CN103334165B - A kind of electrostatic spinning apparatus - Google Patents
A kind of electrostatic spinning apparatus Download PDFInfo
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- CN103334165B CN103334165B CN201310231466.8A CN201310231466A CN103334165B CN 103334165 B CN103334165 B CN 103334165B CN 201310231466 A CN201310231466 A CN 201310231466A CN 103334165 B CN103334165 B CN 103334165B
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- electrostatic spinning
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- spinning apparatus
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- 238000010041 electrostatic spinning Methods 0.000 title claims abstract description 64
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 abstract description 38
- 230000008021 deposition Effects 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 15
- 238000009987 spinning Methods 0.000 abstract description 14
- 239000002121 nanofiber Substances 0.000 abstract description 13
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000001523 electrospinning Methods 0.000 description 27
- 239000012528 membrane Substances 0.000 description 9
- 230000005684 electric field Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000001186 cumulative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Landscapes
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The present invention relates to and adopt electrostatic spinning technique to prepare polymer electrospun fibers technical field.A kind of electrostatic spinning apparatus, comprise: fluid supplier, knockout, multiple electrostatic spinning nozzle, high voltage source, assist gas generating means, cylindric guide and two net cylinder collector, assist gas generating means comprises air feed pump, tracheae and vent hood, vent hood is communicated with air feed pump by tracheae, form auxiliary flow path, multiple electrostatic spinning nozzle is uniformly distributed in vent hood, cylindric guide is arranged at below assist gas generating means, it is inner that two net cylinder collector is arranged at cylindric guide, the present invention introduces secondary air and promotes that the injection of jet stretches, and utilize the squeezing action of air-flow to guide spinning nanofiber multi-layer three-dimension deposition in two net cylinder collector, realize cylindrical nanofibers filter to manufacture fast, promote that electrostatic spinning technique is in the application of filtration art.
Description
Technical field
The present invention relates to and adopt electrostatic spinning technique to prepare polymer electrospun fibers technical field, be specifically related to a kind of electrostatic spinning apparatus.
Background technology
Electrostatic spinning has become the one simply effective technology preparing Nano/micron fibers gradually since nineteen thirty is invented by Formhals.Most of polymer and copolymer, block copolymer, derivative etc. can be successfully prepared into diameter 3nm to the electrospinning fibre within the scope of 5 μm by it.Its principle is: under the effect of HV generator, high-voltage electrostatic field is formed between electrospinning liquid spinning appts and electrospinning fibre receiving system, polymer solution forms drop at the nozzle place of electrospinning liquid spinning appts and is charged, charged drop is accelerated at the Taylor vertex of a cone under electric field force effect, when electric field force is enough large, charged drop overcomes surface tension and forms electrified jet, electrified jet is when electrostatic spinning space motion, with solvent evaporates, bend and stretch, final received device is collected, and forms the electrospun fiber membrane of random alignment.
Because the electrospun fiber membrane prepared by electrostatic spinning technique has the characteristics such as porosity is high, specific area is large, permeability is high, cause the concern of more and more researcher in recent years, and demonstrated extensive and important application in every respect.But the electrospun fiber membrane that traditional pin-plate receiving pole obtains is that the electrospinning fibre produced in electrostatic spinning process is scattering into receiving pole and is randomly formed, and this rambling non-woven constructions limits the application of electrostatic spinning technique in various fields.Therefore, the ordered collection realizing electrospinning fibre becomes it and applies key.Electrospinning fibre has the advantage that diameter is little, surface area is large, show huge application potential in fields such as adsorption fouling removals, improving electrospinning fibre film thickness, increase electrospinning electrospun fiber membrane compactness and unit volume nanofiber quality is realize electrospinning fibre in the key polluting adsorbing domain application.
Electrostatic spinning process spinning jet carries electric charge and penetrates from shower nozzle, and electrified jet spatial movement will be subject to the interference of multiple factor such as electric field force, Charge repulsion, is difficult to realize controllable deposition.Along with the carrying out of injecting time, the residual charge being deposited on nanofiber thickness on collecting board and accumulation also all will increase thereupon.The motion deposition of residual charge to follow-up electrified jet on electrospun fiber membrane surface produces repulsive interaction, is unfavorable for the increase of electrospinning fibre film thickness and the raising of compactness; Particularly limit the injection manufacture of 3 D stereo electrospun fiber membrane, hinder the industrial applications development of electrostatic spinning electrospun fiber membrane.
