CN103147138A - Electrospinning direct-writing jet-printing device enhancing focusing function by virtue of double layers of air - Google Patents
Electrospinning direct-writing jet-printing device enhancing focusing function by virtue of double layers of air Download PDFInfo
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- CN103147138A CN103147138A CN2013100742045A CN201310074204A CN103147138A CN 103147138 A CN103147138 A CN 103147138A CN 2013100742045 A CN2013100742045 A CN 2013100742045A CN 201310074204 A CN201310074204 A CN 201310074204A CN 103147138 A CN103147138 A CN 103147138A
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- 238000001523 electrospinning Methods 0.000 title claims abstract description 24
- 238000007639 printing Methods 0.000 title claims abstract description 23
- 230000002708 enhancing effect Effects 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 19
- 238000005728 strengthening Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 10
- 239000007921 spray Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 12
- 230000005684 electric field Effects 0.000 description 7
- 239000002086 nanomaterial Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000009987 spinning Methods 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 239000002121 nanofiber Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010041 electrostatic spinning Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000008154 viscoelastic solution Substances 0.000 description 2
- 229920001410 Microfiber Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000368 destabilizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920003055 poly(ester-imide) Polymers 0.000 description 1
- 230000008844 regulatory mechanism Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
An electrospinning direct-writing jet-printing device enhancing the focusing function by virtue of double layers of air relates to an electrospinning direct-writing jet-printing device and is provided with a jet head device, air supply devices, a solution tank, a solution supply device, a high-voltage power supply and a collection plate, wherein the jet head device is provided with an outer-layer air jet nozzle, an inner-layer air jet nozzle and a solution jet nozzle; the three jet nozzles are provided with coaxial central through holes; the solution jet nozzle is arranged in the central through hole of the inner-layer air jet nozzle; the inner-layer air jet nozzle is arranged in the central through hole of the outer-layer air jet nozzle; the outer-layer air jet nozzle is provided with an air inlet; the inner-layer air jet nozzle is provided with an air inlet; the solution jet nozzle is provided with a solution inlet hole; the air inlets of the inner-layer air jet nozzle and the outer-layer air jet nozzles are connected with the air supply devices; the solution tank is arranged on the solution supply device and is communicated with the solution jet nozzle through a solution supply pipe; the anode of the high-voltage power supply is connected with the solution inlet hole of the solution jet nozzle; the cathode of the high-voltage power supply is connected with the collection plate; and the collection plate is positioned under the jet head device. The electrospinning direct-writing jet-printing device can strengthen restriction on jet flow, maintain the jet stability of the jet flow and improve the focusing effect.
Description
Technical field
The present invention relates to the electrospinning direct-writing jet printing appts, especially relate to a kind of electrospinning direct-writing jet printing appts of strengthening focusing function by double-deck gas.
Background technology
Electrospinning direct-writing based on electric liquid coupling is to utilize External Electrical Field in viscoelastic solution, and the viscoelastic solution distortion obtains taylor cone under the effect of electric field force; When electric field force continues to strengthen over solution surface tension, just there is jet to penetrate from the taylor cone point; Utilize the stability line jet to carry out the orderly spray printing preparation of micro-nano structure.Electrospinning direct-writing has overcome the electric liquid coupling of traditional electrical liquid coupling spray printing process jet spiral, crooked unsteady motion, and that utilizes that the stability line jet carries out orderly micro-nano structure directly writes preparation.Directly write jet and carry electric charge from the ejaculation of taylor cone point, be subjected to electrical charge rejection power, the effect of non-uniform electric field power will produce whip moving unstable, thereby affected the positioning accuracy of directly writing micro-nano structure.
