Solution type nanofiber spinning equipment

Abstract

The invention discloses solution type nanofiber spinning equipment, and relates to the technical field of nanofiber spinning, the solution type nanofiber spinning equipment is characterized in that a first through hole which is horizontally through and a second through hole which is obliquely through are formed in the side wall of a box body, and the second through hole is flush with the first through hole; the air supply assembly is provided with an output end and communicates with the second through hole to guide airflow in. The spinning module comprises a spinning die head and a high-voltage electrostatic ring, the high-voltage electrostatic ring is located below the spinning die head to form a high-voltage electrostatic field, a spinneret orifice is formed in the spinning die head and is a double-layer skin core hole, a spinning solution is guided into the inner layer of the spinneret orifice, and pressurized airflow is guided into the outer layer of the spinneret orifice; the spinning solution flows out through the spinning die head and is drafted under the action of the pressurized airflow, meanwhile, spiral disordered air is formed in the box body, and the spiral disordered air is overlapped with the pressurized airflow and the action of the high-voltage electrostatic field to regulate and control the fiber form. The method has the advantage that various fibers with special-shaped structures can be prepared in a macro-scale manner by regulating and controlling the morphology of the nanofibers.

Description

Technical Field

[0001] The present invention relates to the technical field of nanofiber spinning, and particularly relates to a solution-type nanofiber spinning device. Background Art

[0002] Nanofibers refer to fibers with a macroscopic fiber diameter < 1 μm, which have advantages such as a large specific surface area, a high aspect ratio and pore volume, excellent pore interconnectivity, and mechanical properties, and are widely used in the fields of biomedical materials, fuel cells, filtration, and biosensors. Currently, the methods that can effectively produce nanofibers are mainly prepared by solution-type fiber forming technologies, including electrospinning, centrifugal spinning technology, solution jet spinning, etc.

[0003] Solution jet spinning technology has advantages such as high spinning efficiency and low energy consumption, and has received extensive attention. Currently, solution-type nanofiber spinning devices usually spin by spraying a solution from the spinning nozzles on the spinning die head, and can achieve the large-scale preparation of nano- and micro-scale fibers. The fineness of the prepared fibers can be in the range of (0.01 - 3 μm). Although in some specially designed spinning nozzles, gas channels are used to disperse, stabilize, and uniformly transport compressed gas to the spinneret orifice to assist in the formation of fibers, most of the current solution-type nanofiber spinning devices are only a kind of fiber forming, and can only be used to prepare conventional nano-scale fibers, and cannot prepare various and special-shaped structure fibers, such as three-dimensional crimped nanofibers, highly oriented nanofibers, etc. Some devices can achieve the preparation of special-shaped structure fibers, but they integrate multiple series of processing equipment, with a high cost, and cannot achieve the large-scale preparation of various and special-shaped structure fibers, which greatly limits the application of special-shaped nanofibers in the fields of special filtration, high-efficiency adsorption, strain sensing, etc.

[0004] In summary, there is a need for a solution-type nanofiber spinning device that can regulate the morphology of nanofibers and achieve the large-scale preparation of various and special-shaped structure fibers. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a solution-type nanofiber spinning device that can regulate the morphology of nanofibers and achieve the large-scale preparation of various and special-shaped structure fibers.

[0006] The present invention provides a solution-type nanofiber spinning device, including: A box body, on the side wall of which there are provided a first through hole horizontally penetrating the box body and a second through hole obliquely penetrating the box body, and the second through hole is flush with the first through hole; An air supply assembly, having an output end, and the air supply assembly is communicated with the second through hole for introducing air flow into the box body; The spinning module includes a spinning die head and a high-voltage static ring. Both the spinning die head and the high-voltage static ring are arranged inside the box body. The high-voltage static ring is located directly below the spinning die head. The high-voltage static ring is used to form a high-voltage electrostatic field below the spinning die head. The spinning die head is provided with spinneret holes, and the spinneret holes are double-layer skin-core holes. The inner layer of the spinneret hole is used to introduce the spinning solution, and the outer layer of the spinneret hole is used to introduce pressurized air flow; The spinning solution flows out through the spinning die head and is drawn into fibers under the action of the pressurized air flow. At the same time, the air flow forms a spiral turbulent wind inside the box body after passing through the first through hole. The spiral turbulent wind, combined with the action of the pressurized air flow and the high-voltage electrostatic field, forms the regulation of the fiber morphology.

