CN103541026A - Electrostatic spinning system with auxiliary electrode and electrostatic spinning method - Google Patents
Electrostatic spinning system with auxiliary electrode and electrostatic spinning method Download PDFInfo
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- CN103541026A CN103541026A CN201310488427.6A CN201310488427A CN103541026A CN 103541026 A CN103541026 A CN 103541026A CN 201310488427 A CN201310488427 A CN 201310488427A CN 103541026 A CN103541026 A CN 103541026A
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Abstract
The invention discloses an electrostatic spinning system with an auxiliary electrode. The system comprises a barrel, a nozzle, a first high-voltage power source, a receiving device, a second high-voltage power source, the auxiliary electrode, and a movement control device. The nozzle and the auxiliary electrode locate above and below the receiving device respectively. The nozzle is immobilized. The auxiliary electrode can move under control of the movement control device. The first high-voltage power source is used for producing a first voltage difference V1 between the receiving device and the barrel. The second high-voltage power source is used for producing a second voltage difference V2 between the receiving device and the auxiliary electrode. A voltage difference between the barrel and the auxiliary electrode is the sum of the V1 and V2. Correspondingly, the invention further provides an electrostatic spinning method using the electrostatic spinning system with the auxiliary electrode. With the moving auxiliary electrode, the nano-fiber jetted during electrostatic spinning can deposit into corresponding patterns according to the moving path of the auxiliary electrode.
Description
Technical field
The invention belongs to electrostatic spinning field, be specifically related to a kind of electrostatic spinning system and electrospinning process with auxiliary electrode.
Background technology
Method of electrostatic spinning is a kind of method of high-efficiency production of nano fiber, its manufacturing installation is simple, spinning is with low cost, it is more to be used for the substance classes of electrospinning, and in spinning process, can control fiber pattern parameter by changing the spinning techniques such as spinning voltage, spinning solution flow velocity, Electrospun distance, solution concentration.
The operation principle of method of electrostatic spinning is, in Electrospun process, to have filled polymer solution or the fused solution of charging in injection apparatus.Between receiving device and nozzle, there is extra electric field, under DC Electric Field, be subject to surface tension effects and remain on the macromolecule drop at nozzle place, at electric field induction lower surface, assemble electric charge, be subject to an electric field force with surface tension opposite direction.When electric field strengthens gradually, the drop at nozzle place is elongated as taper by spherical, forms taylor cone.And when electric-field intensity is increased to a critical value, electric field force will overcome the surface tension of liquid, liquid sprays from taylor cone.There is concussion and shakiness in injection stream, the scrambling screw that produces very high frequency under the effect of high electric field.In shaking at a high speed, injection stream is by drawing-down rapidly, and solvent is volatilization rapidly also, finally forms diameter at nano level fiber, and is scattered on gathering-device in random mode, forms nonwoven fabric.
The nanofiber that existing electrostatic spinning obtains exists with nonwoven fabric form, and fiber alignment is very in disorder, and this has caused many difficulties to some practical applications.
Summary of the invention
The object of the invention is to solve the prepared not high problem of the nanofiber degree of order of current electrostatic spinning.
For achieving the above object, the invention provides a kind of electrostatic spinning system with auxiliary electrode, comprise barrel, nozzle, the first high voltage source, receiving device, the second high voltage source, 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 the above and below of described receiving device; Described nozzle maintains static, and described auxiliary electrode can move under the control of described mobile controller; Described the first high voltage source for forming the first voltage difference that difference is V1 between receiving device and described barrel, the second high voltage source is that the second voltage of V2 is poor for form difference 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, in described mobile controller, preset 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 under receiving device.
Preferably, the distance range of described auxiliary electrode and described receiving device is 5-10cm.
Preferably, described receiving device is connected to earth potential; Described the first high voltage source is connected between described barrel and described receiving device, and described the second high voltage source is connected between described receiving device and described auxiliary electrode.
