is stable and the spinneret temperature reaches the set value, a DC spinning voltage of 60kV is supplied to the high conductivity electrode, the airflow velocity at the air supply port is set to 25m / s, the height of the height adjustment device is adjusted to 20mm, and the obstruction fluid is a cylinder with a diameter of 10mm. The spinning jet is stretched and refined under the synergistic effect of the electrostatic field and the airflow field.

[0157] Step 3: Based on the offset state of the spinning jet at the edge, the angle of the electric field deflection pendulum 20 is set to 120° with the pendulum telescopic support 17, and the length of the pendulum telescopic spring 19 is 10mm. Under the action of the polarized electric field of the electric field deflection pendulum 20, the jet flies perpendicular to the spinneret direction and is finally deposited on the receiving substrate. The average diameter of the final ultrafine fiber material is 342nm.

[0158] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A low-interference multi-nozzle spinning module for electrostatic air-jet spinning, characterized in that, include: Spinneret, including: the sheet body; An inner insulating flow channel (2) is provided in the plate body along the length direction of the plate body, and one end of the inner insulating flow channel (2) is connected to the liquid supply port (1) provided on the side of the plate body; An air supply channel (6) is provided in the plate body along the length direction of the plate body, and the air supply channel (6) is located below the inner insulating channel (2); Multiple neck-type liquid supply grooves (3) are disposed within the plate body, and the multiple neck-type liquid supply grooves (3) are spaced apart along the length of the plate body between the inner insulating flow channel (2) and the supply flow channel (6). One end of each neck-type liquid supply groove (3) is connected to the inner insulating flow channel (2), and the other end is connected to the supply flow channel (6); and Multiple air supply ports (5) are provided on the side of the plate along the length of the plate, and the multiple air supply ports (5) are connected to the air supply channel (6); A coaxial nozzle assembly is disposed below the plate, the coaxial nozzle assembly comprising multiple coaxial nozzles spaced apart along the length of the plate, one end of each coaxial nozzle extending into the plate being connected to the air supply channel (6); and An anti-interference device (7) is set below the plate. The anti-interference device (7) includes two pendulum mounting seats (16) symmetrically arranged on both sides of the coaxial nozzle assembly. One end of each pendulum mounting seat (16) is fixed below the plate, and the other end is provided with an electric field deflection pendulum assembly. The electric field deflection pendulum assembly includes a pendulum telescopic bracket (17), a universal joint (18), a pendulum connecting spring (19), and an electric field deflection pendulum (20); one end of the pendulum telescopic bracket (17) is connected to the pendulum mounting base (16), and the other end is equipped with the universal joint (18); one end of the electric field deflection pendulum (20) is connected to the universal joint (18), and the other end is connected to the electric field deflection pendulum (20); The electric field deflection pendulum (20) will be polarized under the electric field. The material of the electric field deflection pendulum (20) is one or more of stainless steel, aluminum, aluminum alloy, tungsten, tungsten alloy, nickel, nickel alloy, copper or copper alloy. The spinneret also includes a high-voltage power supply (8), a power supply system (9), and multiple highly conductive electrodes (10). Multiple highly conductive electrodes (10) are disposed within the plate and above the inner insulating flow channel (2); The number of the multiple high conductivity electrodes (10) is the same as the number of the neck-type liquid supply tanks (3), and each high conductivity electrode (10) is positioned opposite to the corresponding neck-type liquid supply tank (3); Each of the highly conductive electrodes (10) is electrically connected to the high-voltage power supply (8) via the power supply system (9).

