Ion source induced nanofiber and preparation device and method

Abstract

The invention discloses an ion source induced nanofiber and a preparation device and method, and the device comprises a nanofiber collector, and a gas ionization generator, a unipolar ion beam extractor, a unipolar ion beam injector, a unipolar ion beam liquid phase mixer and a liquid phase capillary ejector which are sequentially communicated from top to bottom, the discharging end of the liquid-phase capillary ejector is provided with a capillary ejection opening, the nanofiber collector is provided with a receiving face and an ion beam receiving conductor electrically connected with the receiving face, the receiving face is correspondingly arranged below the capillary ejection opening, and a gap is formed between the receiving face and the capillary ejection opening. And the ion beam receiving conductor is correspondingly arranged below a negative polarity ion beam outlet of the unipolar ion beam extractor. According to the invention, stable and continuous spray deposition of nanofibers on any surface can be realized, and high-quality and high-yield manufacturing of nanofiber materials can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of a device for preparing a new nanofiber textile material, and in particular relates to an ion source induced nanofiber and a preparation device and method. Background Art

[0002] Nanofiber materials have a large specific surface area, aspect ratio, radius of curvature, strong mutual penetration with other substances, fine nanofiber fabric structure, high porosity, excellent flexibility, adsorption, filtration, adhesion, and thermal insulation. The unique properties of nanofiber materials make them have huge market potential in the fields of membrane materials, filter media, catalysts, electronic products, biological products, composite reinforcement materials, electrochemical diaphragms, etc.

[0003] Currently, the stable batch preparation of nanofiber materials is still one of the difficulties in this field.

[0004] Electrospinning is a currently more effective method for mass production of nanofiber materials. Electrospinning is a special fiber manufacturing process in which polymer melts or solutions are jet-spun in a strong electric field. Traditional electrospinning is a method of using a high-voltage electrostatic generator to make ultrafine fibers from polymer melts or solutions. Traditional electrospinning devices use ordinary capillary needles for spinning. The metal needle is connected to a high-voltage electrostatic generator, and the metal collector is grounded to form a high-voltage electrostatic field. Under the action of the electric field, the droplet at the needle will change from a sphere to a cone (i.e., a "Taylor cone"), and extend and split from the tip of the cone to obtain nanofiber filaments. This method can mass-produce polymer filaments with nanometer diameters and form bulk or thin film materials.

[0005] However, traditional electrospinning technology is severely constrained by problems such as low productivity, high cost of high-voltage equipment, and poor stability. Among them, poor product stability is one of the most serious problems. The main influencing factors are as follows: (1) The high-voltage power supply is unstable during operation; (2) A high-voltage electric field is formed between the metal capillary and the metal collector, and the polymer melt or solution cannot form a good electrical contact with the metal capillary, resulting in instability of the fiber jet in the electric field; (3) The traditional metal capillary acts as a high-voltage electrode to generate electric field shielding for the front end of the jet, and is easily disturbed by the surrounding structure and environmental conditions, resulting in unstable spinning. Summary of the invention

[0006] In view of the problems existing in the above-mentioned prior art, the present invention provides an ion source induced nanofiber and a preparation device and method, the purpose of which is to eliminate the dependence of traditional electrospinning on high-voltage power supply, while eliminating the voltage drop, high-voltage power loss and unstable fiber jet caused by poor electrical contact between the polymer melt or solution and the high-voltage electrode, and further eliminate the unstable electric field distribution and unstable spinning caused by traditional metal nozzles, thereby realizing stable and efficient nanofiber preparation with compact structure and easy operation.

[0007] In order to achieve the above object, the specific scheme of the present invention is as follows:

[0008] An ion source induced nanofiber preparation device comprises a nanofiber collector and a gas ionization generator, a monopolar ion beam extractor, a monopolar ion beam injector, a monopolar ion beam liquid phase mixer and a liquid phase capillary injector which are sequentially connected from top to bottom, wherein a capillary injection port is provided at the discharge end of the liquid phase capillary injector, the nanofiber collector is provided with a receiving surface and an ion beam receiving conductor which is conductively connected to the receiving surface, the receiving surface is correspondingly arranged below the capillary injection port, and a spacing is arranged between the receiving surface and the capillary injection port, and the ion beam receiving conductor is correspondingly arranged below the negative polarity ion beam outlet of the monopolar ion beam extractor;

