JP5637479B2 - Nanofiber manufacturing equipment - Google Patents

Description

The present invention relates to an apparatus for producing nanofibers made of a polymer substance.

ｑ_１：荷電粒子の荷電量１ ｑ_２：荷電粒子の荷電量２ γ：粒子間距離
ε：誘電率Conventionally, an ESD method (Electro Spray Deposition) is known as a method for producing nanofibers from a polymer solvent solution. In the ESD method, a polymer solvent solution in a container is pumped to a needle-like nozzle to which a high voltage is applied, and the polymer solvent solution that flows out linearly from the needle-like nozzle is charged there. Charge. As a result, the repulsive force (Coulomb force) due to the homopolar charge on the surface of the polymer solvent solution and the attractive force (Coulomb force) of the opposite polar charge that acts between the substrates of the polymer solvent solution are combined to reduce the surface tension of the polymer solvent solution. When exceeded, a primary dielectric explosion occurs and the polymer solution is stretched explosively.
Formula: Surface tension + electric field interference <Coulomb force (repulsive force in polymer + attractive force from substrate) + extrusion force

q ₁ : Charge amount of charged particles 1 q ₂ : Charge amount of charged particles 2 γ: Distance between particles ε: Dielectric constant

  Furthermore, as shown in FIG. 4, the polymer solution is attracted to the substrate by Coulomb force, so that the aspect ratio of the polymer solvent solution flowing out from the nozzle tip is increased. This extends the polymer solution in the longitudinal direction as fibers. The fiber that has begun to be drawn by the primary electrostatic explosion has a large specific surface area, so that the solvent evaporates rapidly. As a result, the intermolecular force of the polymer solution swollen with the solvent becomes stronger and gradually hardens. The stretching stops when the Coulomb force and the intermolecular molecules are balanced. Thereafter, evaporation further proceeds while maintaining the electric charge, and nanofibers made of a polymer having a nanometer diameter are generated.

  The nanofibers thus manufactured can be deposited on a base material placed on a collecting portion to which a high voltage is applied, thereby obtaining a three-dimensional thin film having a three-dimensional network. The nanofiber layer thus produced can be applied to air filters, battery separators, polymer electrolyte membranes of fuel cells, and the like, and can be expected to dramatically improve the performance of each.

  In the conventional ESD method, as shown in FIG. 5, the film is stretched while being in a spin state due to the influence of electric field interference. However, the diameter of the nanofiber varies due to electric field interference by itself, and the fiber quality of the fiber deteriorates. FIG. 6 shows a photograph of a high-speed camera.

  Furthermore, although it is the biggest problem of the ESD method, only a very small amount of nanofiber is produced from the tip of one capillary. For this reason, a method of mass production with a simple configuration in which a large number of capillaries are equipped and electrostatic spraying is performed from a large number of capillaries has been carried out until now, but the method using such a large number of capillaries is an electric field. Maintenance is very difficult because it requires a large spray area to avoid interference. In addition, the use of flammable organic solvents and high voltages causes explosions. As a result, the advantage that the solvent can be produced at normal temperature and normal pressure, which is an advantage of the ESD method, has been impaired by producing only a polymer that uses water or a solvent that does not ignite or does not easily ignite. Because of these problems, the manufacturing cost of nanofibers has become very high. In addition, the layer thickness of the nanofiber layer deposited on the substrate varies due to electric field interference and ion wind, and in particular, the quality of the nozzle pattern is insufficient due to projection of the nozzle pattern.

  In the problem of the quality of the nanofiber, when a large amount of nanofiber is produced using the ESD method in a narrow space, the polymer solution does not become a fiber, and droplets or ball-shaped substances adhere to the substrate. In addition, since the droplets and the ball-shaped substance significantly reduce the material utilization efficiency and cause clogging of the completed nanofiber layer, the mechanical properties of the nanofiber layer may be greatly impaired. For example, when used as a filter medium, there has been a problem that the performance of the filter is degraded.

  The reason why the generation amount is small in the conventional ESD method is that the generation amount can be increased to some extent by increasing the spray voltage and the pressure of the polymer solution, but if the spray voltage and the pressure of the polymer solution are gradually increased, the droplets Finally, there was a problem that nanofibers could not be generated.