Sheath layer gas focusing is that the jet spray printing is controlled the new development trend of research, and begins to obtain to use.Merging gas focusing and electric liquid coupling spray printing has become a kind of new mode of charged jet spray printing, has attracted researcher's extensive concern.as ([1] Wang B. such as B.Wang, Yao Y., Peng J., Lin Y., Liu W., Luo Y., Xiang R., Li R., Wu D.Preparation of poly (ester imide) ultrafine fibers by gas ?jet/electrospinning[J] .Journal of Applied Polymer Science, 2009, 114 (2): 883-891) with ([2] the Liu W. such as W.L.Liu, Yao Y., Lin Y., Wang B., Luo Y., Li N., Zhang Q., Wu Y., Niu A.Electrospinning assisted by gas jet for preparing ultrafine poly (vinyl alcohol) fibres[J] .Iranian Polymer Journal, 2009, 18 (1): 89-96) place seminar has prepared uniform PVA with the burnt gas application of sheath strata in the solution electrostatic spinning respectively, the very thin nanofiber of PEI, the burnt gas of sheath strata should be in melt electrostatic spinning effect more obvious, ([3] the Zhmayev E. such as E.Zhmayev, Cho D., Joo Y.L.Nanofibers from gas-assisted polymer melt electrospinning[J] .Polymer, 2010,51 (18): 4140-4144.) study and find that focusing gas can make the melt electrostatic spinning nanofiber diameter reduce 20 times; A.M.
Deng ([4]
A.M., Lopez-Herrera J.M., Riesco-Chueca P.The combination of electrospray and flow focusing[J] .Journal of Fluid Mechanics, 2006,566:421-445; [5]
A.M., Ferrera C., Montanero J.M.Universal size and shape of viscous capillary jets:application to gas-focused microjets[J] .Journal of Fluid Mechanics, 2011,670:427-438; [6] Li F.,
A.M., L ó pez-Herrera J.M.Absolute-convective instability transition of low permittivity, low conductivity charged viscous liquid jets under axial electric fields[J] .Physics of Fluids, 2011,23:094108) confirmed that with theoretical research the burnt gas of sheath strata has to electric liquid coupling electron spray the effect that reduces the micro-nano liquid-drop diameter, improves uniformity and spray printing efficient by experiment.
The electrospinning direct-writing technology is introduced gas focusing, mainly utilize be in laminar condition under Near Field reduce the relative velocity of spray printing process spinning jet and space medium around gas, promote the stability that jet moves; The introducing of sheath gas simultaneously, the tensile force of gas flowfield has superposeed on the basis of electric field force, reduced and kept the needed voltage magnitude that applies of jet injection, reduced the interference of jet destabilizing factor, controlling for the accurate spray printing of jet provides a kind of new technological approaches.
and carry out the jet regulatory mechanism, the replication experiment research of micro-nano structure spray printing location, explore the jet wobble amplitude, spray printing micro-nano structure size, positioning accuracy, overcome and directly write the needed critical speed of helical structure and gas flow rate, apply voltage, suitable ejecting device is carried out experimental study to ejecting device apart from waiting concerning of technological parameter rule etc. all to need a combination property to collecting board, make a kind of designing and developing of electrospinning direct-writing jet printing appts by gas reinforcement focusing function become a study hotspot, as Chinese patent ZL200710009595.7, ZL201210037687.7 has proposed different gas focusing electrospinning spray printing structures, but described in these patents, ejecting device all adopts the monofocal gas channel, be unfavorable for that gas is to the regulating and controlling effect of taylor cone and jet course of injection, all parts is still independent dispersion, need in use procedure all parts is carried out dismounting frequently, adjust, be not easy to simplification and integrated the controlling of ejecting device.
Summary of the invention
The object of the present invention is to provide to add the strong constraint jet, keep the jet jetting stability, improve a kind of electrospinning direct-writing jet printing appts of strengthening focusing function by double-deck gas of focusing effect.
The present invention is provided with ejecting device, feeder, solution tank, liquid feed device, high voltage source and collecting board;
described ejecting device is provided with outer gas nozzle, internal layer gas nozzle and fluid injector, outer gas nozzle, internal layer gas nozzle and fluid injector are provided with coaxial central through hole, fluid injector is located in the central through hole of internal layer gas nozzle, the internal layer gas nozzle is located in the central through hole of outer gas nozzle, outer gas nozzle is provided with air inlet, the internal layer gas nozzle is provided with air inlet, fluid injector is provided with inlet opening, the air inlet of internal layer gas nozzle is connected with feeder, the air inlet of outer gas nozzle is connected with feeder, solution tank is located on liquid feed device, solution tank is communicated with fluid injector by feed pipe, high-voltage power cathode connects the inlet opening of fluid injector, the high voltage source negative pole connects collecting board and ground connection, collecting board is positioned under ejecting device.