[0009] The gas introduced into the gas ionization generator is ionized to generate plasma gas, which is then input into a monopolar ion beam extractor; the monopolar ion beam extractor separates the positive polarity ions and negative polarity ions in the plasma gas to form a positive polarity ion beam and a negative polarity ion beam respectively, and the negative polarity ion beam is guided to the ion beam receiving conductor of the nanofiber receiver so that the receiving surface of the nanofiber collector is charged with negative polarity, and the positive polarity ion beam is introduced into a monopolar ion beam injector, and the monopolar ion beam injector accelerates the positive polarity ion beam and then introduces it into a monopolar ion beam liquid phase mixer, and a polymer fluid is introduced into the feed end of the monopolar ion beam liquid phase mixer to mix with the positive polarity ions to form a positively charged polymer fluid, which is then introduced into a liquid phase capillary injector, and the liquid phase capillary injector injects the positively charged polymer fluid onto the receiving surface of the nanofiber collector with negative polarity charge, and during the injection process, the polymer fiber jet is generated by the attraction of the positive and negative polarity charges.

[0010] Furthermore, the inner diameter of the capillary injection port is set to 0.5-3 mm; the spacing is 100-300 mm; and the receiving surface is any one of a plane type, a roller type, a shaft core type or a conveyor belt type.

[0011] A unipolar ion beam liquid phase mixer as described in the device comprises a mixer shell, a stirring rod driver, a coupling and a propulsion type mixing stirring rod. The top of the mixer shell is provided with a mixer ion beam injection port and a polymer fluid inlet. The mixer ion beam injection port is connected to the ion beam outlet of the unipolar ion beam injector. One side of the mixer shell is provided with a positively charged polymer fluid outlet connected to the positively charged polymer fluid inlet of a liquid phase capillary injector. The other side of the mixer shell is provided with an axial hole. One end of the propulsion type mixing stirring rod is provided with a spiral stirring blade and is arranged in the mixer shell. The other end of the propulsion type mixing stirring rod passes through the axial hole to be connected to the coupling, and the stirring rod driver is connected to the coupling.

[0012] A method for preparing nanofibers by inducing an ion source using the device comprises the following steps:

[0013] Step 1, the gas is ionized by a gas ionization generator to generate plasma gas;

[0014] Step 2, the plasma gas passes through a unipolar ion beam extractor to form a positive polarity ion beam and a negative polarity ion beam;

[0015] Step 3, passing the positive polarity ion beam through a monopolar ion beam injector to form a high-flow positive polarity ion beam; mixing the polymer fluid in the form of a melt or a solution with the high-flow positive polarity ion beam in a monopolar ion beam liquid phase mixer to form a positively charged polymer fluid for discharge;

[0016] Step 4, the ion beam receiving conductor of the nanofiber collector receives the negative polarity ion beam described in step 2, and a high voltage electric field is formed between the receiving surface of the nanofiber collector and the positively charged polymer fluid ejected through the capillary ejection port of the liquid phase capillary ejector, and under the action of the high voltage electric field, the positively charged polymer fluid ejected through the capillary ejection port of the liquid phase capillary ejector forms a polymer fiber jet;

[0017] Step 5: The polymer fiber jet is further stretched and accelerated under the action of a high voltage electric field to form a stable high-speed nanofiber jet that is sprayed and deposited on a receiving surface of a nanofiber collector to obtain a polymer nanofiber material.

[0018] Furthermore, the gas in step 1 includes any one of argon, helium, air or a combination thereof, and the flow rate of the gas is controlled at 2 to 100 L / min. The gas is argon, and the purity of the argon is at least 99.99%, or the gas is helium, and the purity of the helium is at least 99.99%.

[0019] Furthermore, the flow rate of the positive polarity ion beam in step 2 is set to 1.5-50 L / min, and the flow rate of the negative polarity ion beam is set to 1-20 L / min.

