CN202099422U

CN202099422U - Ultrasonic oscillation electrostatic spinning nozzle

Info

Publication number: CN202099422U
Application number: CN2011201904908U
Authority: CN
Inventors: 覃小红; 王衍书; 吴韶华
Original assignee: Donghua University
Current assignee: Donghua University
Priority date: 2011-06-08
Filing date: 2011-06-08
Publication date: 2012-01-04
Anticipated expiration: 2021-06-08

Abstract

The utility model relates to an ultrasonic oscillation electrostatic spinning nozzle, which comprises a spinning nozzle and an ultrasonic processor. The ultrasonic processor comprises an amplitude transformer, a transducer and a controller. The top end of the amplitude transformer penetrates through the bottom of the spinning nozzle to be disposed inside the same. The bottom end of the amplitude transformer is connected with the transducer which is connected with the controller. The spinning nozzle is an open disc and provided with a binding post connected with a high-tension positive electrode. The ultrasonic oscillation electrostatic spinning nozzle has the advantages that surface tension of spinning solution or fusant is overcome, a plurality of jets are formed, yield of electrostatic spinning is increased, stability of nozzle spinning is enhanced, and continuous and large-scale production of nanofibers can be achieved.

Description

A kind of supersonic oscillations electrostatic spinning nozzle

Technical field

The utility model relates to the electrostatic spinning field, particularly relates to a kind of supersonic oscillations electrostatic spinning nozzle.

Background technology

Electrostatic spinning is a kind of straightforward procedure of at present popular manufacturing nanofiber, and, processing ease simple with its equipment, material source are extensively, technical process is not destroyed good characteristic such as material body has become the focus that the current research nanofiber is made.The prepared nanofiber of electrostatic spinning has characteristics such as diameter is little, specific area is big, in fields such as biomedicine, air filtration, protection clothings huge application potential is arranged all.

Electrostatic spinning is that charged drop forms taylor cone under the electric field force effect with on polymer solution or the melt band several thousand and even volt high-pressure electrostatic up to ten thousand, and when electric field force was enough big, electric field force can be bored point at taylor cone and overcome solution surface tension and form and spray thread.The refinement that under effects such as electric field force, viscosity resistance, surface tension, is stretched of charged polymer jet, simultaneously charged jet in electric field owing to existing surface charge to bend.Thread is solvent evaporation or melt curing in course of injection, finally drops on the receiving device, forms the nanofiber mats of similar nonwoven fabric.

It is this technology is moved towards the maximum of industrialization production and application from the laboratory technology barrier that electrostatic spinning yields poorly.The researcher is in order to improve the production efficiency of electrostatic spinning; The spinning nozzle device has been carried out more research; But adopt single syringe needle to solve this technology barrier mostly, therefore adopt single needle head or spininess scalp acupuncture cartridge type device for spinning, lean on mechanical force to promote extrusion solution or melt as spinning head or to its assembling; In electrostatic field, form taylor cone, to be spun into nanofiber be very general thereby withdrawing goes out one or more jet.Yet needle-based orifice diameter many places are in micron order, solidify the too fast spinneret orifice clogging that occurs because of solvent evaporates or melt easily, cause producing and interrupt, and then influence production efficiency, and easy care not.The unlimited upper quadrant spinning head of part scholar's research has improved the needle-based spinning head to a certain extent at present; But still exist a lot of not enough; Directly contact like polymer solution or melt, make polymer solution or bath surface viscous, cause the withdrawing difficulty owing to solvent evaporates or melt solidify with air; Be difficult to form stable jet under the same parameter condition, influence carrying out smoothly of spinning process.

Summary of the invention

The utility model technical problem to be solved provides a kind of supersonic oscillations electrostatic spinning nozzle, can overcome the shortcoming that the open type shower nozzle is difficult to form jet.

The utility model solves the technical scheme that its technical problem adopted: a kind of supersonic oscillations electrostatic spinning nozzle is provided, comprises spinning head and processor for ultrasonic wave, described processor for ultrasonic wave comprises horn, transducer and controller; Described horn top is passed described spinning head bottom surface and is inserted in the described spinning head; Described horn bottom links to each other with described transducer; Described transducer links to each other with described controller; Described spinning head is the open type disk, and described spinning head is provided with the binding post that links to each other with the high pressure positive electrode.

Described electrostatic spinning nozzle also comprises radome; Described horn is divided into the first half and the latter half; The first half of described spinning head and described horn is arranged on the top of described radome; The latter half of described horn and transducer are arranged on the radome below.

