CN211734546U - Handheld melt electrospinning device - Google Patents
Handheld melt electrospinning device Download PDFInfo
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- CN211734546U CN211734546U CN201921323044.2U CN201921323044U CN211734546U CN 211734546 U CN211734546 U CN 211734546U CN 201921323044 U CN201921323044 U CN 201921323044U CN 211734546 U CN211734546 U CN 211734546U
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- spinning nozzle
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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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
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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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
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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
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/0023—Electro-spinning characterised by the initial state of the material the material being a polymer melt
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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
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
Abstract
The utility model discloses a hand-held type fuse-element electrospinning device, including insulating housing, melt feed mechanism, spinning nozzle and electrical power generating mechanism, electrical power generating mechanism includes high voltage power supply, melt feed mechanism includes the heating pipe that can hold the polymer rod to and locate the heating pipe with the insulating heat pipe between the spinning nozzle, the melt export has been seted up to the one end of insulating heat pipe, the melt export with the sealed intercommunication of spinning nozzle, the other end port of insulating heat pipe seals its adjacent heating pipe port of intercommunication, the other end port of heating pipe is established to the material entry that can wear to establish the polymer rod; and a heating resistance wire is wound on the outer side wall of the heating pipe and is electrically connected with the power supply mechanism through a lead. The device has small volume and can realize stable melt electrospinning.
Description
Technical Field
The utility model relates to a fuse-element electricity technologies of electrospinning, concretely relates to hand-held type fuse-element electricity device of electrospinning.
Background
The electrostatic spinning nanofiber material has the excellent characteristics of specific nanoscale, large specific surface area, small pore diameter and the like, and has wide practical application prospects in the fields of biomedical treatment, energy storage catalysis, environmental management, aerospace, electronic devices and the like. The electrostatic spinning technology is a simple technology for continuously producing the nano-fibers based on high-voltage static electricity, and the method is simple, efficient, low in production cost and strong in modification processability, and is one of the research hotspots of the nano-technology in recent years. The electrostatic spinning technology comprises two parts of solution electrostatic spinning and melt electrostatic spinning, and the principle can be briefly described as that charged high molecular solution or melt overcomes the actions of surface tension, gravity and the like under the action of a high-voltage electrostatic field to form charged jet flow, the jet flow further accelerates under the action of a high-voltage electric field to move, stretching or splitting and thinning are carried out, and then the micro-nano fiber is formed through solution volatilization or melt solidification. Compared with solution electrostatic spinning, melt electrostatic spinning does not use solvent, so that solvent residue does not exist in the fiber, the problems of solvent volatilization, recovery and toxicity do not exist, and the spinning efficiency, environmental protection and biomedical practicability are greatly improved.
Therefore, melt electrospinning is considered to be a more economical and environment-friendly electrospinning method, but most of melt electrospinning devices adopt resistance wires to heat and melt high polymer materials, the resistance wires have electromagnetic interference problems on electrostatic fields formed by high-voltage power supplies at spinning nozzles, the electromagnetic interference problems limit the development of miniaturized portable melt electrospinning equipment, although Chinese patent CN203583027U discloses a handheld melt electrospinning device which adopts the heating resistance wires wound on the side walls of the melting nozzles to heat and melt the high polymer materials to form a portable device for melt electrospinning, the device with the heating resistance acting in a short distance with the spinning nozzles inevitably has obvious electromagnetic interference to seriously affect the spinning electric field, when the spinning voltage is large enough, electrostatic discharge phenomenon can even occur at the spinning nozzle ends to cause the spinning process to be impossible, therefore, such a miniaturized melt electrospinning device, which ignores the problem of electromagnetic interference between the heating resistance wire and the high-voltage electric field, cannot practically perform melt electrospinning stably.
In order to reduce the influence of electromagnetic interference of melt electrospinning on the spinning process, the structure of the existing melt electrospinning device capable of stably running is generally more complex than that of a common solution electrospinning device, the temperature of melt electrospinning is carried out, and the temperature change of high molecular melt in the liquid supply process is also reduced as much as possible so as to keep the molten state and viscosity of the melt, which means that the melt electrospinning device needs a complex heating system, a raw material supply system, a heat insulation and insulation system and the like, and great challenges are brought to portable design and self-powered electricity supply.
