CN103541026B - A kind of electrostatic spinning system with auxiliary electrode and electrospinning process - Google Patents
A kind of electrostatic spinning system with auxiliary electrode and electrospinning process Download PDFInfo
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- CN103541026B CN103541026B CN201310488427.6A CN201310488427A CN103541026B CN 103541026 B CN103541026 B CN 103541026B CN 201310488427 A CN201310488427 A CN 201310488427A CN 103541026 B CN103541026 B CN 103541026B
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Abstract
The invention discloses a kind of electrostatic spinning system with auxiliary electrode, including barrel, nozzle, the first high voltage power supply, receiving device, the second high voltage power supply, auxiliary electrode and mobile controller, wherein, nozzle and auxiliary electrode lay respectively at above and below receiving device；Nozzle maintains static, and auxiliary electrode can move under the control of mobile controller；First high voltage power supply for forming the first voltage difference that difference is V1 between receiving device and barrel, second high voltage power supply for forming the second voltage difference that difference is V2 between receiving device and auxiliary electrode, and making the voltage difference between barrel and auxiliary electrode is V1 and V2 sum.Accordingly, the electrospinning process that a kind of application has the electrostatic spinning system of auxiliary electrode is also provided for.The present invention by arranging moveable auxiliary electrode, when enabling electrostatic to weave injection nanofiber deposit into corresponding pattern according to the mobile route of auxiliary electrode.
Description
Technical field
The invention belongs to electrostatic spinning field, be specifically related to a kind of electrostatic spinning system with auxiliary electrode and electrospinning process.
Background technology
Method of electrostatic spinning is a kind of method of high-efficiency production of nano fiber, it is simple that it manufactures device, spinning is with low cost, can be used to the substance classes of electrospinning more, and in spinning process, can pass through to change the spinning techniques such as spinning voltage, spinning liquid flow velocity, Electrospun distance, solution concentration and control fiber morphology parameter.
The operation principle of method of electrostatic spinning is, in electro-spinning process, becomes loaded with polymer solution or the fused solution of charging in injection apparatus.There is extra electric field between receiving device and nozzle, under DC Electric Field, be maintained at the macromolecule drop at nozzle place by surface tension effects, induce lower surface to assemble electric charge at electric field, be subject to an electric field force in opposite direction with surface tension.When electric field strengthens gradually, the drop at nozzle place is elongated as taper, formation taylor cone by spherical.And when electric field intensity increases to a marginal value, electric field force will overcome the surface tension of liquid, and liquid sprays from taylor cone.Injection stream under the effect of high electric field occur concussion and unstable, generation very high frequency scrambling screw.In concussion at a high speed, injection stream is drawn and attenuated rapidly, and solvent also volatilizees rapidly, ultimately forms diameter at nano level fiber, and is scattered in a random way on collection device, forms non-woven fabrics.
The nanofiber that existing electrostatic spinning obtains exists with non-woven fabrics form, and fiber alignment is very in disorder, and some practical applications are caused many difficulties by this.
Summary of the invention
It is an object of the invention to solve the problem that the nanofiber degree of order prepared by current electrostatic spinning is not high.
For achieving the above object, the invention provides a kind of electrostatic spinning system with auxiliary electrode, including barrel, nozzle, the first high voltage power supply, receiving device, the second high voltage power supply, auxiliary electrode and mobile controller, wherein, described nozzle is connected to described barrel lower end, and described nozzle and described auxiliary electrode lay respectively at above and below described receiving device；Described nozzle maintains static, and described auxiliary electrode can move under the control of described mobile controller；Described first high voltage power supply for forming the first voltage difference that difference is V1 between receiving device and described barrel, second high voltage power supply for forming the second voltage difference that difference is V2 between receiving device and auxiliary electrode, and making the voltage difference between barrel and auxiliary electrode is V1 and V2 sum.
Preferably, described auxiliary electrode moves in a plane.
Preferably, described plane is parallel with the upper surface of described receiving device.
Preferably, described mobile controller is preset with the mobile route of described auxiliary electrode.
Preferably, described mobile route is linear, snakelike or spirality path.
Preferably, the mobile range of described auxiliary electrode is in the underface of receiving device.
Preferably, described auxiliary electrode is 5-10cm with the distance range of described receiving device.
Preferably, described receiving device is connected to the ground current potential；Described first high voltage power supply is connected between described barrel and described receiving device, and described second high voltage power supply is connected between described receiving device and described auxiliary electrode.
Preferably, the difference range of described second voltage difference is 10-30KV.
Preferably, the end shape of described auxiliary electrode is cylindrical, prismatic or needle point shape.
Preferably, auxiliary electrode and/or receiving device can also move up and down.
