WO2019124663A1 - Dispositif de fusion-électrofilage pour la production en masse de nanofibres, et procédé de fusion-électrofilage sans solvant - Google Patents

Dispositif de fusion-électrofilage pour la production en masse de nanofibres, et procédé de fusion-électrofilage sans solvant Download PDF

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Publication number
WO2019124663A1
WO2019124663A1 PCT/KR2018/008324 KR2018008324W WO2019124663A1 WO 2019124663 A1 WO2019124663 A1 WO 2019124663A1 KR 2018008324 W KR2018008324 W KR 2018008324W WO 2019124663 A1 WO2019124663 A1 WO 2019124663A1
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Prior art keywords
melt
polymer
nanofiber
wire
mass production
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PCT/KR2018/008324
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English (en)
Korean (ko)
Inventor
이재창
정유진
제갈종건
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한국화학연구원
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Publication of WO2019124663A1 publication Critical patent/WO2019124663A1/fr

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0015—Electro-spinning characterised by the initial state of the material
    • D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid

Definitions

  • the present invention relates to a method of supplying a polymer thermal melt of a melt extrusion type and a spinning device to which a movable wire type nanofiber generating portion is coupled, and an electrospinning device for radiating a polymer melt to a nanofiber by an electric field, Solvent-free melt electrospinning method.
  • the polymer solution is pumped to the radiation electrode in the form of a rotary emitter, where the pump solution is pumped from the reservoir and forced through the pores of the emitter.
  • the electrostatic potential between the grid and the emitter is collected on the substrate as a layer by "spinning" the liquid into thin microfibers and providing charge. In this process, the solvent evaporates from the microfibers and reduces the fiber diameter.
  • U.S. Patent No. 7585437 B2 and WO 2006/131081 A1 Other examples of electrostatic spinning devices are disclosed in U.S. Patent No. 7585437 B2 and WO 2006/131081 A1.
  • the radiation electrode design disclosed in this application is in the form of a rotating drum-like body which can take many different forms.
  • the drum is positioned within the polymer solution reservoir and rotates about an axis perpendicular to the path of the acquisition medium. By rotating the drum through the polymer solution, the rotating surface of the charged electrode is coated with the polymer solution.
  • U.S. Patent No. 7585437 B2 and International Patent No. WO 2006/131081 A1 show various drums such as body deformations and provide several advanced techniques to create individual spinning positions where fine fibers are created.
  • the spinning process of this fiber means a process in which the polymer fluid is continuously pushed out through the fine holes and converted into long and thin fibers.
  • a hot polymer fluid flows out through a fine hole portion called a spinneret, and then is cooled and cooled down through a cooling portion, and is pulled and wound from a winding portion.
  • Representative spinning processes include melt spinning, solution spinning, and the like.
  • the melt spinning is a mode in which a polymer chip is placed in a raw material reservoir of a radiator and melted in a high-temperature extruder, the fibers are extruded through a spinneret, solidified by cold cooling air, and then stretched by a winding section.
  • Solution spinning dissolves the raw polymer in a solvent in a reservoir, passes it through a heat exchanger or the like to adjust its molecular weight or viscosity, passes it through a spinneret, and then quickly emits wet spinning through a cool coagulating liquid and hot gas, There is a dry spinning which becomes a fiber.
  • Nanofibers are produced by electrospinning.
  • Electrospinning is a polymer solution that has been modified in electrostatic spraying process in which fine filaments are released from the surface of droplets when a high voltage is applied to droplets suspended from capillary tip by surface tension. When the molten metal is given an electrostatic force, the fibers are formed.
  • methods of mixing the above-mentioned melt spinning or solution spinning instead of performing electrospinning alone in terms of spinning performance, productivity, and process product characteristics have been developed.
  • the conventional electrospinning apparatus has a problem in that there are many limitations on the raw material for the spinning, a constitution in which compressed air is sprayed through a separate nozzle is required, and the design and management of the spinning unit are troublesome.
  • An object of the present invention is to provide a method of combining a melt extruded polymer supply part and an electrospinning system and mass production of a nanofiber capable of directly extruding a polymer melt into a polymer melt without the need to dissolve the polymer in a solvent for electrospinning A melt electrospinning apparatus and a solventless melt electrospinning method.