Described spinning head adopts copper material to process.

Described spinning head bottom centre place is provided with a hole, and described hole is passed on described horn top, and to insert described spinning head inner; The axis of symmetry of described spinning head and described horn overlaps; The bottom surface hole wall of the outer wall of described horn and described spinning head leaves the space.

The diameter of described hole is 25cm; Described space is 0.05-0.1mm.

The first half of described horn adopts insulating resin to process; The latter half of described horn adopts metal material to process.

Beneficial effect

Owing to adopted above-mentioned technical scheme; The utility model compared with prior art; Have following advantage and good effect: the utility model utilizes ultrasonic wave that solution or the melt that is injected in the spinning head end vibrated, and makes solution be in the dynamic flow state, and the inwall tip edges electric-field intensity of adding copper spinning head is maximum; The surface tension that can under same voltage effect, overcome spinning solution or melt forms many jets; Increase the output of electrostatic spinning, improved the stability of shower nozzle spinning, can realize the continuous and large-scale production of nanofiber.The spinning head that adopts in the utility model is to open wide the copper shower nozzle of upper quadrant needleless hair style, has avoided the generation of needle head structure device clogging, need not frequent change and cleans spinneret orifice, has improved production efficiency greatly, and has used the back to clean easily.

Description of drawings

Fig. 1 is the electrostatic spinning nozzle sketch map of the utility model embodiment 1;

Fig. 2 is the spinning head aerial view of the utility model embodiment 1;

Fig. 3 is the electrostatic spinning nozzle sketch map of the utility model embodiment 2.

The specific embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Embodiment 1: present embodiment relates to a kind of supersonic oscillations electrostatic spinning nozzle, and is as shown in Figure 1, comprises spinning head 1 and processor for ultrasonic wave, and wherein, processor for ultrasonic wave comprises horn 2, transducer 3 and controller 4.Horn 2 tops are passed spinning head 1 bottom surface and are inserted in the spinning head 1, and horn 2 bottoms link to each other with transducer 3.Transducer 3 links to each other with controller 4, and spinning head 1 is provided with the binding post 6 that links to each other with high pressure positive electrode 5, and spinning head 1 can be directly connected high pressure positive electrodes 5 through binding post 6, for spinning solution or melt uniform charged provide condition.Controller 4 control ultrasonic pulse state and ultrasonic times; Thereby make the spinning solution or the melt that inject in the spinning head 1 produce vibration; Make solution or melt be in the dynamic flow state; High-pressure electrostatic after the match spinning solution or melt overcome surface tension and induce and form a plurality of taylor cones, and then form many jets.

As shown in Figure 2, spinning head 1 is the open type disk, has avoided the generation of needle head structure device clogging, need not frequent change and cleans spinneret orifice, has improved production efficiency greatly, and has used the back to clean easily.Spinning head 1 adopts copper material to process; Because conducting electricity very well of copper reduced energy loss, on the other hand; ABC according to electric field can be known; The inwall tip edges electric-field intensity of spinning head 1 is maximum, and the surface tension that overcomes spinning solution or melt more easily forms jet, increases the output of electrostatic spinning.As shown in Figure 2, spinning head 1 bottom centre place is provided with the hole that a diameter is 25cm, and horn 2 tops are passed the center hole of spinning head bottom and inserted spinning head 1 inside; Thereby ultrasonic wave is imported in the spinning head 1 through horn 2 tops; And to spinning solution in the spinning head 1 or melt generation oscillation action, on the other hand, the axis of symmetry of horn 2 and spinning head 1 overlaps; And the bottom surface circular hole wall of the outer wall of horn 2 and spinning head 1 leaves microvoid; The scope of this microvoid has certain viscosity owing to be used for the solution or the melt of electrostatic spinning, and is in continuous oscillatory regime between 0.05-0.1mm; And the space between the bottom surface circular hole wall of the outer wall of horn 2 and spinning head 1 is in the 0.05-0.1mm scope; Can avoid spinning solution or melt from the space, to flow out to the full extent, thereby can prevent processor for ultrasonic wave when operation, cause oscillation amplitude change because of the hole wall of horn 2 vibrations and spinning head 1 bottom surface comes in contact.