[0007] Preferably, the outer layer of the spinneret hole introduces pressurized air flow through an air flow component. The air flow component includes: An air compressor; An air storage tank, the output end of the air compressor is communicated with the input end of the air storage tank; A dehumidifier, the output end of the air storage tank is communicated with the input end of the dehumidifier; A second heating chamber, having an input end and an output end. Heating wires are provided on the inner wall of the second heating chamber. The output end of the dehumidifier is communicated with the input end of the second heating chamber. The output end of the second heating chamber is communicated with the outer layer of the spinneret hole through the connecting pipe.

[0008] Preferably, the top and bottom of the box body are open. A hot air component is provided at the top of the box body. The hot air component is used to provide a high-temperature hot air source for the box body. A receiving component is provided at the bottom of the box body. The receiving component is used to receive fibers.

[0009] Preferably, the hot air component includes: A first heating chamber, arranged at the top of the box body. The first heating chamber is conical. The top end of the first heating chamber is the air inlet, and the bottom end of the first heating chamber is the air outlet. The air outlet is communicated with the box body. The diameter of the air inlet is smaller than the diameter of the air outlet; Multiple heating tubes, uniformly arranged on the inner wall of the first heating chamber; A fan, arranged at the air inlet. The fan is used to introduce air from the air inlet to the air outlet.

[0010] Preferably, it further includes: Multiple temperature sensors, respectively arranged inside the first heating chamber, inside the box body, and inside the second heating chamber.

[0011] Preferably, the receiving component includes: Two rotating shafts are horizontally arranged on the side walls of the box body respectively, and both ends of each rotating shaft are rotatably connected to the side walls of the box body; A motor has an output end, and the output end of the motor is connected to one of the rotating shafts; A mesh curtain is annular and is sleeved on the circumferences of the two rotating shafts; A blower is arranged below the box body. The blower is located at the bottom of the mesh curtain. The blower and the hot air assembly jointly deposit fibers on the mesh curtain.

[0012] Preferably, the included angle between the second through hole and the horizontal plane is -30° to 30°, and the included angle between the second through hole and the vertical plane is 30° to 80°.

[0013] Preferably, multiple sets of spinning modules are provided, and further include: Two guide rails are horizontally erected in the box body respectively. One of the guide rails is arranged along the length direction of the box body, and the other guide rail is arranged along the width direction of the box body. The spinning die heads and high-voltage electrostatic rings in multiple sets of spinning modules are respectively slidably connected to the bottoms of the two guide rails through sliding rods. The sliding rods between the spinning die heads and the high-voltage electrostatic rings in each set of spinning modules are connected through connecting rods.

[0014] Preferably, the spinning die head is made of polyether ether ketone.

[0015] Compared with the prior art, the present invention discloses a solution-type nanofiber spinning device, and its beneficial effects are: This device can regulate the macro-quantitative preparation of nanofibers with various and special-shaped structures. By setting a high-voltage electrostatic ring to form a high-voltage electrostatic field, fibers are formed under the action of a pressurized air flow. The fibers will carry a large amount of charges under the action of the high-voltage electrostatic field. At the same time, by setting the second through hole and the air supply assembly, spiral turbulent air can be provided for the box body, so that the fiber jets will be helically wound during the forming process to form highly curled nanofibers. The parameter combinations for regulating the nanofiber morphology under the combined action of high-voltage static electricity, stretching air flow, spiral turbulent air flow, etc. increase, and the types of fiber structures that can be regulated are more. It can not only prepare highly oriented nanofibers by combining electrostatic forces, but also prepare highly curled nanofibers, and can also prepare combined fiber morphologies between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a side view of the present invention.