  The reason is that the charged nanofiber cloud output from the nozzle electrostatically induces a charge of the opposite polarity to the charged nanofiber to the nozzle, so that the nozzle tip is neutralized and cannot charge the polymer solvent solution. It is. Therefore, as a method for producing a large amount of nanofibers, a method for producing a large amount of nanofibers by blowing charged nanofibers with high-pressure air can be considered.

However, simply blowing charged nanofibers with high-pressure air causes many problems in the quality of the nanofibers. Here, a method of simply blowing off with high-pressure air is referred to as a high-pressure air method. In the high-pressure air system, the problem of droplets (also referred to as liquid balls) and ball-shaped substances (also referred to as beads) occurs in common when the production amount of nanofibers is increased. That is, the following cause will be described with reference to FIG.
(1) The cause of the liquid ball is generated when a droplet is drawn out by an attractive force due to a reverse polar charge between the nozzle and the sub plate.
(2) Another cause of the liquid ball is that when the amount of liquid pressure is increased, droplets are generated at the tip of the nozzle due to pulsation caused by pipe resistance in the pipe.
(3) The cause of beads repels when the charge of the same polarity is too strong by concentrating the charges, and the beads are generated as a result of pushing the beads out of the nozzle.
(4) When high-pressure air comes into contact with the nozzle, a sphere of turbulent air is generated that entrains the solution flowing out of the nozzle and blows it away in a liquid ball state.

Further, in the case of the high-pressure air system, there are the following problems if the charged cloud is simply blown away as shown in FIG. That is,
(1) Charged nanofibers blown away with high-pressure air are continuously ejected, creating a charge cloud, and the charge cloud attracts charges of opposite polarity to the nozzle tip by electrostatic induction, and tries to neutralize the nozzle tip. Therefore, the electric charge disappears, the stretching force is lost, the droplets and solution cannot be extended, and beads are generated, making it impossible to form nanofibers.
(2) PVA using water as a solvent and Nafion, which is an ion exchange resin, could not make the leakage of the high voltage power supply zero. As a result, a current flows through the substrate and the charge on the surface of the substrate is erased. Furthermore, when charged nanofibers are attracted to and adhered to the substrate by Coulomb force, the charge on the surface of the substrate is neutralized, the amount of charge for electrostatic induction at the tip of the nozzle is reduced, and a charge is given to the polymer solvent solution. It cannot be made into nanofiber. In addition, long-time spraying is hindered when nanofibers adhere to the substrate and become dirty.

Problems to be solved by the invention

  The present invention is intended to solve the above-described problems. First, an object of the present invention is to enable mass production of optimum nanofibers without generating droplets or beads.

  Another object of the present invention is to form a nanofiber layer having a uniform thickness by preventing electric field interference and ion wind phenomena.

  Another object of the present invention is to prevent the charge at the tip of the nozzle from disappearing due to the charge cloud, the stretching force is lost, the droplets and the solution cannot be stretched, and beads are generated, making it impossible to form nanofibers.

  Another object of the present invention is to enable long-time spraying by suppressing the Coulomb force and preventing the nanofibers from adhering to the nozzles and electrode balls.

  Another object of the present invention is to eliminate the risk of explosion, electric shock and exposure in an ESD method using a high voltage by spraying a large amount of an organic solvent.

Means for solving the problem

The first solving means of the present invention will be described with reference to FIG. Here, the polarity of the high-voltage power supply can be reversed, but the polarity will be described with reference to the drawings.
First, since there is electrostatic coupling (capacitor coupling) between the nozzle and the substrate at the start of spraying, + is induced at the tip of the nozzle, and accordingly, − is induced on the substrate by electrostatic induction. When the charged nanofibers float between the nozzle and the substrate, − is electrostatically induced in the nozzle and the substrate. As a result, the amount of + charge is neutralized at the nozzle tip, and as a result, the polymer that has not been sufficiently charged becomes droplets. Therefore, mass production is enabled by utilizing the fact that capacitor coupling can be maintained by removing nanofibers having a charge floating between the nozzle and the substrate.

