One-step method rapid prototyping centrifugal blowing electrostatic spinning equipment and use method thereof

Abstract

The invention discloses one-step method rapid prototyping centrifugal blowing electrostatic spinning equipment and a use method thereof, and relates to the technical field of nanofiber preparation equipment.The one-step method rapid prototyping centrifugal blowing electrostatic spinning equipment comprises a rack, a centrifugal electrostatic spinning module, an airflow auxiliary module, an instantaneous heat treatment module and a fiber collecting module, and the fiber collecting module is arranged on the lower portion of the instantaneous heat treatment module; the instantaneous heat treatment module is arranged on the lower portion of the centrifugal electrostatic spinning module, the centrifugal electrostatic spinning module is connected with the airflow auxiliary module, and the airflow auxiliary module and the centrifugal electrostatic spinning module are both connected with the rack. According to the one-step method rapid prototyping centrifugal blowing electrostatic spinning equipment and the using method thereof, the whole-process integrated continuous operation from fiber prototyping to structure shaping is achieved, and prepared nanofibers have the advantages of being uniform in structure, excellent in mechanical property, high in thermal stability and high in orientation; the method is suitable for large-scale preparation in the fields of wide-temperature-range heat insulation and cold insulation materials, high-performance battery diaphragms, filtering materials, biological tissue engineering scaffolds and the like.

Description

Technical Field

[0001] This invention relates to the field of nanofiber preparation equipment technology, and in particular to a one-step rapid prototyping centrifugal blow electrospinning equipment and its usage method. Background Technology

[0002] Electrospinning is one of the mainstream methods for preparing nanofibers, widely used in energy, biology, filtration, and composite materials. Existing equipment often lacks an online heat treatment system, requiring secondary processing after fiber formation, which affects structural integrity and performance consistency. Some equipment has attempted to combine centrifugal force and electrostatic field to improve fiber stretching efficiency and yield, but the following problems still exist: The lack of an airflow-assisted system results in poor fiber collection uniformity; the separation of spinning and heat treatment processes leads to loose fiber structure and decreased performance; the low integration of equipment and complex operation make it difficult to achieve continuous production. Summary of the Invention

[0003] The purpose of this invention is to provide a one-step rapid prototyping centrifugal blow electrospinning equipment and its usage method, so as to achieve efficient, continuous and controllable preparation of nanofibers.

[0004] To achieve the above objectives, the present invention provides a one-step rapid prototyping centrifugal blow electrospinning device, comprising a frame, a centrifugal electrospinning module, an airflow assist module, an instantaneous heat treatment module, and a fiber collection module. The fiber collection module is located below the instantaneous heat treatment module, which is also located below the centrifugal electrospinning module. The centrifugal electrospinning module is connected to the airflow assist module, and both the airflow assist module and the centrifugal electrospinning module are connected to the frame.

[0005] Preferably, the centrifugal electrospinning module includes a centrifugal turntable, the main shaft of the centrifugal turntable is connected to the carbon brush, the main shaft is connected to the drive motor, the side wall of the centrifugal turntable is provided with a spinning port, and multiple spinning ports are provided, which are distributed axially along the side wall of the centrifugal turntable. The upper part of the centrifugal turntable is provided with a feed port, which passes through the frame.

[0006] Preferably, the airflow assist module includes a pressure stabilizing chamber, which is configured as an annular structure and is symmetrically arranged about the main axis. The lower part of the pressure stabilizing chamber is connected to the gas unit through a damping pipe, and the upper part of the pressure stabilizing chamber is connected to an air intake pipe. Multiple air intake pipes are provided.

[0007] Preferably, an air curtain is provided on the outer wall of the pressure stabilizing cavity near the centrifugal turntable, the air curtain is arranged along the circumference of the pressure stabilizing cavity, and the inclination angle of the air curtain is set to 0-60°.

