CN102433596B - Gathering unit and method for Taylor cone shower nozzle electrostatic spinning-oriented nanofiber - Google Patents
Gathering unit and method for Taylor cone shower nozzle electrostatic spinning-oriented nanofiber Download PDFInfo
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- CN102433596B CN102433596B CN201110447844.7A CN201110447844A CN102433596B CN 102433596 B CN102433596 B CN 102433596B CN 201110447844 A CN201110447844 A CN 201110447844A CN 102433596 B CN102433596 B CN 102433596B
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Abstract
The invention relates to a gathering unit and method for a Taylor cone shower nozzle electrostatic spinning-oriented nanofiber. The gathering unit comprises an insulation material plate, an outer-side metal circular ring, an inner-side metal circular ring, an alternating-current voltage output device, an insulation film matrix and a Taylor cone shower nozzle, wherein the outer-side metal circular ring and the inner-side metal cicular ring of which the axle wires are mutually coincident are fixed on the lower surface of the insulation material plate; and the Taylor cone shower nozzle is positioned just below the outer-side metal circular ring and the inner-side metal circular ring. The method comprises the following steps of: injecting a spinning solution into the Taylor cone shower nozzle; connecting a binding post with a high-voltage positive electrode; connecting the outer-side metal circular ring with the alternating-current voltage output device; connecting the inner-side metal circular ring with an earth wire; arranging the insulation film matrix below the outer-side metal circular ring and the inner-side metal cicular ring; and starting a high-voltage electrostatic generation device and the alternating-current voltage output device. Compared with the prior art, the invention has the advantages of higher orientation degree and yield of the obtained nanofiber, and capability of realizing continuous production of the electrostatic spinning-oriented nanofiber.
Description
Technical field
The invention belongs to electrostatic spinning technique field, particularly relate to a kind of gathering-device and method of taylor cone nozzle electrospinning oriented nanofibers.
Background technology
Electrostatic spinning is a kind of at present popular straightforward procedure of preparing nanofiber, with it possess that equipment is simple, raw material sources extensively, technical process do not destroy the features such as material body, received more and more researchers' concern.Electrostatic spinning nano fiber relies on the features such as its product fineness is thin, porosity is high, surface area is large, is widely used in the fields such as filtering material, sensor, organizational project, medicament slow release.
Electrostatic spinning is that charged drop forms taylor cone under the effect of electric field force by polymer solution or melt band several thousand and even the high-pressure electrostatic of volts up to ten thousand, and in the time that electric field force is enough large, electric field force can be bored point at taylor cone and be overcome solution surface tension and form and spray thread.The refinement that is stretched under the effects such as electric field force, viscosity resistance, surface tension of charged polymer jet, simultaneously charged jet in electric field owing to existing surface charge to bend.Thread is solvent evaporation or curing in course of injection, finally drops on receiving system, forms the nanofiber mats of similar nonwoven fabric.
Up to the present, most of electrostatic spinning nano fibers are to collect with the form of nonwoven fabric, and the arrangement of nanofiber is disorderly and unsystematic, thereby have limited its range of application.But we know according to traditional fiber and textile industry knowledge, continuous single nanofiber and the vertically bundles of nanofibers of orientation will have more widely to be applied.But the bundles of nanofibers or the single nanofiber that utilize Static Spinning to make orientations are all very difficult.Because in Static Spinning process, the motion of polymer jet is very complicated, three-dimensional " whip is moving ", and non-directional motion state, therefore domestic and international many researchers are making great efforts to study the method that makes oriented nanofibers.Some scholar is based on needle-based shower nozzle, and adopt the metal roller of High Rotation Speed there is the round turntable of sharp edges or framework as gathering-device, though the degree of orientation of the nanofiber of collecting increases, output is very low.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of gathering-device and method of taylor cone nozzle electrospinning oriented nanofibers, and the degree of orientation that changes oriented nanofibers in current electrostatic spinning process is not high, and the present situation yielding poorly.
The technical solution adopted for the present invention to solve the technical problems is: the gathering-device that a kind of taylor cone nozzle electrospinning oriented nanofibers is provided, comprise dielectric panel, outside metal ring, inner side metal ring, alternating voltage output device, insulation film matrix, taylor cone shower nozzle, described dielectric panel lower surface is fixed with outside metal ring and inner side metal ring; Described outside metal ring and the axis of inner side metal ring overlap, and are positioned at same plane; Described outside metal ring is connected with alternating voltage output device, and described inner side metal ring is connected with earth connection; Described insulation film matrix is placed under outside metal ring and inner side metal ring, and covers under described outside metal ring and inner side metal ring; Described taylor cone shower nozzle is open type disk, and its axis overlaps with the axis of outside metal ring and inner side metal ring, and is positioned under outside metal ring and inner side metal ring; Described taylor cone shower nozzle is provided with binding post, and described binding post is connected with the high pressure positive electrode of external high-voltage electrostatic generator.