  The second solving means of the present invention will be described with reference to FIG. First, a dielectric plate with a hole in the center is attached to alleviate the effects of the charge cloud. Thus, the generation of negative charges due to electrostatic induction can be reduced by shielding the lines of electric force from the charge cloud from the nozzle. A substrate that induces electric charges at the tip of the nozzle by electrostatic induction can be installed at a position that does not face the nozzle to weaken the force for drawing out the droplet. The position of the substrate is an arrangement in which the charge cloud is repelled by Coulomb force because the tip of the nozzle is positive with respect to the charge cloud. As a result, it is possible to prevent nanofibers having a charge on the substrate from repelling and sticking to the substrate. Further, in the conventional positional relationship between the nozzle and the substrate, the presence of the Taylor cone at the tip of the substrate and the nozzle prevents the positive charge from concentrating on the tip of the nozzle. Keeping the substrate and nozzle in a capacitor-coupled state makes it possible to concentrate charges on the nozzle tip. As described above, FIG. 10 shows the optimum positional relationship between the nozzle and the substrate in which the cause of the droplet is eliminated.

Ｑ_１：荷電粒子の荷電量１ Ｑ_２：荷電粒子の荷電量２ ε：誘電率
γ：粒子間距離
および、ノズル先端に集まる電荷が

Ｃ：静電容量 Ｖ：電圧 ε：誘電率 γ：粒子間距離 Ｓ：面積
である点から距離を十分に離し、電圧をあげることでクーロン力を弱め、電荷量を増やすことが可能であることがわかった。The third solving means of the present invention will be described with reference to FIG. The distance between the substrate and the nozzle is important, and the electrode, blower, nozzle, and positional relationship must be considered from the following. That is, (1) it is necessary to consider the insulation strength between the electrode and the nozzle and to prevent the generation of ion wind. (2) The polymer accumulates at the nozzle tip due to the Coulomb force, and the charge at the nozzle tip is neutralized to cause droplets. (3) Since the polymer discharged from the nozzle has a positive charge, if the distance r is short, it is attracted to and adhered to the substrate by the Coulomb force. The electrostatic induction to the tip is inhibited. Therefore, the inventor calculated from the following equation that the Coulomb force is inversely proportional to the square of the distance.

Q ₁ : Charge amount of charged particles 1 Q ₂ : Charge amount of charged particles 2 ε: Dielectric constant γ: Distance between particles and charge collected at the nozzle tip

C: Capacitance V: Voltage ε: Dielectric constant γ: Interparticle distance S: A distance sufficiently away from the area, and the voltage can be increased to weaken the Coulomb force and increase the amount of charge. I understood.

  The fourth solution of the present invention will be described with reference to FIG. Due to the repulsive force of the homopolar charge between the nozzle and the substrate, beads are generated when the solution is pushed out to the nozzle opening portion where the pressure is low, that is, atmospheric pressure. Therefore, the present invention is intended to increase the pipe resistance by narrowing the nozzle inner diameter and the inner diameter of the solution popping out of the nozzle, and to increase the aspect ratio of the popping solution to promote fiberization. . Further, when the viscosity of the solution is low, not only the nozzle diameter is reduced but also the high voltage is lowered to suppress the generation of beads.

  The fifth solving means of the present invention will be described. What is important in the concept of the ESD method is that a voltage is applied between the nozzle and the substrate to form a capacitor coupling and generate a charge at the tip of the nozzle. At this time, attention is required at the GND level. In general, when a high voltage is used, the voltage level is the GND, such as a floor, a ceiling, or a wall. Therefore, when “the substrate is set to GND”, electric lines of force can be generated between the nozzle and the substrate, but since the high potential from the high voltage power source to the nozzle tip has a high potential with respect to GND, As shown in the left figure of FIG. 13, electric lines of force are generated in various places. As a result, there arises a problem that electric leakage or corona discharge occurs from the protrusion. On the other hand, as shown in the right diagram of FIG. 13, when “the nozzle is set to GND”, the electric potential lines are not generated because the nozzle and the floor, ceiling, wall, etc. are at the same potential of GND, and only the tip of the nozzle is charged. It becomes possible to concentrate. Moreover, the current of the high-voltage power supply can be made zero by sufficiently insulating the substrate and the floor, ceiling, wall, and the casing at the GND level. That is, it is optimal that the current of the high voltage power supply becomes zero during the ESD operation.

  The sixth solving means of the present invention will be described. The inventor of the present invention draws the solution at the tip of the nozzle toward the substrate by the repulsive force of the same polarity + the attractive force of the substrate, and particularly when the liquid ball is drawn out by the attractive force of the reverse polarity between the nozzle and the substrate. I found a solution by increasing the distance between them. The photo on the right in FIG. 14 shows spraying in a state where the substrate is moved away from a state where the voltage is increased. By moving the substrate away, the Coulomb force becomes smaller and the generation of liquid balls can be stopped. Further, this phenomenon can be considered to be caused by the fact that the direction in which the solution is drawn out matches the nozzle and the substrate. For this reason, the Coulomb force, which is the cause of the liquid ball, can be mitigated by arranging the substrate at a location where the position of the substrate is changed from the location facing the nozzle.

