阅读说明：本技术 一种静电纺丝的制备设备及制备工艺 (Electrostatic spinning preparation equipment and preparation process ) 是由 杨振宝 邱凯坤 于 2021-06-28 设计创作，主要内容包括：本发明公开了一种静电纺丝的制备设备,包括纺丝机箱体、纺丝接收装置及纺丝烘干装置,还包括注射器、推进装置、气流辅助装置及辅助气源,注射器包括推杆、注射筒及纺丝针头,纺丝针头指向接收板；推进装置与推杆连接,用于为推杆提供往复驱动力；气流辅助装置包括通气管路及气流罩,通气管路布设在注射器与接收板之间,纺丝针头穿过通气管路,气流罩与纺丝针头对应设在通气管路的底部,气流罩背向通气管路的出气口与纺丝针头的出液口同轴且齐平；辅助气源用以提供压缩空气。本发明在传统高压的基础上引入辅助气流,使其在静电纺丝的过程中加快丝体的拉出,对纺丝体的成型后的直径以及纺丝体的烘干和出丝量有着较大的提升。(The invention discloses electrostatic spinning preparation equipment, which comprises a spinning machine box body, a spinning receiving device, a spinning drying device, an injector, a propelling device, an airflow auxiliary device and an auxiliary air source, wherein the injector comprises a push rod, an injection tube and a spinning needle head, and the spinning needle head points to a receiving plate; the propelling device is connected with the push rod and is used for providing reciprocating driving force for the push rod; the air flow auxiliary device comprises an air pipeline and an air flow cover, the air pipeline is arranged between the injector and the receiving plate, the spinning needle head penetrates through the air pipeline, the air flow cover and the spinning needle head are correspondingly arranged at the bottom of the air pipeline, and an air outlet of the air flow cover, which is back to the air pipeline, is coaxial with and flush with a liquid outlet of the spinning needle head; the auxiliary air source is used for providing compressed air. The invention introduces the auxiliary airflow on the basis of the traditional high pressure, so that the drawing of the spinning body is accelerated in the electrostatic spinning process, and the formed diameter of the spinning body and the drying and spinning amount of the spinning body are greatly improved.)

1. A preparation device of electrostatic spinning comprises a spinning machine box body, a spinning receiving device and a spinning drying device, wherein the spinning receiving device comprises a receiving plate and a spinning receiving cylinder, and is characterized by also comprising an injector, a propelling device, an airflow auxiliary device and an auxiliary air source,

the injector comprises a push rod, an injection tube and a spinning needle head, and the spinning needle head points to the receiving plate;

the propelling device is connected with the push rod and is used for providing reciprocating driving force for the push rod;

the airflow auxiliary device comprises an air vent pipeline and an airflow cover, the air vent pipeline is arranged between the injector and the receiving plate, the spinning needle head penetrates through the air vent pipeline along the radial direction of the air vent pipeline, the airflow cover and the spinning needle head are correspondingly arranged at the bottom of the air vent pipeline, and an air outlet of the airflow cover, which is back to the air vent pipeline, is coaxial with and flush with a liquid outlet of the spinning needle head;

the auxiliary air source is communicated with the vent pipeline and used for providing compressed air.

2. The electrospinning preparation apparatus of claim 1, wherein the number of the injectors is two or more, the propulsion device comprises a plurality of independently disposed propulsion units, the number of the propulsion units is not less than the number of the injectors, each injector is independently connected with one propulsion unit, and the plurality of propulsion units propel the injectors together or propel the injectors independently.

3. The electrospinning preparation apparatus of claim 2, wherein the propulsion unit is a peristaltic pump.

4. The electrospinning preparation apparatus of claim 2, wherein the air flow assisting device further comprises an air flow adjusting element disposed in cooperation with the air flow hood, the air flow adjusting element being configured to control and adjust an air flow rate of the air flow hood.