Accordingly, the present invention also provides for a kind of electrospinning process applying above-mentioned electrostatic spinning system, and described first high voltage power supply applies the first voltage difference that difference is V1 between described barrel and described receiving device；When molten melt drop in described nozzle deforms spouting down under the electric field action of the first voltage difference, described second high voltage power supply applies the second voltage difference that difference is V2 between described auxiliary electrode and described receiving device, makes to form the voltage difference that difference is V1 and V2 sum between barrel and auxiliary electrode；Open described mobile controller, control described auxiliary electrode and move according to default mobile route, described receiving device is formed the nanofiber identical with described mobile route pattern.
The electrostatic spinning system with auxiliary electrode of the present invention, compared with prior art has the advantage that
The electrostatic spinning system of the present invention, what have only to receiving device is arranged below moveable auxiliary electrode, when textile fabric, auxiliary electrode applies high pressure, change the electric field location between spinning-nozzle and auxiliary electrode, so that the spinning ejected can drop on the diverse location of receiving device, institute's spinning nano fibre is made to have the significantly high degree of order.And, enable the nanofiber of electrostatic weaving injection to deposit into corresponding pattern according to the mobile route of moveable auxiliary electrode.
It addition, the electrostatic spinning system of the present invention, on the basis of existing apparatus, it is only necessary to increase a mobile controller and high voltage power supply, provide high pressure and mobile driving for auxiliary electrode, it is not necessary to complicated auxiliary equipment, there is bigger using value.On the other hand, two high voltage power supplies are adopted to provide high pressure between barrel and auxiliary electrode, it is possible to reduce the high voltage power supply cost of electrostatic spinning system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the electrostatic spinning system with auxiliary electrode of the present invention；
Fig. 2 is the auxiliary electrode of the present invention schematic diagram a planar movement mode；
Fig. 3 is the schematic diagram of the mobile route of auxiliary electrode of the present invention；
Fig. 4 is the schematic diagram of the weaved nanofiber of electrostatic spinning system with auxiliary electrode of the present invention；
Fig. 5 is the 3 D stereo schematic diagram during electrostatic spinning system weaving nanofiber with auxiliary electrode of the present invention；
Fig. 6 is weaved double-layer nanometer fiber schematic diagram by the electrostatic spinning system with auxiliary electrode of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with electrostatic spinning system specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.Additionally, the direction term mentioned in following example, for instance " on ", D score, "front", "rear", "left", "right" etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is used to illustrate not for limiting the present invention.
The invention provides a kind of electrostatic spinning system with auxiliary electrode, it is possible to solve the problem that the nanofiber degree of order prepared by current electrostatic spinning is not high.
As it is shown in figure 1, the electrostatic spinning system with auxiliary electrode of the present invention, including barrel 0, nozzle the 1, first high voltage power supply 2, receiving device the 3, second high voltage power supply 4, auxiliary electrode 5 and mobile controller 6.Wherein, nozzle 1 is connected to barrel 0 lower end, and nozzle 1 and auxiliary electrode 5 lay respectively at above and below receiving device 6, and nozzle 0 maintains static, and auxiliary electrode can move under the control of mobile controller 6.First high voltage power supply 2 for forming the first voltage difference that difference is difference V1 between receiving device 3 and barrel 0, second high voltage power supply 4 is connected between receiving device and auxiliary electrode and forms the second voltage difference that difference is V2, and making the voltage difference between barrel 0 and auxiliary electrode 5 is V1 and V2 sum.
Heretofore described nozzle 0 lays respectively at above and below described receiving device 3 with auxiliary electrode 5, it is interpreted as, nozzle and auxiliary electrode lay respectively at the opposite sides of receiving device, and nozzle is towards the bottom of receiving device and auxiliary electrode towards the straight-line pass receiving device between the top of receiving device.
Owing to the second high tension unit 4 is applied with the second voltage difference between auxiliary electrode 5 and receiving device 3, make the voltage difference between barrel 0 and auxiliary electrode 5 more than the voltage difference between barrel 0 and receiving device, therefore, the random coil motion being made injection stream microcosmic by mobile auxiliary electrode 5 is macroscopically showing setting property, along with the movement of auxiliary electrode 5, the nanofiber of injection in nozzle is enable to deposit into pattern corresponding with mobile route according to the mobile route of auxiliary electrode 5.For example, it is possible to design some plane patterns, the spun structure of some 3 D stereos even can be designed.
Preferably, auxiliary electrode 5 moves in a plane.This plane is preferably parallel with the upper surface of receiving device, for instance auxiliary electrode can move in the surface parallel with receiving device upper surface.As in figure 2 it is shown, auxiliary electrode 5 can move up at the horizontal x of a plane and longitudinal y side.By controlling horizontal x and longitudinal y, it is possible to make auxiliary electrode 5 arbitrarily mobile in the plane.The moving range of auxiliary electrode 5 is less than the size range of receiving device 3, it is preferred that the mobile range of auxiliary electrode 5 in the underface of receiving device, namely auxiliary electrode in the projection of receiving device lower surface all the time on the lower surface of receiving device.
