CN103173874B - High-orientation nanofiber collecting device and method - Google Patents
High-orientation nanofiber collecting device and method Download PDFInfo
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- CN103173874B CN103173874B CN201310134672.7A CN201310134672A CN103173874B CN 103173874 B CN103173874 B CN 103173874B CN 201310134672 A CN201310134672 A CN 201310134672A CN 103173874 B CN103173874 B CN 103173874B
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Abstract
The invention relates to a high-orientation nanofiber collecting device and high-orientation nanofiber collecting method. The device comprises a metal installation disc, metal wires, a coupler, a motor, metal blades, a metal guide rod and a negative electrode high-voltage electrostatic output device; the metal wires are installed on the metal installation disc so as to form an expansion cylinder; the metal installation disc is connected with the motor through the coupler and is driven to rotate by the motor; the metal blades are distributed on the metal guide rod; the metal guide rod with the metal blades are positioned in the expansion cylinder formed by the metal wires; and the metal guide rod is connected with the negative electrode electrostatic output device. The method is characterized in that the metal blades are utilized for concentrating the electric field, and the curve instability of jet flow is reduced; the jet flow is stretched among the metal wires by utilizing capacity formed among the metal wires mutually, and finally high-orientation nanofibers are collected onto the expansion cylinder formed by the metal wires. According to the invention, the orientation degree of the orientation nanofibers is improved, and the yield is increased.
Description
Technical field
The present invention relates to electrostatic spinning technique field, particularly relate to a kind of height-oriented collecting nanofibers device and method.
Background technology
Electrostatic spinning is a kind of straightforward procedure preparing nanofiber popular at present, possess that equipment is simple with it, raw material sources extensively, technical process do not destroy the features such as material body, receives the concern of increasing researcher.Because electrostatic spinning nano fiber fineness is thin, porosity is high, and surface area is large, and applied range, can be used on filtering material, sensor, organizational project, the aspects such as medicament slow release.
Electrostatic spinning is that charged drop forms taylor cone under electric field force effect by polymer solution or melt band several thousand and even volt high-pressure electrostatic up to ten thousand, and when electric field force is enough large, electric field force can be bored point at taylor cone and be overcome solution surface tension and formed and spray thread.Charged polymer jet is stretched refinement under the effect such as electric field force, viscosity resistance, surface tension, and electrified jet bends owing to there is surface charge in the electric field simultaneously.Thread is solvent evaporation or solidification in course of injection, finally falls on the reception device, forms the nanofiber mats of similar nonwoven fabric.
Up to the present, most of electrostatic spinning nano fiber collects with the form of nonwoven fabric, and the arrangement of nanofiber is disorderly and unsystematic, because which limit its range of application.But we know from traditional fiber and textile industry, the nanofiber mats of the single nanofiber of continuous print and vertically orientation then has to be applied more widely.But, Static Spinning is utilized to produce the nanofiber mats of orientations or single nanofiber is all very difficult, because in Static Spinning process, the motion of polymer jet is very complicated, three-dimensional " whip moves ", and non-directional motion state, therefore domestic and international many researchers are in the method for making great efforts the obtained oriented nanofibers of research.Two kinds are mainly contained at present: a kind of is utilize the cylinder of High Rotation Speed as gathering-device for the method for collecting oriented nanofibers, the rotation speed requirements of the method to cylinder is higher, and the degree of orientation is poor, some scholars utilizes the methods such as auxiliary electrode to improve, but DeGrain, as Chinese patent 200810070364.1 utilizes copper pipe to form the nanofiber of cylinder collection orientation, rotating speed used is 800-1000rpm, rotating speed is still very high, and the quantity of the oriented nanofibers collected is little; Another kind is the gathering-device adopting parallel metal sheet to form, and the nanofiber degree of orientation that this device is collected is higher, but fiber-wall-element model is deteriorated when increasing number, and some scholars improves on this basis, but effect is still not obvious.So up to the present, also do not produce the higher and nanofiber that output is also higher of the degree of orientation.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of height-oriented collecting nanofibers device and method, and the degree of orientation of oriented nanofibers is improved, and output increases.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of height-oriented collecting nanofibers device, comprise metal mounting disc, wire, shaft coupling, motor, metal blade, metal guide rod and negative pole high-pressure electrostatic output device, described wire is arranged in described metal mounting disc and forms cylinder; Described metal mounting disc is connected with described motor by shaft coupling, and drives rotation by described motor; Described metal guide rod is distributed with metal blade, and the metal guide rod with metal blade is positioned at the drums inside be made up of described wire; Described metal guide rod is connected with described negative pole high-pressure electrostatic output device.
Described motor and metal guide rod are fixed on base plate respectively by support.
Described wire is arranged in the same circumferential plane of described metal mounting disc in the mode that parallel equidistant arranges, and the spacing between described wire is 0.5-3cm.
Described shaft coupling is made up of metal material, and skin is sprayed with insulated paint.
Described motor skin is sprayed with insulated paint or described motor is arranged in electrostatic screen device.
