CN106757423B - Vibration multi-needle-point electrostatic spinning device - Google Patents
Vibration multi-needle-point electrostatic spinning device Download PDFInfo
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- CN106757423B CN106757423B CN201710060156.2A CN201710060156A CN106757423B CN 106757423 B CN106757423 B CN 106757423B CN 201710060156 A CN201710060156 A CN 201710060156A CN 106757423 B CN106757423 B CN 106757423B
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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
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Abstract
A vibration multi-needle-point electrostatic spinning device relates to electrostatic spinning. The device is provided with a power supply, a solution tank, a liquid supply device, a multi-needle-tip group, a guide sleeve plate, a telescopic rod, a collecting device, a vibration generator, a heating block, a conduit and a vibration transducer. The solution tank is provided with a liquid inlet interface, a liquid outlet interface and an external through hole; the liquid supply device is connected with the solution tank through a liquid inlet interface of the solution tank and a guide pipe; the vibration generator is connected with the bottom surface of the base of the multi-needle-point group through an external through hole of the solution tank and the vibration transducer, and the external through hole is sealed by a sealing ring; the bottom surfaces of the multiple needle point groups are connected with the top of the telescopic rod; the bottom of the telescopic rod is fixedly connected to the bottom surface of the solution tank; the heating blocks are uniformly distributed in the solution tank and used for heating the melt in the melt electrospinning; the multi-needle-point group is connected with a power supply through a lead; the collecting device is arranged right above the solution tank; the symmetry axes of the multi-needle-tip group, the guide sleeve plate and the vibration shaft of the vibration transducer are overlapped.
Description
Technical Field
The invention relates to electrostatic spinning, in particular to a vibration multi-needle-point electrostatic spinning device.
Background
Electrospinning is a popular method of making nanofibers in recent years. The prepared fiber membrane has the characteristics of small diameter, high porosity, large specific surface area, high permeability and the like, so that the fiber membrane becomes a hotspot for researching the preparation of the nano fiber at present. The fiber prepared by the electrostatic spinning technology has wide application in the fields of spinning, filters, biomedicine, photoelectric materials, catalysts, sensors and the like.
Electrostatic spinning is to make polymer solution or melt carry high voltage static electricity to form a Taylor cone under the action of an electric field, and when the electric field is increased enough to overcome the surface tension of liquid drops, a charged jet trickle is formed at the tip of the Taylor cone. Under the action of electric field force, viscous resistance, surface tension and the like, the solvent is volatilized through whip, stretching and thinning of the fiber and finally deposited on a collecting device to form the fiber.
The traditional electrostatic spinning adopts a single spinning nozzle to prepare fibers, so that the efficiency is low, and the mass production of the fibers cannot be realized. At present, the method for improving the efficiency of the electrostatic spinning nanofiber mainly adopts multiple spinning nozzles to carry out electrostatic spinning (Theron S A, yarin A L, zussman E, et al, multiple jets in electrospinning: experimental and moulding [ J ]. Polymer,2005,46 (9): 2889-2899), and most of the methods adopt the assembly of multiple standard injection spinning nozzles, extrude solution or melt by the pushing of mechanical force and carry out spinning by the stretching of electric field force. However, most of the spinning nozzle diameters of the standard injection nozzles are in the micron-sized range, electrostatic spinning is performed by using the nozzles, the nozzles are easily blocked due to solvent volatilization or excessively high melt solidification speed, spinning preparation is interrupted, production efficiency is affected, the nozzles need to be replaced and cleaned, spinning efficiency is reduced, and spinning cost is improved. In addition, for the solution or the melt with higher viscosity, because the surface tension of the solution or the melt is large, the solution or the melt is difficult to overcome the surface tension to form the jet stream, and the current solution method mainly adopts the method of improving the direct current voltage applied to the spray head, so that the solution of the solution or the melt at the spray head overcomes the surface tension to form the jet stream, but the excessive voltage easily causes the ionization of air. In the electrostatic spinning process, besides the method for overcoming the surface tension of the solution by utilizing the electric field force, the method for effectively destroying the surface tension of the solution by adopting external force interference is also a method. The mechanical vibration can enhance the fluidity of the solution, and the foreign object is contacted with the surface of the solution to puncture the surface and overcome the surface tension, which are ways to effectively destroy the surface tension. At present, the solution is in a dynamic flowing state by adopting an ultrasonic oscillation mode, and the surface tension of the solution is overcome to form a plurality of jet flows. However, in the electrostatic spinning process, the position of the standing wave can be deviated, the position and the direction of the formation of the taylor cone are not fixed, the uniformity of the jet flow and the formed fiber is low, and the interference between the jet flows is easy to occur.
