CN100410429C - Electrostatic spinning apparatus with multi-spraying heads for preparing coaxial composite continuous nanometer/micron fibre - Google Patents

Electrostatic spinning apparatus with multi-spraying heads for preparing coaxial composite continuous nanometer/micron fibre Download PDF

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Publication number
CN100410429C
CN100410429C CNB2003101092229A CN200310109222A CN100410429C CN 100410429 C CN100410429 C CN 100410429C CN B2003101092229 A CNB2003101092229 A CN B2003101092229A CN 200310109222 A CN200310109222 A CN 200310109222A CN 100410429 C CN100410429 C CN 100410429C
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China
Prior art keywords
flow container
liquid
nozzle
coaxial
low head
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Expired - Fee Related
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CNB2003101092229A
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Chinese (zh)
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CN1546753A (en
Inventor
黄争鸣
董国华
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Tongji University
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Tongji University
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

The present invention relates to an electrostatic spinning device with multiple spray heads, which is used for preparing coaxial composite continuous nanometer/ micrometer fibers. The present invention is composed of main parts, such as an internal liquid tank, an external liquid tank, sealing heads for the liquid tanks, more than one coaxial spray pipe, a liquid supply system, a flow guide pipe, electric conducting sticks, an electrostatic generator, etc., wherein each spray head contains an internal hollow thin spray pipe and an external hollow thin spray pipe; the internal spray pipes and the external spray pipes are coaxial; the internal spray pipes are arranged on the lower sealing head of the internal liquid tank and are spray outlets for internal liquid; the external spray pipes are arranged on the lower sealing head of the external liquid tank and are spray outlets for external liquid; the electric conducting sticks in the internal liquid tank and the external liquid tank are communicated with the electrostatic generator; high-voltage DC electric fields are respectively added in internal liquid material and external liquid material which are driven to be sprayed from respective jet pipe so as to form a plurality of concentric layer jet streams; the constant-pressure liquid supply system guarantees the jetted jet streams to be uniform and continuous; the jet streams are drawn at a high frequency, bent and whipped to deform, and solidified to simultaneously form a plurality of continuous coaxial composite nanometer/ micrometer fibers.