Described support and described base plate all adopt insulating materials to make.
Described metal blade is that parallel equidistant arrangement is arranged on described metal guide rod, and described metal blade is all with the knife edge, and spinning head is pointed in knife edge side.
Spacing range between described metal blade is 0.5-5cm.
Described metal guide rod skin is sprayed with insulated paint.
The technical solution adopted for the present invention to solve the technical problems is: also provide a kind of height-oriented collecting nanofibers method, uses above-mentioned height-oriented collecting nanofibers device, comprises the following steps:
(1) spinning solution is injected syringe, the outlet of syringe is connected with spinning head, and is fixed on by spinning head directly over the cylinder that is made up of described wire, is connected by positive pole high-pressure electrostatic output device with spinning head;
(2) open motor, drive the drum rotating be made up of one group of wire;
(3) positive pole high-pressure electrostatic output device and negative pole high-pressure electrostatic output device is opened;
(4) described metal blade is utilized to carry out concentrated electric field, reduce the bending unstability of jet, and utilize the electric capacity that described wire is formed each other, be stretching in by jet between wire, finally height-oriented nanofiber will be collected on the cylinder that is made up of wire.
Beneficial effect
Owing to have employed above-mentioned technical scheme, the present invention compared with prior art, has following advantage and good effect:
The cylinder cooperation collection oriented nanofibers that the present invention adopts one group of metal blade and is made up of one group of wire.One group of metal blade is equivalent to auxiliary electrode, all with the sharp knife edge, can concentrate electric field, effectively reduces the bending unstability of jet, improves the orientation of nanofiber; The electric capacity that one group of wire is formed each other, can be stretching in jet between wire, and then the effective orientation improving nanofiber, and reduces the rotating speed of motor.To sum up, the nanofiber Area comparison that this invention is collected is large, and Yield compari@is many, and efficiency comparison is high.In addition, structure of the present invention is simple and can realize the continuous seepage of Static Spinning oriented nanofibers.
Accompanying drawing explanation
Fig. 1 is the front view of height-oriented collecting nanofibers device;
Fig. 2 is the top view of height-oriented collecting nanofibers device;
Fig. 3 utilizes height-oriented collecting nanofibers device to carry out the structural representation of electrostatic spinning;
Fig. 4 is the scanning electron microscope diagram of the nanofiber mats utilizing height-oriented collecting nanofibers device to collect.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
The present invention relates to a kind of height-oriented collecting nanofibers device, as depicted in figs. 1 and 2, metal mounting disc 1, one group of wire 2, shaft coupling 3, motor 4, support 5, one group of metal blade 6, metal guide rod 7, support 8, base plate 9, earth connection 10 and negative pole high-pressure electrostatic output device 11 is comprised.One group of wire 2 arrangement in parallel equidistant, be arranged on the same circumferential plane interior composition cylinder of metal mounting disc 1, cylinder is connected with motor 4 by shaft coupling 3, drive rotation by motor 4, motor 4 is connected with earth connection 10, is equivalent to cylinder ground connection, therefore electric capacity is equivalent between adjacent two one metal wires 2, thus nanofiber can be made to produce orientation, and oriented nanofibers can be made as the cylinder rotates to cover whole cylinder area, increase the collection area of oriented nanofibers.One group of metal blade 6 is all connected with metal guide rod 7, and is positioned at drums inside, and metal guide rod 7 connects negative pole high-pressure electrostatic output device 11, is equivalent to one group of metal blade 6 and is all with high pressure negative electricity.Metal blade 6 parallel equidistant arranges, and all with the sharp knife edge, the spinning head of band high pressure positive electricity is all pointed in knife edge side, therefore, metal blade 6 is equivalent to auxiliary electrode, can concentrate electric field, effectively reduce the bending unstability of jet, improve the orientation of nanofiber.Under one group of metal blade 6 and the mating reaction of cylinder that is made up of one group of wire 2, effectively can reduce the rotating speed of cylinder, eliminate the shortcoming that air-flow that conventional method high speed cylinder surface produces interrupts fiber.
In addition, the skin of shaft coupling 3, motor 4 and metal guide rod 7 is all sprayed with insulated paint, support 5 and support 8, and base plate 9 all adopts insulating materials to make, and the motor 4 of index drum rotating speed adopts direct current supply, can effectively avoid having an impact to high voltage electric field.
Below the method using height-oriented collecting nanofibers device to carry out electrostatic spinning is described further, as shown in Figure 3, comprise the following steps: spinning solution 15 is injected syringe 12 by (1), the outlet of syringe 12 is connected with spinning head 13, and spinning head 13 is fixed on directly over the cylinder that is made up of one group of wire 2, positive pole high-pressure electrostatic output device 14 is connected with spinning head 13; (2) metal guide rod 7 is connect negative pole High voltage output device 11, be equivalent to one group of metal blade 6 and be with high pressure negative electricity, by motor 4 ground connection, be equivalent to the cylinder ground connection be made up of one group of wire 2; (3) open motor 4, drive the drum rotating be made up of one group of wire 2; (4) positive pole high-pressure electrostatic output device 14 and negative pole high-pressure electrostatic output device 11 is opened; (5) metal blade 6 is utilized to carry out concentrated electric field, reduce the bending unstability of jet 16, and utilize the electric capacity that wire 2 is formed each other, be stretching between wire by jet 16, finally height-oriented nanofiber will be collected on the cylinder that is made up of wire.