Described inner side metal ring radius is 0.1～10cm, the large 0.5～2cm of metal ring radius inside described outside metal ring radius ratio.
Described insulation film matrix is polyester (PET) film-shaped matrix, and thickness is 50～1000 μ m.
Described taylor cone shower nozzle adopts copper material to make.
Vertical range between described outside metal ring and taylor cone shower nozzle is 20～50cm.
A collection method for taylor cone nozzle electrospinning oriented nanofibers, comprises the following steps:
(1) in taylor cone shower nozzle, inject spinning solution by external automatic infusion device, the binding post on taylor cone shower nozzle is connected with the high pressure positive electrode of external high-voltage electrostatic generator;
(2) outside metal ring is connected with alternating voltage output device, inner side metal ring is connected with earth connection, and insulation film matrix is placed under outside metal ring and inner side metal ring, and cover under described outside metal ring and inner side metal ring;
(3) open high-voltage electrostatic generator and alternating voltage output device;
(4) spinning solution in taylor cone shower nozzle forms taylor cone under the effect of electric field force, upwards extracts jet, solvent evaporates out; Utilize the AC field producing between outside metal ring and inner side metal ring simultaneously, make the nanofiber generating produce orientation, and be collected on insulation film matrix in the circular region between outside metal ring and inner side metal ring; Collected oriented nanofibers felt presents circular, and its external diameter equals the radius of outside metal ring, and its internal diameter equals the radius of inner side metal ring.
Described spinning solution is poly-vinyl alcohol solution, and concentration is 8%～12%.
The voltage value of described high-voltage electrostatic generator is set to 45kV; The field intensity of described alternating voltage output device (8) is set to 0.33kV/mm, and set of frequency is 500Hz.
beneficial effect
Compared to existing technology, the nanofiber degree of orientation and the output that make are all higher in the present invention, and can realize the continuous production of Static Spinning oriented nanofibers.In addition, apparatus of the present invention are rational in infrastructure and succinct, and manufacturing cost is low, and method is simple to operation, practical, has broad application prospects.
Accompanying drawing explanation
Fig. 1 is a kind of gathering-device structural representation of taylor cone nozzle electrospinning oriented nanofibers;
Fig. 2 is a kind of gathering-device top view of taylor cone nozzle electrospinning oriented nanofibers;
Fig. 3 is the three-dimensional simple and easy schematic diagram of a kind of gathering-device of taylor cone nozzle electrospinning oriented nanofibers;
Fig. 4 is the indicative of local optical microphotograph that utilizes the nanofiber mats that device and method of the present invention collects;
1. taylor cone shower nozzle 2. binding post 3. insulation film matrix 4. outside metal ring 5. inner side metal rings
6. dielectric panel 7. high pressure positive electrode 8. alternating voltage output device 9. earth connections
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
As shown in Figure 1, Figure 2, Figure 3 shows, the gathering-device of a kind of taylor cone nozzle electrospinning of the present invention oriented nanofibers, comprise dielectric panel 6, outside metal ring 4, inner side metal ring 5, alternating voltage output device 8, insulation film matrix 3, taylor cone shower nozzle 1, described dielectric panel 6 lower surfaces are fixed with outside metal ring 4 and inner side metal ring 5; Described outside metal ring 4 and the axis of inner side metal ring 5 overlap, and are positioned at same plane; Described outside metal ring 4 is connected with alternating voltage output device 8, and described inner side metal ring 5 is connected with earth connection 9; Described insulation film matrix 3 is placed under outside metal ring 4 and inner side metal ring 5, and covers described outside metal ring 4 and inner side metal ring 5 times; Described taylor cone shower nozzle 1 is open type disk, and its axis overlaps with the axis of outside metal ring 4 and inner side metal ring 5, and is positioned under outside metal ring 4 and inner side metal ring 5; Described taylor cone shower nozzle 1 is provided with binding post 2, and described binding post 2 is connected with the high pressure positive electrode 7 of external high-voltage electrostatic generator.
Described inner side metal ring 5 radiuses are 0.1～10cm, the large 0.5～2cm of metal ring 5 radius inside described outside metal ring 4 radius ratios.
Described insulation film matrix 3 is polyester (PET) film-shaped matrix, and thickness is 50～1000 μ m.
Described taylor cone shower nozzle 1 adopts copper material to make.