5. The electrospinning preparation apparatus of claim 1, further comprising a vertical lifting platform, wherein the vertical lifting platform comprises a lifting element and a carrying platform, the carrying platform is used for fixing and carrying the propelling device and the injector, and the lifting element provides driving force for the carrying platform to lift in a vertical direction.

6. The preparation process of electrostatic spinning is characterized by comprising the following steps:

s1, preparing a spinning solution, wherein the spinning solution comprises a solute and a solvent, and the mass of the solute accounts for 8% -50% of that of the spinning solution;

s2, checking the electrostatic spinning preparation equipment to ensure that the components for supplying power and air work normally;

s3, switching on a main power supply and a ventilation pipeline, and setting parameters of a high-voltage power supply and parameters of a spinning process;

s4, controlling the vertical lifting platform, and adjusting the distance between a liquid outlet of the spinning needle head and a receiving plate of the spinning receiving device;

s5, adjusting the position of the propulsion unit, installing an airflow auxiliary device and an injector, filling spinning solution, and setting the propulsion speed of the propulsion unit;

s6, closing a box door of the spinning machine, and checking a high-voltage power supply;

s7, switching on a high-voltage power supply, starting a spinning switch, enabling the propulsion unit to run at a low speed, and enabling the yarn collecting barrel to rotate to start spinning;

and S8, ending spinning, turning off the high-voltage power supply, and then turning on a box door of the spinning machine.

7. The electrospinning production process according to claim 6, wherein the mass of the solute in step S1 is 8% to 10% of the mass of the spinning solution.

8. The electrospinning production process of claim 6, wherein the voltage range of the high-voltage power supply in step S3 is 10.0 kV-15.0 kV.

9. The electrospinning production process of claim 6, wherein the spinning process parameters in the step S3 include flow rate of an air vent line, target value of temperature and humidity in a box of a spinning machine, temperature of spinning airflow, rotation speed of a take-up cylinder and outflow rate of a single spinning needle.

10. The electrospinning production process according to claim 9, wherein the liquid outflow rate of a single spinning needle is in the range of 0.02ml/h to 0.08 ml/h.

Technical Field

The invention relates to the technical field of electrostatic spinning production, in particular to electrostatic spinning preparation equipment and a preparation process.

Background

The spinning machine is a machine for forming filaments from a solution or a melt of a polymer, and can be subdivided into a wet spinning machine, a melt spinning machine and a dry spinning machine according to different spinning preparation methods.

In the prior art, the traditional industrial spinning machine technology cannot obtain nano-grade fibers. In order to obtain finer fibers, electrostatic spinning machines have been developed. By the action of a strong electric field, the polymer solution changes from a spherical shape to a conical shape and spreads into fiber filaments at the tip of the cone. By this method, polymer filaments of nanometer-scale diameter can be obtained. However, the extreme brittleness of electrospun fibers limits the development of applications, and therefore, the development of flexible and efficient fibers is an important issue to be produced.

Factors affecting the quality of electrospinning include voltage, spinning solution, and the distance between the needle and the receiving plate. The larger the voltage, the more the solution will generate a taylor cone at a large voltage and make the spin thinner. When the spinning solution has certain conductivity and certain viscosity, the liquid forms a taylor cone under the constraint of charge and surface tension, and certain temperature and humidity conditions are required in the spinning process in consideration of the volatility of the solution. If the distance between the needle and the receiving plate is too small or too large, the filaments are less prone to forming filaments, and if the distance is too small, the filaments become thicker and have liquid droplets due to insufficient time for drawing and solvent evaporation. When the spinning distance is too large, the board may not receive the filaments.

Therefore, a preparation device and a preparation process capable of efficiently preparing electrostatic spinning are needed in the technical field.

Disclosure of Invention

In order to solve the technical problems, the invention provides a preparation device and a preparation process which are simple in structural configuration, flexible and convenient to adjust and capable of efficiently preparing electrostatic spinning.