[0008] Preferably, the instantaneous heat treatment module includes a combustion chamber, the end of which is connected to a natural gas inlet and a combustion-supporting gas inlet, a combustion chamber spark plug is installed on the side wall of the combustion chamber, the end of the combustion chamber is a combustion chamber outlet, and the combustion chamber is a hollow internal structure with three annular holes around its perimeter.

[0009] Preferably, the width of the annular hole in the combustion chamber is 3 to 15 mm.

[0010] Preferably, the centrifugal disc rotates at a speed of 1000~12000 rpm, the centrifugal disc has a diameter of 50-500 mm, the sidewall has 2-10 layers of spinning nozzles, the width of the spinning nozzles is 0.2~5 mm, and the number is 5-5000.

[0011] Preferably, the fiber collection module is a conveyor belt.

[0012] The operating method of a one-step rapid prototyping centrifugal blow electrospinning equipment includes the following steps: Step 1: Prepare the spinning solution by adding it to the feed inlet of the centrifugal disc and maintaining a certain temperature. Step 2: Set the target ambient temperature, centrifuge speed, working voltage, airflow parameters, and collect its motion parameters and heat treatment parameters; Step 3: Start the drive motor, centrifugal turntable and high voltage electrostatic generator. The spinning solution is stretched and accelerated out from the spinning nozzle to form a fine jet. Step 4: Air is introduced through the airflow auxiliary module. After the gas flows evenly through the damping pipe, it enters the pressure stabilizing chamber and finally forms a cone-shaped air curtain from the center of the annular micropore. Step 5: The accumulated fiber web moves into the instant heat treatment module with the conveyor belt. High-temperature flames are ejected from the combustion chamber outlet to perform instant heat treatment on the fiber web. Step 6: The heat-treated fiber membrane is peeled off from the mesh belt and collected.

[0013] Preferably, the temperature of the instantaneous heat treatment in step four is 200°C to 1200°C, and the treatment time is 0.1 seconds to 5 seconds.

[0014] Therefore, this invention employs the aforementioned one-step rapid prototyping centrifugal blow electrostatic spinning equipment and its usage method. Through the setting of an airflow-assisted module, the fiber morphology is further optimized, effectively preventing fiber dispersion and adhesion during spinning. It allows for secondary stretching of the fibers, refining the fiber diameter and improving the uniformity and continuity of fiber fineness, thus solving the problems of uneven fiber dispersion and irregular morphology in traditional spinning. The instantaneous heat treatment module rapidly generates a high-temperature airflow that diffuses evenly through annular holes, achieving instantaneous and uniform heating of the freshly spun fibers. Simultaneously, it avoids damage to the fiber structure caused by prolonged heating, balancing treatment effectiveness with fiber integrity.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the one-step rapid prototyping centrifugal jet electrospinning equipment of the present invention; Figure 2 This is a partially enlarged schematic diagram of the airflow assist module of the present invention. Figure 1 ; Figure 3 This is a partially enlarged schematic diagram of the airflow assist module of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the centrifugal electrospinning device of the present invention; Figure 5 This is a schematic diagram of the high-temperature instantaneous heat treatment combustion chamber device of the present invention; Figure Labels 1. Fixing bolts; 2. Main shaft; 3. Carbon brush; 4. Air inlet of airflow auxiliary module; 5. Pressure stabilizing chamber; 6. Damping pipe; 7. Feed inlet; 8. Spinning inlet; 9. Centrifugal turntable; 10. Instantaneous heat treatment module; 11. Combustion chamber outlet; 12. Combustion chamber spark plug; 13. Combustion chamber natural gas inlet; 14. Airflow auxiliary module; 15. Combustion chamber; 16. Centrifugal electrostatic spinning module. Detailed Implementation

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example Please see Figures 1-5This invention provides a one-step rapid prototyping centrifugal blow electrospinning equipment, including a frame, a centrifugal electrospinning module 16, an airflow auxiliary module 14, an instant heat treatment module 10, and a fiber collection module. The fiber collection module is located at the lower part of the instant heat treatment module 10, which is located at the lower part of the centrifugal electrospinning module 16. The centrifugal electrospinning module 16 is connected to the airflow auxiliary module 14. Both the airflow auxiliary module 14 and the centrifugal electrospinning module 16 are connected to the frame. All components are connected through the frame and are fastened and adjusted using fixing bolts 1.