[0020] Furthermore, the polymer liquid in step 3 is a polyvinylidene fluoride solution, a polylactic acid solution or a polyvinylidene fluoride melt, and the flow rate of the polymer fluid is set to 2-100 ml / min; the flow rate of the positively charged polymer fluid discharged is set to 2-80 ml / min.

[0021] Furthermore, the flow rate of the capillary injection port of the liquid phase capillary injector in step 4 is set to 1.5-60 ml / min.

[0022] Furthermore, the preparation rate of the polymer nanofiber material described in step 5 is 0.3 to 60 g / min.

[0023] A polymer nanofiber material prepared by the method described above is a nanofiber bulk phase or film material.

[0024] Advantages of the present invention

[0025] The ion source induced nanofiber preparation device and method of the present invention can eliminate the dependence of the traditional electrospinning method on high-voltage power supply for preparing nanofiber materials, thereby eliminating the influence of the instability of the high-voltage power supply on the stability of the spinning jet; it can abandon the method in which the high-voltage electric field is formed between the metal capillary and the metal receiver in the traditional electrospinning method, and creatively improve it to form the high-voltage electric field directly between the spinning jet and the receiver, thereby eliminating the voltage drop, high-voltage electric power loss and unstable spinning jet caused by the poor electrical contact between the polymer fluid and the high-voltage electrode; it can also eliminate the electric field shielding generated by the traditional metal capillary as a high-voltage electrode on the front end of the jet, eliminating the unstable electric field distribution and the interference of the surrounding structure and environmental conditions on the jet. The device and method of the present invention more effectively utilize the high-voltage electric field driving force, and the polymer fiber jet is more effectively stretched to form a stable high-speed nanofiber jet, realizing the stable, efficient and high-quality preparation of nanofiber materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the ion source induced nanofiber preparation device of the present invention.

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the monopolar ion beam liquid phase mixer.

[0028] Figure 3 for Figure 1 Schematic diagram of the apparatus for forming a polymer nanofiber jet from a polymer fluid.

[0029] Figure 4 for Figure 1 Schematic diagram of the device for preparing polymer nanofiber materials.

[0030] In the figure:

[0031] 1. Gas ionization generator; 101. Gas inlet; 102. Plasma gas outlet; 2. Monopolar ion beam extractor; 201. Plasma gas inlet; 202. Negative polarity ion beam outlet; 203. Positive polarity ion beam outlet; 3. Monopolar ion beam injector; 301. Injector ion beam inlet; 302. Injector ion beam outlet; 4. Monopolar ion beam liquid phase mixer; 401. Mixer ion beam injection port; 402. Polymer fluid inlet; 403. Positively charged polymer fluid outlet; 404. Mixer housing; 405, propulsion type mixing stirring rod; 406, stirring rod driver; 407, coupling; 408, spiral stirring blade; 5, liquid phase capillary ejector; 501, positively charged polymer fluid inlet; 502, capillary ejector port; 6, nanofiber collector; 601, receiving surface; 602, ion beam receiving conductor; 7, gas; 701, plasma gas; 702, positive polarity ion beam; 703, negative polarity ion beam; 8, polymer fluid; 801, positively charged polymer fluid; 802, polymer fiber jet; 9, polymer nanofiber material. DETAILED DESCRIPTION

[0032] Example 1

[0033] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the specific embodiments are not intended to limit the scope of rights of the present invention.

[0034] like Figures 1 to 3 As shown, an ion source induced nanofiber preparation device provided in this embodiment 1 includes a nanofiber collector 6 and a gas ionization generator 1, a monopolar ion beam extractor 2, a monopolar ion beam injector 3, a monopolar ion beam liquid phase mixer 4 and a liquid phase capillary injector 5 which are connected in sequence from top to bottom.

[0035] The model of the gas ionization generator 1 is JH-SMALL, and the commercially available brand is Sawai Electronics; the model of the unipolar ion beam extractor 2 is 6530QTOF, and the commercially available brand is Agilent; the model of the unipolar ion beam injector 3 is ECRIS, and the commercially available brand is AXCELIS; the liquid phase capillary injector 5 is a commercially available brand of Huizhi.

[0036] The gas inlet 101 of the gas ionization generator 1 is used to receive the gas for forming plasma gas, which includes any one of argon, helium, and air or a combination thereof, and is required to be a high-purity gas, wherein the purity of the argon is at least 99.99%, and the purity of the helium is at least 99.99%.