Disclosure of Invention
In order to solve the technical problems, the invention provides the vibrating multi-needle-point electrostatic spinning device which can overcome the blocking problem caused by a standard injection nozzle and the problem that high-viscosity solution or melt is difficult to overcome surface tension to form jet flow, ensure stable and rapid injection of multiple jet flows and realize mass production of fibers.
The invention is provided with a power supply, a solution tank, a liquid supply device, a multi-needle-tip group, a guide sleeve plate, a telescopic rod, a collecting device, a vibration generator, a heating block, a conduit and a vibration transducer. The solution tank is provided with a liquid inlet interface, a liquid outlet interface and an external through hole; the liquid supply device is connected with the solution tank through a liquid inlet interface of the solution tank and a conduit; the vibration generator is connected with the bottom surface of the base of the multi-needle-point group through an external through hole of the solution tank and the vibration transducer, and the external through hole is sealed by a sealing ring; the bottom surface of the multi-needle-point group is connected with the top of the telescopic rod; the bottom of the telescopic rod is fixedly connected to the bottom surface of the solution tank; the heating blocks are uniformly distributed in the solution tank and used for heating the melt in the melt electrospinning; the multi-needle-point group is connected with a power supply through a lead; the collecting device is arranged right above the solution tank; the symmetry axes of the multi-needle-tip group, the guide sleeve plate and the vibration shaft of the vibration transducer are overlapped.
The solution tank can adopt an open type insulation plastic solution tank, the liquid inlet interface can be arranged at the top of the solution tank, and the interface is sealed to prevent the solution from leaking.
And adding the spinning solution into the solution tank through a liquid supply device, and keeping the liquid level of the spinning solution or the melt in the solution tank constant in the spinning process.
The telescopic rods can be distributed below the multi-needle-point groups and used for supporting the multi-needle-point groups, so that the multi-needle-point groups keep balance when vibrating.
The vibration frequency of the vibration generator can be 0.1Hz to 20kHz, and the amplitude can be 0.001 to 50mm.
And the vibration generator is connected with the multi-needle-point group, and an external through hole and the vibration transducer are sealed, so that the leakage of solution is prevented.
The multi-tip set may be made of a conductive material.
The guide sleeve plate can be provided with through holes which are arranged with the needle points of the multi-needle-point group and have the same number, can be made of insulating materials and is fixed in the solution tank at a certain height.
The array needle points of the multiple needle point groups respectively penetrate through the through holes arrayed on the guide sleeve plate, so that overlarge deviation caused by large length-diameter ratio and poor rigidity of the needle points is avoided, and mutual interference among the needle points is avoided.
The heating blocks can be provided with at least 2 blocks, and the at least 2 heating blocks are uniformly distributed in the solution tank.