In order to achieve the purpose, the technical scheme of the invention is as follows:

on one hand, the invention discloses preparation equipment of electrostatic spinning, which comprises a spinning machine box body, a spinning receiving device and a spinning drying device, wherein the spinning drying device dries spinning in an infrared illumination mode, and the drying temperature can be adjusted within the range from room temperature to 70 ℃; the spinning receiving device comprises a receiving plate and a spinning drum, and further comprises an injector, a propelling device, an airflow auxiliary device and an auxiliary air source, wherein the injector comprises a push rod, an injection tube and a spinning needle head, and the spinning needle head points to the receiving plate; the propelling device is connected with the push rod and is used for providing reciprocating driving force for the push rod; the airflow auxiliary device comprises an air vent pipeline and an airflow cover, the air vent pipeline is arranged between the injector and the receiving plate, the spinning needle head penetrates through the air vent pipeline along the radial direction of the air vent pipeline, the airflow cover and the spinning needle head are correspondingly arranged at the bottom of the air vent pipeline, and an air outlet of the airflow cover, which is back to the air vent pipeline, is coaxial with and flush with a liquid outlet of the spinning needle head; the auxiliary air source is communicated with the vent pipeline and used for providing compressed air.

The beneficial effect of adopting above-mentioned technical scheme is: the problems of low electrostatic spinning drawing-out speed, low production efficiency and poor spinning continuity in the prior art are fully considered, and the auxiliary airflow is introduced on the basis of the traditional high pressure to accelerate the drawing-out of the spinning body in the electrostatic spinning process, so that the diameter of the formed spinning body and the drying and yarn output of the spinning body are greatly improved. Specifically, by arranging the air flow auxiliary device and the auxiliary air source, high-speed air flow in the same direction as the spinning pulling-out direction is constructed at the spinning needle head of the injector, the driving force of the high-speed air flow is superposed on the basis of strong electric field tension, the spinning pulling-out speed is greatly improved, and the diameter of the electrostatic spinning filament is obviously reduced.

As a further improvement of the technical scheme of the invention, the number of the syringes is more than two, the propulsion device comprises a plurality of independently arranged propulsion units, the number of the propulsion units is not less than the number of the syringes, each syringe is independently connected with one propulsion unit, and the plurality of propulsion units propel the syringes together or propel the syringes independently.

The beneficial effect of adopting above-mentioned technical scheme is: the number of the propelling units is set to be not less than that of the syringes, which is helpful for ensuring that each syringe is provided with propelling power by the independent propelling unit, is convenient for realizing the purpose that all syringes are propelled simultaneously or one syringe is propelled independently, and the control of the syringes is more flexible.

As still further improvement of the technical scheme of the invention, the propulsion unit is a peristaltic pump.

The beneficial effect of adopting above-mentioned technical scheme is: the peristaltic pump is used as a propulsion unit, the advantages of good stability, high precision, no pollution, good sealing performance and simplicity in maintenance of the peristaltic pump are fully utilized, particularly for the high-precision requirement of preparation of electrostatic spinning on flow control of spinning solution, the advantages of the peristaltic pump are more obvious, and the propulsion speed of the propulsion device using the peristaltic pump as the propulsion unit can be adjusted within the range of (0.001-1) mL/min.

As a still further improvement of the technical solution of the present invention, the airflow auxiliary device further includes an airflow adjusting element, the airflow adjusting element is disposed in cooperation with the airflow hood, and the airflow adjusting element is used for controlling and adjusting the airflow rate of the airflow hood.

The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the airflow adjusting element is convenient for adjusting the airflow at each spinning needle head.

As a further improvement of the technical scheme of the invention, the electrostatic spinning preparation equipment further comprises a vertical lifting platform, wherein the vertical lifting platform comprises a lifting element and a bearing platform, the bearing platform is used for fixing and bearing the propelling device and the injector, and the lifting element provides driving force for the bearing platform to lift in the vertical direction.

The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the vertical lifting platform facilitates the lifting of the propelling device and the injector, so that the distance between the injector and the receiving plate can be adjusted to meet the requirements of different spinning solutions on the distance between the spinning needle head and the receiving plate.