Preferably, the poor difference range of described second voltage 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 a kind of electrospinning process of applying above-mentioned electrostatic spinning system, and described the first high voltage source applies the first voltage difference that difference is V1 between described barrel and described receiving device; When the molten melt drop in described shower nozzle descends distortion spouting under the electric field action of the first voltage difference, it is that the second voltage of V2 is poor that described the second high voltage source applies difference between described auxiliary electrode and described receiving device, makes to form between barrel and auxiliary electrode the voltage difference that difference is V1 and V2 sum; Open described mobile controller, control described auxiliary electrode and move according to default mobile route, on described receiving device, form the nanofiber identical with described mobile route pattern.
The electrostatic spinning system with auxiliary electrode of the present invention, compared with prior art has following advantages:
Electrostatic spinning system of the present invention, only need the below of receiving device that movably auxiliary electrode is set, when textile fabric, on auxiliary electrode, apply high pressure, change the electric field location between spinning nozzle and auxiliary electrode, thereby the spinning that makes to eject can drop on the diverse location of receiving device, makes institute's spinning nano fibre have the very high degree of order.And, make nanofiber that static weaving sprays be deposited as corresponding pattern according to the mobile route of auxiliary electrode movably.
In addition, electrostatic spinning system of the present invention, on the basis of existing apparatus, only need to increase a mobile controller and high voltage source, for auxiliary electrode provides high pressure and mobile driving, does not need complicated auxiliary equipment, has larger using value.On the other hand, adopt two high voltage sourcies to provide high pressure between barrel and auxiliary electrode, can reduce the high voltage source cost of electrostatic spinning system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram with the electrostatic spinning system of auxiliary electrode of the present invention;
Fig. 2 is that auxiliary electrode of the present invention is at the schematic diagram of 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 with the nanofiber that electrostatic spinning system is weaved of auxiliary electrode of the present invention;
3 D stereo schematic diagram when Fig. 5 is the electrostatic spinning system weaving nanofiber with auxiliary electrode of the present invention;
Fig. 6 is the electrostatic spinning system with the auxiliary electrode of the present invention double-layer nanometer fiber schematic diagram of being weaved.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with electrostatic spinning system specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.In addition, the direction term of mentioning in following examples, such as " on ", D score, 'fornt', 'back', " left side ", " right side " etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is to be not used for limiting the present invention for illustrating.
The invention provides a kind of electrostatic spinning system with auxiliary electrode, can solve the prepared not high problem of the nanofiber degree of order of current electrostatic spinning.
As shown in Figure 1, the electrostatic spinning system with auxiliary electrode of the present invention, comprises barrel 0, nozzle 1, the first high voltage source 2, receiving device 3, the second high voltage source 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 the above and below of receiving device 6, and nozzle 0 maintains static, and auxiliary electrode can move under the control of mobile controller 6.The first high voltage source 2 for forming difference for the first voltage difference of poor V1 between receiving device 3 and barrel 0, the second high voltage source 4 is connected to and between receiving device and auxiliary electrode, forms difference is that the second voltage of V2 is poor, and making the voltage difference between barrel 0 and auxiliary electrode 5 is V1 and V2 sum.
The above and below that nozzle 0 described in the present invention and auxiliary electrode 5 lay respectively at described receiving device 3, be interpreted as, nozzle and auxiliary electrode lay respectively at the relative both sides of receiving device, and nozzle face is to the bottom of receiving device and auxiliary electrode towards the straight-line pass receiving device between the top of receiving device.
Due to the second high-pressure installation 4, between auxiliary electrode 5 and receiving device 3, to have applied second voltage poor, make the voltage difference between barrel 0 and auxiliary electrode 5 be greater than the voltage difference between barrel 0 and receiving device, therefore, by mobile auxiliary electrode 5, make the random coil motion of injection stream microcosmic in macroscopic view, show the property set, along with the movement of auxiliary electrode 5, the nanofiber spraying in nozzle can be deposited as and the corresponding pattern of mobile route according to the mobile route of auxiliary electrode 5.For example, can design some plane patterns, even can design the spinning structure of some 3 D stereos.