Therefore, the small-volume portable electrostatic spinning device which is simple in structure and can stably carry out melt electrospinning is sought to be designed, and the small-volume portable electrostatic spinning device has wide application prospect and research value.
Disclosure of Invention
Not enough to prior art, the to-be-solved technical problem of the utility model is to provide hand-held type fuse-element electricity device of spinning, the device can show the electromagnetic interference who reduces the heating resistor silk to the spinning electrostatic field to guarantee that the fuse-element electricity processes stably goes on, and the device is small simple structure, and the production and the use of being convenient for can satisfy the laboratory application, domestic, clinical medical and as teaching demonstration teaching aid many-sided small batch fibre preparation demands.
In order to achieve the above object, the utility model discloses a technical scheme be:
a handheld melt electrospinning device comprises an insulating shell, a melt supply mechanism arranged in the insulating shell, and a spinning nozzle connected with the melt supply mechanism, and a power supply mechanism, wherein the power supply mechanism comprises a high-voltage power supply for providing high-voltage direct current, the anode of the high-voltage power supply is electrically connected with the spinning nozzle through a lead, the spinning jet orifice of the spinning nozzle is arranged outside the insulating shell, the melt supply mechanism comprises a heating pipe capable of accommodating a polymer rod, and an insulating heat conduction pipe arranged between the heating pipe and the spinning nozzle, wherein one end of the insulating heat conduction pipe is provided with a melt outlet, the molten liquid outlet is communicated with the spinning nozzle in a sealing way, the port at the other end of the insulating heat conduction pipe is communicated with the port of the heating pipe adjacent to the port at the other end of the insulating heat conduction pipe in a sealing way, and the port at the other end of the heating pipe is provided with a material inlet through which a polymer bar can penetrate; and a heating resistance wire is wound on the outer side wall of the heating pipe and is electrically connected with the power supply mechanism through a lead.
Preferably, the insulating heat pipe is disposed coaxially with the heating pipe.
Preferably, the heating resistance wire is provided with a heating controller for controlling the heating temperature of the heating resistance wire, the heating controller body is arranged in the insulating shell, a control switch of the heating controller is arranged on the outer wall of the insulating shell, and the heating controller is electrically connected with a power supply mechanism.
Preferably, a gap between the insulating heat pipe and the insulating case is filled with a heat insulating material.
Preferably, the heat preservation and insulation material can be heat insulation cotton.
Preferably, the power supply mechanism comprises a lithium battery and a high-voltage converter, the lithium battery is respectively and electrically connected with the high-voltage converter and the heating resistance wire and is used as a power supply of the high-voltage converter and the heating resistance wire, and a positive pole and a negative pole of a voltage output end of the high-voltage converter are respectively used as a positive pole and a negative pole of the high-voltage power supply.
Preferably, the high voltage converter comprises a power control switch for controlling the magnitude of the output voltage thereof, and the power control switch is arranged on the insulating shell.
Preferably, the insulating shell comprises a gun barrel and a gun handle, the lithium battery and the high-voltage converter are both arranged in the gun handle, and the power control switch is arranged on the outer wall of the gun handle.
Preferably, the melt supply mechanism is arranged in the gun barrel, and a nozzle outlet for penetrating the spinning nozzle is formed in a nozzle part of the gun barrel; the spinning nozzle is a metal needle head, the metal needle head is provided with a needle seat, the molten liquid outlet is provided with a ring part matched with the needle seat, and the needle seat is sleeved on the ring part; the connection parts of the insulating heat conduction pipes and the heating pipes are respectively provided with a thread structure matched with each other, and the insulating heat conduction pipes are in threaded connection with the heating pipes.
Preferably, the distance between the spinning nozzle and the heating pipe is 5-6cm, the distance is the distance between the spinning nozzle and the heating pipe along the axial direction of the spinning nozzle, and the maximum power supply voltage of the high-voltage power supply is 20 kV.