  The seventh solving means of the present invention will be described. It is characterized in that wood is used for an ESD type enclosure that generates nanofibers by utilizing the repulsion of Coulomb force by applying a high voltage and applying the same charge at the time of nanofiber generation. In general, it is conceivable to make a housing with a dielectric. However, as shown in FIG. 15, nanofibers having a charge sprayed from high-pressure air (assuming +) are charged to the dielectric on the wall of the housing by dielectric polarization. Attract and attach fibers. In addition, since the charged nanofibers have the same polarity (+) charge, they repel each other and spread toward the inner wall of the housing, and the space surrounded by the dielectric is directed from below to above. Because the air is moving, static electricity is generated by rubbing against the wall as ion wind. As a result, when the charge (+) is charged up on the surface of the dielectric and the charge (+) is charged up on the inner wall of the housing, a negative charge is induced in the air blow nozzle by electrostatic induction, and the nanofiber. The nanofibers are not generated by neutralizing the charge for generating water, and static electricity is generated due to friction with the outer wall of the enclosure due to the flow of air due to the movement of air conditioners and people, especially in winter. In this case, since the outer wall is negatively charged, the nanofibers having a positive charge are attracted to and adhered to the inner surface.As a result, the nanofibers having a charge dance, adhere to the inner wall of the enclosure, and increase the collection efficiency. Remarkably worsen. In general, a resin (vinyl chloride, acrylic, Teflon) is used as a dielectric, so that the surface is weakly dissolved in an organic solvent. Further, even Teflon tends to be softened by DMF. In contrast, cellulose, which is the main component of wood, has strong chemical resistance against organic solvents. Further, as a countermeasure against high voltage, generally, a method is considered in which a casing is made of a conductor and dropped to GND. In this case, as shown in FIG. 16, the nanofiber having the charge (assumed to be +) sprayed from the air blow nozzle is attracted to the outer conductor by electrostatic induction, so that the charged nanofiber is attached to the wall of the housing. Adheres. When charged nanofibers adhere to the conductor, the charge moves to the conductor. When the electric charge is connected to the GND, the electric charge escapes to the GND, and by repeating this operation, the charged nanofiber adheres to the exterior (conductor) before moving to the collecting portion. This significantly reduces the collection efficiency. In the case of conductors, even if winter static electricity is generated, it escapes to GND and does not affect the inside wall of the housing. However, stainless steel, iron, etc. have the disadvantage of being rusted by a solvent such as formic acid.

  Here, as the polymer substance constituting the polymer solvent solution, polypropylene, polyethylene, polystyrene, polyethylene oxide, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, poly-m-phenylene terephthalate, Poly-p-phenylene isophthalate, polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, polyvinyl chloride, polyvinylidene chloride acrylate copolymer, polyacrylonitrile, polyacrylonitrile-methacrylate copolymer, polycarbonate, polyarylate Polyester carbonate, nylon, aramid, polycabrolactone, polylactic acid, polyglycolic acid, collagen, polyhydroxybutyric acid, polyvinyl acetate, etc. can be used In particular the invention is not limited thereto.

  Solvents that can be used are methanol, ethanol, 1-propanol, 2-propanol, hexafluoroisopropanol, tetraethylene glycol, triethylene glycol, dibenzyl alcohol, 1,3-dioxolane, 1,4-dioxane, methyl ethyl ketone, methyl isobutyl. Ketone, methyl-n-hexyl ketone, methyl-n-propyl ketone, diisopropyl ketone, diisobutyl ketone, acetone, hexafluoroacetone, phenol, formic acid, methyl formate, ethyl formate, propyl formate, methyl benzoate, dimethyl, diethyl phthalate , Dipropyl phthalate, methyl chloride, ethyl chloride, methylene chloride, chloroform, methyl bromide, ethyl bromide, propyl bromide, acetic acid, benzene, toluene, hexane, cyclohexane Etc. can be used, but it is not particularly limited thereto.