The invention carries out batch continuous spinning by a vibrating multi-needle-point electrostatic spinning device, drives the multi-needle-point group to vibrate by the vibration generator, the multi-needle-point group punctures the surface of the solution or the melt to destroy the surface tension of the solution or the melt, and the electric field intensity at the top end of the multi-needle-point group is the maximum, so that the small voltage applied on the multi-needle-point group can overcome the surface tension of the solution or the melt, and a plurality of jet flows are formed at the array needle points, thereby effectively increasing the spinning speed, increasing the yield of electrostatic spinning and realizing the continuous and large-scale production of nano fibers. The spray head adopts the upward array multi-needle-point group, so that the phenomenon of blockage of the traditional standard injection spray head structure is effectively avoided, frequent replacement and cleaning of the spray head are not needed, and the production efficiency is improved. In addition, the whole vibration multi-needle-point electrostatic spinning device is a detachable open device, so that the device is easy to clean and control.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Each label in the figure is: 1-a vibration generator; 2-free telescopic rod; 3-heating block; 4-a solution tank; 5-multiple needle tip group; 6-guide sleeve plate; 7-a power supply; 8-a roll-to-roll collection device; 9-a catheter; 10-a liquid supply device; 11-a liquid inlet interface; 12-liquid outlet interface; 13-external connection through hole; 14-vibration transducer.
Fig. 2 is a top view of embodiment 1 of the present invention.
Fig. 3 is a plan view of a guide shoe in embodiment 1 of the present invention.
Fig. 4 is a top view of a multi-tip set in accordance with example 1 of the present invention.
Fig. 5 is a top view of a multi-tip set in example 2 of the present invention.
Fig. 6 is a schematic structural diagram in embodiment 3 of the present invention.
Fig. 7 is a top view of a multi-tip set in example 3 of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific examples. It should be understood that the described embodiments are illustrative only and are not limiting upon the scope of the invention.
Example 1:
as shown in fig. 1 and 2, the embodiment of the present invention includes a power supply 7, a solution tank 4, a liquid supply device 10, a multi-needle-point group 5, a guide sleeve plate 6, a telescopic rod 2, a collecting device 8, a vibration generator 1, a heating block 3, and a vibration transducer 14. The solution tank 4 is provided with a liquid inlet port 11, a liquid outlet port 12 and an external through hole 13; the liquid supply device 10 is connected with the solution tank 4 through a liquid inlet interface 11 of the solution tank 4; the vibration generator 14 is connected with the bottom surface of the base of the multi-needle-point group 5 through an external through hole 13 of the solution tank 4 and the vibration transducer 14, and the external through hole 13 is sealed by a sealing ring; the bottom surface of the multi-needle-point group 5 is connected with the top of the telescopic rod 2; the bottom of the telescopic rod 2 is fixedly connected to the bottom surface of the solution tank 4; the heating blocks 3 are uniformly distributed in the solution tank 4 and used for heating the melt in the melt electrospinning; the multi-needle-point group 5 is connected with a power supply 7 through a lead; the collecting device 8 is arranged right above the solution tank 4; the symmetry axes of the multi-needle-tip group 5, the guide sleeve plate 6 and the vibration shaft of the vibration transducer 14 are mutually overlapped.
The solution tank 4 can be an open type insulation plastic solution tank, the liquid inlet interface 11 can be arranged at the top of the solution tank 4, and the interface is sealed to prevent the solution from leaking.
And adding the spinning solution into the solution tank through the solution supply device, and keeping the liquid level of the spinning solution or the melt in the solution tank constant in the spinning process.
The telescopic rods can be distributed below the multi-needle-point groups and used for supporting the multi-needle-point groups, so that the multi-needle-point groups keep balance when vibrating.
The vibration frequency of the vibration generator can be 0.1Hz to 20kHz, and the amplitude can be 0.001 to 50mm.
And the vibration generator is connected with the external through hole for connecting the multi-needle-point group and the vibration transducer for sealing treatment, so that the leakage of the solution is prevented.
The multi-tip set may be made of a conductive material.
The guide sleeve plate can be provided with through holes which are arranged with the needle points of the multi-needle-point group and have the same number, can be made of insulating materials and is fixed in the solution tank at a certain height.
The array needle points of the multiple needle point groups respectively penetrate through the through holes arrayed on the guide sleeve plate, so that overlarge deviation caused by large length-diameter ratio and poor rigidity of the needle points is avoided, and mutual interference among the needle points is avoided.