Preferably, the insulating heat transfer pipe is an aluminum nitride ceramic pipe.
Preferably, the heating pipe and the insulating heat transfer pipe are formed of an integrally formed aluminum nitride ceramic pipe.
Preferably, the melt supply mechanism further includes a feeding unit for pushing the polymer rod material to move toward the melt outlet in the axial direction of the heating pipe in the heating pipe, and the feeding unit abuts against one end of the polymer rod material away from the melt outlet.
As preferred, the pay-off unit can be established to electronic ejection structure, if the pay-off unit is including installing in the electric putter of keeping away from rifle mouth one end of a gun section of thick bamboo, electric putter's the body of rod is followed the axis direction setting of heating pipe material entry, the rifle mouth one end of keeping away from of a gun section of thick bamboo is seted up and is worn to establish the push rod entry of the body of rod, but the pole head butt polymer rod one end of the body of rod just can stretch out and draw back in the heating tube, electric putter body fixed mounting is in an installation section of thick bamboo, an installation section of thick bamboo detachable connects the outer wall of push rod entry, electric putter body electricity is.
Preferably, the inner wall of the opening part of the mounting cylinder and the outer wall of the inlet of the push rod connected with the inner wall are provided with matched thread structures, and the mounting cylinder is in threaded connection with the gun cylinder.
Preferably, the electric push rod is provided with a push rod controller for controlling the propelling speed of the electric push rod, and a push rod control switch of the push rod controller is arranged on the outer wall of the mounting barrel.
The beneficial effects of the utility model reside in that: the handheld melt electrospinning device is simple in structure, small in size, convenient to produce, carry and use and capable of achieving stable melt electrospinning. Specifically, the method comprises the following steps:
(1) the utility model discloses a device can eliminate heating resistor silk electromagnetic interference and polymer melt and reduce the influence that makes viscosity change to the fuse-element electricity process of spinning at the transmission course temperature to realize the stability of fuse-element electricity and go on. The device separates a heating cylinder wound with a heating resistor and a spinning nozzle connected with a high-voltage power supply by a reasonable distance in a mode of additionally arranging an insulating heat-conducting cylinder between the heating cylinder and the spinning nozzle, thereby reducing the electromagnetic interference of a heating resistance wire to a spinning electrostatic field to a degree of not influencing melt electrospinning, effectively eliminating the influence of the electromagnetic interference on a spinning process, simultaneously, the insulating heat-conducting cylinder is made of heat-conducting materials, can be in direct contact with the heating cylinder to well transfer the heat of the heating cylinder, and can preserve the heat of high-molecular melt passing through the insulating heat-conducting cylinder so as to slow down the temperature reduction in the high-molecular melt transmission process caused by the farther distance between a melt heating mechanism and the spinning nozzle, and can avoid the problems that the viscosity of the spinning solution is influenced by the rapid reduction of the temperature of the high-molecular melt, and even the melt is solidified at the nozzle to, thereby ensuring the stable operation of the melt electrospinning process.
(2) Compare in current can realize stabilizing the fuse-element electricity device of spinning, adopt the more difficult heating mechanism who controls of other structures to replace simple resistance wire heating methods for solving the electromagnetic interference problem, the complicated manufacturing cost of device structure that causes risees, the numerous and diverse problem of control operation process, the utility model discloses a device is small simple structure, and the production and the use of being convenient for can satisfy laboratory application, domestic, clinical medical and as many-sided small batch fibre preparation demands such as teaching demonstration teaching aid, be favorable to using widely more.
(3) In the preferred scheme, the power supply mechanism adopts a lithium battery and a high-voltage converter which are arranged in the device as power supplies of the heating resistance wire and the spinning voltage of the device, so that the limitation of a mains supply to equipment is eliminated, the device can carry out melt electrostatic spinning under the conditions of power failure, field and the like, and the environmental adaptability of the equipment is enhanced.