  • Another object of the present invention is to provide a nanofiber mass production molten electrospinning apparatus and a solventless molten electrospinning method using the principle that the surface of the wire type nanofiber generating unit is brought into contact with the transferred polymer melt and electrospun by an electric field applied to the wire, .
  • the present invention provides a molten electrospinning apparatus for mass-producing nanofibers by melting a solvent-free polymer, the apparatus comprising: And a plurality of individual cylinders in which a plurality of individual cylinders including the screw are assembled, and a plurality of heating units for heating the plurality of individual cylinders, A molten extruded polymer supply unit provided with a temperature controller; A connector connected to the molten extruded polymer supply part and having a heating part and a temperature controller; A spinning chamber including a heating unit and a temperature sensor unit, the spinning unit including a spinning nozzle and a temperature controller, the spinning nozzle being connected to the connector by a plurality of feeding nozzles and having an open upper part; A plurality of wire type nanofiber generators provided in the spinning chamber; A collector disposed in the spinning chamber and spaced apart from the plurality of wire-type nanofiber generators; And a power supply controller for supplying power between the wire type nanofiber generator and the collector,
  • the driving motor the rotating shaft provided in the driving motor, the rotating cam rotating together with the rotating shaft, the rotating shaft fixing the rotating shaft and the rotating cam, the chain connected to the rotating cam, A driving shaft connected to the driving cam, and a driving shaft connecting the driving cam and the driving shaft.
  • the drive shaft of the output driver may be gear-coupled with the plurality of wire-type nanofiber generators to allow the plurality of wire-type nanofiber generators to move up and down at an intersection.
  • the output driving unit may be installed inside or outside the spinning block, and the plurality of wire type nanofiber generation units may be a hydraulic cylinder for electronically controlling the speed and height of the crossing at the same time.
  • the wire-type nanofiber generator may be formed of a twisted wire, and a protrusion may be formed on the surface of the wire-type nanofiber generator to widen an area contacting the polymer melt.
  • the polymer melt may be a polymer melt that is melt-extruded without being dissolved in a solvent to change polymer properties such as melt index, molecular weight, and viscosity.
  • the polymer melt may be selected from the group consisting of ABS (Acrylonitrile-Butadiene-Syrene), polycarbonate, polyethylene, polyesters (PE), polyimide (PI), polypropylene Polystyrene (PS), Polysulfone (PSF), Polyvinyl Chloride (PVC), Polyether Imide (PEI), Polyethylene terephthalate (PET), Thermoplastic Polyester Elastomer (TPE), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycyclohexylene terephthalate (PCT), polyethylene oxide (PEO), polyethylene terephthalate ), Polyvinylidene fluoride (PVDF), polylactic acid (P) LA, polylactic acid (PLLA), polyethylene terephthalate (PET), polyacrylonitrile (PAN), polyvinyl alcohol (PVA), polyurethane Polyurethane, PU) or a mixture of two or more thereof.
  • ABS
  • the heating unit and the temperature controller can be controlled to a temperature for maintaining the molten state according to the characteristics of the polymer melt.
  • the spinning chamber may further include an air circulation unit including an air intake and discharge outlet for uniformly controlling the temperature inside, and a motorized height adjuster for adjusting the distance between the wire type nano fiber generator and the collector .
  • a solvent-free melt electrospinning method using a nanofiber mass-production melt electrospinning device comprising the steps of: (a) melting a polymer chip in a melt extrusion polymer supply part ; (b) the polymer melt is transferred to the polymer melt of the spinning block through the connector and the transfer nozzle; (c) immersing a plurality of wire-type nanofiber generating units in the polymer melt of the polymer melt in the radiation block; (d) the plurality of wire-type nanofibers generated in the polymer melt are vertically moved in an intersecting manner to form an electric field between the plurality of wire-type nanofiber generators and the collector; (e) electrospinning the polymer melt from the wire-type nanofiber generator to the collector; And (f) collecting and transporting the nanofiber fiber body in the collector by a transporting unit; As shown in FIG.