Preferably, auxiliary electrode 5 moves in a plane.This plane is preferably parallel with the upper surface of receiving device, and for example auxiliary electrode can move in the surface parallel with receiving device upper surface.As shown in Figure 2, auxiliary electrode 5 can move up in horizontal x and longitudinal y side of a plane.By controlling horizontal x and longitudinal y, can make auxiliary electrode 5 move arbitrarily in the plane.The moving range of auxiliary electrode 5 is no more than the size range of receiving device 3, preferred, and the mobile range of auxiliary electrode 5 is under receiving device, and auxiliary electrode is in the projection of receiving device lower surface all the time on the lower surface at receiving device.
In mobile controller 6, can preset the mobile route of auxiliary electrode 5, auxiliary electrode is moved in the path of setting.The mobile route of auxiliary electrode 5 can be the path shapes such as linear, snakelike, spirality.
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, by mobile receiving device 3 or auxiliary electrode 5, regulate the distance of auxiliary electrode 5 and receiving device 3, and the distance of nozzle 1 and receiving device 3, can spin easily like this nanofiber of three-dimensional structure.Moving up and down also of auxiliary electrode 5 can be controlled by mobile controller.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.
The size of auxiliary electrode 5 towards the tip size of receiving device 3 much smaller than receiving device 3, preferred, the end shape of auxiliary electrode 5 can be the shapes such as cylindrical, prismatic, needle point shape, preferred, 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, is preferably stainless steel material.
Receiving device 3 is for being generally the thin-walled flat board of insulating materials.Receiving device 3 can be connected to ground, the first high voltage source 2 is connected between barrel 0 and receiving device 3, the second high voltage source 4 is connected between receiving device 3 and auxiliary electrode 5, receiving device 3 ground connection, by the output of the first high voltage source 2 and the second high voltage source is set, can to make the voltage difference between barrel and auxiliary electrode be V1 and V2 sum.
The poor difference (V1 and V2) of the first voltage difference and second voltage can be set as required.Preferably, the scope of the value V2 that second voltage is poor is 10-30KV, is preferably 10KV.The value V1 of the first voltage difference is preferably 10KV.For example, the first high voltage source applies the voltage difference (V1=10KV) of 10KV between barrel 0 and receiving device 3, the voltage difference (V2=10KV) of apply between receiving device and auxiliary electrode-10KV of the second high voltage source, the voltage difference forming between barrel and auxiliary electrode is 20KV.
In the present invention, mobile controller 6 can be for being set with the computer of mobile route.The first high-pressure installation and the second high-pressure installation can be high voltage source.Shower nozzle 1 can adopt Metallic Nozzle At The Ingot.
Accordingly, the present invention also provides a kind of electrospinning process based on above-mentioned electrostatic spinning system, and the first high voltage source 2 applies the first high pressure that voltage value is V1 between barrel 0 and receiving device 3; Molten melt drop in shower nozzle 1 is out of shape when spouting under the electric field action of the first voltage difference, it is that the second voltage of V2 is poor that the second high voltage source 4 applies difference between auxiliary electrode 5 and receiving device 3, makes to form between barrel 0 and auxiliary electrode the voltage difference that difference is V1 and V2 sum; Open mobile control module 6, control auxiliary electrode 5 and move according to default mobile route, on receiving device 3, form the nanofiber identical with described mobile route pattern.