[0018] The meanings of each label in the figure: 1 - box body, 2 - spinning module, 3 - air flow component, 4 - hot air component, 5 - guide rail, 6 - spinning solution preparation device, 7 - filtration and recovery component, 8 - receiving component, 21 - spinning die head, 22 - high-voltage electrostatic ring, 23 - second through hole, 31 - air compressor, 32 - gas storage tank, 33 - dehumidifier, 34 - second heating chamber, 35 - connecting pipe, 36 - temperature sensor, 41 - first heating chamber, 42 - heating pipe, 43 - fan, 61 - fixed box, 62 - solution preparation tank, 63 - stirring structure, 64 - infusion pipe, 65 - control valve, 71 - air suction and exhaust device, 72 - condensation device, 73 - filtration device, 74 - recovery box, 81 - motor, 82 - wire mesh curtain, 83 - second fan. Specific embodiments

[0019] Next, in conjunction with the accompanying drawings, a specific embodiment of the present invention will be described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0022] In addition, in the description of the present invention, "a plurality of" means two or more than two. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0023] Example 1 An embodiment of the present invention provides a solution-type nanofiber spinning device such as Figure 1As shown in the figure, it includes: a box body 1, a spinning module 2, a solution preparation tank 62, and an air flow component 3. The box body 1 is a spinning chamber. There are two through holes opened on the side wall of the box body 1, namely a first through hole and a second through hole 23. The box body 1 has a certain thickness. The first through hole horizontally penetrates the box body 1. The first through hole is an air outlet hole. The second through hole 23 obliquely penetrates the box body 1. The second through hole 23 is an air inlet hole. There is an air supply component on the side wall of the box body 1. The output end of the air supply component is communicated with the second through hole 23 that obliquely penetrates the box body 1. The air supply component supplies air into the box body 1 through the second through hole 23. The air supply component is a first fan. Through the inclined second through hole 23, the air blown into the box body 1 circulates around the inner wall of the box body 1 and is discharged from the horizontal first through hole. The two through holes and the air supply component provide spiral turbulent air for the box body 1 to regulate the spinning direction. The two second through holes 23 are flush. There is a transparent observation window opened on the side wall of the box body 1. The observation window is made of plastic steel, with high strength and good transparency, which is convenient for observing the spinning situation; The spinning module 2 includes a spinning die head 21 and a high-voltage static ring 22. The spinning die head 21 is arranged in the box body 1. The spinning die head 21 is used for spinning. The spinning die head 21 is a needleless spinning die head. The die head can be freely disassembled and assembled, and its material is high-strength and solvent-resistant PEEK, which can avoid the influence of high-voltage static electricity on spinning. There are spinneret holes opened on the spinning die head 21. The spinneret holes are double-layer skin-core holes, that is, the spinneret holes are double-layer holes. The positions of the two second through holes 23 can be higher or lower than the spinneret holes, but not too low, generally not lower than half of the position from the spinneret holes to the bottom end of the box body 1. The high-voltage static ring 22 is arranged in the box body 1, and the high-voltage static ring 22 is located directly below the spinning die head 21. The high-voltage static ring 22 is used to provide an electrostatic field for the spinning die head 21, and the switch and voltage magnitude can be manually adjusted according to the spinning requirements. Because the voltage level has a significant impact on the fiber structure, usually the greater the voltage, the easier the fiber is to be stretched, and the fiber diameter shows a finer state. At the same time, due to the difference in the surface energy of the solution for different polymer spinning, different voltages are also required; The solution preparation tank 62 is arranged on the side wall of the box body 1. The solution preparation tank 62 contains spinning solution. The solution preparation tank 62 is communicated with the inner layer of the spinneret holes through a liquid delivery pipe 64. The spinning solution is ejected from the spinneret holes to form fibers. The liquid outlet position of the spinneret holes and the die head substrate are in the same plane. This spinning die head 21 is a needleless spinneret hole, which can reduce the accumulation of liquid in the spinneret holes during the spinning process and cause blockage, and at the same time avoid the arrangement of the solution during the stretching process and affect the fiber-forming state; The air flow component 3 has a connecting pipe 35. The connecting pipe 35 is communicated with the outer layer of the spinneret holes. The outer layer of the spinneret holes is used to eject pressurized air flow. The ejected air flow can stretch the ejected solution to form fibers.Through the provision of a high-voltage electrostatic ring 22 and an air flow assembly 3, after the spinning air flow passes through the high-voltage electrostatic ring 22, the fiber filaments will carry a large amount of electric charges after filament formation. After carrying the charges, the fibers can be simultaneously affected by working actions such as an electrostatic field and a wind force field. The surface structure of the fibers has stronger plasticity. Under their combined action, the parameter combinations for regulating the morphology of nanofibers increase, and there are more types of fiber structures that can be regulated. At the same time, through two second through holes 23 and the air supply assembly, spiral turbulent air is provided to the box body 1, so that during the forming process of the fiber stream, spiral winding occurs to form highly curled nanofibers. Through the regulation of actions such as high-voltage static electricity, stretching air flow, and spiral turbulent air flow, it is possible to prepare highly oriented nanofibers by combining electrostatic forces, prepare highly curled nanofibers, or prepare a combined fiber morphology between the two.