  • the step (a) of melting the polymer chip in the melt extruding polymer supply part includes melt-extruding the polymer chip without dissolving the polymer chip in a solvent to produce a polymer melt, wherein the polymer melt has a melt index, And may be a polymer melt which is radiated by changing the polymer properties of the viscosity.
  • a fiber body produced by a non-solvent-melt electrospinning method using a melt-spinning apparatus for mass production of nanofibers for achieving still another object of the present invention can be provided.
  • the nanofiber mass-production molten electrospinning apparatus and solvent-free molten electrospinning method of the present invention can be applied to an electrospinning apparatus having a melt extruding polymer supplying section, without melting the polymer in a solvent, And it has an effect of electrospinning with polymer melt.
  • the wire-type nano-fiber generating portion can store the polymer melt in a twisted wire so that there is no loss of the polymer melt when the wire-type nano-fiber generator moves up and down.
  • the protrusion is formed on the surface of the wire-type nano-fiber generating portion to maximize the surface area of the portion where the polymer melt contacts, and the thickness, density, and thickness of the nanofiber generated by changing the voltage, The pore size, the strength, the orientation ratio, and the like.
  • the polymer melt has an effect of changing the polymer properties such as melt index, molecular weight, and viscosity of the polymer as variables and radiating
  • the temperature in the spinning chamber is not higher than the melting temperature of the polymer, so that it can be maintained in the form of fibers in the collector and can be obtained as a fiber.
  • FIG. 1 is a perspective view illustrating a mass-production molten electrospinning apparatus for nanofibers according to an embodiment of the present invention.
  • Fig. 2 is a front view of the nanofiber mass production molten electrospinning apparatus of Fig. 1;
  • FIG. 3 is a side view showing the right side of the nanofiber mass-production molten electrospinning apparatus of FIG.
  • FIG. 4 is a configuration diagram showing the interior of the spinning block and the spinning chamber of the nanofiber mass-production molten electrospinning apparatus of FIG. 1;
  • FIG. 5 is a circuit diagram showing the connection of the power supply of the nanofiber mass-production fusing electrospinning apparatus of FIG.
  • Fig. 6 is a bottom view showing an upper surface of a spinning block of the nanofiber mass production molten electrospinning apparatus of Fig. 1; Fig.
  • FIG. 7 is a perspective view showing an output driving unit and a wire-type nanofiber generator of the nanofiber mass-production molten electrospinning apparatus of FIG. 1;
  • FIG. 8 is a perspective view illustrating an embodiment of a coupling structure of an output driving unit and a wire-type nanofiber generator of the nanofiber mass-production molten electrospinning apparatus of FIG.
  • FIG. 9 is a view showing a height adjusting unit of the collector of the nanofiber mass production molten electrospinning apparatus of FIG. 1; FIG.
  • FIG. 10 is a flowchart showing a solvent-free melting electrospinning method using the nanofiber mass-production melt electrospinning apparatus of the present invention.
  • an element when it is stated that an element is "inside or connected to" another element, the element may be directly connected to or in contact with the other element, A third component or means for fixing or connecting the component to another component may be present when the component is spaced apart from the first component by a predetermined distance, It should be noted that the description of the components or means of 3 may be omitted.
  • the terms "part”, “unit”, “module”, “device” and the like mean units capable of handling one or more functions or operations, , Or a combination of hardware and software.
  • FIG. 1 is a perspective view illustrating a mass-production molten electrospinning apparatus for nanofibers according to an embodiment of the present invention.
  • Fig. 2 is a front view of the nanofiber mass production molten electrospinning apparatus of Fig. 1;
  • FIG. 3 is a side view showing the right side of the nanofiber mass-production molten electrospinning apparatus of FIG.
  • FIG. 4 is a configuration diagram showing the interior of the spinning block and the spinning chamber of the nanofiber mass-production molten electrospinning apparatus of FIG. 1;
  • FIG. 5 is a circuit diagram showing the connection of the power supply of the nanofiber mass-production fusing electrospinning apparatus of FIG.
  • Fig. 6 is a bottom view showing an upper surface of a spinning block of the nanofiber mass production molten electrospinning apparatus of Fig. 1; Fig.