On the other hand, the invention further discloses a preparation process of electrostatic spinning, which comprises the following steps:

s1, preparing a spinning solution, wherein the spinning solution comprises a solute and a solvent, and the mass of the solute accounts for 8% -50% of that of the spinning solution;

s2, checking the electrostatic spinning preparation equipment to ensure that the components for supplying power and air work normally;

s3, switching on a main power supply and a ventilation pipeline, and setting parameters of a high-voltage power supply and parameters of a spinning process;

s4, controlling the vertical lifting platform, and adjusting the distance between a liquid outlet of the spinning needle head and a receiving plate of the spinning receiving device;

s5, adjusting the position of the propulsion unit, installing an airflow auxiliary device and an injector, filling spinning solution, and setting the propulsion speed of the propulsion unit;

s6, closing a box door of the spinning machine, and checking a high-voltage power supply;

s7, switching on a high-voltage power supply, starting a spinning switch, enabling the propulsion unit to run at a low speed, and enabling the yarn collecting barrel to rotate to start spinning;

and S8, ending spinning, turning off the high-voltage power supply, and then turning on a box door of the spinning machine.

The beneficial effect of adopting above-mentioned technical scheme is: by manufacturing the electrostatic spinning through the preparation process, the preparation efficiency is high, the electrostatic spinning quality is stable, the operation is standard, the unnecessary work-wasting phenomenon is reduced, and the safety risk is effectively reduced.

As a further improvement of the technical solution of the present invention, the mass of the solute in step S1 is 8-10% of the mass of the spinning solution.

The beneficial effect of adopting above-mentioned technical scheme is: the viscosity of the spinning solution is most suitable when the ratio of the solute mass to the mass of the spinning solution is 8% to 10% regardless of whether the spinning solution is a Polyacrylonitrile (PAN) -based N, N-Dimethylformamide (DMF) spinning solution, a polyvinylpyrrolidone (PVP) -based ethanol spinning solution, or a polyvinyl alcohol (PVA) -based pure water solution.

As a further improvement of the technical scheme of the invention, the voltage range of the high-voltage power supply in the step S3 is 10.0 kV-15.0 kV.

The beneficial effect of adopting above-mentioned technical scheme is: no matter the spinning solution is Polyacrylonitrile (PAN) -based N, N-Dimethylformamide (DMF) spinning solution or polyvinylpyrrolidone (PVP) -based ethanol spinning solution or polyvinyl alcohol (PVA) -based pure water solution, when the voltage of a high-voltage power supply is in the range of 10.0kV to 15.0kV, the prepared electrostatic spinning filament has moderate diameter and thickness and is more stable to prepare.

As a further improvement of the technical solution of the present invention, the spinning process parameters in the step S3 include a flow rate of an air vent line, a target value of temperature and humidity in a box of a spinning machine, a temperature of a spinning airflow, a rotation speed of a yarn collecting tube, and a liquid outlet flow rate of a single spinning needle.

The beneficial effect of adopting above-mentioned technical scheme is: through the setting of the flow of the ventilation pipeline, the liquid outlet flow of the spinning needle head, the temperature, the humidity and the air flow temperature in the box body of the spinning machine, corresponding parameters can be adjusted conveniently, so that the preparation requirements of different spinning fibers can be met by adapting to the characteristics of different spinning solutions.

As a further improvement of the technical scheme of the invention, the liquid outlet flow range of a single spinning needle head is 0.02 ml/h-0.08 ml/h.