[0037] The plasma gas outlet 102 of the gas ionization generator 1 is connected to the plasma gas inlet 201 of the unipolar ion beam extractor 2, the positive polarity ion beam outlet 203 of the unipolar ion beam extractor 2 is connected to the ion beam inlet 301 of the unipolar ion beam injector 3, and the ion beam output port 302 of the unipolar ion beam injector 3 is connected to the unipolar ion beam liquid phase mixer 4. Specifically, the monopolar ion beam liquid phase mixer 4 includes a mixer shell 404, a stirring rod driver 406, a coupling 407 and a propulsion type mixing stirring rod 405. The mixer shell is a cylindrical structure with a cavity therein. A mixer ion beam injection port 401 and a polymer fluid inlet 402 are provided on the top of the mixer shell 404. The mixer ion beam injection port 401 is connected to the ion beam outlet 302 of the monopolar ion beam injector 3. A positively charged polymer material outlet 403 is provided on one side of the mixer shell 404 and is connected to the positively charged polymer material inlet 501 of the liquid phase capillary injector 5. An axial hole is provided on the other side of the mixer shell 404. A spiral stirring blade 408 is provided at one end of the propulsion type mixing stirring rod 405 and is arranged in the mixer shell 404. The other end of the propulsion type mixing stirring rod 405 passes through the axial hole to connect to the coupling 407, and the stirring rod driver 406 is connected to the coupling 407. The stirring rod driver 406 may be a commercially available reduction motor, servo motor, or pneumatic motor; the coupling 407 is made of insulating material and connects the stirring rod driver 406 and the propulsion type mixing stirring rod 405 .

[0038] The inner diameter of the capillary injection port 502 is set to 0.5-3 mm; the receiving surface 601 of the nanofiber collector 6 is correspondingly arranged below the capillary injection port 502 of the liquid phase capillary injector 5, and the nanofiber collector 6 includes any one of a plane type, a drum type, a shaft core type or a conveyor belt type. The ion beam receiving conductor 602 of the nanofiber collector 6 is correspondingly arranged below the negative polarity ion beam outlet 202 of the unipolar ion beam extractor 2, and a distance of 100-300 mm is set between the receiving surface 601 of the nanofiber collector 6 and the capillary injection port 502.

[0039] Working principle:

[0040] like Figure 3As shown, when in use, the gas 7 is introduced into the gas ionization generator 1 to ionize and generate the plasma gas 701, and then input into the monopolar ion beam extractor 2; the monopolar ion beam extractor 2 separates the positive polarity ions and negative polarity ions in the plasma gas 701 to form a positive polarity ion beam and a negative polarity ion beam, respectively, and the negative polarity ion beam is led out to the ion beam receiving conductor 602 of the nanofiber receiver 6, so that the receiving surface 601 of the nanofiber collector 6 carries a negative polarity charge, and the positive polarity ion beam is introduced into the monopolar ion beam injector 3, and the monopolar The positive polarity ion beam is accelerated by the ion beam injector 3 and then passed into the monopolar ion beam liquid phase mixer 4. The polymer fluid 8 is introduced into the feed end of the monopolar ion beam liquid phase mixer 4 to mix with the positive polarity ions to form a positively charged polymer fluid 801 and passed into the liquid phase capillary injector 5. The liquid phase capillary injector 5 injects the positively charged polymer fluid 801 onto the receiving surface 601 of the negatively charged nanofiber collector 6. During the injection process, the polymer fiber jet 802 is generated by the attraction of the positive and negative charges.

