KR102353832B1 - Apparatus for portable nano fiber manufacturing based on friction static electricity - Google Patents

Abstract

The present invention relates to a tribostatic-based portable nanofiber manufacturing apparatus capable of generating and supplying electric power required for manufacturing nanofibers using tribostatic electricity, comprising: a syringe accommodating a polymer solution and then discharging it to the outside through a tip; and a static electricity generating device implemented as a portable type to pressurize the syringe to a preset value and at the same time generate frictional static electricity and apply it to the tip of the syringe, wherein the static electricity generating device includes an upper roller and a lower roller spaced apart by a predetermined distance ; a device driving unit for rotating at least one of the upper roller and the lower roller; an upper electrode and a lower electrode disposed adjacent to each of the upper roller and the lower roller; It is connected to the upper roller and the lower roller and is driven by at least one of the upper roller and the lower roller to generate frictional static electricity, and then a (+) charge moves to the upper roller, and a (-) charge moves to the lower roller letting belts; and a voltage stabilization circuit for applying full-wave rectification of the voltage applied between the upper electrode and the lower electrode to the tip of the syringe by stabilizing the full-wave rectified voltage through a capacitor.

Description

Apparatus for portable nano fiber manufacturing based on friction static electricity

The present invention relates to a tribostatic-based portable nanofiber manufacturing apparatus capable of generating and supplying electric power required for nanofiber manufacturing using tribostatic static electricity.

Nano-fiber refers to an ultra-fine thread with a diameter of only tens to hundreds of nanometers (nm), and is a high-tech material whose thickness is only about 1/500 that of a human hair. A film made by mixing nanofibers with different polymer materials is called a nanofiber film, which is an electrostatic discharge material and electromagnetic wave shielding material that can be used in electronic product packaging and transportation equipment, disk drives, automobile fuel systems, and automobiles. It is used in the field of exterior e-painting.

The currently used nanofiber manufacturing method is representative of the electrospinning method using a high voltage power supply.

The electrospinning method is a method of manufacturing nanofibers while an electrically charged polymer solution overcomes the surface tension of the solution by an electrical repulsion force and is spun into a jet. used

High voltage power supplies generally use a method that generates high voltage by dividing AC 220V from a power source, but there is a risk of electric shock due to mechanical defects, user error, or problems in the operating environment (problems caused by grounding or surrounding conductors). Therefore, there is a disadvantage in that the voltage applying unit is fixed in the chamber as in FIG.

Accordingly, in order to solve the above problems, the present invention is a tribostatic-based portable that enables device weight reduction (portability) and unit cost reduction by using tribostatic electricity to generate and supply power required for nanofiber manufacturing. A nanofiber manufacturing apparatus is provided.

And to provide a tribostatic-based portable nanofiber manufacturing apparatus capable of eliminating the variability of tribostatic to ensure uniformity of nanofiber thickness.

In addition, to provide a tribostatic-based portable nanofiber manufacturing apparatus capable of variously adjusting the direction and deposition range of nanofibers.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood by those of ordinary skill in the art from the description below.

As a means for solving the above problems, according to an embodiment of the present invention, a syringe for discharging the polymer solution to the outside through the tip after accommodating; and a static electricity generating device implemented as a portable type to pressurize the syringe to a preset value and at the same time generate frictional static electricity and apply it to the tip of the syringe, wherein the static electricity generating device includes an upper roller and a lower roller spaced apart by a predetermined distance ; a device driving unit for rotating at least one of the upper roller and the lower roller; an upper electrode and a lower electrode disposed adjacent to each of the upper roller and the lower roller; It is connected to the upper roller and the lower roller and is driven by at least one of the upper roller and the lower roller to generate frictional static electricity, and then a (+) charge moves to the upper roller, and a (-) charge moves to the lower roller letting belts; And after full-wave rectification of the voltage applied between the upper electrode and the lower electrode, the voltage stabilizing the full-wave rectified voltage through a capacitor to apply a voltage stabilization circuit to the tip of the syringe. provide the device.

The voltage stabilization circuit may include: a full-wave rectifier connected between the upper electrode and the lower electrode for full-wave rectification of a voltage applied between the upper electrode and the lower electrode; and a smoothing circuit having a capacitor connected to both ends of the output of the full-wave rectifier, and smoothing and outputting the output voltage of the full-wave rectifier through the capacitor.

