CN101363137A - Electrostatic spinning device for preparing directional arrangement nano fiber - Google Patents
Electrostatic spinning device for preparing directional arrangement nano fiber Download PDFInfo
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- CN101363137A CN101363137A CNA2008100703641A CN200810070364A CN101363137A CN 101363137 A CN101363137 A CN 101363137A CN A2008100703641 A CNA2008100703641 A CN A2008100703641A CN 200810070364 A CN200810070364 A CN 200810070364A CN 101363137 A CN101363137 A CN 101363137A
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Abstract
The invention relates to an electrostatic spinning device which is used for preparing direction arrangement nanofibers. The device comprises a high voltage source, an injector, an ejector jet pump which pushes the injector and a gathering unit, wherein, the high voltage source which is connected with the position of an injector pinhead is anode; the gathering unit which is ground connection by an earth wire is cathode; the device is characterized in that the gathering unit is an open fiber gathering device which consists of two parts of a performance element and a control unit; wherein, the performance element is an open roller which is formed by a centre pivot and a copper pipe which is parallel to the centre pivot, the two ends of the copper pipes are fixed on the periphery of an aluminum subpanel; the roller has a copper centre pivot; the control unit comprises a driving motor and a rotary speed controller; the motor drives the roller to rotate by a shaft joint; the motor shields the disturbance of electric field by a shield cover; the rotary speed controller controls the rotate speed of the motor, and the rotate speed is 800-1000rpm; the performance element and the control unit are all supported by a PVP plate. The produced nanofibre has the advantages of good order and thick film, and is suitable for biomedicine support materials.
Description
Technical field
The present invention relates to the electrospinning of directional arrangement nano fiber, is a kind of electrostatic spinning apparatus for preparing directional arrangement nano fiber.
Background technology
Electrospinning (Electrospinning) is that polymer solution or melt spray stretching and the technology of acquisition nano-scale fiber under electrostatic interaction, be about to high direct voltage and put between polymer solution or solution and the gathering-device, make on polymer solution or the melt band several thousand to volt high-pressure electrostatics up to ten thousand.When electric field force was enough big, charged polymer drop overcame surface tension and forms the injection thread.Thread solidifies with the solvent evaporation in course of injection, finally drops on the gathering-device, forms the fibrofelt of similar non-weaving cloth, and its nanofiber diameter is generally between tens nanometers are to several microns.
1934, U.S. engineer A.Formhals realized the electrospinning silk of cellulose acetate (CA) solution under the effect of electrostatic force, thereby had applied for this patent of electrospinning process (A.Formhals, US patent 1975504,1934) first; Subsequently in succession also the someone study; After the eighties in 20th century, especially nearly 10 years, along with the development of nanometer technology, electrostatic spinning technique received much attention, and studied more.The D.H.Reneker[11 of U.S. University of Akron at the beginning of 20th century 90] etc. electrostatic spinning has been carried out a large amount of experimental works and deep theoretical research, developed new technology---the electrostatic spinning technique of preparation nanofiber.H.Fong etc. have studied the formation of electrostatic spinning nano fiber, and the process of labor jet changes.Current, electrostatic spinning has become one of main preparation methods of nanofiber; At home, existing at present a lot of colleges and universities and research institution adopt method of electrostatic spinning, spinning nanofiber polyacrylonitrile fibre felt, and the polycaprolactone nanofiber, polylactic acid nano fiber, or the like.
Electrostatic spinning apparatus mainly contains four parts and forms: high voltage source, solution storage device, injection apparatus and receiving system.It is that the high direct voltage electrostatic generator of 30kV～100kV produces the high-voltage electrostatic field that high voltage source generally adopts maximum output voltage; The solution storage device uses glass syringe or liquid storage pipe etc. usually, and polymer solution or melt wherein are housed, and connects a syringe pump with control solution injection rate to syringe, inserts a metal electrode that links to each other with high voltage source sometimes for making liquid charged; Injection apparatus is capillary or the syringe needle of 0.5～2mm; Receiving system can take different shapes according to different requirements, can be metal plate, grid etc.Injection apparatus and receiving system can be vertical, level or angled placement.