  • FIG. 7 is a perspective view showing an output driving unit and a wire-type nanofiber generator of the nanofiber mass-production molten electrospinning apparatus of FIG. 1;
  • FIG. 8 is a perspective view illustrating an embodiment of a coupling structure of an output driving unit and a wire-type nanofiber generator of the nanofiber mass-production molten electrospinning apparatus of FIG.
  • FIG. 9 is a view showing a height adjusting unit of the collector of the nanofiber mass production molten electrospinning apparatus of FIG. 1; FIG.
  • FIG. 10 is a flowchart showing a solvent-free melting electrospinning method using the nanofiber mass-production melt electrospinning apparatus of the present invention.
  • a nanofiber mass production molten electrospinning device (1) of the present invention is a molten electrospinning device for mass - producing nanofibers by melting a solvent - free polymer, And a single integrated cylinder 107 in which a plurality of individual cylinders 105 including a screw 130 are assembled is provided.
  • a molten extruded polymer supply part 100 provided with a plurality of heating parts 150 and a temperature controller 155 for heating a plurality of individual cylinders 105;
  • a connector 170 connected to the melt extruded polymer supply unit 100 and having a heating unit 160 and a temperature controller 165;
  • a polymer melt part 230 connected to the connector 170 through a plurality of transfer nozzles 220 and opened at an upper part thereof and a radiation block 200 having a heating part 211 and a temperature controller 213
  • a spinning chamber 210 having a heating unit 217 and a temperature sensor unit 219;
  • a plurality of wire-type nanofiber generators 250 provided in the spinning chamber 210;
  • a collector 300 provided in the spinning chamber 210 and spaced apart from the plurality of wire-type nanofiber generators 250;
  • a power control unit 500 for supplying power to the wire type nanofiber generation unit 250 and the collector 300 and for supplying power to the heating units 150, 160 and 211 and the temperature controllers 155
  • the molten extruded polymer supply part 100 includes a polymer chip 10 inlet 110, a screw 130 and a connector 170, and the screw 130 is connected to the motor 120 .
  • the polymer chip 10 charged into the polymer chip input port 110 is gradually melted and transferred to the connector 170 while the screw 130 connected to the motor 120 is rotated.
  • a polymer chip 10 inlet 110 is formed in the upper part of the molten extruded polymer supply part 100 and a screw 130 for transferring the polymer melt is installed in the upper part of the molten extruded polymer supplying part 100.
  • a plurality A plurality of heating units 150 and a temperature controller 155 for heating a plurality of individual cylinders 105 are provided with individual cylinders 105 assembled into a single integrated cylinder 107.
  • the polymer melt is transported by the rotation of the screw, it is also possible to adopt a structure in which compressed gas of carbon dioxide or nitrogen gas is blown in and pressurized, and a known transporting method can be used, and there is no particular limitation on the transporting method.
  • the molten extruded polymer supply part 100 includes a heating part 150 and a temperature controller 155 to control the molten state of the polymer melt.
  • the connector 170 guides the molten extruded polymer melt in the melt extruded polymer supply part 100 to the transfer nozzle 220 of the spinning block 200.
  • the connector 170 is provided with a heating unit 160 and a temperature controller 165 to maintain the molten state of the polymer melt.
  • the spinning block 200 includes a polymer melt part 230 connected to a plurality of transfer nozzles 220 through which the polymer melt transferred from the connector 170 of the melt extrusion polymer supplying part 100 is transferred,
  • a wire type nanofiber generator 250 for immersing and scattering the stored polymer melt is provided and the spinning chamber 210 is provided with an air circulation unit 270 composed of an air suction and discharge outlet for uniformly controlling the temperature inside .
  • the heating block 211 and the temperature controller 213 are provided in the emission block 200 to control the melting state of the polymer melt.
  • the heating unit 217 is configured to be heated by the combustion of gas or oil, not a heater using electricity such as a heating wire, 219).
  • the polymer melt transferred through the connector 170 of the melt extrusion polymer supply part 100 is transferred to the polymer melt part 230 by the transfer nozzle 220.
  • the transfer nozzle 220 is connected to the connector 170 and a plurality of the transfer nozzles 220 are arranged at a predetermined interval in a row at the lower end of the emission block 200.