Description

The multi-nozzle electrospinning device for preparing coaxial compound continuous nano/micron fiber
Technical field
The present invention relates to a kind of nano micron fibre material preparation device, specifically is a kind of many ejecting devices of electrostatic spinning that prepare coaxial compound continuous nano/micron fiber.
Background technology
Two kinds of materials is coaxial compound rather than mix and be combined into a kind of bar or filamentary material, can satisfy numerous demands of industrial cut stock or daily life aspect.Most typical is pencil, top layer and core matter be two kinds of different materials coaxial compound be a bar.When the diameter of this coaxial coupled pole line reached several microns or the following magnitude of micron, its Application Areas was then very extensive.Although existing many maturation process and device aspect the preparation of the coaxial coupled pole line (such as pencil) of large scale, yet this class device also is not suitable for the preparation of ultra-fine (the following magnitude of several microns to micron) coaxial composite fibre.By the spinning means in the conventional textile industry such as dry method or the resulting fibre diameter of wet spinning device generally also all more than 7 microns, and fiber generally all is that the mixing of single or multiple material is compound.In the application of considering such as the coated cloth of burned body, the fiber of more tiny diameter will help the rapid degraded and absorbed of organism and the controlled release of antibiotic medicine.This is because the surface fibre that contact with wound face, and it is degraded fully and finish within the time of relatively lacking.This just requires the filametntary diameter must be very tiny, reaches the following or nanometer scale of micron.
The single nozzle electrospinning device imagination that has proposed the continuous coaxial composite fibre of preparation nanometer scale is arranged at present.But the device for spinning efficient of single shower nozzle is not high.Up at present, also do not find many ejecting devices of the continuous coaxial composite superfine of preparation (diameter is that micron is following to several micron orders) fiber.
Summary of the invention
The present invention gets purpose and is to provide the coaxial compound continuous nano/micron fiber of a kind of preparation to get the multi-nozzle electrospinning device.
The present invention proposes to such an extent that the coaxial compound continuous nano/micron fiber of preparation gets the multi-nozzle electrospinning device and is made up of interior flow container, outer flow container, interior flow container end socket, outer flow container end socket, bull combination spray pipe, liquid-supplying system, mozzle, contact rod, electrostatic generator.Each shower nozzle all contains inside and outside two hollow thin jet pipes, and wherein inner nozzle and outer nozzle are coaxial.In being arranged in, all inner nozzles on the low head of flow container, are the jet exit of interior liquid; All outer nozzles all are arranged on the low head of outer flow container, are the jet exit of outer liquid.Contact rod in the inside and outside flow container and electrostatic generator are connected, and the DC electric field that adds high pressure in inside and outside fluent material respectively drives two liquid from spraying the jet pipe separately, forms many concentric layering jets, solidifies and changes composite ultrafine fiber into.
The present invention is that (application number: 200310108130.9) She Ji " the multi-nozzle electrospinning device for preparing coaxial compound continuous nano/micron fiber " makes continuously a large amount of production become possibility at Chinese patent application " coaxial compound continuous nano/micron fiber and preparation method thereof " specially.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a flow container low head sectional view in Figure 1A-A.
Fig. 3 is a flow container low head sectional view in Figure 1B-B.
Label declaration in the accompanying drawing
Flow container in the 1-; The outer flow container of 2-;
Flow container upper cover in the 3-; Flow container low head in the 4-;
The outer flow container low head of 5-; The 6-seal;
The outer flow container upper cover of 7-; 8-spacing adjusting nut;
9-bull combination spray pipe; Liquid in the 10-;
The outer liquid of 11-; The 12-electrostatic generator;
The 13-fluid reservoir; The 14-return duct;
The 15-infusion pump; The 16-woven hose;
17-infuses jar; The quick formula pipe joint of 18-;
The quick formula union elbow of 19-; The 20-contact rod;
The 21-set bolt; 22-gap step;
23-water conservancy diversion hole slot; 24-rectangle guide groove;