[0041] Example 2

[0042] The ion source induced nanofiber preparation device of Example 1 is used to prepare a polyvinylidene fluoride nanofiber film material. The method for preparing the polyvinylidene fluoride nanofiber film material comprises the following steps:

[0043] Step 1, high-purity argon gas with a gas flow rate of 50 L / min and a purity of 99.999% is introduced into a gas ionization generator 1 to form plasma gas;

[0044] Step 2, the plasma gas described in step 1 passes through a unipolar ion beam extractor to simultaneously form a positive polarity ion beam and a negative polarity ion beam, and the flow rates of the positive polarity ion beam and the negative polarity ion beam are 30 L / min and 10 L / min, respectively;

[0045] Step 3, passing the positive polarity ion beam through the monopolar ion beam injector 3 to form a high-flow positive polarity ion beam; the polymer fluid in this embodiment is an N-methylpyrrolidone solution of polyvinylidene fluoride with a mass concentration of 20%, and the N-methylpyrrolidone solution of polyvinylidene fluoride with a mass concentration of 20% is injected into the monopolar ion beam liquid phase mixer 4 at a flow rate of 3ml / min. At the same time, the high-flow positive polarity ion beam is injected into the monopolar ion beam liquid phase mixer 4, and the built-in propulsion mixing and stirring device of the monopolar ion beam liquid phase mixer 4 is used to achieve the mixing of the high-flow positive polarity ion beam and the N-methylpyrrolidone solution of polyvinylidene fluoride with a mass concentration of 20% to form a positively charged polymer solution and discharge it, with a discharge flow rate of 2ml / min.

[0046] Step 4, select a liquid-phase capillary injector 5 with an inner diameter of 1.3 mm for the capillary nozzle 502, and inject the positively charged polymer solution of step 3 at a flow rate of 1.5 ml / min, and use a planar nanofiber receiver 6, which is a commercially available mirror-finished 304 stainless steel plate with specifications of 300 mm in length, 200 mm in width, and 2 mm in thickness. The receiving surface 601 of the planar nanofiber collector 6 is placed opposite to the capillary nozzle 502 of the liquid-phase capillary injector 5 and maintained at a distance of 300 mm. The ion beam receiving conductor 602 of the flat-plate nanofiber collector 6 is used to receive the negative polarity ion beam described in step 2, and a high-voltage electric field is formed between the positively charged polymer solution and the receiving surface 601 of the flat-plate nanofiber collector 6; the above-mentioned polymer fiber jet is formed under the action of the high-voltage electric field.

[0047] Step 5, under the action of the high voltage electric field, the polymer fiber jet is further stretched and accelerated to form a stable and high-speed polymer nanofiber jet that is sprayed and deposited on the receiving surface 601 of the nanofiber collector 6 to obtain a circular polyvinylidene fluoride nanofiber film, such as Figure 4 The diameter of the polyvinylidene fluoride nanofiber circular film is 90 mm, the film thickness is 40 μm, the nanofiber wire diameter is 120-180 nm, and the preparation rate is 0.3 g / min.

[0048] The polymer nanofiber material prepared by the method of the above-mentioned embodiment 2 is a polyvinylidene fluoride nanofiber circular film material.

[0049] Example 3

[0050] The polylactic acid nanofiber tubular material is prepared using the ion source induced nanofiber preparation device of Example 1. The method for preparing the polylactic acid nanofiber tubular material includes the following steps:

[0051] Step 1, high-purity helium gas with a gas flow rate of 2 L / min and a purity of 99.999% is introduced into a gas ionization generator 1 to form plasma gas;

[0052] Step 2, the plasma gas described in step 1 passes through a unipolar ion beam extractor to simultaneously form a positive polarity ion beam and a negative polarity ion beam, and the flow rates of the positive polarity ion beam and the negative polarity ion beam are 1.5 L / min and 1.5 L / min respectively;

[0053] Step 3, passing the positive polarity ion beam through the monopolar ion beam injector 3 to form a high-flow positive polarity ion beam; the polymer material of this embodiment is an ethyl acetate solution of polylactic acid with a mass concentration of 20%, and the ethyl acetate solution of polylactic acid with a mass concentration of 20% is injected into the monopolar ion beam liquid phase mixer 4 at a flow rate of 10 ml / min. At the same time, the high-flow positive polarity ion beam is injected into the monopolar ion beam liquid phase mixer 4, and the built-in propulsion mixing and stirring device of the monopolar ion beam liquid phase mixer 4 is used to achieve the mixing of the high-flow positive polarity ion beam and the ethyl acetate solution of polylactic acid with a mass concentration of 20% to form a positively charged polymer solution and discharge it, and the discharge flow rate is 10 ml / min.