The beneficial effect of adopting above-mentioned technical scheme is: no matter the spinning solution is Polyacrylonitrile (PAN) -based N, N-Dimethylformamide (DMF) spinning solution or polyvinylpyrrolidone (PVP) -based ethanol spinning solution or polyvinyl alcohol (PVA) -based pure water solution, when the liquid outlet flow of a single spinning needle head is in the range of 0.02 ml/h-0.08 ml/h, the prepared electrostatic spinning filament has moderate diameter and thickness, and the electrostatic spinning preparation is more efficient and stable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an apparatus for producing electrospun fibers according to the present invention;

FIG. 2 is a schematic diagram of a single gas flow assisted electrospinning preparation principle of the present invention;

the corresponding part names indicated by the numbers in the figures are as follows:

a spinning machine manifold 1; a temperature and humidity sensor 11; a spinning receiving device 2; a receiving plate 21; a wire take-up drum 22; a spinning drying device 3; a syringe 4; a push rod 41; a syringe 42; a spinning needle 43; a propulsion device 5; a propulsion unit 51; a peristaltic pump 511; an airflow assisting device 6; a vent line 61; an airflow hood 62; the airflow adjusting member 63; a gas pressure gauge 64; an oil-gas separator 65; an auxiliary gas source 7; a vertical lifting platform 8; a lifting member 81; a load-bearing platform 82; and an air exhaust device 9.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In order to realize the purpose of the invention, the technical scheme provided by the invention is as follows:

in some embodiments of the present invention, as shown in fig. 1 and 2, the present invention discloses a preparation apparatus for electrostatic spinning, which includes a spinning machine box 1, a spinning receiving device 2 and a spinning drying device 3, wherein a temperature and humidity sensor 11 is disposed in the spinning machine box 1 for measuring the temperature and humidity of air in the spinning machine box 1 in real time; the spinning drying device 3 dries the spinning by means of infrared illumination, and the drying temperature can be adjusted within the range from room temperature to 70 ℃; the spinning receiving device 2 comprises a receiving plate 21 and a spinning cylinder 22, and also comprises an injector 4, a propulsion device 5, an airflow auxiliary device 6 and an auxiliary air source 7, wherein the injector 4 comprises a push rod 41, an injection cylinder 42 and a spinning needle head 43, and the spinning needle head 43 points to the receiving plate 21; the propelling device 5 is connected with the push rod 41 and is used for providing reciprocating driving force for the push rod 41; the airflow auxiliary device 6 comprises an air duct 61 and an airflow cover 62, the air duct 61 is arranged between the injector 4 and the receiving plate 21, the spinning needle head 43 penetrates through the air duct 61 along the radial direction of the air duct 61, the airflow cover 62 and the spinning needle head 63 are correspondingly arranged at the bottom of the air duct 61, and an air outlet of the airflow cover 62, which is back to the air duct 61, is coaxial and flush with a liquid outlet of the spinning needle head 43; the auxiliary air supply 7 communicates with the vent line 61 for providing compressed air.

The beneficial effect of adopting above-mentioned technical scheme is: the problems of low electrostatic spinning drawing-out speed, low production efficiency and poor spinning continuity in the prior art are fully considered, and the auxiliary airflow is introduced on the basis of the traditional high pressure to accelerate the drawing-out of the spinning body in the electrostatic spinning process, so that the diameter of the formed spinning body and the drying and yarn output of the spinning body are greatly improved. Specifically, by arranging the air flow auxiliary device and the auxiliary air source, high-speed air flow in the same direction as the spinning pulling-out direction is constructed at the spinning needle head of the injector, the driving force of the high-speed air flow is superposed on the basis of strong electric field tension, the spinning pulling-out speed is greatly improved, and the diameter of the electrostatic spinning filament is obviously reduced.

In other embodiments of the present invention, as shown in fig. 1, the number of the syringes 4 is two or more, the propelling device 5 includes a plurality of independently disposed propelling units 51, the number of the propelling units 51 is not less than the number of the syringes 4, each syringe 4 is independently connected to one propelling unit 51, and the plurality of propelling units 51 propel the syringes 4 together or propel the syringes 4 independently.

The beneficial effect of adopting above-mentioned technical scheme is: the number of the propelling units is set to be not less than that of the syringes, which is helpful for ensuring that each syringe is provided with propelling power by the independent propelling unit, is convenient for realizing the purpose that all syringes are propelled simultaneously or one syringe is propelled independently, and the control of the syringes is more flexible.