One of existing solution is the deposition that the logical method introducing auxiliary electrode achieves three-dimensional electrospun fiber membrane, can use in biological support field; Two of existing solution is by building pinpoint array, and induction electro spinning nano fiber carries out the injection manufacture of three-D pattern on needle point, and passes through the ordered arrangement of induced nano fiber in three-D pattern of space electric field.Above-mentioned two kinds of methods tentatively can realize the three-D pattern manufacture of electrospinning fibre, but electrospinning fibre film thickness little (only hundreds of micron), compactness are poor, and its Application Areas is still restricted.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of electrostatic spinning electrospinning fibre spraying forming device, introduce secondary air and promote that the injection of jet stretches, and utilize the squeezing action of air-flow to guide the multi-layer three-dimension deposition of spinning electrospinning fibre, realize the quick injection preparation of column electro spinning nanometer fiber membrane.
To achieve these goals, the technical solution adopted in the present invention is, a kind of electrostatic spinning apparatus, comprising:
One fluid supplier, described fluid supplier outlet connection one knockout,
Multiple electrostatic spinning nozzle, the outlet of described knockout is connected with described multiple electrostatic spinning nozzle,
One high voltage source, described high voltage source is connected with described multiple electrostatic spinning nozzle by wire,
One assist gas generating means, described assist gas generating means comprises air feed pump, tracheae and vent hood, and described vent hood is communicated with air feed pump by tracheae, and form auxiliary flow path, described multiple electrostatic spinning nozzle is uniformly distributed in described vent hood,
One cylindric guide, described cylindric guide is arranged at below described assist gas generating means, and is provided with suction interface bottom this cylindric guide,
A pair of net cylinder collector, be arranged at described cylindric guide inner, the open top of described pair of net cylinder collector is just to below auxiliary flow path, described pair of net cylinder collector is made up of an outer net cylinder, an Intranet cylinder and a base plate, described outer net cylinder and Intranet cylinder are all arranged on described base plate, described base plate offers steam vent, and described outer net cylinder, outer net cylinder are all connected with ground wire with base plate.
Further, the diameter of described vent hood opening surface is slightly less than the outer net cylinder diameter of two net cylinder collector.
Further, described outer net cylinder is for having the net cylinder of upper and lower opening, and described Intranet cylinder is for having the net cylinder of bottom opening, and all cylindrically, described outer net cylinder and Intranet cylinder axis overlap for described outer net cylinder and Intranet cylinder.
Further, described base plate lower surface is provided with annular boss, is provided with the annular groove matched with this annular boss bottom described cylindric guide.
Further, described cylindric guide bottom centre is provided with center extraction interface.
Further, bottom described cylindric guide, surrounding is provided with multiple surrounding suction interface.
Further, described surrounding suction interface is uniformly distributed in surrounding bottom described cylindric guide, and described surrounding suction interface number is 4 ~ 8.
Further, also comprise air extractor, described air extractor comprises an exhaust tube and an aspiration pump, and described center extraction interface is connected with aspiration pump through this exhaust tube with surrounding suction interface.
Further, described outer net cylinder is highly greater than Intranet cylinder height 1 ~ 3cm.
Further, the number of described multiple electrostatic spinning nozzle is 3 ~ 20.
The present invention is by adopting technique scheme, compared with prior art, tool has the following advantages: electrostatic spinning apparatus of the present invention, assist gas generating means is introduced in collection electrospinning fibre process, construct the two net cylinder collector of netted electrostatic spinning, be provided with auxiliary flow path and introduce circling gas flow, promote the slenderizing that band electrospinning jet carries out, increase spinning jet jet velocity and improve ejection efficiency; Be provided with two net cylinder collector and carry out multi-layer three-dimension structure deposition modeling for guiding electro spinning nano fiber; Electrostatic spinning course of injection, two net cylinder collector is positioned in cylindric guide; Cylindric guide is provided with suction interface, this suction interface connects aspiration pump, in electrostatic spinning course of injection, aspiration pump matches with the assist gas of electrostatic spinning nozzle formation downdraught, additional stretch power is produced to spinning fibre, accelerates the collection deposition velocity of spinning nanofiber in two net cylinder collector inside; Meanwhile, downdraught is conducive to taking away the stored charge on deposit fiber surface, overcomes the repulsive interaction that on collector, residual charge moves to subsequent shot and deposits; Moreover be loaded with extra lower pulling force towards downstream to electrostatic spinning nano fiber, be beneficial to the cumulative deposition of multilayer of Electrospun nano-fibers and three-dimensionally shaped, realize cylindrical nanofibers filter and manufacture fast, promotion electrostatic spinning technique is in the application of filtration art.