The 25-pulsometer; The 26-control valve;
The 27-Pressure gauge; 28-air pressure liquid-supplying system;
29-hydraulic pressure liquid-supplying system.
The specific embodiment
The present invention places outer flow container 2 by an interior flow container 1 is coaxial, interior flow container upper cover 3 and low head 4, outer flow container upper cover 7 and low head 5, bull combination spray pipe 9, inside and outside jet pipe spacing adjusting nut 8, contact rod 20, set bolt 21, seal 6, transfusion official 16, pipe joint 18 and 19, electrostatic generator 12I, 12II, and air pressure liquid-supplying system 28 or hydraulic pressure liquid-supplying system 29 compositions.
Be described further below in conjunction with accompanying drawing:
Interior liquid 10 places in the interior flow container 1, outer liquid 11 places in the outer flow container 2, interior liquid 10 and outside be mounted with contact rod 20 or conductive coil respectively in the liquid 11, connect with dc static generator 12I and 12II separately, or parallel connection is switched to same electrostatic generator 12, and the DC voltage that electrostatic generator 12 provides is between 2kV～100kV; Flow container upper cover 3 and outer flow container upper cover 7 in contact rod 20 passes respectively, (I and II) is connected with electrostatic generator 12, when the electric-field intensity in being applied to inside and outside liquid 10,11 is identical, also available same electrostatic generator 12.
Interior flow container 1 and outer flow container 2 all each have a low head 4,5, wherein, the profile of interior flow container low head 4 bottoms is a rectangle, see the A-A sectional view of Fig. 2, realize closely cooperating with the rectangle guide groove 24 in the outer flow container low head, be convenient to the bull inner nozzle and can effectively locate assembling with corresponding outer nozzle, form coaxial bull jet pipe 9, for this reason, fit clearance between interior flow container rectangle low head and the rectangle guide groove 24 should be the smaller the better, but want to make between the two and can slide relatively, this gap generally is controlled between 0.001mm～0.2mm, on interior flow container low head 4, has several pod apertures or groove 23, its effect is: after interior flow container low head closely inserts rectangle guide groove 24, and can be with the liquid guide flow in the outer flow container to the outer nozzle mouth.Therefore, if on interior flow container low head 4, do not offer pod apertures or groove 23, then have pod apertures or groove on the flow container low head 5 outside.In the plane of interior flow container low head 4, be drilled with some pores (5 holes are arranged on the A-A cross section of Fig. 2), so that fixing inner nozzle, the extension of inner nozzle (pass low head thickness after length) is generally 1～50mm, internal diameter is generally 0.1mm～1.2mm, and the diameter of pore is the outer through being generally 0.2mm～1.6mm of inner nozzle.
Outside on the flow container low head 5, have rectangle guide groove 24, pod apertures or groove 23, leave gap step 22, and in the rectangular channel plane, be drilled with some pores (being 5 holes among Fig. 3), so that fixing outer nozzle, the extension of outer nozzle (pass low head thickness after length) is generally 1～50mm, internal diameter is generally 0.3mm～2.0mm, the diameter of pore is the outer warp of outer nozzle, be generally 0.5mm～2.5mm, the number of pore and center must be consistent with the number and the center of the pore that bored on the interior flow container low head 3.The function of rectangle guide groove 24 internal clearance steps 22 is: isolate the gap between the low head of interior flow container and all outer nozzle inlet, so that outer fluid can successfully flow into outer nozzle.
Outer flow container is provided with upper cover 7, have centre bore coaxial with interior flow container, that also internal flow container plays the guide-localization effect on it, gap between centre bore and the interior flow container outer wall is the smaller the better, but make between the two and can produce relative slip, generally, this gap remains within 0.001mm～0.2mm.In addition, can also have some seal grooves as required on the upper cover 7, so as to install, fixing seals 6.Metal conductive bar 20 also is to pass from upper cover 7, enter outer liquid, certainly, contact rod 20 also can pass the sidewall of outer flow container, enter outer liquid, no matter pass upper cover or sidewall, metal conductive bar or line 20 generally should have insulating coating parcel and sealing fully when passing through, and liquid must not ooze out from pass through the hole.