The solution adopting polyacrylonitrile (PAN) and dimethyl formamide (DMF) to prepare below carries out spinning.By concentration be 12% PAN solution inject syringe, the outlet of syringe is connected with spinning head, and is fixed on by spinning head directly over the cylinder that is made up of one group of wire, and vertical range is 15cm, is connected by positive pole high-pressure electrostatic output device with spinning head; Metal guide rod is connect negative pole High voltage output device, by motor ground connection; Open motor, arranging rotating speed is 50rmp; Open positive pole high-pressure electrostatic output device and negative pole high-pressure electrostatic output device, be set to+18kV and-0.5kV respectively; Height-oriented collecting nanofibers is on the cylinder be made up of wire, and diameter is about 593nm, and as shown in Figure 4, its multiplication factor is 3000 times.
Claims (9)
1. a height-oriented collecting nanofibers device, comprise metal mounting disc (1), wire (2), shaft coupling (3), motor (4), metal blade (6), metal guide rod (7) and negative pole high-pressure electrostatic output device (11), it is characterized in that, described wire (2) is arranged on described metal mounting disc (1) and forms cylinder; Described metal mounting disc (1) is connected with described motor (4) by shaft coupling (3), and drives rotation by described motor (4); Described metal guide rod (7) is distributed with metal blade (6), the metal guide rod (7) with metal blade (6) is positioned at the drums inside be made up of described wire (2); Described metal guide rod (7) is connected with described negative pole high-pressure electrostatic output device (11); Described wire (2) is arranged in the same circumferential plane of described metal mounting disc (1) in the mode that parallel equidistant arranges; Described metal blade (6) arranges in parallel equidistant and is arranged on described metal guide rod (7), and described metal blade (6) is all with the knife edge, and spinning head is pointed in knife edge side.
2. height-oriented collecting nanofibers device according to claim 1, is characterized in that, described motor (4) and metal guide rod (7) are fixed on base plate (9) respectively by support (5,8).
3. height-oriented collecting nanofibers device according to claim 1, is characterized in that, the spacing between described wire (2) is 0.5-3cm.
4. height-oriented collecting nanofibers device according to claim 1, is characterized in that, described shaft coupling (3) is made up of metal material, and skin is sprayed with insulated paint.
5. height-oriented collecting nanofibers device according to claim 1, is characterized in that, described motor (4) skin is sprayed with insulated paint or described motor (4) is arranged in electrostatic screen device.
6. height-oriented collecting nanofibers device according to claim 2, is characterized in that, described support (5,8) and described base plate (9) all adopt insulating materials to make.
7. height-oriented collecting nanofibers device according to claim 1, is characterized in that, the spacing range between described metal blade (6) is 0.5-5cm.
8. height-oriented collecting nanofibers device according to claim 1, is characterized in that, described metal guide rod (7) skin is sprayed with insulated paint.
9. a height-oriented collecting nanofibers method, is characterized in that, uses the height-oriented collecting nanofibers device as described in claim arbitrary in claim 1-8, comprises the following steps:
(1) spinning solution is injected syringe, the outlet of syringe is connected with spinning head, and is fixed on by spinning head directly over the cylinder that is made up of described wire, is connected by positive pole high-pressure electrostatic output device with spinning head;
(2) open motor, drive the drum rotating be made up of one group of wire;
(3) positive pole high-pressure electrostatic output device and negative pole high-pressure electrostatic output device is opened;
(4) described metal blade is utilized to carry out concentrated electric field, reduce the bending unstability of jet, and utilize the electric capacity that described wire is formed each other, be stretching in by jet between wire, finally height-oriented nanofiber will be collected on the cylinder that is made up of wire.
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| CN201310134672.7A CN103173874B (en) | 2013-04-17 | 2013-04-17 | High-orientation nanofiber collecting device and method |
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| CN201310134672.7A CN103173874B (en) | 2013-04-17 | 2013-04-17 | High-orientation nanofiber collecting device and method |
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| CN103173874B true CN103173874B (en) | 2015-07-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104711686B (en) * | 2015-03-04 | 2017-01-11 | 华侨大学 | Large-area batch manufacture device for ordered nanofibers |
| CN107938083B (en) * | 2018-01-05 | 2020-08-11 | 东华大学 | Device and method for uniformly distributing nano fibers in blended yarn system |
| CN110106598B (en) * | 2019-06-03 | 2024-02-02 | 北京化工大学 | Nanofiber preparation device for shearing and stretching under high-pressure field |
| CN114232116B (en) * | 2021-12-31 | 2022-09-13 | 武汉纺织大学 | Nanofiber winding and collecting device |
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