Drawings
FIG. 1 is a schematic structural diagram of a handheld melt electrospinning device according to example 1;
FIG. 2 is a schematic structural diagram of a handheld melt electrospinning device according to example 2;
FIG. 3 is a front view of a hand-held melt electrospinning apparatus of example 2;
in the above figure: 1-insulating shell, 11-gun barrel, 111-nozzle outlet, 112-push rod inlet, 12-gun handle, 2-heating pipe, 3-heating component, 31-heating resistance wire, 32-heating controller, 33-heat preservation and insulation material, 4-insulating heat conduction pipe, 41-melt liquid outlet, 5-spinning nozzle, 6-conducting wire, 7-power supply mechanism, 71-lithium battery, 72-high voltage converter, 73-power supply control switch, 8-polymer rod, 9-feeding unit, 91-electric push rod body, 92-rod body, 93-rod head, 94-push rod control switch and 95-installation barrel.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "left", "right", "front", "rear", etc. indicate the positional relationship based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example (b):
as shown in fig. 1, a handheld melt electrospinning device includes an insulating housing 1, a melt supply mechanism disposed in the insulating housing 1, a spinning nozzle 5 connected to the melt supply mechanism, and a power supply mechanism 7, where the power supply mechanism 7 includes a high-voltage power supply for providing high-voltage direct current, a positive electrode of the high-voltage power supply is electrically connected to the spinning nozzle 5 through a wire 6, a spinning jet of the spinning nozzle 5 is disposed outside the insulating housing 1, the melt supply mechanism includes a heating pipe 2 capable of accommodating a polymer rod 8, and an insulating heat pipe 4 disposed between the heating pipe 2 and the spinning nozzle 5, one end of the insulating heat pipe 4 is provided with a melt outlet 41, the melt outlet 41 is in sealed communication with the spinning nozzle 5, and another end port of the insulating heat pipe 4 is in sealed communication with an adjacent port of the heating pipe 2, the port at the other end of the heating pipe 2 is provided with a material inlet 21 through which a polymer bar can pass; the outer side wall of the heating pipe 2 is provided with a heating component 3, the heating component comprises a heating resistance wire 31 wound on the heating pipe 2, and the heating resistance wire 31 is electrically connected with the power supply mechanism 7 through a lead 6.
The method for carrying out melt electrospinning by adopting the device of the utility model comprises the following steps:
(1) processing a high polymer material as a spinning raw material into a high polymer bar 8 which can be inserted into the heating cylinder 2 by the existing processing means;
(2) inserting the polymer bar obtained in the step (1) into a heating cylinder 2, and communicating a heating resistance wire 31 with a power supply mechanism 7 to heat and melt the polymer bar 8 in the heating cylinder 2; after the polymer bar 8 is melted to generate polymer melt, the polymer bar 8 is pushed or driven by gravity to enable the polymer melt to enter the insulating heat conduction pipe 4 and flow through the insulating heat conduction pipe 4 to enter the spinning nozzle 5, so that liquid supply of the melt supply mechanism to the spinning nozzle 5 is realized;
(3) the jet orifice of the spinning nozzle 5 is aligned to a collector for receiving electrospun fibers, a high-voltage power supply connected with the spinning nozzle 5 is started, the spinning voltage and the spinning distance are adjusted, the high-molecular molten liquid at the jet orifice of the spinning nozzle 5 is sprayed out under the action of electric field force, then stretching and splitting are carried out, a fiber film is formed by deposition on the collector, and the spinning can be stopped by turning off the power supply mechanism after the spinning process is completed.