[0024] Among them, the solution preparation tank 62 belongs to the structure in the spinning solution preparation device 6. The spinning solution preparation device 6 includes: a fixed tank 61, a solution preparation tank 62, a stirring structure 63, a liquid delivery pipe 64, a control valve 65, and a temperature control structure. The fixed tank 61 is arranged on the outer side wall of the box body 1; the solution preparation tank 62 is arranged in the fixed tank 61. A stirring structure 63 is provided in the solution preparation tank 62. The stirring structure 63 is a structure in which a blade driven by a motor rotates and stirs in the prior art. An outlet is provided at the bottom of the solution preparation tank 62, and a control valve 65 is provided on the outlet; the liquid delivery pipe 64 is communicated with the outlet, and the end of the liquid delivery pipe 64 away from the outlet is communicated with the spinning die head 21 in the spinning module. A metering pump 66 is provided on the liquid delivery pipe 64; the temperature control structure is arranged in the solution preparation tank 62 and is used to control the temperature of the solution in the solution preparation tank 62. During use, the stirring structure 63 can dissolve the polymer and stir the solution, and there is a temperature control structure for temperature increase control. The temperature control structure can be a conventional electric heating method (such as an electric heating wire or an electric heating rod, etc.), and the temperature can be increased through an electric heating form to accelerate the dissolution of the solution. The control valve 65 can control the switch for communicating the die head and the liquid delivery pipe 64. The metering pump 66 is a solution delivery and metering device and can accurately measure the solution delivery speed of the spinning die head.

[0025] Furthermore, the spinning die head 21 is made of polyether ether ketone material to avoid the influence of the high-voltage static electricity generated by the high-voltage electrostatic ring 22 on the spinning die head 21, and an electrostatic protection and automatic protection device is placed in the box body 1, realizing safe production during the spinning process.