Mobile controller 6 can be preset with the mobile route of auxiliary electrode 5, make auxiliary electrode move in the path set.The mobile route of auxiliary electrode 5 can be the path shape such as linear, snakelike, spiral type.
Preferably, auxiliary electrode 5 is 5-10cm with the distance range of receiving device 3.In other embodiments of the invention, auxiliary electrode 5 and/or receiving device 3 can move up and down, the distance of auxiliary electrode 5 and receiving device 3 is regulated by mobile receiving device 3 or auxiliary electrode 5, and the distance of nozzle 1 and receiving device 3, so can spin the nanofiber of three dimensional structure easily.Moving up and down of auxiliary electrode 5 can also by mobile controller control.Preferably, the distance range that auxiliary electrode 5 moves up and down is 1-5mm；Receiving device 3 can be finely tuned up and down.
Auxiliary electrode 5 towards the tip size of receiving device 3 much smaller than the size of receiving device 3, it is preferred that the end shape of auxiliary electrode 5 can be the shapes such as cylindrical, prismatic, needle point shape, it is preferred that the end shape of auxiliary electrode 5 is needle point shape.The material of auxiliary electrode 5 has no special requirements, and is generally metal material, it is preferred to stainless steel material.
Receiving device 3 is the thin-walled flat board being generally insulant.Receiving device 3 can be connected to the ground, first high voltage power supply 2 is connected between barrel 0 and receiving device 3, second high voltage power supply 4 is connected between receiving device 3 and auxiliary electrode 5, receiving device 3 ground connection, can make the voltage difference between barrel and auxiliary electrode be V1 and V2 sum by arranging the output of the first high voltage power supply 2 and the second high voltage power supply.
The difference (V1 and V2) of the first voltage difference and the second voltage difference can be set as required.Preferably, the value V2 of the second voltage difference range for 10-30KV, it is preferred to 10KV.The value V1 of the first voltage difference is preferably 10KV.Such as, first high voltage power supply applies the voltage difference (V1=10KV) of 10KV between barrel 0 and receiving device 3, second high voltage power supply applies the voltage difference (V2=10KV) of-10KV between receiving device and auxiliary electrode, and the voltage difference formed between barrel and auxiliary electrode is 20KV.
In the present invention, mobile controller 6 can be the computer being set with mobile route.First high tension unit and the second high tension unit can be high voltage power supply.Nozzle 1 can adopt metallic nozzle.
Accordingly, the present invention also provides for a kind of electrospinning process based on above-mentioned electrostatic spinning system, and the first high voltage power supply 2 applies the first high pressure that magnitude of voltage is V1 between barrel 0 and receiving device 3；When molten melt drop in nozzle 1 deforms spouting under the electric field action of the first voltage difference, second high voltage power supply 4 applies the second voltage difference that difference is V2 between auxiliary electrode 5 and receiving device 3, makes to form the voltage difference that difference is V1 and V2 sum between barrel 0 and auxiliary electrode；Opening the mobile module 6 that controls, control auxiliary electrode 5 moves according to default mobile route, forms the nanofiber identical with described mobile route pattern on receiving device 3.
The work process that the present invention has the electrostatic spinning system of auxiliary electrode is introduced below in conjunction with accompanying drawing.The upper surface of receiving device 3 is horizontal plane, and earthing potential, referring to Fig. 1.First will be equipped with treating the preset temperature of barrel 0 heating of spinning polymer, then open the first high voltage power supply 2 between barrel 0 and receiving device 3, apply the first high pressure that magnitude of voltage is V1, until the molten melt drop in nozzle 1 deforms then spouting under the first high-voltage field, now open the second high voltage power supply 4 again, the second high pressure that magnitude of voltage is V2 is applied between auxiliary electrode 5 and receiving device 3, and open the mobile module 6 that controls, control auxiliary electrode 5 moves to B location from location A according to the serpentine path preset in Fig. 3.In this process, the high voltage electric field that the nanofiber that nozzle 1 ejects can be discharged by auxiliary electrode 5 attracts, thus changing direction along 5 mobile routes of auxiliary electrode, and the finally nanofiber pattern of formation rule on receiving device 3.As shown in Figure 4, nanofiber pattern receiving device 3 received is identical with the mobile route of auxiliary electrode 5.
As it is shown in figure 5, of the present invention there is removable auxiliary electrode electrostatic spinning system weaving nanofiber time 3 D stereo schematic diagram.Being changed the mobile route of auxiliary electrode 5 by mobile controller 6, it is possible to weaving dimensional fibre structure, as shown in Figure 6, for the nanofibrous structures of two-layer of having weaved, during weaving two-layer nanofibrous structures, the mobile route of auxiliary electrode is different.