The heating blocks can be provided with at least 2 blocks, and the at least 2 heating blocks are uniformly distributed in the solution tank.
The solution supply device 10 injects solution into the solution tank 4 according to the requirement in the spinning process, the liquid level in the solution tank 4 is always kept at a certain height, the lowest point of the multi-needle-point group in the vibration process is lower than the surface position of the solution, and the highest point is 0.001-50 mm higher than the surface of the solution, so that the multi-needle-point group can not only achieve the effects of puncturing the liquid level, destroying the surface tension and forming a Taylor cone, but also can continuously provide spinning solution or melt for the top of the needle point in the spinning process. The multi-needle-point group 5 consists of array needle points and a base; the vibration generator 1 is connected with the bottom surface of the base of the multi-needle-point group 5 through an external through hole 13 and a vibration transducer 14, the vibration generator 1 drives the multi-needle-point group 5 to vibrate, and the connecting through hole is sealed by a sealing ring. The multi-needle-point group 5 is connected with a positive electrode of the power supply 7 through a lead; the roll-to-roll collecting device 8 consists of a rolling roller, an unreeling roller, an aluminum foil and a conveyor belt, is arranged right above the solution tank 4 and is grounded; the vertical distance between the multi-needle-point group 5 and the collecting plate is 5-40cm. As shown in fig. 3, the guide sleeve plate 6 is provided with 11 × 11 arrays of through holes, the diameter of which is 3mm, made of insulating material; the supporting beams are arranged on the periphery and are matched with the straight grooves preset in the solution tank 4 for fixing the guide sleeve plates 6. As shown in fig. 4, the multi-tip set 5 is composed of an 11 × 11 array of tips having a diameter of 350 μm and made of a stainless material; the array needles on the multi-needle-point group 5 respectively and correspondingly penetrate through the array through holes of the guide sleeve plate 6, so that overlarge deviation caused by large length-diameter ratio and poor rigidity of the needle points is avoided, and mutual interference among the needle points is avoided. An electrostatic field is formed between the multi-needle-point group 5 and the roll-to-roll collecting device 8, the vibrating multi-needle-point group 5 pierces the surface of the solution to destroy the surface tension of the solution, a plurality of taylor cones are induced at the needle point under the action of the high electrostatic field at the needle point tip to form a plurality of jet flows, and the jet flows to the roll-to-roll collecting device 8 to be deposited on an aluminum foil. In the spinning process, large-area and continuous fiber membrane preparation can be realized along with the movement of the conveyor belt.
Example 2:
similar to example 1, the difference is that:
as shown in fig. 5, in the present embodiment, the base of the multi-tip group is circular, and the tips are distributed in a circular array on the circular base. The hole distribution mode of the guide sleeve plate corresponds to the distribution mode of the needle points.
Example 3:
similar to example 1, the difference is that:
as shown in fig. 6 and 7, in the present embodiment, the multi-tip group 5 is composed of a plurality of independent tip groups, each tip group is driven by independent vibration generators 1-1, 1-2, 1-3 \8230and1-n, and each vibration generator may vibrate synchronously or asynchronously. The hole distribution mode of the guide sleeve plate 6 corresponds to the distribution mode of the needle points.
Claims (6)
1. The vibrating multi-needle-tip electrostatic spinning device is characterized by being provided with a power supply, a solution tank, a liquid supply device, a multi-needle-tip group, a guide sleeve plate, a telescopic rod, a collecting device, a vibration generator, a heating block, a guide pipe and a vibration transducer; the solution tank is provided with a liquid inlet interface, a liquid outlet interface and an external through hole; the liquid supply device is connected with the solution tank through a liquid inlet interface of the solution tank and a conduit; the vibration generator is connected with the bottom surface of the base of the multi-needle-point group through an external through hole of the solution tank and the vibration transducer, and the external through hole is sealed by a sealing ring; the bottom surface of the multi-needle-point group is connected with the top of the telescopic rod; the bottom of the telescopic rod is fixedly connected to the bottom surface of the solution tank; the heating blocks are uniformly distributed in the solution tank and used for heating the melt in the melt electrospinning; the multi-needle-point group is connected with a power supply through a lead; the collecting device is arranged right above the solution tank; the symmetry axes of the multi-needle-tip group, the guide sleeve plate and the vibration shaft of the vibration transducer are mutually overlapped;
the liquid inlet interface is arranged at the top of the solution tank; the vibration frequency of the vibration generator is 0.1Hz to 20kHz, and the amplitude is 0.001 to 50mm; the vibration generator is connected with the external through hole for connecting the multi-needle-point group and the vibration transducer for sealing treatment; the multi-tip set is made of a conductive material.