Described liquid feed device can adopt the syringe pump of prior art, and as U.S.'s product, model is Harvard-11Pico Plus.
The air inlet of described outer gas nozzle is preferably the radial air inlet mouth, and the air inlet of described internal layer gas nozzle is preferably the radial air inlet mouth, and the inlet opening of described fluid injector is preferably radially inlet opening.
Described feeder preferably adopts 2 air compressor machines, and 2 air compressor machine gas outlets are equipped with pressure regulator valve, and 2 air compressor machine gas outlets are communicated with the air inlet of internal layer gas nozzle and the air inlet of outer gas nozzle respectively.
Compared with the prior art, operation principle of the present invention and beneficial effect are as follows:
When the present invention uses, by regulating the feeding rate of liquid feed device, can control the feed speed of fluid injector solution; Control the voltage that imposes on fluid injector by high voltage source; Can regulate by pressure regulator valve the air pressure that feeder imposes on outer gas nozzle and internal layer gas nozzle.
The present invention can be by the admission pressure of the inside and outside layer of regulation and control gas nozzle, and inner layer ring is ejected in surrounding air around gas uniform ground, is ejected into surrounding air by outer gas and can strengthens focusing function, significantly promotes the stability that liquid jet moves.Reach the unsteady motion that utilizes steady air flow constraint electrospinning direct-writing jet, utilize the purpose of the effect of contraction raising jet stability of sheath layer gas.Internal layer gas can form stable laminar flow structure at the spinning Around Jet, outer gas can add the strong-focusing effect of contraction, lowered the relative velocity of jet and surrounding medium, suppress the generation of jet unsteady motion, can significantly improve the positioning accuracy of stability that jet sprays and electrospinning direct-writing micro-nano structure deposition.Simultaneously, sheath layer air-flow has stretching action to the spinning jet, reduced the needed starting resistor of electrospinning direct-writing and injection and kept voltage, reduced the interference that high voltage, large charge density causes and improved the stability that jet sprays; And slightly the refinement of jet has been accelerated in the stretching of layer air-flow, has improved ejection efficiency.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the present invention.
The specific embodiment
Referring to Fig. 1, the embodiment of the present invention comprises the air compressor machine of liquid feed device, solution tank, ejecting device, high voltage source 6, feeder 7(2 platform independent) and collecting board 9.
Ejecting device is provided with outer gas nozzle 3, internal layer gas nozzle 4 and fluid injector 5; Outer gas nozzle 3, internal layer gas nozzle 4 and fluid injector 5 are provided with coaxial central through hole, and fluid injector 5 is located in the central through hole of internal layer gas nozzle 4, and internal layer gas nozzle 4 is located in the central through hole of outer gas nozzle 3.Outer gas nozzle 3 is provided with the radial air inlet mouth, and internal layer gas nozzle 4 is provided with the radial air inlet mouth, and fluid injector 5 is provided with radially inlet opening.Liquid feed device 1 adopts the precise injection pump, and solution tank 2 is located on liquid feed device 1, and the outlet of solution tank 2 is communicated with the radially inlet opening of fluid injector 5 by feed pipe.The air inlet of internal layer gas nozzle 4 is connected with 1 air compressor machine 7, and the air inlet of outer gas nozzle 3 is connected with another air compressor machine 7, and 2 air compressor machine 7 gas outlets are equipped with pressure regulator valve 8.High-tension electricity .6 positive pole connects the inlet opening of fluid injector 5, and high voltage source 6 negative poles connect collecting board 9 and ground connection, and collecting board 9 is positioned under ejecting device.