Accompanying drawing explanation
Fig. 1 is the sectional view of embodiments of the invention;
Fig. 2 is the A place enlarged drawing of Fig. 1.
Detailed description of the invention
Now the present invention is further described with detailed description of the invention by reference to the accompanying drawings.
As a specific embodiment, as depicted in figs. 1 and 2, a kind of electrostatic spinning apparatus of the present invention, comprising: fluid supplier 19, knockout 18, multiple electrostatic spinning nozzle 2, high voltage source 1, assist gas generating means, a cylindric guide 3 and a pair of net cylinder collector.
Described fluid supplier 19 exports connection one knockout 18, and the outlet of described knockout 18 is connected with described electrostatic spinning nozzle 2, and described high voltage source 1 is connected with described electrostatic spinning nozzle 2 by wire.
Described assist gas generating means comprises air feed pump 17, tracheae 16 and vent hood 15, and described vent hood 15 is communicated with air feed pump 17 by tracheae 16, and form auxiliary flow path, spinning process passes to secondary air and is surrounded on around spinning jet.Described multiple electrostatic spinning nozzle 2 quantity can be 3 ~ 20, is uniformly distributed in described vent hood 15.
Described cylindric guide 3 is arranged at below described assist gas generating means, and this cylindric guide 3 bottom centre is provided with center extraction interface 12, bottom described cylindric guide 3, surrounding is provided with multiple surrounding suction interface 9, described surrounding suction interface 9 is uniformly distributed in surrounding bottom described cylindric guide 3, described surrounding suction interface 9 number is 4 ~ 8, and center extraction interface 12 is connected with aspiration pump 10 through exhaust tube 11 with surrounding suction interface 9.
The open top of described pair of net cylinder collector is just to below auxiliary flow path, described pair of net cylinder collector is by an outer net cylinder 5, one Intranet cylinder 6 and a base plate 8 are formed, described outer net cylinder 5 is for having the net cylinder of upper and lower opening, described Intranet cylinder 6 is for having the net cylinder of bottom opening, described outer net cylinder 5 and Intranet cylinder 6 are all cylindrically, the axis of described outer net cylinder 5 and Intranet cylinder 6 overlaps and is all vertically installed on this base plate 8 with this base plate 8, bracing frame 4 is supported in described outer net cylinder 5 top outer edge, described base plate 8 is plectane, described outer net cylinder 5 is all corresponding with this base plate 8 home position with the bottom centre of Intranet cylinder 6, described outer net cylinder 5 is highly greater than the height 1 ~ 3cm of Intranet cylinder 6.Outer net cylinder 5 diameter of described pair of net cylinder collector is slightly less than the diameter of described vent hood 15 opening surface, to ensure that electrostatic spinning process nanofiber can deposition collection in two net cylinder collector preferably.Described base plate 8 lower surface is provided with annular boss 13, is provided with the annular groove 14 matched with this annular boss 13 bottom described cylindric guide 3.Described annular groove 14 matches with this annular boss 13 equal diameters, gauge, and described annular boss 13 is embedded on this annular groove 14, thus this pair of net cylinder collector is fixed in described cylindric guide 3.
Described base plate 8 offers steam vent 7, and center extraction interface 12 co-axially align of described steam vent 7 and cylindric guide 3 also communicates.Electrostatic spinning event exhaust hole 7, as gas channel, flows to steam vent 7 by the space between outer net cylinder 5 and Intranet cylinder 6 through Intranet cylinder 6 towards downstream.
Described outer net cylinder 5, Intranet cylinder 6 are all connected with ground wire with base plate 8.