Vertical range between described outside metal ring 4 and taylor cone shower nozzle 1 is 20～50cm.
A collection method for taylor cone nozzle electrospinning oriented nanofibers, comprises the following steps:
(1) in taylor cone shower nozzle 1, inject spinning solution by external automatic infusion device, the binding post on taylor cone shower nozzle 12 is connected with the high pressure positive electrode 7 of external high-voltage electrostatic generator;
(2) outside metal ring 4 is connected with alternating voltage output device 8, inner side metal ring 5 is connected with earth connection 9, and insulation film matrix 3 is placed under outside metal ring 4 and inner side metal ring 5, and cover described outside metal ring 4 and inner side metal ring 5 times;
(3) open high-voltage electrostatic generator and alternating voltage output device 8;
(4) spinning solution in taylor cone shower nozzle 1 forms taylor cone under the effect of electric field force, upwards extracts jet, solvent evaporates out; Utilize the AC field producing between outside metal ring 4 and inner side metal ring 5 simultaneously, make the nanofiber generating produce orientation, and be collected on insulation film matrix 3 in the circular region between outside metal ring 4 and inner side metal ring 5; Collected oriented nanofibers felt presents circular, and its external diameter equals the radius of outside metal ring 4, and its internal diameter equals the radius of inner side metal ring 5.
Described spinning solution is poly-vinyl alcohol solution, and concentration is 8%～12%.
The voltage value of described high-voltage electrostatic generator is set to 45kV; The field intensity of described alternating voltage output device 8 is set to 0.33kV/mm, and set of frequency is 500Hz.
The present invention's taylor cone shower nozzle 1 used is open type disk, has avoided the generation of needle head structure device clogging, changes and cleans shower nozzle without frequent, has greatly improved production efficiency, and has easily cleaned after using.Taylor cone shower nozzle 1 adopts copper material to make, and due to conducting electricity very well of copper, has reduced energy loss; On the other hand, known according to the ABC of electric field, the inwall tip edges electric-field intensity maximum of taylor cone shower nozzle 1, the surface tension that more easily overcomes spinning solution forms jet, has increased the output of oriented nanofibers.
Further illustrate the present invention with the example that adopts polyvinyl alcohol (PVA) solution to carry out spinning below.The polyvinyl alcohol that is 10% by concentration by external automatic infusion device (PVA) solution injects taylor cone shower nozzle 1, and the binding post on taylor cone shower nozzle 12 is connected with the high pressure positive electrode 7 of external high-voltage electrostatic generator; The vertical range arranging between outside metal ring 4 and taylor cone shower nozzle 1 is 25cm; Outside metal ring 4 is connected with alternating voltage output device 8, inner side metal ring 5 is connected with earth connection 9, selecting thickness is that polyester (PET) film-shaped matrix of 100 μ m is as insulation film matrix 3, and be placed on metal ring 4 belows, outside, and cover the circular region between outside metal ring 4 and inner side metal ring 5; Open high-voltage electrostatic generator, it is 45kV that voltage value is set; Open alternating voltage output device 8, it is 0.33kV/mm that field intensity is set, and frequency is 500Hz; As shown in Figure 4, the diameter of the oriented nanofibers of preparing is about 460nm (average diameter is about 460nm for the indicative of local optical microphotograph of nanofiber mats, 1000 times of multiplication factors).
Claims (8)
1. the gathering-device of a taylor cone nozzle electrospinning oriented nanofibers, comprise dielectric panel (6), outside metal ring (4), inner side metal ring (5), alternating voltage output device (8), insulation film matrix (3), taylor cone shower nozzle (1), it is characterized in that: described dielectric panel (6) lower surface is fixed with outside metal ring (4) and inner side metal ring (5); Described outside metal ring (4) and the axis of inner side metal ring (5) overlap, and are positioned at same plane; Described outside metal ring (4) is connected with alternating voltage output device (8), and described inner side metal ring (5) is connected with earth connection (9); Described insulation film matrix (3) is placed under outside metal ring (4) and inner side metal ring (5), and covers under described outside metal ring (4) and inner side metal ring (5); Described taylor cone shower nozzle (1) is open type disk, and its axis overlaps with the axis of outside metal ring (4) and inner side metal ring (5), and is positioned under outside metal ring (4) and inner side metal ring (5); Described taylor cone shower nozzle (1) is provided with binding post (2), and described binding post (2) is connected with the high pressure positive electrode (7) of external high-voltage electrostatic generator.
2. the gathering-device of a kind of taylor cone nozzle electrospinning oriented nanofibers as claimed in claim 1, it is characterized in that: described inner side metal ring (5) radius is 0.1～10cm the large 0.5～2cm of metal ring (5) radius inside described outside metal ring (4) radius ratio.