[0026] In this embodiment, a specific structure of the air flow component 3 is provided. Further, the air flow component 3 includes: an air compressor 31, an air storage tank 32, a dehumidifier 33, and a second heating chamber 34. The output end of the air compressor 31 is communicated with the input end of the air storage tank 32, and the air compressor 31 can compress the gas in the air storage tank 32 to generate high-pressure air flow; the output end of the air storage tank 32 is communicated with the input end of the dehumidifier 33, and the dehumidifier 33 can remove the water vapor in the air to avoid the influence of water vapor on the spinning state. Because the main function of the high-speed air flow drawing part is to refine and stretch the polymer solution, if the water vapor is too high, it will have an adverse effect on fiber forming, resulting in difficult fiber forming and easy blockage of the spinning die head 21; the second heating chamber 34 has an input end and an output end, and heating wires are provided on the inner wall of the second heating chamber 34. The output end of the dehumidifier 33 is communicated with the input end of the second heating chamber 34, and the output end of the second heating chamber 34 is communicated with the outer layer of the spinneret hole through a connecting pipe 35. It is equivalent to opening an inlet and an outlet in the second heating chamber 34 respectively. The dehumidified air enters through the inlet for heating and flows out through the outlet to be ejected at the spinneret hole. The second heating chamber 34 can provide a temperature-raising function for the air flow drawing the fiber, improve the fiber curing rate, reduce fiber adhesion, affect the spinning efficiency, and improve the spinning effect.

[0027] Further, the angle between the second through hole 23 that obliquely penetrates the box body 1 and the horizontal plane is -30° to 30°, and the angle between the second through hole 23 and the vertical plane is 30° to 80°. When the inclination angle of the second through hole 23 is within the above range, a ring-shaped blowing wind can be formed in the box body 1. If it is greater than or less than this angle range, it is easy to cause disorder in the wind direction regulation in the box body 1 and unable to form a cyclone in the box body 1, similar to the state of a tornado, and the fiber cannot form a strict three-dimensional crimp structure.

[0028] Further, it further includes a filtering and recycling component 7 that can filter and recycle the solution in the box body 1. The filtering and recycling component 7 includes an air suction and exhaust device 71, a condensation device 72, a filtering device 73, and a recycling box 74. The air suction and exhaust device 71 includes a motor, a fan blade, an air inlet pipe interface, and an air exhaust pipe interface. The motor and the fan blade form a blower that can suck air, and the air inlet pipe interface is communicated with the box body. The condensation device 72 has a condensation pipe, the condensation pipe is of a double-layer structure, the outer layer of the condensation pipe is filled with circulating cooling water, the condensation pipe is inclined, one end of the inner layer of the condensation pipe is communicated with the air exhaust pipe interface of the air suction and exhaust device 71, the waste gas is unidirectionally sucked from the box body into the inner layer of the condensation pipe, and the end of the condensation pipe communicated with the air suction and exhaust device 71 is lower than the other end. The filtering device 73 is arranged at the end of the condensation pipe facing away from the air suction and exhaust device 71. The filtering device 73 includes activated carbon and a polypropylene fiber core body wrapped in a mesh bag. The activated carbon and the polypropylene fiber core body can ensure that the toxic and harmful organic solvents in the discharged gas are adsorbed. A discharge pipe is connected to the end of the filtering device 73 facing away from the air suction and exhaust device 71, and the gas after the filtering device 73 is discharged through the discharge pipe. The top of the recycling box 74 is provided with a recycling pipe, and the recycling pipe is communicated with the inner layer of the condensation pipe. The condensation pipe is inclined at 60 degrees, and the inside is circulating cooling water. After the high-temperature solvent vapor is transported to the condensation device 72 by the air suction and exhaust device 71, it condenses into a liquid and flows into the recycling box 74 to realize the recycling of organic solvents such as N,N-dimethylformamide and N,N-dimethylacetamide. The excess uncondensed solvent vapor reaches the filtering device 73 for treatment to realize a production and processing process of green zero-solvent discharge. Existing solution spinning equipment mainly uses solvents such as N,N-dimethylformamide and N,N-dimethylacetamide. When the solution jet spinning equipment operates at full load, the spinning speed of the organic solution can reach 200 mL / h. The usage and emission of organic solvents are huge, seriously polluting the environment, and the large consumption of solvents leads to high production costs. Therefore, this device is designed with a condensation recovery and filtering structure, which can effectively recycle and reuse solvents to reduce production costs and reduce solvent emissions, realizing green production.