Effect of the invention

As described above, the nanofiber manufacturing apparatus of the present invention provides the following effects.
(1) By connecting the nozzle side to GND, the power supply of the high-voltage power supply is made zero, so that positive charges can be supplied from GND, so mass production is possible without generating droplets or beads due to leakage. What made it possible.
(2) Since the high voltage power supply only causes electrostatic induction, no current is required and the number of nozzles can be connected indefinitely.
(3) Diluting the flammable organic solvent with air and reducing it to 2000 ppm or less prevents explosions, and the negative pressure inside the enclosure prevents nano-fibers and organic solvents from exposing the worker to exposure. There is no danger.
(4) The phenomenon of electric field interference and ion wind was prevented, and a nanofiber layer having a uniform layer pressure was formed.
(5) A reduction in the amount of charge at the nozzle tip is prevented, enabling long-time spraying.
(6) Since the polymer solution side is GND, electrical leakage is eliminated. In addition, this electrical leakage has enabled the safety of workers.
(7) Since it is not necessary to insulate the polymer solution supply related device, the device has a very safe and simple configuration.
(8) Since electric lines of force can be concentrated at the tip of the nozzle, a large amount of nanofibers can be created from one nozzle, and it is not necessary to equip many nozzles.
(9) Since mass production is possible with a simple configuration, production cost can be reduced, and power consumption and maintenance cost are not required, and there is a great effect in terms of cost.
(10) Since it is a simple device, it is easy to handle and has the effect of requiring less trouble for maintenance.
(11) Since the production and collection of nanofibers can be separated, the production amount of nanofibers can be increased freely, and the collection part can be adapted according to the product.
(12) The nanofibers can be linearly advanced in the housing, so that the nanofibers can be dried. As a result, it is possible to prevent nanofiber welding and solvent aggregation.

It is a conceptual diagram which shows the basic composition of the ESD method of the air blow system of this invention. It is a conceptual diagram which shows the basic composition of another ESD method of an air blow system. It is a block which shows the basic composition of another ESD method of an air blow system. It is a conceptual diagram which shows a primary electrostatic explosion (jumping out operation | movement) among the production | generation sequences of the conventional ESD method. It is a conceptual diagram which shows secondary electrostatic explosion (stretching operation | movement) among the production | generation sequences of the conventional ESD method. It is a high-speed camera image photograph showing a spin state by electric field interference in the conventional ESD method. It is the schematic which shows the droplet and bead generation | occurrence | production mechanism in the conventional ESD method of an air blow system. It is the schematic which shows the electric leakage generation | occurrence | production mechanism in the ESD method of the conventional air blow system. It is a basic conceptual diagram showing an air blow type ESD method of the present invention. It is a conceptual diagram of the countermeasure against droplets by the air blow type ESD method of the present invention. It is another conceptual diagram of the countermeasure against droplets by the air blow type ESD method of the present invention. It is a conceptual diagram of the countermeasure against beads by the air blow type ESD method of the present invention. It is a figure which shows the setting method of the GND level by the ESD method of the air blow system of this invention. It is a photograph which shows the mechanism of the liquid ball countermeasure by the air blow type ESD method of this invention. It is a figure which shows the generation | occurrence | production principle of the charge cloud produced when the conventional housing is used. It is a structural diagram of the air blow nozzle which comprises this invention.

Hereinafter, the nanofiber production apparatus of the present invention will be described in detail with reference to the drawings.

A description will be given with reference to FIG. First, (1) is a nozzle to which a high voltage is applied. The rear end of the nozzle (1) is connected with a tube (not shown) so that the polymer solvent solution in the container can be fed by a pump. The tip of the nozzle (1) has a needle shape, and the polymer solvent solution flows out linearly from the needle-shaped nozzle (1). An air blow (2) for discharging high-pressure air is installed behind the tip of the nozzle (1). An electrode ball (3) is installed behind the air blow (2). On the other hand, an insulating shielding plate (5) having a hole (4) is installed in front of the nozzle (1). (6) is provided with a collecting electrode having a potential opposite to that of the tip (3) of the nozzle (3) installed at a certain distance from the insulating shielding plate (5). In the present invention, in particular, the nozzle (1), the air blow (2) and the electrode ball (3) are arranged in a straight line, and the hole (4) is aligned with the tip of the nozzle (1), so that the insulating shielding plate (5) is provided. This is the point where ▼ is placed. Since the present invention has such a configuration, the nanofibers are pushed out linearly when the charged nanofibers and the nozzle (1) repel each other with the same polarity. At this time, the charge of the nanofiber having charge is electrostatically blocked by the same polarity charge at the tip of the nozzle {circle around (1)} and the insulating shielding plate {circle around (5)} and does not cause electric field interference with the electrode ball {circle around (3)}. As a result, the following operational effects can be obtained.
(1) It is possible to fly the nanofiber linearly over a long distance, and it is possible to dramatically improve the collection efficiency.
(2) The amount of air blown can be extremely reduced, thereby reducing the burden on the compressor.
(3) Since the nozzle gap can be narrowed, the nozzles can be arranged with high density. Charges can always be stably generated at the nozzle tip.
(4) By setting the leakage current to zero, a high voltage can be supplied to a large number of nozzles with a high-voltage power supply with a small capacity.
(5) The direction of the output from the nozzle is stabilized, which enables continuous long-term operation.