2. The low-interference multi-nozzle spinning module for electrostatic air-jet spinning according to claim 1, characterized in that, The spinneret satisfies at least one of the following conditions: The length of the spinneret ranges from 600 to 3000 mm; Multiple coaxial nozzles are arranged in parallel below the spinneret, and the distance between the centers of two connected coaxial nozzles is 20~50mm. The spinneret has 30 to 120 coaxial nozzles. The number of neck-type liquid supply tanks (3) is the same as the number of coaxial nozzles and their positions are arranged accordingly; The connection between the inner insulating flow channel (2) and the neck-type liquid supply tank (3) is a right-angle arc; The neck-type liquid supply tank has a conical structure, and the diameter of the end connected to the inner insulating flow channel (2) is larger than the diameter of the end connected to the supply flow channel (6). The infusion rate of the liquid supply port (1) is 300~9600mL / h; The liquid supply rate of each coaxial nozzle is 10~80mL / h; The voltage range applied by the high-voltage power supply (8) is 0~150kV; The airflow velocity applied by the air supply port (5) is in the range of 0~25m / s; The inner wall of the inner insulating flow channel (2) is coated with an insulating coating material, which is one or more of polystyrene, polytetrafluoroethylene, phenolic resin, siloxane, aluminum silicate or aluminum oxide. The high conductivity electrode (10) is made of an alloy of one or more of copper, iron, cobalt, nickel, silver or aluminum. The plate is made of a high-strength, high-temperature resistant, and solvent-resistant material, including one or more of silicon dioxide, aluminum oxide, zirconium oxide, titanium oxide, mullite, polyetheretherketone, polytetrafluoroethylene, polyamide, or liquid crystal polymer.

3. The low-interference multi-nozzle spinning module for electrostatic air-jet spinning according to claim 1, characterized in that, The coaxial nozzle is a vortex-type inner cone coaxial nozzle (4), comprising: The metal spinning solution nozzle (15) is located on the lower end face of the plate and is connected to the neck-type liquid supply tank (3). An air supply nozzle base (11) is fitted onto the metal spinning solution nozzle (15). The air supply nozzle base (11) is embedded in the plate body and connected to the air supply channel (6). An inner conical collector nozzle (13) is installed on the mounting surface of the air supply nozzle base (11). The inner conical collector nozzle (13) is fitted onto the metal spinning liquid nozzle (15). The cone tip of the inner conical collector nozzle (13) is provided with a flow-blocking fluid (14) along its radial direction.

4. A low-interference multi-nozzle spinning module for electrostatic air-jet spinning according to claim 3, characterized in that, The cross-section of the fluid barrier (14) is one of a square, rectangular, triangular or irregular cross-section; the equivalent diameter of the fluid barrier cross-section is 1~5mm.

5. A low-interference multi-nozzle spinning module for electrostatic air-jet spinning according to claim 3, characterized in that, A nozzle height adjustment device (12) is also provided between the air supply nozzle base (11) and the inner cone-shaped collector nozzle (13).

6. A low-interference multi-nozzle spinning module for electrostatic air-jet spinning according to claim 5, characterized in that, The nozzle height adjustment device (12) includes a first set of connecting pipes and a second set of connecting pipes connected by threads. The first set of connecting pipes is connected to the air supply nozzle base (11), and the second set of connecting pipes is connected to the inner cone-shaped flow collector nozzle (13). The inner cone-shaped flow collector nozzle (13) can be raised or lowered relative to the air supply nozzle base (11) by rotating the threads clockwise or counterclockwise.

7. A low-interference multi-nozzle spinning module for electrostatic air-jet spinning according to claim 3, characterized in that, The coaxial nozzle satisfies at least one of the following conditions: ①The inner conical flow collector (13) is conical, with a half-cone angle of at least 33°; ②The inner diameter of the metal spinning solution nozzle (15) is 0.2~3mm; ③The top of the metal spinning solution nozzle (15) protrudes 0.1~15mm beyond the outer wall of the inner conical collector nozzle (13); ④ The air supply nozzle base (11), height adjustment device (12) and inner cone-shaped flow collector nozzle (13) are made of one or more of the following materials: silicon dioxide, aluminum oxide, zirconium oxide, titanium oxide, mullite, silicate materials, rubber, polyether ether ketone, polytetrafluoroethylene, polyamide or liquid crystal polymer. ⑤ The metal spinning solution nozzle (15) is made of an alloy composed of one or more of copper, iron, cobalt, nickel, silver or aluminum; ⑥ The material of the pendulum telescopic bracket (17) is one or more of polyurethane, polyimide, polyethylene, polystyrene, epoxy resin or phenolic resin.

8. A low-interference multi-nozzle spinning module for electrostatic air-jet spinning according to claim 1, characterized in that, The electric field deflection pendulum assembly satisfies at least one of the following conditions: ①The pendulum mounting base (16) is detachably connected to the plate body; ②The electric field deflection pendulum (20) is a hollow metal sphere; ③ The swing angle of the electric field deflection pendulum (20) is 0~360°; ④ The pendulum connecting spring (19) is made of an adjustable-length insulating material; ⑤ The extension length of the pendulum connecting spring (19) is 5~20mm.

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