[0029] Example 2 As a further improvement on the basis of Example 1, further, the top and bottom of the box body 1 are open. The top of the box body 1 is provided with a hot air component 4, and the hot air component 4 is used to provide a high-temperature hot air source for the box body 1. The bottom of the box body 1 is provided with a receiving component 8, and the receiving component 8 is used to receive fibers. On the one hand, the hot air component 4 provides a high-temperature hot air source to the box body 1, which can heat and volatilize the solution remaining on the fibers in the box body 1 without affecting the adjustment of the fiber morphology. On the other hand, the hot air component 4 enters the air from the top of the box body 1, which is more convenient for the fibers to settle on the receiving component 8.

[0030] This embodiment provides a specific structure of the hot air assembly 4. Further, the hot air assembly 4 includes: a first heating chamber 41, a heating pipe 42, and a fan 43. The first heating chamber 41 is disposed at the top of the box body 1. The first heating chamber 41 is conical. The top end of the first heating chamber 41 is the air inlet, and the bottom end of the first heating chamber 41 is the air outlet. The air outlet is communicated with the box body 1. The diameter of the air inlet is smaller than the diameter of the air outlet. A plurality of heating pipes 42 are uniformly arranged on the inner wall of the first heating chamber 41. The fan 43 is disposed at the air inlet, and the fan 43 is used to introduce air from the air inlet to the air outlet. Among them, the first heating chamber 41 is conical and the diameter of the air inlet is smaller than the diameter of the air outlet, so as to form an air negative pressure in the box body 1, which is better conducive to the deposition of fibers on the receiving assembly 8. In addition, because a large amount of organic solvents are emitted during the spinning process, resulting in serious pollution, in this embodiment, the heating pipe 42 is provided, so that the air introduced into the box body 1 is hot air, which can accelerate the volatilization of the organic solvents, realize fiber forming, avoid affecting the adjustment of the fiber morphology, and at the same time avoid the emission of a large amount of organic solvents. Cooperating with the filtration and recovery assembly 7 can further avoid pollution and realize green production.

[0031] Further, it further includes: a plurality of temperature sensors 36 are respectively disposed in the first heating chamber 41, the box body 1, the second heating chamber 34, and the connecting pipe 35, and can monitor the temperature of the air flow in each chamber and the spinneret holes in real time, and monitor and adjust the environmental temperature during the spinning process in real time, so as to realize the effective control of the fiber structure.

[0032] Among them, the other structures of this embodiment are the same as those of Embodiment 1, only the optimization made to Embodiment 1.

[0033] Embodiment 3 As a further improvement based on Embodiment 2, this embodiment provides a specific structure of the receiving component 8. Further, the receiving component 8 includes: a rotating shaft, a motor 81, a mesh curtain 82, and a second blower 83. The two rotating shafts are horizontally arranged on the side walls of the box body 1 respectively, and the two ends of the rotating shafts are rotatably connected to the side walls of the box body 1 respectively. The two rotating shafts are located at both ends of the bottom of the box body 1; the motor 81 has an output end, and the output end of the motor 81 is connected to one of the rotating shafts; the mesh curtain 82 is annular and sleeved on the circumferences of the two rotating shafts. The mesh curtain 82 has a plurality of mesh holes on it, which can realize the deposition of fibers on its surface. The mesh curtain 82 is similar to a conveyor belt. The motor 81 drives the mesh curtain 82 to rotate reciprocally in a cycle. A collecting structure is provided at one end of one of the rotating shafts. During the rotation of the mesh curtain 82, the collecting structure can collect the fibers on the mesh curtain 82. This collecting structure is very common in current nanofiber spinning machines; the second blower 83 is arranged at the bottom end of the box body 1. The suction port of the second blower 83 is communicated with the bottom of the box body. The second blower 83 is located below the mesh curtain 82. The second blower 83 and the hot air component 4 jointly deposit the fibers on the mesh curtain 82. At the same time, the exhaust port of the second blower 83 is communicated with the air inlet pipe interface of the air suction and exhaust device 71, which can form a collaborative cyclic air suction and exhaust system, improve the air suction speed of the gas, increase the negative pressure effect in the box body, further improve the fiber deposition effect and rate. At the same time, the air suction and exhaust device 71 and the second blower 83 can form a vacuum air suction effect on the box body 1. Superimposed on the vacuum downward air suction effect in the box body 1, it can better make the fiber jet form spiral winding during the forming process to form highly curled nanofibers.