2. The vibrating multi-tip electrospinning device of claim 1, wherein the solution tank is an open type insulating plastic solution tank.
3. The vibratory multi-tip electrospinning device of claim 1, wherein the telescoping rods are distributed below the multi-tip set.
4. The vibratory multi-nib electrospinning apparatus of claim 1, wherein the guide sleeve plate has through holes in the same arrangement and number as the plurality of nib groups.
5. The vibratory multi-tip electrospinning device of claim 1, wherein the arrayed tips of the multi-tip set are inserted through the arrayed through holes of the guide sleeve plate, respectively.
6. The vibratory multi-tip electrospinning device of claim 1, wherein the heating blocks are provided in at least 2 blocks, and the at least 2 heating blocks are uniformly distributed in the solution tank.
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| CN201710060156.2A CN106757423B (en) | 2017-01-24 | 2017-01-24 | Vibration multi-needle-point electrostatic spinning device |
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| CN201710060156.2A CN106757423B (en) | 2017-01-24 | 2017-01-24 | Vibration multi-needle-point electrostatic spinning device |
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Families Citing this family (6)
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| CN107201558A (en) * | 2017-06-28 | 2017-09-26 | 黄辉 | A kind of pistol formula electrostatic spinning apparatus |
| CN107557893B (en) * | 2017-08-01 | 2019-04-09 | 东华大学 | A kind of two-dimension netted superfine nano-fiber material of electrostatic direct-injection and preparation method thereof |
| CN108532005B (en) * | 2018-05-10 | 2023-06-16 | 南通纺织丝绸产业技术研究院 | Electrostatic spinning method for preparing nanofibers in batches through electrostatic spinning device |
| CN111118620B (en) * | 2019-12-30 | 2021-12-21 | 东华大学 | Saturated micro-liquid-level solid needle array spinning device and using method thereof |
| CN111229489B (en) * | 2020-01-13 | 2021-07-06 | 厦门大学 | High-frequency core-shell structure micro-droplet injection device |
| CN115467033B (en) * | 2022-09-19 | 2023-10-31 | 魏桥纺织股份有限公司 | Telescopic carrier liquid needleless electrostatic spinning device |
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| KR100578764B1 (en) * | 2004-03-23 | 2006-05-11 | 김학용 | A bottom-up electrospinning devices, and nanofibers prepared by using the same |
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| CN104963007B (en) * | 2015-06-19 | 2019-03-01 | 南通百博丝纳米科技有限公司 | A kind of production nano-fiber spinning device |
| CN205035507U (en) * | 2015-10-09 | 2016-02-17 | 厦门大学 | Array needle point electrostatic spinning device is assisted to supersound |
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| CN102212892A (en) * | 2011-06-08 | 2011-10-12 | 东华大学 | Ultrasonic oscillation electrostatic spinning nozzle and method |
| CN202099422U (en) * | 2011-06-08 | 2012-01-04 | 东华大学 | Ultrasonic oscillation electrostatic spinning nozzle |
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Address after: No. 360, floor 5, Taocheng Town, Taode District, Fujian Province Patentee after: Fujian Weinasi Intelligent Manufacturing Technology Co.,Ltd. Address before: No. 360, floor 5, Taocheng Town, Taode District, Fujian Province Patentee before: Fujian Huanlai Technology Co.,Ltd. |
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