In electrostatic spinning process, fluid supplier 19 provides the spinning material solution of electrostatic spinning, branch in each electrostatic spinning nozzle 2 entrance through knockout 18, described electrostatic spinning nozzle 2 is connected with the positive pole of high voltage source 1, two net cylinder collectors below described multiple electrostatic spinning nozzle 2 are connected with the negative pole of high voltage source 1 and are connected with earth polar simultaneously, electric field is formed like this between multiple electrostatic spinning nozzle 2 and two net cylinder collector, the material solution that multiple electrostatic spinning nozzle 2 place ejects forms taylor cone in high-voltage electrostatic field, spinning jet will be there is when electric-field intensity meets the demands and form fiber.Described assist gas generating means to be communicated with vent hood 15 through tracheae 16 by air feed pump 17 and to form auxiliary flow path, secondary air is provided to be surrounded on spinning jet surrounding, be surrounded on multiple electrostatic spinning nozzle 2 and jet surrounding secondary air will carry away the electric charge that electrostatic spinning nozzle 2 focuses on, reduce multiple electrostatic spinning nozzle 2 charge density and overcome mutual inhibitory action between each electrostatic spinning nozzle 2, spray while ensureing adjacent electrostatic spinning nozzle 2 and improve spray high efficiency; Extra drawing force will be loaded on spinning jet towards downstream in auxiliary flow path, and be combined to electric field force the further slenderizing promoting jet; Moreover secondary air serves constraint and guiding function to jet motion flight path, guide electrospinning fibre to carry out the cumulative deposition of multilayer in presumptive area, can prevent fiber laydown area from spreading and affecting collecting effect.
In the collection process of fiber, two net cylinder collector and cylindric guide 3 is flowed into towards downstream, this is divided into two parts towards downstream, a part inwardly flows to aspiration pump 10 through the center extraction interface 12 of two net cylinder collector Intranet 6, steam vent 7, cylindric guide 3, and a part outwards flows to aspiration pump 10 through two net cylinder collector outer net 5, cylindric guide 3 surrounding suction interface 9 in addition.Aspiration pump 10 through center extraction interface 12, surrounding suction interface 9 take away between outer net cylinder 5 and Intranet cylinder 6, in Intranet cylinder 6 and between outer net cylinder 5 and cylindric guide 3 towards downstream, this from auxiliary flow path in downstream and electrospinning fibre course of injection towards the mutual superposition of downstream, in two net cylinder collector, form stronger guiding air-flow, guide the space of electrospinning fibre between two net cylinder collector outer net cylinder 5 and Intranet cylinder 6 to carry out cumulative deposition.The introducing of two net cylinder collector, contribute to forming complete gas channel from air feed pump 17 through auxiliary flow path, outer net cylinder 5 (or Intranet cylinder 6), surrounding suction interface 9 (or center extraction interface 12), aspiration pump 10, avoid the reflection of assist gas on tabular collector, and have impact on electrospinning fibre add up deposition compactness and deposition velocity.There is air feed pump 17 and with the secondary air of aspiration pump 10, there is good guiding function, deposition position and the range of deposition of electrospinning fibre can be controlled, be conducive to the efficient cumulative deposition of electrospinning fibre.Moreover the defeated air-flow that helps flows through, can carry away the electric charge of the accumulation deposited on electrospinning fibre from top to bottom, minimizing residual charge density weakens the repulsive interaction to subsequent deposition fiber, promotes that the cumulative deposition of multi-layer nano fiber improves collection efficiency.
Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (10)
1. an electrostatic spinning apparatus, is characterized in that, comprising:
One fluid supplier, described fluid supplier outlet connection one knockout,
Multiple electrostatic spinning nozzle, the outlet of described knockout is connected with described multiple electrostatic spinning nozzle,
One high voltage source, described high voltage source is connected with described multiple electrostatic spinning nozzle by wire,
One assist gas generating means, described assist gas generating means comprises air feed pump, tracheae and vent hood, and described vent hood is communicated with air feed pump by tracheae, and form auxiliary flow path, described multiple electrostatic spinning nozzle is uniformly distributed in described vent hood,
One cylindric guide, described cylindric guide is arranged at below described assist gas generating means, and is provided with suction interface bottom this cylindric guide,
A pair of net cylinder collector, described pair of net cylinder collector is arranged at described cylindric guide inside, the open top of described pair of net cylinder collector is just to below auxiliary flow path, described pair of net cylinder collector is made up of an outer net cylinder, an Intranet cylinder and a base plate, described outer net cylinder and Intranet cylinder are all arranged on described base plate, described base plate offers steam vent, and described outer net cylinder, outer net cylinder are all connected with ground wire with base plate.