Below in conjunction with accompanying drawing, introduce the course of work that the present invention has the electrostatic spinning system of auxiliary electrode.The upper surface of receiving device 3 is horizontal plane, and earthing potential, referring to Fig. 1.First will the preset temperature of barrel 0 heating for the treatment of spinning poly compound be housed, then open the first high voltage source 2 and between barrel 0 and receiving device 3, apply the first high pressure that voltage value is V1, until that the molten melt drop in shower nozzle 1 is out of shape under the first high-voltage field is then spouting, now open again the second high voltage source 4, between auxiliary electrode 5 and receiving device 3, applying voltage value is the second high pressure of V2, and open mobile control module 6, control auxiliary electrode 5 and from A position, move to B position according to serpentine path default in Fig. 3.In this process, the high voltage electric field that the nanofiber that shower nozzle 1 ejects can be discharged by auxiliary electrode 5 attracts, thereby changes direction along 5 mobile routes of auxiliary electrode, finally the nanofiber pattern of formation rule on receiving device 3.As shown in Figure 4, the nanofiber pattern receiving on receiving device 3 is identical with the mobile route of auxiliary electrode 5.
3 D stereo schematic diagram when as shown in Figure 5, the electrostatic spinning system with removable auxiliary electrode of the present invention is weaved nanofiber.The mobile route that changes auxiliary electrode 5 by mobile controller 6, the three-dimensional fibre structure of can weaving, as shown in Figure 6, is the two-layer nanofibrous structures of having weaved, while weaving two-layer nanofibrous structures, the mobile route of auxiliary electrode is different.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. an electrostatic spinning system with auxiliary electrode, is characterized in that, this electrostatic spinning system comprises barrel, nozzle, the first high voltage source, receiving device, the second high voltage source, 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 the above and below of described receiving device;
Described nozzle maintains static, and described auxiliary electrode can move under the control of described mobile controller;
Described the first high voltage source for forming the first voltage difference that difference is V1 between receiving device and described barrel, the second high voltage source is that the second voltage of V2 is poor for form difference 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, is characterized in that, described auxiliary electrode moves in a plane.
3. electrostatic spinning system according to claim 2, is characterized in that, described plane is parallel with the upper surface of described receiving device.
4. according to the electrostatic spinning system described in claim 1-3 any one, it is characterized in that, in described mobile controller, preset the mobile route of described auxiliary electrode.
5. electrostatic spinning system according to claim 4, is characterized in that, described mobile route is linear, snakelike or spirality path.
6. according to the electrostatic spinning system described in claim 1-5 any one, it is characterized in that, the mobile range of described auxiliary electrode is under receiving device.
7. according to the electrostatic spinning system described in claim 1-5 any one, it is characterized in that, the distance range of described auxiliary electrode and described receiving device is 5-10cm.
8. according to the electrostatic spinning system described in claim 1-7 any one, it is characterized in that, described receiving device is connected to earth potential; Described the first high voltage source is connected between described barrel and described receiving device, and described the second high voltage source is connected between described receiving device and described auxiliary electrode.
9. according to the electrostatic spinning system described in claim 1-8 any one, it is characterized in that, the poor difference range of described second voltage is 10-30KV.
10. according to the electrostatic spinning system described in claim 1-9 any one, it is characterized 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 claim 1-10 any one, it is characterized in that, described auxiliary electrode and/or described receiving device can also move up and down.
Described in 12. 1 kinds of application rights requirement 1-11 any one, the electrospinning process of electrostatic spinning system, is characterized in that, described the first high voltage source applies the first voltage difference that difference is V1 between described barrel and described receiving device; When the molten melt drop in described shower nozzle descends distortion spouting under the electric field action of the first voltage difference, it is that the second voltage of V2 is poor that described the second high voltage source applies difference between described auxiliary electrode and described receiving device, makes to form between barrel and auxiliary electrode the voltage difference that difference is V1 and V2 sum; Open described mobile controller, control described auxiliary electrode and move according to default mobile route, on described receiving device, form the nanofiber identical with described mobile route pattern.
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| CN105401230A (en) * | 2014-09-04 | 2016-03-16 | 株式会社东芝 | Nanofiber Producing Apparatus And Method Of Producing Nanofibers |
| CN106498514A (en) * | 2017-01-05 | 2017-03-15 | 大连理工大学 | A kind of electrospinning process for preparing orientated nano fibers |
| CN107429428A (en) * | 2016-03-17 | 2017-12-01 | 株式会社东芝 | Nozzle head module and electrospinning device |
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