The static electricity generating device may further include a ground plate electrically connected to the lower electrode and positioned on a handle of the static generating device to support a user's body contact.

The static electricity generating device is operated by a user and further comprises an operation switch for determining whether to drive the device.

In this case, the static electricity generating device may further include a ground plate electrically connected to the lower electrode and positioned around the operation switch to support a user's body contact.

And the static electricity generating device is implemented in a ring shape surrounding the tip of the syringe, characterized in that it further comprises a guide electrode electrically connected to the voltage stabilization circuit.

In addition, the static electricity generating device may further include a guide electrode driving switch for controlling whether to electrically connect the voltage stabilizing circuit and the guide electrode.

Alternatively, the guide electrode may include an electrode body implemented in a ring shape; and an electrode connecting rod implemented as an antenna-type length adjusting rod to electrically connect the electrode body and the static electricity generating device.

The present invention makes it possible to reduce the weight (portability) and unit cost of an apparatus by generating and using friction static electricity.

And by additionally providing a capacitor to remove the variability of the friction static electricity supplied to the syringe, it is possible to ensure the uniformity of the nanofiber thickness.

In addition, by allowing the user's body to act as a ground, the nanofibers can be sprayed toward the user, and the nanofiber deposition range can be selectively increased through the guide electrode.

1 is a view showing a nanofiber manufacturing apparatus according to the prior art.
2 to 4 are diagrams illustrating a tribostatic-based portable nanofiber manufacturing apparatus according to an embodiment of the present invention.
5 is a view for explaining the principle of generating friction static electricity according to an embodiment of the present invention.
6 is a view showing a tribostatic-based portable nanofiber manufacturing apparatus according to another embodiment of the present invention.
7 is a diagram illustrating a tribostatic-based portable nanofiber manufacturing apparatus according to another embodiment of the present invention.

The following is merely illustrative of the principles of the invention. Therefore, those skilled in the art will be able to devise various devices that, although not explicitly described or shown herein, embody the principles of the present invention and are included within the spirit and scope of the present invention. Further, it is to be understood that all conditional terms and examples listed herein are, in principle, expressly intended solely for the purpose of enabling the concept of the present invention to be understood, and not limited to the specifically enumerated embodiments and states as such. should be

Moreover, it is to be understood that all detailed description reciting the principles, aspects, and embodiments of the invention, as well as specific embodiments, are intended to cover structural and functional equivalents of such matters. It should also be understood that such equivalents include not only currently known equivalents, but also equivalents developed in the future, i.e., all devices invented to perform the same function, regardless of structure.

Thus, for example, the block diagrams herein are to be understood as representing conceptual views of illustrative circuitry embodying the principles of the present invention. Similarly, all flowcharts, state transition diagrams, pseudo code, etc. may be tangibly embodied on computer-readable media and be understood to represent various processes performed by a computer or processor, whether or not a computer or processor is explicitly shown. should be

The functions of the various elements shown in the drawings including a processor or functional blocks represented by similar concepts may be provided by the use of dedicated hardware as well as hardware having the ability to execute software in association with appropriate software. When provided by a processor, the functionality may be provided by a single dedicated processor, a single shared processor, or a plurality of separate processors, some of which may be shared.

In addition, the clear use of terms presented as processor, control, or similar concepts should not be construed as exclusively referring to hardware having the ability to execute software, and without limitation, digital signal processor (DSP) hardware, ROM for storing software. It should be understood to implicitly include (ROM), RAM (RAM) and non-volatile memory. Other common hardware may also be included.

In the claims of the present specification, a component expressed as a means for performing the function described in the detailed description includes, for example, a combination of circuit elements that perform the function or software in any form including firmware/microcode, etc. It is intended to include all methods of performing the functions of the device, coupled with suitable circuitry for executing the software to perform the functions. Since the present invention defined by these claims is combined with the functions provided by the various enumerated means and in a manner required by the claims, any means capable of providing the functions are equivalent to those contemplated from the present specification. should be understood as

The above objects, features and advantages will become more apparent through the following detailed description in relation to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains can easily implement the technical idea of the present invention. There will be. In addition, in the description of the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

2 to 4 are diagrams illustrating a tribostatic-based portable nanofiber manufacturing apparatus according to an embodiment of the present invention.