3. the gathering-device of a kind of taylor cone nozzle electrospinning oriented nanofibers as claimed in claim 1, is characterized in that: described insulation film matrix (3) is polyester PET film-shaped matrix, and thickness is 50～1000 μ m.
4. the gathering-device of a kind of taylor cone nozzle electrospinning oriented nanofibers as claimed in claim 1, is characterized in that: described taylor cone shower nozzle (1) adopts copper material to make.
5. the gathering-device of a kind of taylor cone nozzle electrospinning oriented nanofibers as claimed in claim 1, is characterized in that: the vertical range between described outside metal ring (4) and taylor cone shower nozzle (1) is 20～50cm.
6. a collection method for taylor cone nozzle electrospinning oriented nanofibers, is used as claimed in claim 1 a kind of safe
The gathering-device of strangling cone nozzle electrospinning oriented nanofibers, is characterized in that, comprises the following steps:
(1) in taylor cone shower nozzle (1), inject spinning solution by external automatic infusion device, the binding post (2) on taylor cone shower nozzle (1) is connected with the high pressure positive electrode (7) of external high-voltage electrostatic generator;
(2) outside metal ring (4) is connected with alternating voltage output device (8), inner side metal ring (5) is connected with earth connection (9), and insulation film matrix (3) is placed under outside metal ring (4) and inner side metal ring (5), and cover under described outside metal ring (4) and inner side metal ring (5);
(3) open high-voltage electrostatic generator and alternating voltage output device (8);
(4) spinning solution in taylor cone shower nozzle (1) forms taylor cone under the effect of electric field force, upwards extracts jet, solvent evaporates out; Utilize the AC field producing between outside metal ring (4) and inner side metal ring (5) simultaneously, make the nanofiber generating produce orientation, and be collected in the circular region being positioned on insulation film matrix (3) between outside metal ring (4) and inner side metal ring (5); Collected oriented nanofibers felt presents circular, and its external diameter equals the radius of outside metal ring (4), and its internal diameter equals the radius of inner side metal ring (5).
7. the collection method of a kind of taylor cone nozzle electrospinning oriented nanofibers as claimed in claim 6, is characterized in that: described spinning solution is poly-vinyl alcohol solution, and concentration is 8%～12%.
8. the collection method of a kind of taylor cone nozzle electrospinning oriented nanofibers as claimed in claim 6, is characterized in that: the voltage value of described high-voltage electrostatic generator is set to 45kV; The field intensity of described alternating voltage output device (8) is set to 0.33kV/mm, and set of frequency is 500Hz.
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| CN201110447844.7A CN102433596B (en) | 2011-12-28 | 2011-12-28 | Gathering unit and method for Taylor cone shower nozzle electrostatic spinning-oriented nanofiber |
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| CN103060931B (en) * | 2012-12-25 | 2015-09-23 | 浙江大东南集团有限公司 | A kind of without shower nozzle large area continuous nano-fibre electrostatic spinning apparatus |
| CN103103642A (en) * | 2013-02-22 | 2013-05-15 | 东华大学 | Device and method for orientation electrostatic spinning nanometer fiber vortex spun yarn |
| CN104611772B (en) * | 2015-01-15 | 2017-01-25 | 东华大学 | Electrostatic spinning device for preparing coaxial nanofiber in batches |
| CZ306428B6 (en) * | 2015-06-05 | 2017-01-18 | Technická univerzita v Liberci | A linear fibre formation with a case of polymeric nanofibres enveloping the supporting linear formation constituting the core, the method and equipment for its production |
| GB201820411D0 (en) * | 2018-12-14 | 2019-01-30 | Univ Birmingham | Electrospinning |
| CN112981556B (en) * | 2021-02-08 | 2022-05-17 | 华南理工大学 | Electrostatic spinning fiber collecting device and method for preparing nanofiber membrane with radial orientation structure |
| CN112946050B (en) * | 2021-03-16 | 2023-04-07 | 扬州大学 | Anti-static multi-morphology experimental deposition device and method for electrostatic spinning experiment |
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| CZ201093A3 (en) * | 2010-02-05 | 2011-08-17 | Cpn S.R.O. | Device for producing two-dimensional or three-dimensional fibrous materials from microfibers or nanofibers |
| CN101857976B (en) * | 2010-05-19 | 2011-06-08 | 青岛大学 | Device for preparing nano fibers with ordered arrangement and cross structures |
| CN202519373U (en) * | 2011-12-28 | 2012-11-07 | 东华大学 | Collecting device of electrostatic spinning oriented nanofiber of Taylor cone nozzle |
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