  This will be described with reference to FIGS. First, {circle over (10)} is a spray nozzle to which a high voltage is applied. The rear end of the spray nozzle (10) is connected with a tube (not shown) so that the polymer solvent solution in the container can be fed by a pump. The tip of the spray nozzle (10) has a needle shape, and the polymer solvent solution flows out linearly from the needle-shaped spray nozzle (10). An air blow (11) for discharging compressed air is provided behind the tip of the spray nozzle (10). A spray electrode (12) is installed behind the air blow (11). On the other hand, in front of the spray nozzle (10), an insulating shielding plate (14) made of a dielectric having a hole (13) is installed. (15) is provided with a collecting electrode having a reverse potential to the spray nozzle (1) installed at a certain distance from the insulating shielding plate (14). (16) is the inner wall of the box made of wood. Since the present invention has such a configuration, when plus is applied to the spray electrode (12), minus is electrostatically induced at the tip of the spray nozzle (10). Next, when plus is applied to the collecting electrode (15), a positive charge is generated on the surface of the collecting electrode due to the capacitor coupling with the inner wall (16) of the enclosure, and all of the collecting electrode (15) is applied to the collecting electrode (15). Electric field lines are concentrated. This attracts the charge of the nanofibers. In particular, a negative charge is electrostatically induced on the surface of the wood on the inner wall by the positive charge of the collecting electrode. As a result, the negative charge cloud is repelled by the same polarity, thereby preventing adhesion of nanofibers on the inner wall. At this time, by applying a high voltage to the collecting electrode, the capacitor coupling occurs also to the spray nozzle (10). Therefore, care must be taken to overlap with the spray electrode (12). Moreover, (17) is an electric field interference shielding plate made of a dielectric, and is installed to prevent electric field interference between nozzles when a multi-nozzle is used.

  FIG. 3 shows the structure of the air blow nozzle, which shows that it can be assembled with one touch. The nozzle is set at (18) so that it can be removed.

  In addition, in the said Example, only one Example was described, and even if it changes variously, the summary of this invention will not be changed at all.

Since the present invention can efficiently produce a large amount of nanofibers, high-quality nanofibers that are suitably applied to filters, battery separators, polymer electrolyte membranes and electrodes of fuel cells, etc. have high productivity. It can be used suitably for manufacturing.

DESCRIPTION OF SYMBOLS 1 ... Nozzle 2 ... Air blow 3 ... Electrode ball | bowl 4 ... Hole 5 ... Insulation shielding board 6 ... Collection electrode 10 ... Spray nozzle 11 ... Air blow 12 * ..Spray electrode 13 ... Hole 14 ... Insulating shielding plate 15 ... Collecting electrode 16 ... Inner wall of housing 17 ... Electric interference blocking plate

Claims (1)

A nozzle connected to a tube so that a high voltage is applied from the high voltage generator and a polymer solvent solution can be pumped to the rear end, an air blow for discharging compressed air, and an electrode ball installed behind the air blow the provided arrangement aligned, and, in front of the nozzle provided with an insulating shield, Oite the configuration in which the hole formed in the insulating shield disposed so as to match the tip of the nozzle, the nanofibers having a charge with nozzles to linearly Nanofa Iba is extruded by repelling the same polarity, charge of the nanofibers having a charge is blocked electrostatically by the polar charge and the insulating shield nozzle destination end electrode spheres nanofiber production apparatus being characterized in that the Kunar so that causing an electric field interference to.

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