As shown in Figure 2, the device of the present invention is implemented as a syringe 100, which is discharged to the outside through a tip after accommodating the polymer solution, and a portable type, and pressurizes the syringe 100 to a preset value and at the same time and a static electricity generating device 200 that generates friction static electricity and applies it to the tip of the syringe 100 .

The syringe 100 includes a barrel 110 , a plunger 120 and a tip 130 , and the like.

The barrel 110 accommodates the polymer solution, the plunger 120 pushes the polymer solution in the direction in which the tip 130 is disposed, and the polymer solution is discharged to the outside through the tip 130 to become nanofibers. At this time, by adjusting the force (pressure) applied to the plunger 120 , the amount of the polymer solution discharged to the outside can be adjusted. In addition, the discharge position of the polymer solution can be freely adjusted.

The static electricity generating device 200 includes a housing 210 , an operation switch 211 , a syringe pump 212 , upper/lower rollers 221 and 222 , a belt 230 , a device driving unit 240 , and upper/lower electrodes 251,252 ). , a voltage stabilization circuit 260 , and the like.

The housing 210 supports the mounting and driving of the syringe 100 and is implemented in the shape of a pistol that can be carried by the user, and the operation switch 211 and the syringe pump 212 are formed outside the housing, and inside the housing The upper/lower rollers 221 and 222 , the belt 230 , the motor 241 , the power supply unit 242 , the upper/lower electrodes 251,252 , and the voltage stabilization circuit 260 are all accommodated.

The operation switch 211 is operated by a user, and in the switched-on state, the device operation is activated through the power supply unit 242 , and in the switched-off state, the device operation is deactivated through the power supply unit 242 . It is most preferably mounted on the handle for user convenience, but is not limited thereto.

When the syringe 100 is mounted on the housing 210, the syringe pump 212 presses the plunger 120 of the syringe 100 to a predetermined value, so that the polymer solution accommodated in the syringe 100 moves the tip 130. to be uniformly discharged to the outside through the This can be implemented as a gear type having a structure that pushes the syringe while the tip and the gear structure are pushed forward when the trigger is pulled, and a spring type having a structure that pushes the syringe by inserting a spring between the jaws, as shown in FIG. 3 . have.

The upper roller 221 and the lower roller 222 are spaced apart by a predetermined distance, and a belt 230 is connected between them, and the belt 230 is driven by rotation of each roller. In this case, the upper roller 231 is preferably made of an acrylic material, the lower roller 222 is made of a metal, and the belt 230 is made of an insulating material such as rubber, but is not limited thereto.

The device driving unit 240 includes a motor 241 , a power supply unit 242 , and the like.

The motor 241 is coupled to at least one of the rotation shafts of the upper roller 221 and the lower roller 222 to rotate the rollers using power supplied from the power supply unit 242 .

The power supply unit 242 includes a battery (or a commercial battery), and generates and supplies motor driving power using the charged power thereof. In other words, the motor 241 is driven by the power supplied from the power supply unit 242, and the motor 241 promotes the rotation of the upper roller 221 and the lower roller 222, and by the rotation, the belt 230 is driven.

The upper electrode 251 is made of a conductive material such as metal, and is disposed adjacent to each of the upper roller 221 and the lower roller 222 . This is to facilitate the movement of electric charges through the belt 230 connected therebetween. The upper roller 221 may be provided with an aluminum rod, and the lower roller 222 may be provided with a PTFE Teflon rod, but is not limited thereto.

In addition, according to the present invention, tribostatic electricity is generated by alternately arranging and rubbing materials having different charging sequences. In this case, the tribostatic voltage varies depending on the state of the friction interface. That is, voltage fluctuations occur.

Accordingly, the present invention includes a voltage stabilization circuit 260 as in FIG. 4 , and through this, the voltage applied to the syringe 100 can always maintain a constant value.

The voltage stabilization circuit 260 includes a full-wave rectifier 271 connected between the upper electrode 251 and the lower electrode 252 , and a smoothing circuit 272 connected between both ends of the output of the full-wave rectifier 271 .