  • the heating of the radiation block 200 is performed by installing a heating unit 211 and a temperature controller 213 inside the metal from the outside of the radiation block 200 and heating the inside of the radiation chamber 210 through a supply pipe Prevents short circuit with high voltage by heating.
  • the heating unit 217 can be obtained in the form of fibers in the form of fibers in the collector 300 while keeping the temperature in the spinning chamber 210 not higher than the melting temperature of the polymer.
  • the molten polymer 230 is connected to the transfer nozzle 220 and is open at the top, and the transferred polymer melt is stored.
  • the wire-type nanofiber generator 250 is formed in a U-shape with an open upper portion and is formed of electrodes.
  • the shape of the wire-type nanofiber generator 250 may be a twisted wire so that the polymer melt can be stored in the twisted gap so that the wire does not lose the polymer melt at the same time.
  • a protrusion 255 is formed and a contact area with the polymer melt is increased.
  • the amount of the nanofibrous fiber body 360 irradiated can be adjusted by adjusting the voltage formed in the wire-type nanofiber generator 250 in consideration of the characteristics of the polymer melt.
  • the collector 300 is composed of an electrode for collecting the nanofibrous fiber body 360 emitted from the wire-type nanofiber generator 250.
  • the collector 300 has a negative polarity and an electric field is formed between the wire-type nanofiber generator 250 and the collector 300 when a high voltage is applied by the power controller 500.
  • the distance between the transfer nozzles 220 can be used within a range of 0.1 to 10 mm, and is mainly used within a range of 0.5 to 2 mm.
  • the diameter d of the lower end feeding nozzle 220 of the feeding nozzle 220 is 0.1 to 2.0 mm, mainly 0.2 to 0.5 mm.
  • the lower end length L and the diameter ratio L / d of the transfer nozzle 220 can be used in the range of 1 to 20, particularly in the range of 2 to 10.
  • a metal mesh may be provided at a portion of the connector 170 or before the transfer nozzle 220 to control the discharge of the polymer melt and to remove impurities.
  • the power supply controller 500 applies a high voltage to the wire-type nanofiber generator 250 and the collector 300 to form an electric field between the wire-type nanofiber generator 250 and the collector 300 Thereby allowing the polymer melt to be electrospun from the wire-type nanofiber generator 250 to the collector 300.
  • the power controller 500 supplies power to the output driver 400 so that the plurality of wire-type nanofiber generators 250 move up and down at an intersection to continuously radiate the polymer melt.
  • the power control unit 500 supplies power to the heating units 150, 160 and 211 and the temperature controllers 155, 165, and 213 provided in the melt extrusion polymer supply unit 100, the connector 170, and the radiation block 200.
  • the output driver 400 is for moving the wire-type nanofiber generator 250 up and down, and a plurality of the wire- A rotating shaft 420 installed on the driving motor 410, a rotating cam 430 rotating together with the rotating shaft 420, a rotating shaft 420 for rotating the rotating shaft 420 and the rotating cam 430, A chain 460 connected to the rotation cam 430, a drive cam 470 connected to the chain 460, a drive shaft 480 connected to the drive cam 470, a drive cam 470, And a drive shaft 490 connecting the drive shaft 480.
  • the output driver 400 may be moved up and down by a cylinder, which may be installed inside the radiation block 200 or outside the radiation block 200.
  • a cylinder which may be installed inside the radiation block 200 or outside the radiation block 200.
  • the driving shaft 480 is formed of a material capable of being electrically conductive and a voltage is applied through the driving shaft 480 to allow a current to flow therethrough so that the wire type nanofiber generator 250 generates polarity through the driving shaft 480 .
  • five wire type nanofiber generating units 250 are designed, but the number of the wire type nanofiber generating units 250 can be increased or decreased. It moves up and down at the intersection with the side wire to continuously generate nanofibers.
  • the vertical movement of the wire-type nanofiber generator 250 is controlled by the output driver 400 by controlling the moving speed, the vertical moving distance, the immersion depth, and the like.
  • the rotation cam 430 and the drive cam 470 are engaged with the chain 460 and when the drive motor 410 is operated, the rotation shaft 420, the rotation cam 430, the chain 460, the drive cam 470
  • the driving shaft 480 is rotated by applying a rotational force to the driving shaft 480, and the driving shaft 480 engaged with the driving cam 470 is rotated vertically.