2. a kind of electrostatic spinning apparatus according to claim 1, is characterized in that: the diameter of described vent hood opening surface is slightly less than the outer net cylinder diameter of two net cylinder collector.
3. a kind of electrostatic spinning apparatus according to claim 1, it is characterized in that: described outer net cylinder is for having the net cylinder of upper and lower opening, described Intranet cylinder is for having the net cylinder of bottom opening, and all cylindrically, described outer net cylinder and Intranet cylinder axis overlap for described outer net cylinder and Intranet cylinder.
4. a kind of electrostatic spinning apparatus according to claim 1, is characterized in that: described base plate lower surface is provided with annular boss, is provided with the annular groove matched with this annular boss bottom described cylindric guide.
5. a kind of electrostatic spinning apparatus according to claim 1, is characterized in that: described cylindric guide bottom centre is provided with center extraction interface.
6. a kind of electrostatic spinning apparatus according to claim 5, is characterized in that: bottom described cylindric guide, surrounding is provided with multiple surrounding suction interface.
7. a kind of electrostatic spinning apparatus according to claim 6, is characterized in that: described surrounding suction interface is uniformly distributed in surrounding bottom described cylindric guide, and described surrounding suction interface number is 4 ~ 8.
8. a kind of electrostatic spinning apparatus according to claim 7, is characterized in that: also comprise air extractor, and described air extractor comprises an exhaust tube and an aspiration pump, and described center extraction interface is connected with aspiration pump through this exhaust tube with surrounding suction interface.
9. a kind of electrostatic spinning apparatus according to claim 1, is characterized in that: described outer net cylinder is highly greater than Intranet cylinder height 1 ~ 3cm.
10. a kind of electrostatic spinning apparatus according to claim 1, is characterized in that: the number of described multiple electrostatic spinning nozzle is 3 ~ 20.
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CN103952778B (en) * | 2014-05-05 | 2016-02-03 | 福建师范大学 | There is the air-flow auxiliary electrostatic spinning instrument of real-time sampling function |
CN104018236B (en) * | 2014-06-13 | 2017-01-04 | 华侨大学 | Nano fiber batch patterning apparatus |
CN104928768B (en) * | 2015-04-08 | 2017-05-03 | 烟台森森环保科技有限公司 | Internal and external circular air assisted electrospinning nozzle unit |
CN104831370B (en) * | 2015-05-22 | 2017-04-05 | 厦门大学 | Spiral air flow auxiliary electrostatic device for spinning |
CN105040122B (en) * | 2015-08-28 | 2017-04-05 | 厦门大学 | Nanofibres deposit device |
CN105350089B (en) * | 2015-11-13 | 2017-12-26 | 广东工业大学 | A kind of pneumoelectric collected based on negative pressure spins three-dimensional rack preparation method and device |
CN107829157B (en) * | 2017-01-13 | 2019-10-08 | 大连民族大学 | A kind of electrospinning process |
CN109023557B (en) * | 2018-09-14 | 2020-11-06 | 浙江农林大学暨阳学院 | Electrostatic spinning device |
CN113249876A (en) * | 2021-06-10 | 2021-08-13 | 上海科技大学 | Ion conductor material and preparation method and application thereof |
CN113355803B (en) * | 2021-06-11 | 2022-08-26 | 广东三水合肥工业大学研究院 | Device for preparing nanofiber membrane |
CN115386972B (en) * | 2022-09-05 | 2023-07-14 | 广东石油化工学院 | Cam driving wire mesh type electrostatic spinning device and use method thereof |
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CN103147139A (en) * | 2013-04-02 | 2013-06-12 | 厦门大学 | Gas induced electrospinning device |
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US7582247B2 (en) * | 2005-08-17 | 2009-09-01 | E. I. Du Pont De Nemours And Company | Electroblowing fiber spinning process |
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CN101126179A (en) * | 2007-09-25 | 2008-02-20 | 江西师范大学 | High-speed air-blowing static spinning composite preparation method and device for ultra-fine polymer fibre |
CN102766913A (en) * | 2012-07-25 | 2012-11-07 | 兰州大学 | Novel electrostatic spinning collector |
CN103147139A (en) * | 2013-04-02 | 2013-06-12 | 厦门大学 | Gas induced electrospinning device |
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