The full-wave rectifier 271 has four diodes or transistors D1 to D4 connected between the upper electrode 251 and the lower electrode 252, and is applied between the upper electrode 251 and the lower electrode 252 through them. The resulting voltage is full-wave rectified and output.

The smoothing circuit 272 includes a resistor R and a capacitor C connected in series across the output of the full-wave rectifier 271, and charges the voltage output from the full-wave rectifier 271 through the capacitor C and then discharges it to convert it into a voltage having a predetermined value, and apply it to the tip 130 of the syringe 100 . That is, after smoothing the output of the full-wave rectifier 271 to a predetermined value and then applying it to the tip 130 of the syringe 100, an environment for generating nanofibers without voltage fluctuation is created, and as a result, the thickness of the nanofiber is maintained at a constant value make it possible

5 is a view for explaining the principle of generating friction static electricity according to an embodiment of the present invention.

According to the present invention, when the insulating belt 230 is connected between the upper/lower rollers 221 and 222 and then driven, the negative charge of the belt 230 escapes to the ground (GND) through the lower electrode 252 .

The belt 230, which has lost the (-) charge, moves the (+) charge to the upper roller 221 , and the belt 230 again transfers the negative charge existing in the upper roller 221 or the upper electrode 251 . It is conveyed by the lower roller (222).

The negative charge transferred to the lower roller 222 is discharged to the ground GND through the lower electrode 252 disposed adjacent to the lower roller 222 .

The above process is repeated while the upper/lower rollers 221 and 222 are rotated by the motor 241, and as a result, (+) charges are accumulated in the upper electrode 251, and frictional static electricity caused by the accumulated (+) charges will continue to occur.

As described above, the present invention generates a voltage for manufacturing nanofibers by using tribostatic electricity generated by alternately arranging and rubbing materials having different charging sequences instead of a high voltage power supply.

There is no risk of electric shock due to low current, and high voltage can be obtained with a simple structure instead of a complicated circuit for rectifying from AC to DC, so it can not only secure operation stability, but also provide light weight (portability) and cost reduction effects. be able to

6 is a diagram illustrating a tribostatic-based portable nanofiber manufacturing apparatus according to another embodiment of the present invention.

As shown in (a) of FIG. 6 , the nanofiber manufacturing apparatus of the present invention additionally arranges a ground plate 270 at the user's body contact part, such as a handle part of the static electricity generating device 200 , and the ground plate 270 ) and the lower electrode 252 to be electrically connected. In this case, it is preferable that the ground plate 270 is made of a conductive metal material, but is not limited thereto.

For reference, the nanofiber discharged to the outside from the syringe 100 temporarily maintains a positive charge state according to the nanofiber generation mechanism of electrospinning, and thus has a direction toward the ground (GND).

Accordingly, in the present invention, in the case of manufacturing a medical film for applying a user's affected part through nanofibers, the user acts as a ground so that the nanofiber discharged from the syringe may be sprayed toward the user.

That is, when the user holds the device handle on which the ground plate 270 is formed for manufacturing the nanofiber with his hand, the user's body is electrically connected to the lower electrode 252 through the ground plate 270 so that the user's body is connected to the ground (GND). Thus, the nanofibers discharged from the syringe 100 to the outside can be sprayed toward the user.

In addition, as shown in (b) of FIG. 5 , the present invention forms the ground plate 270 only around the operation switch, so that the user's body is connected to the ground (GND) only while the user presses or touches the operation switch 211 . ) to act as

7 is a diagram illustrating a tribostatic-based portable nanofiber manufacturing apparatus according to another embodiment of the present invention.

As shown in (a) of Figure 7, the nanofiber manufacturing apparatus of the present invention further includes a ring-shaped guide electrode 280 surrounding the tip 130 of the syringe 100, the guide electrode 280 and the capacitor (C) are electrically connected.

In this case, the tip 130 and the guide electrode 280 are simultaneously positively charged, so that the spraying length of the nanofiber is increased. That is, the nanofiber deposition range (stable jet section) can be increased by the influence of the repulsive force and the electric force line. In addition, the nanofiber spinning direction can be adjusted through position control of the guide electrode 280 .