[0020] The centrifugal electrospinning module 16 includes a centrifugal turntable 9. The main shaft 2 of the centrifugal turntable 9 is connected to a carbon brush 3. The carbon brush 3 is used to stably conduct the positive voltage generated by the high voltage electrostatic generator to the rotating centrifugal turntable 9. The carbon brush 3 is installed at the contact part between the main shaft 2 and the frame. The main shaft 2 is connected to the drive motor. The side wall of the centrifugal turntable 9 is provided with a spinning port 8. Multiple spinning ports 8 are provided and distributed axially along the side wall of the centrifugal turntable 9. The upper part of the centrifugal turntable 9 is provided with a feed port 7, which is connected to the temperature control liquid supply system through a pipeline. The feed port 7 passes through the frame.

[0021] The centrifugal disc 9 rotates at 1000~12000 rpm, and the width of the spinning inlet 8 is 0.2~5 mm. The diameter of the centrifugal disc is 50-500 mm, and the number of spinning inlets on the side wall is 2-10 layers.

[0022] The number of wire-spinning nozzles ranges from 5 to 5000, and the diameter of the nozzles ranges from 0.2 to 5 mm.

[0023] A ring-shaped airflow auxiliary module 14 is coaxially sleeved around the centrifugal turntable 9. The airflow auxiliary module 14 includes a pressure stabilizing chamber 5, which is configured as a ring structure and is symmetrically arranged about the main shaft 2. The lower part of the pressure stabilizing chamber 5 is connected to the gas unit through a damping pipe 6, and the upper part of the pressure stabilizing chamber 5 is connected to the air inlet pipe. Multiple air inlet pipes are provided. The air inlet 4 of the airflow auxiliary module 14 is located on the side of the device and is used to introduce air.

[0024] An air curtain is provided on the outer wall of the pressure stabilizing chamber 5 near the centrifugal turntable 9. The air curtain is arranged around the circumference of the pressure stabilizing chamber 5, and the inclination angle of the air curtain is set to 0-60°.

[0025] The instantaneous heat treatment module 10, under the action of the airflow assist module 14, vertically blows the fibers after spinning through the centrifugal turntable 9 into the annular combustion chamber 15 for instantaneous heat treatment. The instantaneous heat treatment module 10 includes a combustion chamber 15, with a natural gas inlet and a combustion-supporting gas inlet at the end of the combustion chamber 15. A combustion chamber spark plug 12 is installed on the side wall of the combustion chamber 15, and the end of the combustion chamber 15 is a combustion chamber outlet 11. The ejected high-temperature flame or heat flow directly acts on the newly formed fiber web. The outlet has a structure of 1-10 annular holes, with the outlet angle set downwards at 0-10° to ensure that the overall airflow direction of the entire spinning equipment is always downwards, helping the fiber to be drawn and fall onto the receiver. The annular hole structure is supported by multiple high-temperature resistant ceramic alumina, with an annular hole width of 3-15 mm, and the annular holes are made of high-temperature resistant and heat-resistant material.

[0026] The fiber collection module is a conveyor belt used to collect the formed fibers.

[0027] In this embodiment, the dimensions and constraint distances of the processing modules are as follows: the height of the airflow auxiliary module 14 is 10-30cm, the width is 10-50cm, the height of the centrifugal turntable 9 is 2-8cm, the bottom width is 5-15cm, the top width is 6-16cm, the distance from the centrifugal turntable 9 to the instantaneous heat treatment module 10 is 10-150cm, the top width of the instantaneous heat treatment module 10 is 10-100cm, the bottom width is 8-80cm, and the distance from the instantaneous heat treatment module 10 to the collection module is 10-100cm.