Flow container upper cover end face outside, be provided with interior flow container outer wall on the adjusting nut 8 of threads engaged, in making flow container mutually externally flow container can produce and relatively move, thereby regulate the exit separation of inside and outside jet pipe, reach the purpose of adjusting spinning parameter.
Interior flow container then can be provided with upper cover 3 as required, if stored interior liquid 10 enough spinning are used and need not injection pressure in liquid (only depending on electric field force to drive liquid from interior spray jar ejaculation) in the interior flow container, then need not to be provided with upper cover 3, otherwise will be provided with.At this moment, need to have seal groove in the upper cover 3, outer top is provided with pipe joint 18, so that connect with the constant pressure liquid stream of liquid-supplying system output.Metal conductive bar or line 20 pass from upper cover 3, enter interior liquid, and when passing through, contact rod or line 20 generally have insulating coating parcel and sealing fully, and liquid must not ooze out from pass through the hole.
Outer flow container is provided with pipe joint 19 as required, if liquid 11 enough spinning stored in the outer flow container are used, and need not injection pressure in liquid (only depending on electric field force to drive liquid) from outer spray jar ejaculation, then need not to be provided with, otherwise, pipe joint 19 will be set, so that connect with the constant pressure liquid stream of liquid-supplying system output, each free liquid-supplying system of liquid provides in interior flow container 1 and the outer flow container 2.
Liquid-supplying system can be a hydraulic pressure liquid-supplying system 29, also can be air pressure liquid-supplying system 28.Hydraulic pressure liquid-supplying system 29 is made of transfusion jar 17, fluid reservoir 13, infusion pump 15 and return duct 14.Wherein, infusion pump 15 is squeezed into transfusion jars 17 endlessly with the liquid in the fluid reservoir 13, and 14 of return ducts will infuses, and liquid more than needed draws back fluid reservoir 13 in jars 17, thereby makes the fluid pressure of exporting from transfusion jar 17 constant.This hydraulic pressure liquid-supplying system mainly be by gravity, just transfusion jar 17 residing positions supply with constant pressure liquid to interior flow container 1 or outer flow container 2, the length of woven hose 16 can be determined as required.
Air pressure liquid-supplying system 28 is made of transfusion jar 17, pulsometer 25, pressure regulator valve 26 and Pressure gauge 27.Wherein, pulsometer 25 will be squeezed into transfusion jars 17 through the constant pressure of pressure regulator valve 26 and Pressure gauge 27 controls, make that the fluid pressure of output is constant from transfusion jars 17.This air pressure liquid-supplying system is not limited by gravity, the liquid of flow container 1 or outer flow container 2 elevated pressures stream in generally can offering.
Two kinds of liquid-supplying systems all are provided with in order to make successive, even constant the carrying out of spinning energy.
The ultra-fine coaxial composite fibre that apparatus of the present invention are prepared is because its diameter is tiny, ratio Surface area height, functionalization are easy, are very suitable for medicine, fine filtering, biochemical protection etc. The application of aspect. As with the medicinal polymer of being used as core material, absorbable and degradable of antibiotic Make skin-material, be prepared into nonwoven, paste at burn and wait the extensive wound position, can Remove from and change dressings, take off the great pain that gauze brings for this class patient; Include with this for another example The fibre bundle of antibiotic medicine can be realized the controlled release of medicine as operation suture thread, from And mechanical stitch and biochemical treatment are combined together, patient's wound healing is brought best effective Really; And for example antiviral material is used as core material,, odorlessness nontoxic, harmless to human body General polymer as skin-material, be prepared into nonwoven, make mouth mask, protective garment etc., Not only can isolate harmful virus to the infringement of human body, but also can be because of the defective of isolated material itself Human body is brought any discomfort. Other application comprises the inorganic pottery take polymer as carrier Porcelain or metal are got and are made skin-material, process through high temperature cabonization again, prepare big L/D ratio The ultra-fine pipe of pottery or metal. The present invention has that preparation technology is simple, equipment cost is cheap, the city Wide advantage is used in the field, has very big economic benefit and social benefit.