Nanofiber polyacrylonitrile fibre felt, polycaprolactone nanofiber, polylactic acid nano fiber etc. at present extensively in the laboratory as the cytoskeleton material, but be lack of alignment by the nanofiber that obtains of said apparatus production.Yet in the inoculating cell process, cell is creeped along the direction of nanofiber silk, and is arranged with preface, so cell has bigger difference to the biological response in the corresponding and body of the biology of this material.The timbering material that how to obtain to have certain orientation is a problem demanding prompt solution.
Electrostatic spinning technique provides new approaches for the directional collecting of nanofiber.In electrostatic spinning technique, one of critical problem is how to realize the directional collecting of nanofiber.If gathering-device is a static flat board, the nanofiber that obtains must be a lack of alignment, and its using value of the nanofiber of this lack of alignment reduces greatly.If gathering-device rotates at a high speed, then can address this problem effectively.
Summary of the invention
The purpose of this invention is to provide a kind of electrostatic spinning apparatus for preparing directional arrangement nano fiber, make the nanofiber directionality of preparing good, and cost is low.
The technical scheme that realizes the object of the invention and adopt is such: promptly a kind of electrostatic spinning apparatus for preparing directional arrangement nano fiber comprises high voltage source, the syringe of the high direct voltage that produces 10kV～100kV, the syringe pump and the gathering-device of pushing syringe; Wherein high voltage source is connected in the syringe needle position, is positive pole; Gathering-device is negative pole by ground connection; It is characterized in that: described gathering-device is open fiber collecting device, it is made up of performance element and control module two parts: performance element is open cylinder, is made of copper central rotating shaft and parallel with it and copper pipe that two ends are fixed on the aluminium matter mounting disc circumference; Control module comprises drive motors and rotational speed governor, and motor drives cylinder by shaft coupling and rotates, and motor disturbs with the radome electric field shielding, rotational speed governor control motor speed, and the control rotating speed is 800～1000rpm; Performance element and control module support by the PVP plate.
The present invention adopts open fiber collecting device to be positioned at the place ahead of syringe needle; The present invention can produce continuous orientated nano fibers, and these directional fibers are arranged in parallel along with the rotation of cylinder.Therefore, the present invention has the following advantages:
(1) the nanofiber order of producing is good;
(2) technology is simple, good reproducibility;
(3) adopt open cylinder, the width easy to use of the spacing between the copper pipe is that about 2 centimetres cell growth is gathered with slide.
(4) the nanofiber thickness of Sheng Chaning is applicable to and does biomedical timbering material.
Description of drawings
Fig. 1 is the structural representation of preparation facilities of the present invention.
Fig. 2 is the structural representation of open fiber collecting device in the preparation facilities of the present invention.
Fig. 3 is the side view of open cylinder;
The orientated nano fibers micrograph that Fig. 4 produces for preparation facilities of the present invention (400 times);
The orientated nano fibers sem photograph that Fig. 5 produces for preparation facilities of the present invention;
The orientated nano fibers pictorial diagram that Fig. 6 produces for preparation facilities of the present invention.
A. syringe among the figure, 1. aluminium matter mounting disc, 2. copper pipe 3. central rotating shafts, 4. high voltage source, 5, earth connection, 6. rolling bearing, 7. support, 8. shaft joint, 9. 10. drive motors, 11. controllers, 12.PVP plate of radome (preventing that motor is disturbed by electric field).
The specific embodiment
The embodiment that the present invention prepares the indefiniteness that the electrostatic spinning apparatus of directional arrangement nano fiber can provide by accompanying drawing further specifies.
As shown in Figure 1, device comprises high voltage source 4, the syringe A of the high direct voltage that produces 10kV～100kV, the syringe pump and the gathering-device of pushing syringe; Wherein high voltage source is connected in the syringe needle position, is positive pole; Gathering-device is negative pole by earth connection 5 ground connection; It is characterized in that: described gathering-device is open fiber collecting device, it is made up of performance element and control module two parts: performance element is open cylinder, be made of central rotating shaft and parallel with it and copper pipe 2 that two ends are fixed on aluminium matter mounting disc 1 circumference, described cylinder has copper central rotating shaft 3; Control module comprises drive motors 10 and rotational speed governor, and motor drives cylinder by shaft coupling 8 and rotates, and motor disturbs with radome 9 electric field shieldings, rotational speed governor control motor speed, and the control rotating speed is 800～1000rpm; Performance element and control module support by PVP plate 12.