In other embodiments of the present invention, as shown in fig. 2, the propulsion unit 51 is a peristaltic pump 511.

The beneficial effect of adopting above-mentioned technical scheme is: the peristaltic pump is used as a propulsion unit, the advantages of good stability, high precision, no pollution, good sealing performance and simplicity in maintenance of the peristaltic pump are fully utilized, particularly for the high-precision requirement of preparation of electrostatic spinning on flow control of spinning solution, the advantages of the peristaltic pump are more obvious, and the propulsion speed of the propulsion device using the peristaltic pump as the propulsion unit can be adjusted within the range of (0.001-1) mL/min.

In other embodiments of the present invention, as shown in fig. 1, the airflow assisting device 6 further includes an airflow adjusting element 63, a gas pressure gauge 64 and an oil-gas separating device 65, the airflow adjusting element 63 is disposed in cooperation with the airflow cover 62, and the airflow adjusting element 63 is used for controlling and adjusting the airflow rate of the airflow cover 62; the gas pressure gauge 64 is used for measuring the gas pressure in the ventilation pipeline 61 in real time; the oil-gas separation device 65 is used for separating and removing micro oil drops in the compressed air, so that pure compressed air is provided for the preparation of electrostatic spinning.

The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the airflow adjusting element is convenient for adjusting the airflow at each spinning needle head.

In other embodiments of the present invention, as shown in fig. 1, the electrospinning production apparatus further includes a vertical lifting platform 8, the vertical lifting platform 8 includes a lifting element 81 and a carrying platform 82, the carrying platform 82 is used for fixing and carrying the propelling device 5 and the injector 4, and the lifting element 81 provides a driving force for the carrying platform 82 to lift in a vertical direction.

The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the vertical lifting platform facilitates the lifting of the propelling device and the injector, so that the distance between the injector and the receiving plate can be adjusted to meet the requirements of different spinning solutions on the distance between the spinning needle head and the receiving plate.

In other embodiments of the present invention, as shown in fig. 1, the electrospinning production apparatus further comprises an air exhaust device 9, and the air exhaust device 9 is disposed outside the spinning machine housing 1 to exhaust the excessive air in the spinning machine housing 1 in time, so as to prevent the excessive air pressure in the spinning machine housing 1 from affecting the drawing of the spun yarn.

In other embodiments of the present invention, the present invention further discloses a process for preparing electrostatic spinning, comprising the following steps:

s1, preparing a spinning solution, wherein the spinning solution comprises a solute and a solvent, and the mass of the solute accounts for 8% -50% of that of the spinning solution;

s2, checking the electrostatic spinning preparation equipment to ensure that the components for supplying power and air work normally;

s3, switching on a main power supply and a ventilation pipeline, and setting parameters of a high-voltage power supply and parameters of a spinning process;

s4, controlling the vertical lifting platform, and adjusting the distance between a liquid outlet of the spinning needle head and a receiving plate of the spinning receiving device;

s5, adjusting the position of the propulsion unit, installing an airflow auxiliary device and an injector, filling spinning solution, and setting the propulsion speed of the propulsion unit;

s6, closing a box door of the spinning machine, and checking a high-voltage power supply;

s7, switching on a high-voltage power supply, starting a spinning switch, enabling the propulsion unit to run at a low speed, and enabling the yarn collecting barrel to rotate to start spinning;

and S8, ending spinning, turning off the high-voltage power supply, and then turning on a box door of the spinning machine.

The beneficial effect of adopting above-mentioned technical scheme is: by manufacturing the electrostatic spinning through the preparation process, the preparation efficiency is high, the electrostatic spinning quality is stable, the operation is standard, the unnecessary work-wasting phenomenon is reduced, and the safety risk is effectively reduced.

In other embodiments of the present invention, the solute in the step S1 accounts for 8% to 10% of the mass of the spinning solution.