[0054] Step 4, using a liquid capillary injector with an inner diameter of 0.5mm of the capillary nozzle to spray the above-mentioned positively charged polymer solution at a flow rate of 10ml / min, using a commercially available axial core nanofiber collector of the brand Yongkang Leye, with specifications of a receiving axial core diameter of 3mm and an axial core length of 200mm, the receiving surface 601 of the axial core nanofiber collector 6 is placed opposite to the capillary injection port 502 of the liquid capillary injector 5, and a distance of 100mm is maintained, and the ion beam receiving conductor 602 of the axial core nanofiber collector is used to receive the negative polarity ion beam described in step 2, and a high-voltage electric field is formed between the positively charged polymer solution and the receiving surface 601 of the axial core nanofiber collector 6; the above-mentioned polymer fiber jet is formed under the action of the high-voltage electric field.

[0055] Step 5, under the action of the high voltage electric field, the polymer fiber jet is further stretched and accelerated to form a stable and high-speed polymer nanofiber jet, which is sprayed and deposited on the receiving surface 601 of the nanofiber collector 6 to obtain a polylactic acid nanofiber tubular phase material with a tube wall thickness of 40 μm, an inner diameter of 3 mm, a tube length of 200 mm, a fiber line diameter of 100 to 120 nm, and a preparation rate of 2 g / min.

[0056] The polymer nanofiber material prepared by the method of the above-mentioned embodiment 3 is a polylactic acid nanofiber tubular bulk phase material.

[0057] Example 4

[0058] The polyethylene nanofiber film material is prepared using the ion source induced nanofiber preparation device of Example 1. The method for preparing the polyethylene nanofiber film material includes the following steps:

[0059] Step 1, passing air with a gas flow rate of 100 L / min into a gas ionization generator 1 to form plasma gas;

[0060] Step 2, the plasma gas described in step 1 passes through a unipolar ion beam extractor to simultaneously form a positive polarity ion beam and a negative polarity ion beam, and the flow rates of the positive polarity ion beam and the negative polarity ion beam are 40 L / min and 20 L / min, respectively;

[0061] Step 3, passing the positive polarity ion beam through the monopolar ion beam injector 3 to form a high-flow positive polarity ion beam; the polymer material in this embodiment is polyethylene melt, and the polyethylene melt is injected into the monopolar ion beam liquid phase mixer 4 at a flow rate of 100 ml / min. At the same time, the high-flow positive polarity ion beam is injected into the monopolar ion beam liquid phase mixer 4, and the built-in propulsion mixing and stirring device of the monopolar ion beam liquid phase mixer 4 is used to achieve mixing of the high-flow positive polarity ion beam and the polyethylene melt to form a positively charged polymer melt and discharge it, with a discharge flow rate of 80 ml / min.

[0062] Step 4, using a liquid-phase capillary injector with an inner diameter of 3mm of the capillary nozzle to inject the above-mentioned positively charged polymer melt at a flow rate of 60ml / min, using a commercially available brand of Bergso, model 4032-T2 conveyor belt type nanofiber collector 6, with specifications of a conveyor belt receiving surface of 300mm long and 200mm wide, and its receiving surface 601 is placed opposite to the capillary nozzle of the liquid-phase capillary injector 5 and maintained at a distance of 200mm, and the ion beam receiving conductor 602 of the conveyor belt type nanofiber collector 6 is used to receive the negative polarity ion beam described in step 2, and a high-voltage electric field is formed between the positively charged polymer melt and the receiving surface 601 of the conveyor belt type nanofiber collector 6; the above-mentioned polymer fiber jet is formed under the action of the high-voltage electric field.

[0063] Step 5, under the action of the high voltage electric field, the polymer fiber jet is further stretched and accelerated to form a stable and high-speed polymer nanofiber jet, which is sprayed and deposited on the receiving surface 601 of the nanofiber collector 6 to obtain a polyethylene nanofiber strip film material with a film width of 90 mm, a film thickness of 60 μm, a fiber diameter of 250 to 300 nm, and a preparation rate of 54 g / min.

[0064] The polymer nanofiber material prepared by the method of the above-mentioned embodiment 4 is a polyethylene nanofiber strip film material.