The utility model discloses a method that the device was applied to fuse-element electricity and spins makes the viscosity change to the influence of fuse-element electricity spinning process for can eliminating 31 electromagnetic interference of heating resistor silk and polymer melt liquid temperature reduction in transmission process to realize the stability of fuse-element electricity spinning and go on. The device is through the mode of establishing insulating heat conduction section of thick bamboo 4 between the cartridge heater 2 that has the winding heating resistor 31 and the spinning nozzle 5 of connecting high voltage power supply, separates the two reasonable distance to make heating resistor 31 reduce the electromagnetic interference of 5 department electrostatic fields of spinning nozzle to the degree that does not influence the melt electricity and spin, can effectively eliminate electromagnetic interference to the influence of spinning process. Simultaneously, insulating heat conduction section of thick bamboo 5 takes the heat conduction material to make, its heat with the transmission heating cylinder 2 that heating cylinder 2 direct contact can be fine, thereby keep warm to the polymer melt that flows through insulating heat conduction section of thick bamboo 4, with the temperature that slows down the polymer melt transmission in-process that melt heating mechanism and spinning nozzle apart from drawing far and arouse descends fast, can avoid influencing the spinning state unstability because of the polymer melt temperature reduces fast, there is the melt solidification to directly hinder the problem that the spinning goes on in shower nozzle department even, thereby guarantee the stable of fuse-element electricity spinning process and go on.
Specifically, the insulating heat conduction pipe 4 is arranged coaxially with the heating pipe 2.
Specifically, the distance between the joint of the spinning nozzle 5 and the melt outlet 41 and the heating pipe 2 is 5-6cm, the distance is the distance between the two along the axial direction of the spinning nozzle, and the maximum power supply voltage of the high-voltage power supply is 20 kV.
The inventor tests the influence of the distance between the spinning nozzle 5 and the heating pipe 2 on the spinning process by adopting the insulating heat conduction pipes 4 with different lengths and setting the spinning voltage to be 20kV, when the distance between the joint of the spinning nozzle 5 and the melt outlet 41 and the heating pipe 2 is less than 5cm, electrostatic discharge is easily generated at the spinning nozzle, the spinning process is difficult to stabilize, when the distance is more than 6cm, the temperature of the spinning solution is greatly reduced, which causes the viscosity change of the high molecular molten solution and influences the spinning stability, especially when the distance is more than 8cm, the high molecular molten solution is easy to solidify at the spinning nozzle to block the spinning nozzle, which makes the spinning process difficult to perform, when the maximum supply voltage of the high voltage power supply of the device is preset to 20kV, the distance between the connection part of the spinning nozzle 5 and the melt outlet 41 and the heating pipe 2 is preferably 5-6 cm.
Specifically, the insulating heat transfer tube 4 is an aluminum nitride ceramic tube.
The inventors tested the heat conducting effect of the insulating heat conducting pipe 4 of the same structure made of different heat conducting ceramics. The testing method comprises the steps of respectively taking a quartz tube, a calcium oxide ceramic tube and an aluminum oxide ceramic tube with the same specification as access devices of the insulated heat conduction tube 4, heating for 4 minutes, and measuring the length of the tube with the temperature of more than 150 ℃ by using an infrared thermometer and an infrared thermal imager. Experiments show that the usable length of the quartz tube is 2.1cm, the usable length of the calcium oxide ceramic tube is 3.2cm, and the usable length of the aluminum oxide ceramic tube is 6.0 cm. Therefore, the insulating heat conduction pipe 4 made of the aluminum nitride ceramic has the best heat conduction effect, and can fully meet the heat preservation requirement of the device on the high molecular molten liquid in the insulating heat conduction pipe 4 within the range of 5-6cm, and the influence of viscosity change caused by temperature reduction of the high molecular molten liquid in the transmission process on the melt electrospinning process is avoided, so that the melt electrospinning can be stably carried out.
Specifically, the heating pipe 2 and the insulating heat conduction pipe 4 may be an integrally formed aluminum nitride ceramic pipe.
Specifically, in order to control the polymer melting process conveniently, the heating resistance wire 31 is equipped with a heating controller 32 for controlling the heating temperature thereof, the body of the heating controller 32 is installed in the insulating shell 1, a control switch of the heating controller 32 is installed on the outer wall of the insulating shell 1, and the heating controller 32 is electrically connected with the power supply mechanism 7.
Specifically, the gap between the insulating heat transfer tube 4 and the insulating housing 1 is filled with a heat insulating material 33. The arrangement of the heat-insulating material 33 can better slow down the temperature reduction of the liquid flow flowing through the insulating heat-conducting pipe 4, and better reduce the influence of the viscosity change on the melt electrospinning process caused by the temperature reduction of the polymer melt in the transmission process, so as to realize the stable operation of the melt electrospinning.