The beneficial effect of adopting above-mentioned technical scheme is: the viscosity of the spinning solution is most suitable when the ratio of the solute mass to the mass of the spinning solution is 8% to 10% regardless of whether the spinning solution is a Polyacrylonitrile (PAN) -based N, N-Dimethylformamide (DMF) spinning solution, a polyvinylpyrrolidone (PVP) -based ethanol spinning solution, or a polyvinyl alcohol (PVA) -based pure water solution.

In other embodiments of the present invention, the voltage of the high voltage power supply in step S3 ranges from 10.0kV to 15.0 kV.

The beneficial effect of adopting above-mentioned technical scheme is: no matter the spinning solution is Polyacrylonitrile (PAN) -based N, N-Dimethylformamide (DMF) spinning solution or polyvinylpyrrolidone (PVP) -based ethanol spinning solution or polyvinyl alcohol (PVA) -based pure water solution, when the voltage of a high-voltage power supply is in the range of 10.0kV to 15.0kV, the prepared electrostatic spinning filament has moderate diameter and thickness and is more stable to prepare.

In other embodiments of the present invention, the spinning process parameters in step S3 include the flow rate of the ventilation pipeline, the target value of temperature and humidity in the box of the spinning machine, the temperature of the spinning airflow, the rotation speed of the spinning winding tube and the liquid outlet flow rate of the single spinning needle.

The beneficial effect of adopting above-mentioned technical scheme is: through the setting of the flow of the ventilation pipeline, the liquid outlet flow of the spinning needle head, the temperature, the humidity and the air flow temperature in the box body of the spinning machine, corresponding parameters can be adjusted conveniently, so that the preparation requirements of different spinning fibers can be met by adapting to the characteristics of different spinning solutions.

In other embodiments of the present invention, the outflow rate of the single spinning needle is in the range of 0.02ml/h to 0.08 ml/h.

The beneficial effect of adopting above-mentioned technical scheme is: no matter the spinning solution is Polyacrylonitrile (PAN) -based N, N-Dimethylformamide (DMF) spinning solution or polyvinylpyrrolidone (PVP) -based ethanol spinning solution or polyvinyl alcohol (PVA) -based pure water solution, when the liquid outlet flow of a single spinning needle head is in the range of 0.02 ml/h-0.08 ml/h, the prepared electrostatic spinning filament has moderate diameter and thickness, and the electrostatic spinning preparation is more efficient and stable.

In other embodiments of the invention, the spinning is polyvinylpyrrolidone fiber, and the solute and solvent of the spinning solution are polyvinylpyrrolidone and ethanol, respectively; the mass of the polyvinylpyrrolidone powder accounts for 8% of the mass of the spinning solution; the voltage of the high-voltage power supply was set to 10.0kV in the S3 step; in the step S3, the liquid outlet flow of a single spinning needle head is set to be 0.08 ml/h; the distance between the liquid outlet end of the spinning needle and the receiving plate in the step S4 is 18 cm.

In other embodiments of the present invention, the spun fibers are polyvinyl alcohol fibers, and the solute and the solvent of the spinning solution are polyvinyl alcohol and pure water, respectively; the mass of polyacrylonitrile accounts for 9 percent of the mass of the spinning solution; the voltage of the high-voltage power supply was set to 11.0kV in the S3 step; in the step S3, the liquid outlet flow of a single spinning needle head is set to be 0.02 ml/h; the distance between the liquid outlet end of the spinning needle and the receiving plate in the step S4 is 25 cm.

In other embodiments of the invention, the spun fiber is polyacrylonitrile fiber, and the solute and solvent of the spinning solution are polyacrylonitrile and N, N-dimethylformamide, respectively; the mass of polyacrylonitrile accounts for 10 percent of the mass of the spinning solution; the voltage of the high-voltage power supply was set to 15.0kV in the S3 step; in the step S3, the liquid outlet flow of a single spinning needle is set to be 0.05 ml/h; in the step S4, the distance between the liquid outlet end of the spinning needle head and the receiving plate is 15cm, the diameter of the finally drawn spinning is 20-500 nm, and the yarn outlet solution is 10-3400 mu l/min.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.