30～100kV high direct voltage is put between polymer solution or solution and the gathering-device, make on polymer solution or the melt band several thousand to volt high-pressure electrostatics up to ten thousand.Under the effect of electric field force, the polymer solution surface among the syringe A produces electric charge.Electric charge repels the compression with opposite charges electrode pair surface charge mutually, all can directly produce a kind of power opposite with surface tension.When electric-field intensity increased, the fluid hemisphere surface of syringe needle can be drawn as taper, i.e. the Taylor awl.Further increase electric-field intensity, make to be used for overcoming critical value of capillary electrostatic repulsion forces arrival, promptly when electric field force was enough big, charged jet ejected from Taylor awl point.Spray thread and in course of injection, solidify, finally drop on the collected in drums device with the solvent evaporation.Directional collecting is realized on the surface that is wrapped in cylinder (referring to accompanying drawing 4,5,6) parallel to each other when drum rotation speed equates with fiber movement speed.Directly place between two copper pipes, be bonded on the slide, make things convenient for cell seeding to use through shearing to make to align at the nanofiber on the cylinder with slide.
The method embodiment that utilizes aforementioned means to prepare directional arrangement nano fiber is provided below:
1, the preparation of PLLA (Poly-L-lactic acid) orientated nano fibers.
PLLA is dissolved in the carrene, and concentration range is 3-15% (w/v%).During enforcement, select concentration 10% (w/v%) for use, pour into spinning in the syringe after 4 hours with magnetic stirrer, the spinning voltage scope is 10-25kV.
2, the preparation of PAN (polypropylene is fine) directional fiber.
PAN is dissolved in the dimethyl formamide with the concentration of 7-15% (w/v%), selects concentration 12% (w/v%) during enforcement for use, pour into spinning behind the syringe after 12 hours with magnetic stirrer, the spinning voltage scope is 10-35kV.
The above, it only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, all equalizations of being done according to the described shape of claim scope of the present invention, structure etc. change and modify, and all should be included in the claim scope of the present invention.
In the embodiment that accompanying drawing provides, the two ends of copper pipe 2 equidistantly are fixed on aluminium matter mounting disc 1 circumference in the described open cylinder, and described spacing is 2～3 centimetres.
One end of described open cylinder is connected with shaft joint 8, and the other end is installed on the support 7 by rolling bearing, and earth connection 5 is electrically connected on the copper pipe by support 7, central rotating shaft 3 and mounting disc 1.
Between described central rotating shaft 3 and the support 7, revealed section has PVP material wrap insulate layer between central rotating shaft 3 and the shaft joint 8.
Claims (4)
1, a kind of electrostatic spinning apparatus for preparing directional arrangement nano fiber comprises high voltage source (4), the syringe (A) of the high direct voltage that produces 10kV～100kV, the syringe pump and the gathering-device of pushing syringe; Wherein high voltage source is connected in the syringe needle position, is positive pole; Gathering-device is negative pole by earth connection (5) ground connection; It is characterized in that: described gathering-device is open fiber collecting device, it is made up of performance element and control module two parts: performance element is open cylinder, is made of copper central rotating shaft (3) and copper pipe (2) parallel with it and that two ends are fixed on aluminium matter mounting disc (1) circumference; Control module comprises drive motors (10) and rotational speed governor, and motor drives cylinder by shaft coupling (8) and rotates, and motor disturbs with radome (9) electric field shielding, rotational speed governor control motor speed, and the control rotating speed is 800～1000rpm; Performance element and control module support by PVP plate (12).
2, the electrostatic spinning apparatus of preparation directional arrangement nano fiber according to claim 1 is characterized in that: the two ends of copper pipe (2) equidistantly are fixed on aluminium matter mounting disc (1) circumference in the described open cylinder, and described spacing is 2～3 centimetres.
3, the electrostatic spinning apparatus of preparation directional arrangement nano fiber according to claim 1, it is characterized in that: an end of described open cylinder is connected with shaft joint (8), the other end is installed on the support (7) by rolling bearing, and earth connection (5) is electrically connected on the copper pipe (2) by support (7), central rotating shaft (3) and mounting disc (1).
4, the electrostatic spinning apparatus of preparation directional arrangement nano fiber according to claim 1 is characterized in that: between central rotating shaft (3) and the support (7), revealed section has PVP insulated with material integument between central rotating shaft and the shaft joint (8).