  • the rotational movement of the driving cam 470 is changed to the linear movement of the driving shaft 480 by the gear combination of the driving cam 470 and the driving shaft 480.
  • the plurality of wire type nanofiber generators 250 It is moved up and down at an intersection.
  • the electrospinning apparatus 100 of the present invention may further include a skirt member 310 extending in the left-right direction of the collector 300, so that the wire-type nanofiber generator 250 may be moved up and down
  • the nanofiber fiber yarns radiated to the periphery by the electric field formed between the wire type nanofiber generator 250 and the collector 300 can be collected by the skirt member 301 even if the gravity changes.
  • the collector 300 is provided with a motor-type height adjusting unit 280 so that the collector 300 is foldable so that when the amount of the nanofiber fibers collected in the collector 300 is small, the power applied to the spinning chamber 210 is cut off, Type nanofiber generator 250 and the collector 300 are adjusted to adjust the distance between the wire-type nanofiber generator 250 and the collector 300, The fiber yarn is radiated to cause the collector 300 to collect the nanofiber fiber body 360.
  • the solvent-free fusion electrospinning method using the nanofiber mass-production melt electrospinning device (1) of the present invention is a solvent-free fusion electrospinning method using a mass-production melt electrospinning device of nanofibers (A) a step (S1100) in which the polymer chip (10) is melted and transferred in the melt extrusion polymer supply part (100); (b) transferring the polymer melt to the polymer melt portion 230 of the spinning block 200 through the connector 170 and the transfer nozzle 220 (S1200); (c) a step (S1300) of immersing the wire-type nano-fiber generating part 250 in the polymer melt of the polymer melt part 230 in the radiation block 200; (d) forming an electric field between the wire-type nanofiber generator 250 and the collector 300, which is immersed in the polymer melt and moved upward, S1400; (e) continuously spinning the polymer melt from the plurality of wire-type nanofiber generators 250 that are vertically moved in a crossing manner (S1500
  • step S1100 is a step in which the polymer chip 10 is melted and transferred in the melt extrusion polymer supply part 100.
  • the polymer chip 10 usable in step S1100 is not limited to the thermoplastic resin, and most of the polymers such as the thermosetting resin can be used.
  • examples of usable polymers include acrylonitrile-butadiene-silane (ABS), polycarbonate, polyethylene, polyesters (PE), polyimides (PI), polypropylene Polystyrene (PS), Polysulfone (PSF), Polyvinyl chrolride (PVC), Polyether Imide (PEI), Polyethylene terephthalate (PET), Thermoplastic polyester elastomer Thermoplastic polyetherester elastomer (TPEE), Polyethylene naphthalate (PEN), Polybutylene terephthalate (PBT), Polycyclohexylene terephthalate (PCT), Polyethylene oxide (PEO) , Polyvinylidene fluoride (PVDF), polylactic acid (PLA), poly Polylactic acid (PLLA), polyethylene terephthalate (PET), poly
  • step S1200 the polymer melt is transferred to the polymer melt part 230 of the spinning block 200 through the connector 170 and the transfer nozzle 220.
  • step S 1200 the polymer melt melted in step S 1100 is transferred from the connector 170 to the polymer melt part 230 through the transfer nozzle 220.
  • the polymer melt is supplied to the polymer melt part 230 through the connector 170 and the plurality of transfer nozzles 220 in a molten state by the heating part 211 and the temperature controller 213. [ And is transported to the polymer melt portion 230.
  • Step S1300 is a step in which the wire-type nanofiber generator 250 of the radiation block 200 is immersed in the polymer melt of the polymer melted portion.
  • the plurality of wire type nanofiber generators 250 are repeatedly moved up and down at an intersection by the output driver 400, and the wire type nanofiber generator 250 is lowered into the polymer melt 230
  • the polymer melt is immersed in the polymer melt, the polymer melt is contacted and attached to the protrusion 255 provided on the wire of the wire-type nanofiber generator 250.
  • step S1400 an electric field is formed between the wire-type nanofiber generator 250 and the collector 300, which are immersed in the polymer melt and moved upward.