The ultrasonic wave that controller produces is that frequency is higher than 20000 hertz sound wave, and wavelength is short, in certain distance, has good beam property and directionality along straightline propagation.Hyperacoustic propagation itself is exactly a kind of mechanical oscillation pattern, is referred to as mechanical effect.When ultrasonic wave is propagated in liquid, because the high vibration of liquid particle can produce little cavity at liquid internal.These little cavities swell rapidly and are closed, can make the fierce effect of impact of generation between the liquid particle, thereby produce several thousand to up to ten thousand atmospheric pressure.This violent interaction between particulate can make the temperature of liquid raise suddenly, has played good stirring action, is thisly acted on by ultrasonic wave that caused various effects are called cavitation effect of ultrasonic waves in the liquid.The utility model uses controller control ultrasonic pulse state and ultrasonic time; Utilize hyperacoustic mechanical effect and cavitation; Spinning solution or melt to injecting in the spinning head produce vibration; Make solution or melt be in the dynamic flow state, high-pressure electrostatic after the match spinning solution or melt overcome surface tension and induce and form a plurality of taylor cones, and then form many jets.

Embodiment 2: present embodiment relates to a kind of supersonic oscillations electrostatic spinning nozzle equally, and present embodiment is roughly identical with embodiment 1, and its difference is that the related electrostatic spinning nozzle of present embodiment also comprises radome 7.Horn 2 is divided into the first half and the latter half, and the first half of spinning head 1 and horn 2 is arranged on the top of radome 7, and the latter half of horn 2 and transducer 3 are arranged on the radome below.Wherein, the first half of horn 2 adopts insulating resin (like polyvinyl chloride resin, EVA resin etc.) to process, and the latter half of horn 2 adopts metal material (like copper, silver etc.) to process.Through outside horn 2 and transducer 3, installing radome additional, the maskable electric field is to the interference of electrostatic spinning in the present embodiment, thus the quality of assurance electrostatic spinning.

Introduce below and how to utilize embodiment 2 described supersonic oscillations electrostatic spinning nozzles to carry out spinning, it is 10% polyvinyl alcohol (PVA) aqueous solution that solution is selected mass concentration for use, and spinning solution injects spinning head through automatic infusion device; The spinning solution liquid measure of keep injecting be higher than horn top horizontal plane a little, receive base cloth and remain on 20cm, opening controller with spacing on the spinning head; The time of opening starts/closes button; Setting-up time 30min selects the continuous ultrasound state, and the voltage of high pressure positive electrode is transferred to 60kV; Base cloth is with the translation of 0.01m/min speed, and the dolly that carries spinning head moves reciprocatingly.The diameter of the nanofiber mats that produces is about 30cm, and fibre diameter is about 260nm, and Gram Mass is about 1.2g/m ²

Claims

1. a supersonic oscillations electrostatic spinning nozzle comprises spinning head (1) and processor for ultrasonic wave, it is characterized in that, described processor for ultrasonic wave comprises horn (2), transducer (3) and controller (4); Described horn (2) top is passed described spinning head (1) bottom surface and is inserted in the described spinning head (1); Described horn (2) bottom links to each other with described transducer (3); Described transducer (3) links to each other with described controller (4); Described spinning head (1) is the open type disk, and described spinning head (1) is provided with the binding post (6) that links to each other with high pressure positive electrode (5).

2. supersonic oscillations electrostatic spinning nozzle according to claim 1 is characterized in that, described electrostatic spinning nozzle also comprises radome (7); Described horn (2) is divided into the first half and the latter half; The first half of described spinning head (1) and described horn (2) is arranged on the top of described radome (7); The latter half of described horn (2) and transducer (3) are arranged on radome (7) below.

3. supersonic oscillations electrostatic spinning nozzle according to claim 1 and 2 is characterized in that, described spinning head (1) adopts copper material to process.

4. supersonic oscillations electrostatic spinning nozzle according to claim 1 and 2 is characterized in that, described spinning head (1) bottom centre place is provided with a hole, and described horn (2) top is passed described hole and inserted described spinning head (1) inside; Described spinning head (1) overlaps with the axis of symmetry of described horn (2); The bottom surface hole wall of the outer wall of described horn (2) and described spinning head (1) leaves the space.

5. supersonic oscillations electrostatic spinning nozzle according to claim 4 is characterized in that, the diameter of described hole is 25cm; Described space is 0.05-0.1mm.

6. supersonic oscillations electrostatic spinning nozzle according to claim 2 is characterized in that, the first half of described horn (2) adopts insulating resin to process; The latter half of described horn (2) adopts metal material to process.