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| CNA2008100703641A CN101363137A (en) | 2008-09-24 | 2008-09-24 | Electrostatic spinning device for preparing directional arrangement nano fiber |
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| CNA2008100703641A CN101363137A (en) | 2008-09-24 | 2008-09-24 | Electrostatic spinning device for preparing directional arrangement nano fiber |
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Cited By (22)
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| CN101857976A (en) * | 2010-05-19 | 2010-10-13 | 青岛大学 | Device for preparing nano fibers with ordered arrangement and cross structures |
| CN101985793A (en) * | 2010-11-22 | 2011-03-16 | 北京化工大学 | Device for preparing non-woven fabric product continuously with electrostatic spinning method |
| CN102031574A (en) * | 2011-01-19 | 2011-04-27 | 哈尔滨工业大学 | Electrostatic spinning equipment and method thereof for preparing one-dimensional ordered PAMPS (2-Acrylamide-2-methylpro panesulfonic acid)/PNIPAAm (Poly(N-Isoprolacrylamide)) micro-nanofibers |
| CN102304779A (en) * | 2011-07-26 | 2012-01-04 | 东华大学 | In-situ receiving device and method for representing nano micro-fiber forming process |
| CN102358959A (en) * | 2011-08-16 | 2012-02-22 | 中山大学 | Method and device for preparing electrospinning fiber bracket with three-dimensional structure |
| CN102425012A (en) * | 2011-09-26 | 2012-04-25 | 西安工程大学 | Method for preparing oriented micro/nano fiber by utilizing electrostatic spinning process |
| CN102525689A (en) * | 2010-12-20 | 2012-07-04 | 上海市第六人民医院 | Orientated nano fiber bionic nerve conduit and manufacturing method thereof |
| CN103173874A (en) * | 2013-04-17 | 2013-06-26 | 东华大学 | High-orientation nanofiber collecting device and method |
| CN103334168A (en) * | 2013-07-24 | 2013-10-02 | 苏州大学 | Receiving device of electrostatic spinning |
| CN103687984A (en) * | 2011-06-27 | 2014-03-26 | 康迪普罗生物技术公司 | Method for producing a material with anisotropic properties consisting of nanofibres or microfibres and device for implementing said method |
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| EP2971292A4 (en) * | 2013-03-14 | 2016-11-02 | Lifenet Health | Electrospinning apparatus and methods of use thereof |
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| CN101857976B (en) * | 2010-05-19 | 2011-06-08 | 青岛大学 | Device for preparing nano fibers with ordered arrangement and cross structures |
| CN101857976A (en) * | 2010-05-19 | 2010-10-13 | 青岛大学 | Device for preparing nano fibers with ordered arrangement and cross structures |
| CN101985793A (en) * | 2010-11-22 | 2011-03-16 | 北京化工大学 | Device for preparing non-woven fabric product continuously with electrostatic spinning method |
| CN101985793B (en) * | 2010-11-22 | 2012-07-25 | 北京化工大学 | Device for preparing non-woven fabric product continuously with electrostatic spinning method |
| CN102525689B (en) * | 2010-12-20 | 2015-06-24 | 上海市第六人民医院 | Orientated nano fiber bionic nerve conduit and manufacturing method thereof |
| CN102525689A (en) * | 2010-12-20 | 2012-07-04 | 上海市第六人民医院 | Orientated nano fiber bionic nerve conduit and manufacturing method thereof |
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| CN102358959A (en) * | 2011-08-16 | 2012-02-22 | 中山大学 | Method and device for preparing electrospinning fiber bracket with three-dimensional structure |
| CN102425012A (en) * | 2011-09-26 | 2012-04-25 | 西安工程大学 | Method for preparing oriented micro/nano fiber by utilizing electrostatic spinning process |
| EP2971292A4 (en) * | 2013-03-14 | 2016-11-02 | Lifenet Health | Electrospinning apparatus and methods of use thereof |
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| CN106435772A (en) * | 2016-10-21 | 2017-02-22 | 上海工程技术大学 | Method and device for preparing nano fiber by using electrostatic method |
| CN106498512B (en) * | 2016-11-24 | 2019-02-15 | 广东工业大学 | A kind of adjustable electrostatic spinning syringe needle and its implementation |
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Open date: 20090211 |