Specifically, the heat insulating material 33 may be heat insulating cotton.
Specifically, in order to improve the heating effect and facilitate the holding, the gap between the heating pipe 2 and the insulating housing 1 is also filled with a heat insulating material 33.
Specifically, in order to get rid of the limitation of an external power supply, the power supply mechanism 7 includes a lithium battery 71 and a high voltage converter 72 which are arranged in the insulating housing 1, the lithium battery 71 is electrically connected with the high voltage converter 72 and the heating resistance wire 31 respectively and serves as a power supply for the high voltage converter 72 and the heating resistance wire 31, and a positive electrode and a negative electrode of a voltage output end of the high voltage converter 72 serve as a positive electrode and a negative electrode of the high voltage power supply respectively.
The power supply mechanism 7 adopts the lithium battery 71 and the high-voltage converter 72 which are arranged in the device as power supplies of the heating resistance wire 71 and the spinning voltage of the device, so that the limitation of a mains supply to equipment is eliminated, the device can carry out melt electrostatic spinning under the conditions of power failure, field and the like, and the environmental adaptability of the equipment is enhanced.
Besides the above arrangement of the power supply mechanism 7, the power supply mechanism 7 of the present application may also adopt other power supply modes that can realize the power supply of the heating resistance wire 31 and the high voltage power supply of the spinning nozzle 5, for example, the external power supply adopts the commercial power supply.
Specifically, the high voltage converter 72 includes a power control switch 73 for controlling the magnitude of the output voltage, and the power control switch 73 is disposed on the insulating housing 1.
Specifically, for the convenience of hand holding, the insulating housing 1 includes a gun barrel 11 and a gun handle 12, the lithium battery 71 and the high voltage converter 72 are both installed in the gun handle 12, and the power control switch 73 is installed on the outer wall of the gun handle 12.
Specifically, the melt supply mechanism is arranged in the gun barrel 11, and a nozzle outlet 111 for penetrating the spinning nozzle 5 is formed in a nozzle part of the gun barrel 11; the spinning nozzle 5 is a metal needle head, the metal needle head is provided with a needle seat, the molten liquid outlet is provided with a ring part matched with the needle seat, and the needle seat is sleeved on the ring part; the connection parts of the insulating heat conduction pipes 4 and the heating pipes 2 are respectively provided with a thread structure matched with each other, and the insulating heat conduction pipes 4 are in threaded connection with the heating pipes 2.
Specifically, one end port of the insulating heat pipe 4 is sleeved in the heating pipe 2, an external thread is arranged on the outer wall of the port of the insulating heat pipe 4 connected with the heating pipe 2, an internal thread matched with the external thread of the insulating heat pipe 4 connected with the heating pipe 2 is arranged on the inner wall of the heating pipe corresponding to the external thread of the insulating heat pipe 4, and the insulating heat pipe 4 is connected with the heating pipe through a thread structure.
Besides the above connection method, the insulating heat conduction pipe 4 and the heating pipe 2 can also be connected by other sealing connection methods capable of preventing the polymer melt from overflowing from the connection end.
Example 2
As shown in fig. 2 and 3, a handheld melt electrospinning device has a structure similar to that of example 1, and the main differences are that: the melt supply mechanism further comprises a feeding unit 9 for pushing the polymer rod 8 to move towards the melt outlet 41 in the heating pipe 2 along the axial direction of the heating pipe 2, and the feeding unit 9 is abutted to one end, far away from the melt outlet 41, of the polymer rod 8. The feeding unit 5 can conveniently push the polymer bar 8 to realize the liquid supply speed of the melt liquid supplied to the spinning nozzle by the melt liquid supply mechanism, and the spinning process is conveniently regulated and controlled.