Particular embodiments described above; the purpose of the present invention, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only specific embodiments of the invention; it is not limited to the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (12)
1. an electrostatic spinning system with auxiliary electrode, it is characterised in that this electrostatic spinning system includes barrel, nozzle, the first high voltage power supply, receiving device, the second high voltage power supply, auxiliary electrode and mobile controller, wherein,
Described nozzle is connected to described barrel lower end, and described nozzle and described auxiliary electrode lay respectively at above and below described receiving device；
Described nozzle maintains static, and described auxiliary electrode can move under the control of described mobile controller；
Described first high voltage power supply for forming the first voltage difference that difference is V1 between receiving device and described barrel, second high voltage power supply for forming the second voltage difference that difference is V2 between receiving device and auxiliary electrode, and making the voltage difference between barrel and auxiliary electrode is V1 and V2 sum.
2. electrostatic spinning system according to claim 1, it is characterised in that described auxiliary electrode moves in a plane.
3. electrostatic spinning system according to claim 2, it is characterised in that described plane is parallel with the upper surface of described receiving device.
4. electrostatic spinning system according to claim 1, it is characterised in that be preset with the mobile route of described auxiliary electrode in described mobile controller.
5. electrostatic spinning system according to claim 4, it is characterised in that described mobile route is linear, snakelike or spirality path.
6. the electrostatic spinning system according to any one of claim 1-5, it is characterised in that the mobile range of described auxiliary electrode is in the underface of receiving device.
7. the electrostatic spinning system according to any one of claim 1-5, it is characterised in that the distance range of described auxiliary electrode and described receiving device is 5-10cm.
8. the electrostatic spinning system according to any one of claim 1-5, it is characterised in that described receiving device is connected to the ground current potential；Described first high voltage power supply is connected between described barrel and described receiving device, and described second high voltage power supply is connected between described receiving device and described auxiliary electrode.
9. the electrostatic spinning system according to any one of claim 1-5, it is characterised in that the difference range of described second voltage difference is 10-30KV.
10. the electrostatic spinning system according to any one of claim 1-5, it is characterised in that the end shape of described auxiliary electrode is cylindrical, prismatic or needle point shape.
11. according to the electrostatic spinning system described in any one of claim 1-5, it is characterised in that described auxiliary electrode and/or described receiving device can also move up and down.
12. one kind is applied the electrospinning process of electrostatic spinning system described in any one of claim 1-11, it is characterised in that described first high voltage power supply applies the first voltage difference that difference is V1 between described barrel and described receiving device；When molten melt drop in described nozzle deforms spouting under the electric field action of the first voltage difference, described second high voltage power supply applies the second voltage difference that difference is V2 between described auxiliary electrode and described receiving device, makes to form the voltage difference that difference is V1 and V2 sum between barrel and auxiliary electrode；Open described mobile controller, control described auxiliary electrode and move according to default mobile route, described receiving device is formed the nanofiber identical with described mobile route pattern.
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| CN103993376B (en) * | 2014-04-30 | 2017-06-06 | 苏州大学 | A kind of electrostatic spinning apparatus for preparing bundles of nanofibers |
| JP6166703B2 (en) * | 2014-09-04 | 2017-07-19 | 株式会社東芝 | Nanofiber manufacturing apparatus and nanofiber manufacturing method |
| JP6427518B2 (en) * | 2016-03-17 | 2018-11-21 | 株式会社東芝 | Nozzle head module and electrospinning apparatus |
| CN106498514B (en) * | 2017-01-05 | 2018-07-13 | 大连理工大学 | A kind of electrospinning process preparing orientated nano fibers |
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| CN101302673A (en) * | 2008-05-22 | 2008-11-12 | 西安工程大学 | Electrostatic spinning nano-fibre yarn system and preparation of nano-fiber yarn |
| CN101559243A (en) * | 2008-04-18 | 2009-10-21 | 中国科学院上海硅酸盐研究所 | Preparation method of tubular electrospinning fibre material |
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| CN203583022U (en) * | 2013-10-17 | 2014-05-07 | 国家纳米科学中心 | Electrostatic spinning system with auxiliary electrode |
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| CN101559243A (en) * | 2008-04-18 | 2009-10-21 | 中国科学院上海硅酸盐研究所 | Preparation method of tubular electrospinning fibre material |
| CN101302673A (en) * | 2008-05-22 | 2008-11-12 | 西安工程大学 | Electrostatic spinning nano-fibre yarn system and preparation of nano-fiber yarn |
| CN101787623A (en) * | 2010-03-05 | 2010-07-28 | 厦门大学 | Macro preparation device of ordered nano-fibers |
| CN102443870A (en) * | 2011-09-13 | 2012-05-09 | 青岛大学 | Method for preparing ordered coaxial structural micro and nano fibers |
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