Claims (10)

1. a multi-nozzle electrospinning device for preparing coaxial compound continuous nano/micron fiber is made up of interior flow container, outer flow container, flow container end socket, bull combination spray pipe, liquid-supplying system, mozzle, contact rod, electrostatic generator, it is characterized in that:
Each shower nozzle all contains inside and outside two hollow jet pipes, and wherein inner nozzle is coaxial with outer nozzle, and on the low head of flow container, outer nozzle all placed on the low head of outer flow container in inner nozzle all placed, and the liquid in the inside and outside flow container is connected in the jet pipe of flow container separately.
2. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 1 is characterized in that:
The low head base profile of interior flow container is a rectangle, outer flow container low head then has a rectangle guide groove, form minim gap between the low head of rectangle guide groove and interior flow container, make inner nozzle can effectively insert in each self-corresponding outer nozzle and make inside and outside jet pipe coaxial positioning.
3. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 2 is characterized in that:
Respectively on the rectangle low head of interior flow container or outside offer several pod apertures or groove on the rectangle guide groove limit of flow container low head, make outer liquid can from these pod apertures or groove, flow to the outer nozzle mouth.
4. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 2 is characterized in that:
Leave the gap step in the rectangle guide groove in the flow container low head outside, between the plane of the rectangle low head bottom surface of flow container and guide groove a minimum clearance distance is arranged in making, so that the liquid in the outer flow container can flow to the outer nozzle mouth.
5. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 1 is characterized in that:
The flow container upper cover offers the centre bore coaxial with interior flow container outside, so that and form minim gap between the interior flow container outer wall, make the bull combination spray pipe play coaxial guide effect.
6. prepare the multi-nozzle electrospinning device of coaxial compound continuous nano/micron fiber according to claim 1 or 5, it is characterized in that:
Flow container upper cover end face is provided with the adjusting nut that cooperates with interior flow container outer wall thread outside, by regulating distance between the inside and outside nozzle exit, reaches the purpose of adjusting spinning parameter.
7. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 1 is characterized in that:
Be mounted with contact rod respectively or/and conductive coil in the inside and outside flow container liquid, connect with dc static generator I and dc static generator II separately, or parallel connection is switched to same electrostatic generator, and the DC voltage that electrostatic generator provides is between 2kV～100kV.
8. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 1 is characterized in that:
Each free liquid-supplying system of liquid in interior flow container and the outer flow container provides.
9. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 8 is characterized in that:
Described liquid-supplying system is the hydraulic pressure liquid-supplying system, constitute by transfusion jar, fluid reservoir, infusion pump and return duct, wherein, infusion pump is squeezed into the transfusion jar endlessly with the liquid in the fluid reservoir, liquid more than needed during return duct then will be infused jar draws back fluid reservoir, thereby makes the fluid pressure of exporting in the transfusion jar constant.
10. the multi-nozzle electrospinning device of the coaxial compound continuous nano/micron fiber of preparation according to claim 8 is characterized in that:
Described liquid-supplying system is the air pressure liquid-supplying system, and by transfusion jar, pulsometer, control valve, constitute with Pressure gauge, wherein, pulsometer will be squeezed into transfusion jar through control valve and the list-directed constant pressure of pressure, make that the fluid pressure of exporting from the transfusion jar is constant.
CNB2003101092229A 2003-12-10 2003-12-10 Electrostatic spinning apparatus with multi-spraying heads for preparing coaxial composite continuous nanometer/micron fibre Expired - Fee Related CN100410429C (en)

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CN101871130A (en) * 2010-07-06 2010-10-27 北京化工大学 Novel straight-strut electrostatic spinning spray nozzle
EP2340324A1 (en) * 2008-10-17 2011-07-06 Deakin University Electrostatic spinning assembly

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CN100513300C (en) * 2006-11-28 2009-07-15 厦门大学 Micro nano structure direct-writing device
CN101220524B (en) * 2007-01-11 2011-09-28 云南炎尚科技有限公司 Device for producing nano-fibre film with macromolecular solution electrostatic filature
CN100577897C (en) * 2007-01-15 2010-01-06 中国科学院化学研究所 Multi-fluid composite electrostatic spinning device
CN101845673B (en) * 2010-06-13 2012-07-04 东华大学 Electric fan blade type electrostatic spinning nozzle and using method thereof
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EP2340324A1 (en) * 2008-10-17 2011-07-06 Deakin University Electrostatic spinning assembly
KR20110111368A (en) * 2008-10-17 2011-10-11 디킨 유니버시티 Electrostatic spinning assembly
JP2012505972A (en) * 2008-10-17 2012-03-08 ディーキン ユニバーシティ Electrostatic spinning assembly
EP2340324A4 (en) * 2008-10-17 2012-12-12 Univ Deakin Electrostatic spinning assembly
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KR101719377B1 (en) * 2008-10-17 2017-03-23 디킨 유니버시티 Electrostatic spinning assembly
CN101871130A (en) * 2010-07-06 2010-10-27 北京化工大学 Novel straight-strut electrostatic spinning spray nozzle
CN101871130B (en) * 2010-07-06 2011-08-10 北京化工大学 Novel straight-strut electrostatic spinning spray nozzle

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