[0028] The operating method of a one-step rapid prototyping centrifugal blow electrospinning equipment includes the following steps: Step 1: Prepare the spinning solution. Add the spinning solution to the centrifugal disc inlet 7, maintain a certain temperature, and start the liquid supply pump. The spinning solution is continuously injected into the high-speed rotating centrifugal disc 9 through the pipeline from the centrifugal disc inlet 7.

[0029] Step 2: Set the target ambient temperature, centrifugal speed, working voltage, airflow parameters, and collect its motion parameters and heat treatment parameters.

[0030] Step 3: Start the drive motor to rotate the centrifugal disc 9 at a speed of 1000-12000 rad / s. Simultaneously, turn on the high-voltage electrostatic generator, applying a 25kV voltage to the centrifugal disc 9 through the carbon brush 3 and the main shaft 2. Under the combined action of strong centrifugal force and the high-voltage electrostatic field, the spinning solution is stretched and accelerated out from the spinning nozzle 8 of the centrifugal disc 9, forming a fine jet. The jet is rapidly stretched, refined, and the solvent evaporates in the air, solidifying into nanofibers.

[0031] Step 4: Activate the gas temperature control unit and introduce air through the air inlet 4 of the airflow auxiliary module. After passing through the damping pipe 6 for uniform flow, the gas enters the pressure stabilizing chamber 5, and finally forms a uniform, low-temperature, high-speed (approximately 15 m / s) conical laminar flow air curtain from the annular micropores. This low-temperature air curtain envelops and further stretches the fiber jet that flies out from the spinning nozzle 8, accelerating solvent evaporation on the one hand, and inhibiting fiber adhesion in the low-temperature environment on the other hand, resulting in a more uniform fiber diameter distribution. At the same time, the controllable airflow effectively guides the fibers to the downward-moving metal mesh collector, improving collection efficiency and fiber web uniformity.

[0032] The instantaneous heat treatment temperature is 200℃ to 1200℃, and the treatment time is 0.1 seconds to 5 seconds.

[0033] Step 5: The accumulated fiber web moves along the conveyor belt into the instantaneous heat treatment module 10. A mixture of methane and air is pre-introduced through the combustion chamber natural gas inlet 13 and ignited by the combustion chamber spark plug 12, generating a clean flame of approximately 1000°C within the combustion chamber 15. The high-temperature flame is ejected from the combustion chamber outlet 11, providing instantaneous (contact time approximately 0.5 seconds) heat treatment to the fiber web passing below. This process thoroughly removes residual solvents from the fibers, induces polymer crystallization, and may cause surface activation of the doped ceramic particles, thereby significantly improving the mechanical strength, thermal stability, and functional properties of the fiber membrane without damaging the three-dimensional structure of the fibers.

[0034] Step 6: The fiber membrane, after instantaneous heat treatment, is peeled off from the mesh belt and finally collected by the winding device. The collection device is equipped with a negative voltage generator with a voltage range of -5kV to -20kV, to obtain the final functional nanofiber nonwoven fabric material.

[0035] A nanofiber material is prepared by the method described above. The nanofiber material can be used as a lithium-ion battery separator, an air filtration material, or a tissue engineering scaffold.