Specifically, feeding unit 9 can be established to electronic ejection structure, if feeding unit 9 is including installing in the electric putter of keeping away from rifle mouth one end of a gun section of thick bamboo, electric putter's body of rod 92 is followed the axis direction setting of 2 material inlets 21 of heating pipe, rifle barrel 11 is kept away from rifle mouth one end and has been seted up and to be worn to establish the push rod entry 112 of the body of rod 92, but the pole head 93 of the body of rod 92 butt polymer rod 8 one end just can stretch out and draw back in the heating pipe 2, electric putter body 91 (push rod motor) fixed mounting is in installation section of thick bamboo 95, installation section of thick bamboo 95 detachable connects the outer wall of push rod entry 112, electric putter body 91 electricity is connected power supply mechanism 7 is for the electric putter power supply.
Specifically, the inner wall of the opening of the mounting cylinder 95 and the outer wall of the push rod inlet 112 connected with the mounting cylinder are provided with matched thread structures, and the mounting cylinder 95 is in threaded connection with the gun barrel 11.
Specifically, the electric push rod is provided with a push rod controller for controlling the propelling speed of the electric push rod, and a push rod control switch 94 of the push rod controller is installed on the outer wall of the installation cylinder 95.
In addition, the feeding unit 9 can be provided with other mechanical or electrical components capable of pushing the polymer rod 8 into the heating tube 2, such as a pushing feeding component similar to a glass cement gun.
Example 3
The preparation method for preparing the polycaprolactone micro-nanofiber by adopting the handheld melt electrospinning device in the embodiment 1 comprises the following steps:
(1) polycaprolactone serving as a spinning raw material is processed into a polymer bar 8 which can be inserted into the heating cylinder 2 by the conventional processing means;
(2) inserting the polymer bar obtained in the step (1) into a heating cylinder 2, communicating a heating resistance wire 31 with a power supply mechanism 7 to heat and melt the polymer bar 8 in the heating cylinder 2, controlling the heating temperature to be 200 ℃, continuously heating 4 min to melt the polymer bar 8 to generate polymer melt, vertically placing a spinning nozzle 5 downwards, allowing the polymer melt to enter an insulating heat conduction pipe 4 under the action of gravity, and allowing the polymer melt to flow through the insulating heat conduction pipe 4 and enter the spinning nozzle 5, so as to realize liquid supply of the melt supply mechanism to the spinning nozzle 5;
(3) the jet orifice of the spinning nozzle 5 is aligned to a collector for receiving electrospun fibers, a high-voltage power supply connected with the spinning nozzle 5 is started, the spinning voltage is adjusted to be 20kV, the spinning distance is 15cm, the high-molecular molten liquid at the jet orifice of the spinning nozzle 5 is sprayed out under the action of electric field force, then the micro-nano fibers are formed by stretching and splitting, the spinning is continued for 5 min, and after a fiber film is formed by deposition on the collector, the spinning can be stopped by closing a power supply mechanism.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A handheld melt electrospinning device comprises an insulating shell, a melt supply mechanism arranged in the insulating shell, and a spinning nozzle connected with the melt supply mechanism, the power supply mechanism comprises a high-voltage power supply for providing high-voltage direct current, the anode of the high-voltage power supply is electrically connected with the spinning nozzle through a lead, the spinning jet orifice of the spinning nozzle is arranged outside the insulating shell, it is characterized in that the melt supply mechanism comprises a heating pipe capable of accommodating a polymer bar and an insulating heat conduction pipe arranged between the heating pipe and the spinning nozzle, one end of the insulating heat conduction pipe is provided with a melt outlet which is communicated with the spinning nozzle in a sealing way, the port at the other end of the insulating heat conduction pipe is communicated with the port of the heating pipe adjacent to the port at the other end of the insulating heat conduction pipe in a sealing way, and the port at the other end of the heating pipe is provided with a material inlet through which a polymer bar can penetrate; and a heating resistance wire is wound on the outer side wall of the heating pipe and is electrically connected with the power supply mechanism through a lead.
2. The handheld melt electrospinning device of claim 1, wherein a gap between the insulated heat pipe and the insulated housing is filled with a thermal insulating material.