[0034] Among them, the other structures of this embodiment are the same as those of Embodiment 2, only an optimization is made to Embodiment 2.

[0035] Embodiment 4 As a further improvement based on Embodiment 1, further, multiple sets of spinning modules 2 are provided, and it further includes: two guide rails 5 are horizontally erected in the box body 1 respectively. One of the guide rails 5 is arranged along the length direction of the box body 1, and the other guide rail 5 is arranged along the width direction of the box body 1. The spinning die heads 21 and the high-voltage static rings 22 in multiple sets of spinning modules 2 are respectively slidably connected to the bottoms of the two guide rails 5 through sliding rods. The sliding rods between the spinning die heads 21 and the high-voltage static rings 22 in each set of spinning modules 2 are connected by connecting rods. By setting the two guide rails 5, the spinning die heads 21 and the high-voltage static rings 22 can be moved synchronously, realizing mobile spinning of the die heads during the spinning process, ensuring uniform deposition of fibers during the spinning process. In addition, linear drive motors or structures such as electric telescopic rods and hydraulic rods are provided on the guide rails 5, which can realize driving the spinning die heads 21 and the high-voltage static rings 22 to move on the guide rails 5.

[0036] There are also multiple infusion tubes 64, which are connected to the liquid outlets respectively, and the ends of the multiple infusion tubes 64 away from the liquid outlets are connected to the spinning die heads 21 in the multiple spinning module groups one by one.

[0037] Among them, other structures of this embodiment are consistent with those of embodiment 1, and are just optimizations made to embodiment 1.

[0038] The advantage of the present invention is that the device can regulate the morphology of nanofibers to prepare multiple and special-shaped structural fibers in a macro-quantity. A high-voltage electrostatic field is formed by setting a high-voltage electrostatic ring, and fibers are formed under the action of pressurized airflow. The fibers carry a large amount of charge under the action of the high-voltage electrostatic field. At the same time, the second through hole and the air supply component can provide spiral turbulent wind for the box body, so that the fiber fine flow can be spirally wound during the forming process to form highly curled nanofibers. The combination of parameters for regulating the morphology of nanofibers under the joint action of high-voltage static electricity, drafting airflow, spiral turbulent airflow, etc. increases, and the fiber can regulate more structural types. High-oriented nanofibers can be prepared in combination with electrostatic forces, high-curling nanofibers can be prepared, and a combined fiber morphology between the two can also be prepared.

[0039] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A solution-type nanofiber spinning device, characterized in that: include: A box body (1), a side wall of which is provided with a first through hole that horizontally penetrates the box body (1) and a second through hole (23) that obliquely penetrates the box body (1), the second through hole (23) being flush with the first through hole; An air supply component having an output end, the air supply component being in communication with the second through hole (23) and being used to introduce air flow into the box body (1); A spinning module (2), comprising a spinning die (21) and a high-voltage electrostatic ring (22), wherein the spinning die (21) and the high-voltage electrostatic ring (22) are both arranged in the box (1), the high-voltage electrostatic ring (22) is located directly below the spinning die (21), and the high-voltage electrostatic ring (22) is used to form a high-voltage electrostatic field below the spinning die (21), and the spinning die (21) is provided with a spinneret hole, wherein the spinneret hole is a double-layer skin-core hole, wherein the inner layer of the spinneret hole is used to introduce a spinning solution, and the outer layer of the spinneret hole is used to introduce a pressurized airflow; The spinning solution flows out through the spinning die (21) and is stretched to form fibers under the action of the pressurized airflow. At the same time, the airflow passes through the first through hole to form a spiral turbulent wind in the box (1). The spiral turbulent wind is superimposed on the pressurized airflow and the high-voltage electrostatic field to regulate the fiber morphology.