  • the power supply control unit 500 is controlled to apply a voltage of 0 to 30 kV between the wire type nanofiber generation unit 250 and the collector 300 and may use a high voltage of 30 KV or more depending on the characteristics of the polymer melt.
  • the step S1500 is a step in which the polymer melt of the wire-type nanofiber generator 250 is electrospun and radiated to the collector 300.
  • step S1500 the polymer melt is electrospun due to the high voltage applied between the wire-type nanofiber generator 250 and the collector 300 in step S1400.
  • a high voltage is applied between the wire type nanofiber generation unit 250 and the collector 300 from the power source control unit 500, an electric field is formed.
  • the polymer melt attached to the wire type nanofiber generation unit 250 is electrically Type nanofiber generator 250 toward the collector 300 to be wound into a plurality of strands of fibers.
  • the emitted fiber yarns are moved toward the collector 300, which is a cathode, because they are charged with positive ions.
  • the wire-type nanofiber generator 250 may be irradiated with the voltage, the radiation distance, the winding speed, and the discharge amount. At this time, the distance from the wire-type nanofiber generator 250 in which the polymer melt is radiated to the collector 300 can be adjusted by vertically adjusting the electric height adjuster 280 connected to the collector 300.
  • the nanofiber fibrous body is manufactured and collected in the collector 300 and transported.
  • the emitted nanofibrous fiber bodies 360 collected in the collector 300 are transported by a transporting unit 301 having a plurality of rollers.
  • a transporting unit 301 having a plurality of rollers.
  • Polymer melts of polylactic acid (PLA) were used and the nanofibers were spun in a molten electrospinning apparatus 1 for mass production of the nanofibers under the condition of DC 50 kV to laminate nanofibers having a diameter of less than 1 ⁇ .
  • the polymer melt of nylon 66 was used and the nanofibers having a diameter of less than 1 ⁇ were laminated by spinning in the nano-fiber mass-production electrospinning device 1 under the condition of DC 50 kV.

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  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

La présente invention concerne un dispositif de fusion-électrofilage pour la production en masse de nanofibres, qui produit en masse des nanofibres par fusion d'un polymère sans solvant, le dispositif comprenant : une unité d'alimentation en polymère pour fusion et extrusion (100) ayant, au niveau de sa partie supérieure, une entrée (110) pour des copeaux de polymère (10), ayant, à l'intérieur de celle-ci, des vis (130) pour transférer des masses fondues de polymère, ayant, sur l'extérieur de celle-ci, un cylindre intégré (107) dans lequel une pluralité de cylindres individuels (105) comprenant les vis (130) sont assemblés, et ayant un dispositif de commande de température (155) et une pluralité d'unités de chauffage (150) chauffant la pluralité de cylindres individuels (105); un connecteur (170) relié à l'unité d'alimentation en polymère pour fusion et extrusion (100) et ayant une unité de chauffage (160) et un dispositif de commande de température (165); une chambre de filage (210) dans laquelle est intégré un bloc de filage (200), qui est reliée au connecteur (170) par une pluralité de buses de transfert (220), qui a une unité de fusion de polymère (230) montée dans celle-ci avec une partie supérieure ouverte, et a une unité de chauffage (211) et un dispositif de commande de température (213), et a une unité de chauffage (217) et une unité de capteur de température (219); une pluralité d'unités de génération de nanofibres de type fil (250) disposées à l'intérieur de la chambre de filage (210); un collecteur (300) disposé à l'intérieur de la chambre de filage (210), et prévu pour être espacé de la pluralité d'unités de génération de nanofibres de type fil (250), et une unité de commande de puissance (500) pour fournir de l'énergie aux unités de génération de nanofibres de type fil (250) et au collecteur (300), et fournir de l'énergie aux unités de chauffage (150, 160, 211) et aux dispositifs de commande de température (155, 165, 213).
PCT/KR2018/008324 2017-12-22 2018-07-24 Dispositif de fusion-électrofilage pour la production en masse de nanofibres, et procédé de fusion-électrofilage sans solvant WO2019124663A1 (fr)

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KR20230097832A (ko) 2021-12-24 2023-07-03 한국화학연구원 정렬된 나노섬유 얀의 대량 생산을 위한 전기방사장치

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