Claims

1. An ion source induced nanofiber preparation device, characterized in that: The invention comprises a nanofiber collector and a gas ionization generator, a monopolar ion beam extractor, a monopolar ion beam injector, a monopolar ion beam liquid phase mixer and a liquid phase capillary injector which are connected in sequence from top to bottom. The discharge end of the liquid phase capillary injector is provided with a capillary injection port. The nanofiber collector is provided with a receiving surface and an ion beam receiving conductor which is conductively connected to the receiving surface. The receiving surface is correspondingly arranged below the capillary injection port, and a distance is arranged between the receiving surface and the capillary injection port. The ion beam receiving conductor is correspondingly arranged below the negative polarity ion beam outlet of the monopolar ion beam extractor.

2. The device according to claim 1, characterized in that: The inner diameter of the capillary injection port is set to 0.5-3 mm; the spacing is 100-300 mm; the receiving surface is any one of a plane type, a roller type, a shaft core type or a conveyor belt type.

3. A unipolar ion beam liquid phase mixer as claimed in claim 1, characterized in that: The invention comprises a mixer shell, a stirring rod driver, a coupling and a propulsion type mixing stirring rod. The top of the mixer shell is provided with a mixer ion beam injection port and a polymer fluid inlet port. The mixer ion beam injection port is connected to the ion beam outlet of a monopolar ion beam injector. One side of the mixer shell is provided with a positively charged polymer fluid outlet connected to the positively charged polymer fluid inlet of a liquid phase capillary injector. The other side of the mixer shell is provided with an axial hole. One end of the propulsion type mixing stirring rod is provided with a spiral stirring blade which is arranged in the mixer shell. The other end of the propulsion type mixing stirring rod passes through the axial hole to be connected to the coupling. The stirring rod driver is connected to the coupling.

4. A method for preparing ion source induced nanofibers using the device according to claim 1, characterized in that: The steps include: Step 1, the gas is ionized by a gas ionization generator to generate plasma gas; Step 2, the plasma gas passes through a unipolar ion beam extractor to form a positive polarity ion beam and a negative polarity ion beam; Step 3, passing the positive polarity ion beam through a monopolar ion beam injector to form a high-flow positive polarity ion beam; mixing the polymer fluid in the form of a melt or a solution with the high-flow positive polarity ion beam in a monopolar ion beam liquid phase mixer to form a positively charged polymer fluid for discharge; Step 4, the ion beam receiving conductor of the nanofiber collector receives the negative polarity ion beam described in step 2, a high voltage electric field is formed between the receiving surface of the nanofiber collector and the positively charged polymer fluid ejected through the capillary ejection port, and under the action of the high voltage electric field, the positively charged polymer fluid ejected through the capillary ejection port forms a polymer fiber jet; Step 5: The polymer fiber jet is further stretched and accelerated under the action of the high voltage electric field to form a stable high-speed polymer nanofiber jet that is sprayed and deposited on the receiving surface of the nanofiber collector to obtain a polymer nanofiber material.

5. The method according to claim 4, characterized in that: In step 1, the gas includes any one of argon, helium, and air, or a combination thereof, and the flow rate of the gas is controlled at 2 to 100 L / min. The gas is argon, and the purity of the argon is at least 99.99%, or the gas is helium, and the purity of the helium is at least 99.99%.

6. The method according to claim 4, characterized in that: The flow rate of the positive polarity ion beam described in step 2 is set to 1.5-50 L / min, and the flow rate of the negative polarity ion beam is set to 1-20 L / min.

7. The method according to claim 4, characterized in that: The polymer fluid described in step 3 is polyvinylidene fluoride solution, polylactic acid solution or polyvinylidene fluoride melt, and the flow rate of the polymer fluid is set to 2-100 ml / min; the flow rate of the positively charged polymer fluid discharged is set to 2-80 L / min.

8. The method according to claim 4, characterized in that: The flow rate of the capillary injection port in step 4 is set to 1.5-60 ml / min.

9. The method according to claim 4, characterized in that: The preparation rate of the polymer nanofiber material described in step 5 is 0.3-60 g / min.

10. A polymer nanofiber material prepared by the method according to any one of claims 4 to 9, wherein the polymer nanofiber material is a nanofiber bulk phase or a film material.

Images