In addition, the nanofiber manufacturing apparatus of the present invention further includes a guide electrode driving switch 281 in addition to the guide electrode 280, through which the user can manually control whether or not the connection between the guide electrode 280 and the capacitor (C) is connected. let it be

For example, if it is necessary to increase the nanofiber deposition range, the output power of the capacitor C through the guide electrode driving switch 281 is applied to the syringe tip 130 as well as the guide electrode 280, but not In this case, the application of power to the guide electrode 280 is blocked through the guide electrode driving switch 281 .

That is, it is possible to control the nanofiber deposition range in multiple stages through the guide electrode driving switch 281 .

In addition, as shown in (b) of FIG. 7, the nanofiber manufacturing apparatus of the present invention divides the guide electrode 280 into an electrode body 280a and a housing connection rod 280b, and then connects the housing connection rod 280b to the antenna. It should be implemented according to the type length adjustment.

That is, the user directly adjusts the position of the guide electrode 280 through the length adjustment of the housing connecting rod 280b, so that the nanofiber deposition range can be varied dependently.

The method according to the present invention described above may be produced as a program to be executed by a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape. , a floppy disk, an optical data storage device, and the like, and also includes those implemented in the form of a carrier wave (eg, transmission through the Internet).

The computer-readable recording medium is distributed in a network-connected computer system, so that the computer-readable code can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the method can be easily inferred by programmers in the art to which the present invention pertains.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims (8)

a syringe that receives a polymer solution and then discharges it to the outside through a tip; and
It is implemented as a portable type and includes a static electricity generating device that pressurizes the syringe to a preset value and at the same time generates friction static electricity and applies it to the tip of the syringe,
The static electricity generating device is
an upper roller and a lower roller spaced apart by a predetermined distance;
a device driving unit for rotating at least one of the upper roller and the lower roller;
an upper electrode and a lower electrode disposed adjacent to each of the upper roller and the lower roller;
After being connected to the upper roller and the lower roller and being driven by at least one of the upper roller and the lower roller to generate frictional static electricity, (+) charges move to the upper roller, and (-) charges move to the lower roller letting belts; and
After full-wave rectification of the voltage applied between the upper electrode and the lower electrode, a tribostatic static-based portable nanofiber manufacturing device comprising a voltage stabilization circuit for voltage stabilization through a capacitor to apply the full-wave rectified voltage to the tip of the syringe . The voltage stabilization circuit of claim 1, wherein the
a full-wave rectifier connected between the upper electrode and the lower electrode for full-wave rectification of a voltage applied between the upper electrode and the lower electrode;
A tribostatic-based portable nanofiber manufacturing apparatus comprising a capacitor connected to both ends of the output of the full-wave rectifier, and a smoothing circuit for smoothing and outputting the output voltage of the full-wave rectifier through the capacitor. According to claim 1, wherein the static electricity generating device
The friction electrostatic-based portable nanofiber manufacturing apparatus according to claim 1, further comprising a ground plate electrically connected to the lower electrode and positioned on the handle of the static electricity generating device to support a user's body contact. According to claim 1, wherein the static electricity generating device
A tribostatic-based portable nanofiber manufacturing device, which is operated by a user, and further comprises an operation switch for determining whether to drive the device. 5. The method of claim 4, wherein the static electricity generating device comprises:
The friction electrostatic-based portable nanofiber manufacturing apparatus according to claim 1, further comprising a ground plate electrically connected to the lower electrode and positioned around the operation switch to support a user's body contact. According to claim 1, wherein the static electricity generating device
A tribostatic-based portable nanofiber manufacturing apparatus implemented in a ring shape surrounding the tip of the syringe and further comprising a guide electrode electrically connected to the voltage stabilization circuit. 7. The method of claim 6, wherein the static electricity generating device comprises:
Tribo-static-based portable nanofiber manufacturing apparatus, characterized in that it further comprises a guide electrode driving switch for controlling whether or not the electrical connection between the voltage stabilization circuit and the guide electrode. The method of claim 6, wherein the guide electrode
an electrode body implemented in a ring shape; and
A tribostatic-based portable nanofiber manufacturing apparatus, which is implemented as an antenna-type length adjusting rod and includes an electrode connecting rod that electrically connects the electrode body and the static electricity generating device.

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