When the present embodiment used, the Electrospun solution of packing in solution tank 2 by regulating the feeding rate of liquid feed device 1, can be controlled the feed speed of fluid injector 5 solution; Control by high voltage source 6 voltage that imposes on fluid injector 5; Can regulate by the pressure regulator valve 8 of 2 air compressor machines 7 air pressure that feeder imposes on outer gas nozzle 3 and internal layer gas nozzle 4.The drop that ejecting device hangs is under the acting in conjunction of high voltage electric field and air-flow, and quilt is pullled tapered, ejects fast ultra-fine jet from boring point.The liquid stream that sprays quick solvent flashing after collecting board is collected finally forms uniform nanofiber on collecting board.Inner layer ring can be ejected in surrounding air equably around gas, is ejected into surrounding air by outer gas and can strengthens focusing function, can significantly promote the stability of liquid jet motion.Reach the unsteady motion that utilizes steady air flow constraint electrospinning direct-writing jet, utilize the purpose of the effect of contraction raising jet stability of sheath layer gas.Internal layer gas can form stable laminar flow structure at the spinning Around Jet, and outer gas can add the strong-focusing effect of contraction, has lowered the relative velocity of jet and surrounding medium, suppresses the generation of jet unsteady motion.Simultaneously, sheath layer air-flow has stretching action to the spinning jet, reduced the needed starting resistor of electrospinning direct-writing and injection and kept voltage, reduced the interference that high voltage, large charge density causes and improved the stability that jet sprays; And slightly the refinement of jet has been accelerated in the stretching of layer air-flow, has improved ejection efficiency.
Claims (3)
1. an electrospinning direct-writing jet printing appts of strengthening focusing function by double-deck gas, is characterized in that being provided with ejecting device, feeder, solution tank, liquid feed device, high voltage source and collecting board;
ejecting device is provided with outer gas nozzle, internal layer gas nozzle and fluid injector, outer gas nozzle, internal layer gas nozzle and fluid injector are provided with coaxial central through hole, fluid injector is located in the central through hole of internal layer gas nozzle, the internal layer gas nozzle is located in the central through hole of outer gas nozzle, outer gas nozzle is provided with air inlet, the internal layer gas nozzle is provided with air inlet, fluid injector is provided with inlet opening, the air inlet of internal layer gas nozzle is connected with feeder, the air inlet of outer gas nozzle is connected with feeder, solution tank is located on liquid feed device, solution tank is communicated with fluid injector by feed pipe, high-voltage power cathode connects the inlet opening of fluid injector, the high voltage source negative pole connects collecting board and ground connection, collecting board is positioned under ejecting device.
2. a kind of electrospinning direct-writing jet printing appts of strengthening focusing function by double-deck gas as claimed in claim 1, the air inlet that it is characterized in that described outer gas nozzle is the radial air inlet mouth, the air inlet of described internal layer gas nozzle is the radial air inlet mouth, and the inlet opening of described fluid injector is inlet opening radially.
3. a kind of electrospinning direct-writing jet printing appts of strengthening focusing function by double-deck gas as claimed in claim 1, it is characterized in that described feeder adopts 2 air compressor machines, 2 air compressor machine gas outlets are equipped with pressure regulator valve, and 2 air compressor machine gas outlets are communicated with the air inlet of internal layer gas nozzle and the air inlet of outer gas nozzle respectively.