[0036] Therefore, this invention employs the aforementioned one-step rapid prototyping centrifugal blow electrospinning equipment and its usage method. Through the inclusion of an airflow-assisted module, fiber morphology is further optimized, effectively preventing fiber dispersion and adhesion during spinning. The fiber can be stretched a second time, refining its diameter and improving its fineness uniformity and continuity, thus solving the problems of uneven fiber dispersion and irregular morphology in traditional spinning. The instantaneous heat treatment module rapidly generates a high-temperature airflow that diffuses uniformly through annular holes, achieving instantaneous and uniform heating of the freshly spun fibers. This avoids damage to the fiber structure caused by prolonged heating, balancing treatment effectiveness and fiber integrity. Integrating centrifugal spinning, airflow assistance, and instantaneous heat treatment, this invention achieves efficient, continuous, and controllable preparation of nanofibers.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A one-step rapid prototyping centrifugal blow electrostatic spinning equipment, characterized in that: The device includes a frame, a centrifugal electrospinning module, an airflow assist module, an instantaneous heat treatment module, and a fiber collection module. The fiber collection module is located below the instantaneous heat treatment module, which is also located below the centrifugal electrospinning module. The centrifugal electrospinning module is connected to the airflow assist module, and both the airflow assist module and the centrifugal electrospinning module are connected to the frame.

2. The one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 1, characterized in that: The centrifugal electrospinning module includes a centrifugal turntable, the main shaft of the centrifugal turntable is connected to the carbon brush, the main shaft is connected to the drive motor, the side wall of the centrifugal turntable is provided with a spinning port, and multiple spinning ports are provided, which are distributed axially along the side wall of the centrifugal turntable. The upper part of the centrifugal turntable is provided with a feed port, which passes through the frame.

3. The one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 1, characterized in that: The airflow assist module includes a pressure stabilizing chamber, which is configured as a ring structure and is symmetrically arranged about the main axis. The lower part of the pressure stabilizing chamber is connected to the gas unit through a damping pipe, and the upper part of the pressure stabilizing chamber is connected to the air intake pipe, which is provided with multiple air intake pipes.

4. The one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 3, characterized in that: An air curtain is provided on the outer wall of the pressure stabilizing chamber near the centrifugal turntable. The air curtain is arranged along the circumference of the pressure stabilizing chamber, and the inclination angle of the air curtain is set to 0-60°.

5. The one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 1, characterized in that: The instantaneous heat treatment module includes a combustion chamber, with an inlet for natural gas and an inlet for combustion-supporting gas at its end. A spark plug is installed on the side wall of the combustion chamber, and the end of the combustion chamber is the outlet for the combustion chamber. The combustion chamber is a hollow structure with three annular holes around its perimeter.

6. The one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 5, characterized in that: The width of the annular hole in the combustion chamber is 3-15 mm.

7. The one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 2, characterized in that: The centrifugal disc rotates at a speed of 1000~12000 rpm, has a diameter of 50-500 mm, has 2-10 layers of spinning nozzles on the side wall, has a width of 0.2~5 mm, and has 5-5000 nozzles.

8. The one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 1, characterized in that: The fiber collection module is a conveyor belt.

9. A method of using the one-step rapid prototyping centrifugal jet electrospinning equipment according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Prepare the spinning solution by adding it to the feed inlet of the centrifugal disc and maintaining a certain temperature. Step 2: Set the target ambient temperature, centrifuge speed, working voltage, airflow parameters, and collect its motion parameters and heat treatment parameters; Step 3: Start the drive motor, centrifugal turntable and high voltage electrostatic generator. The spinning solution is stretched and accelerated out from the spinning nozzle to form a fine jet. Step 4: Air is introduced through the airflow assist module. After the gas flows evenly through the damping pipe, it enters the pressure stabilizing chamber and finally forms a cone-shaped air curtain from the center of the annular micropore. Step 5: The accumulated fiber web moves into the instant heat treatment module with the conveyor belt. High-temperature flames are ejected from the combustion chamber outlet to perform instant heat treatment on the fiber web. Step 6: The heat-treated fiber membrane is peeled off from the mesh belt and collected.

10. The method of using the one-step rapid prototyping centrifugal blow electrospinning equipment according to claim 9, characterized in that: In step four, the instantaneous heat treatment temperature is 200℃ to 1200℃, and the treatment time is 0.1 seconds to 5 seconds.

Images