3. The handheld melt electrospinning device according to claim 1, wherein the power supply mechanism comprises a lithium battery and a high-voltage converter, the lithium battery is electrically connected with the high-voltage converter and the heating resistance wire respectively and serves as a power supply for the high-voltage converter and the heating resistance wire, and a positive pole and a negative pole of a voltage output end of the high-voltage converter serve as a positive pole and a negative pole of the high-voltage power supply respectively.
4. The hand-held melt electrospinning device of claim 3, wherein the high voltage converter comprises a power control switch for controlling its output voltage, the power control switch being provided on the insulating housing.
5. The hand-held melt electrospinning device of claim 4, wherein the insulating housing comprises a gun barrel and a gun handle, the lithium battery and the high voltage converter are both mounted within the gun handle, and the power control switch is mounted on an outer wall of the gun handle.
6. The handheld melt electrospinning device according to claim 5, wherein the melt supply mechanism is arranged in the gun barrel, and a nozzle outlet for penetrating the spinning nozzle is formed in a nozzle portion of the gun barrel; the spinning nozzle is a metal needle head, the metal needle head is provided with a needle seat, the molten liquid outlet is provided with a ring part matched with the needle seat, and the needle seat is sleeved on the ring part; the insulating heat conduction pipe and the heating pipe are coaxially arranged, the connection part of the insulating heat conduction pipe and the heating pipe is respectively provided with a thread structure matched with each other, and the insulating heat conduction pipe is in threaded connection with the heating pipe.
7. The handheld melt electrospinning device according to claim 1, wherein the distance between the spinning nozzle and the heating tube is 5-6cm, the distance is a distance along the axial direction of the spinning nozzle, and the maximum power supply voltage of the high-voltage power supply is 20 kV.
8. The handheld melt electrospinning device of claim 1, wherein the insulated heat conducting tube is provided as an aluminum nitride ceramic tube.
9. The handheld melt electrospinning device of claim 8, wherein the heating tube and the insulated heat conducting tube are formed of an integrally formed aluminum nitride ceramic tube.
10. The handheld melt electrospinning device according to claim 1, wherein the melt supply mechanism further comprises a feeding unit for pushing the polymer rod to move axially along the heating pipe in the heating pipe towards the melt outlet, and the feeding unit abuts against one end of the polymer rod away from the melt outlet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910542238X | 2019-06-20 | ||
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| KR101056255B1 (en) * | 2009-09-08 | 2011-08-11 | 주식회사 효성 | Electrospinning insulated nozzle pack and electrospinning apparatus comprising the same |
| KR20110079249A (en) * | 2009-12-31 | 2011-07-07 | 주식회사 효성 | Melt electrospinning device and multi-nozzle block for the same |
| CN102912458B (en) * | 2012-11-08 | 2014-11-26 | 厦门大学 | Electrospinning nanofiber membrane preparing device with heating function |
| CN203583027U (en) * | 2013-12-05 | 2014-05-07 | 厦门大学 | Handheld fusion electrospinning device |
| JP6209480B2 (en) * | 2014-04-23 | 2017-10-04 | 花王株式会社 | Melt electrospinning apparatus and fiber manufacturing method |
| CN104790049B (en) * | 2015-04-29 | 2016-09-07 | 青岛新智源健康科技有限公司 | A kind of portable electrostatic spinning equipment and using method thereof |
| CN205529163U (en) * | 2016-01-20 | 2016-08-31 | 福建师范大学 | Single screw rod extrusion by melting electrostatic spinning device |
| CN105543986B (en) * | 2016-02-04 | 2018-06-22 | 青岛大学 | A kind of melt electrostatic spinning device for not depending on alternating current |
| JP6889072B2 (en) * | 2017-09-11 | 2021-06-18 | 花王株式会社 | Compositions for molten electric field spinning, fibers and methods for producing them |
| CN109797444B (en) * | 2019-03-08 | 2024-04-09 | 青岛科技大学 | High-voltage electrode built-in portable melt electrostatic spinning device |
| CN211734546U (en) * | 2019-06-20 | 2020-10-23 | 青岛大学 | Handheld melt electrospinning device |
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