2. A solution-based nanofiber spinning device according to claim 1, characterized in that: The outer layer of the spinneret hole is introduced with pressurized airflow through an airflow component (3), and the airflow component (3) comprises: Air compressor (31); An air storage tank (32), wherein the output end of the air compressor (31) is connected to the input end of the air storage tank (32); A dehumidifier (33), wherein the output end of the gas storage tank (32) is connected to the input end of the dehumidifier (33); The second heating chamber (34) has an input end and an output end. A heating wire is provided on the inner wall of the second heating chamber (34). The output end of the dehumidifier (33) is connected to the input end of the second heating chamber (34). The output end of the second heating chamber (34) is connected to the outer layer of the spinneret hole through the connecting pipe (35).

3. A solution-based nanofiber spinning device according to claim 2, characterized in that: The top and bottom of the box body (1) are open; a hot air component (4) is provided on the top of the box body (1); the hot air component (4) is used to provide a high-temperature hot air source for the box body (1); and a receiving component (8) is provided on the bottom of the box body (1); the receiving component (8) is used to receive fibers.

4. A solution-based nanofiber spinning device according to claim 3, characterized in that: The hot air component (4) comprises: A first heating chamber (41) is arranged at the top of the box body (1); the first heating chamber (41) is conical; the top end of the first heating chamber (41) is an air inlet; the bottom end of the first heating chamber (41) is an air outlet; the air outlet is connected to the box body (1); and the diameter of the air inlet is smaller than the diameter of the air outlet; A plurality of heating tubes (42) are evenly arranged on the inner wall of the first heating chamber (41); A fan (43) is arranged at the air inlet, and the fan (43) is used to guide air from the air inlet to the air outlet.

5. The solution-based nanofiber spinning device according to claim 4, further comprising: A plurality of temperature sensors (36) are respectively arranged in the first heating chamber (41), in the box body (1), and in the second heating chamber (34).

6. A solution-based nanofiber spinning device according to claim 3, characterized in that: The receiving component (8) comprises: Two rotating shafts are respectively arranged horizontally on the side walls of the box body (1), and the two ends of the rotating shafts are respectively rotatably connected to the side walls of the box body (1); A motor (81) having an output end, wherein the output end of the motor (81) is connected to one of the rotating shafts; The net curtain (82) is annular and is sleeved around the two rotating shafts; The second fan (83) is arranged at the bottom end of the box body (1), and the second fan (83) is located below the mesh curtain (82). The second fan (83) and the hot air component (4) jointly deposit fibers on the mesh curtain (82).

7. The solution-based nanofiber spinning device according to claim 1, characterized in that: The included angle between the second through hole (23) and the horizontal plane is -30° to 30°, and the included angle between the second through hole (23) and the vertical plane is 30° to 80°.

8. The solution-based nanofiber spinning device according to claim 1, characterized in that: The spinning die set (2) is provided with a plurality of sets, and further comprises: Two guide rails (5) are horizontally mounted in the box (1), one of the guide rails (5) is arranged along the length direction of the box (1), and the other guide rail (5) is arranged along the width direction of the box (1). The spinning die heads (21) and high-voltage electrostatic rings (22) in multiple groups of the spinning module groups (2) are slidably connected to the bottom of the two guide rails (5) through sliding rods, and the sliding rods of the spinning die heads (21) and high-voltage electrostatic rings (22) in each group of the spinning module groups (2) are connected through connecting rods.

9. The solution-based nanofiber spinning device according to claim 1, characterized in that: The spinning die head (21) is made of polyetheretherketone material.

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