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| CN201310074204.5A CN103147138B (en) | 2013-03-08 | 2013-03-08 | A kind of electrospinning direct-writing jet printing appts strengthening focusing function by double-deck gas |
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| CN201310074204.5A CN103147138B (en) | 2013-03-08 | 2013-03-08 | A kind of electrospinning direct-writing jet printing appts strengthening focusing function by double-deck gas |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352261A (en) * | 2013-07-24 | 2013-10-16 | 苏州大学 | Sandwich type electrostatic spinning spraying head and method for manufacturing regenerative fibroin nanofiber yarn |
| CN103484952A (en) * | 2013-10-17 | 2014-01-01 | 厦门大学 | Sheath gas heatable focus electrospinning direct-writing nozzle device |
| CN103628150A (en) * | 2013-12-05 | 2014-03-12 | 厦门大学 | Multi-spray-head electrostatic spinning device |
| CN103924308A (en) * | 2014-05-03 | 2014-07-16 | 北京化工大学 | Solution differential electrostatic spinning device assisted by internal and external high-speed airflow |
| CN104060333A (en) * | 2014-07-03 | 2014-09-24 | 福建省贝思达环保投资有限公司 | Lotus seedpod electrospinning spray head |
| CN106890736A (en) * | 2017-03-14 | 2017-06-27 | 中国计量大学 | A kind of viscoelastic fluid drop generating device of size tunable |
| CN108950700A (en) * | 2017-05-19 | 2018-12-07 | 南京理工大学 | A kind of electrostatic spinning apparatus and method preparing fluffy state nanofiber |
| CN109837598A (en) * | 2019-04-17 | 2019-06-04 | 中国科学院长春应用化学研究所 | A kind of micro-fluidic device for spinning and method |
| CN110029402A (en) * | 2019-04-17 | 2019-07-19 | 中国科学院长春应用化学研究所 | A kind of micro-fluidic device for spinning and method |
| CN110219062A (en) * | 2019-06-26 | 2019-09-10 | 广东工业大学 | It is centrifuged electrospinning device and its gas assists wire vent system |
| CN111389472A (en) * | 2020-03-23 | 2020-07-10 | 南京工业职业技术学院 | Device and method for preparing electrospinning direct-writing multilayer microfluidic chip |
| CN112874165A (en) * | 2020-11-25 | 2021-06-01 | 华中科技大学 | Plasma microbeam coaxial electric polarization induction electric spray printing device and spray printing method |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352261A (en) * | 2013-07-24 | 2013-10-16 | 苏州大学 | Sandwich type electrostatic spinning spraying head and method for manufacturing regenerative fibroin nanofiber yarn |
| CN103352261B (en) * | 2013-07-24 | 2016-02-03 | 苏州大学 | Sandwich-type electrostatic spinning nozzle and prepare the method for regenerated silk nano fibre yarn |
| CN103484952A (en) * | 2013-10-17 | 2014-01-01 | 厦门大学 | Sheath gas heatable focus electrospinning direct-writing nozzle device |
| CN103484952B (en) * | 2013-10-17 | 2016-05-04 | 厦门大学 | Sheath layer gas can focus on electrospinning direct-writing nozzle device by heated type |
| CN103628150A (en) * | 2013-12-05 | 2014-03-12 | 厦门大学 | Multi-spray-head electrostatic spinning device |
| CN103628150B (en) * | 2013-12-05 | 2015-09-09 | 厦门大学 | A kind of multiple injector electrostatic spinning device |
| CN103924308A (en) * | 2014-05-03 | 2014-07-16 | 北京化工大学 | Solution differential electrostatic spinning device assisted by internal and external high-speed airflow |
| CN104060333A (en) * | 2014-07-03 | 2014-09-24 | 福建省贝思达环保投资有限公司 | Lotus seedpod electrospinning spray head |
| CN106890736A (en) * | 2017-03-14 | 2017-06-27 | 中国计量大学 | A kind of viscoelastic fluid drop generating device of size tunable |
| CN108950700A (en) * | 2017-05-19 | 2018-12-07 | 南京理工大学 | A kind of electrostatic spinning apparatus and method preparing fluffy state nanofiber |
| CN109837598A (en) * | 2019-04-17 | 2019-06-04 | 中国科学院长春应用化学研究所 | A kind of micro-fluidic device for spinning and method |
| CN110029402A (en) * | 2019-04-17 | 2019-07-19 | 中国科学院长春应用化学研究所 | A kind of micro-fluidic device for spinning and method |
| CN110219062A (en) * | 2019-06-26 | 2019-09-10 | 广东工业大学 | It is centrifuged electrospinning device and its gas assists wire vent system |
| CN110219062B (en) * | 2019-06-26 | 2021-09-03 | 广东工业大学 | Centrifugal electrostatic spinning equipment and gas-assisted filament discharge system thereof |
| CN111389472A (en) * | 2020-03-23 | 2020-07-10 | 南京工业职业技术学院 | Device and method for preparing electrospinning direct-writing multilayer microfluidic chip |
| CN112874165A (en) * | 2020-11-25 | 2021-06-01 | 华中科技大学 | Plasma microbeam coaxial electric polarization induction electric spray printing device and spray printing method |
| CN112874165B (en) * | 2020-11-25 | 2022-01-07 | 华中科技大学 | Plasma microbeam coaxial electric polarization induction electric spray printing device and spray printing method |
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