CN102703998B - Jet yarn spinning device for electrostatic spun nano fiber and preparing method - Google Patents
Jet yarn spinning device for electrostatic spun nano fiber and preparing method Download PDFInfo
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- CN102703998B CN102703998B CN201210207250.3A CN201210207250A CN102703998B CN 102703998 B CN102703998 B CN 102703998B CN 201210207250 A CN201210207250 A CN 201210207250A CN 102703998 B CN102703998 B CN 102703998B
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Abstract
The invention discloses a jet yarn spinning device for an electrostatic spun nano fiber, which includes a collecting device, wherein two thread jetting devices are arranged on the two sides of the collecting device and connected with a high-voltage electrostatic generator; a buncher is arranged below the collecting device; the two thread jetting devices are arranged between the collecting device and the buncher and symmetrically and oppositely arranged along the axis; a jet nozzle twister is arranged below the buncher; a delivery roller is arranged below the jet nozzle twister; a winding mechanism is arranged below the delivery roller; and the collecting device, the buncher, the jet nozzle twister and the delivery roller are arranged along the same axis from top to bottom. The electrostatic spun nano fiber spinning device integrates thread jetting, collecting, drawing, twisting and winding, and can continuously prepare the electrostatic spun nano fiber yarns. The nano fiber spinning method has simple process, high yarn yield, is suitable for multiple polymer yarn solutions, and realizes the continuous and scaled preparation of the nano fiber yarns.
Description
Technical field
The invention belongs to field of textile machinery, relate to a kind of resultant yarn apparatus and method of electrostatic spinning nano fiber, be specifically related to a kind of Air-Jet Spinning resultant yarn apparatus and method of can serialization preparing electro-spun nanofiber yarn.
Background technology
Electrostatic spinning technique is to prepare the effective method of nanofiber, the principle of electrostatic spinning is, under the effect of electrostatic field, the polymer drop that is positioned at spinning head becomes taylor cone, when electrostatic field force surpasses the threshold value of surface tension of liquid, will form good charged jet, and accelerated, drawing-off, refinement, the difference of metal collection unit after solvent evaporates, forms nanofiber, because can obtain the nanofiber mats of different shape.Although electro spinning nano fiber felt can directly apply to many aspects such as filtering material, tissue engineering bracket, useful for drug delivery material, biomimetic material, composite reinforcing material, but for textile industry, continuous fine nano-fibre yams is just with a wide range of applications, because only just can obtain woven fabric, knitted fabric, braided fabric and other more various nanofiber product and application based on yarn.
The report of at present more existing electrostatic spinning nano fiber resultant yarns, as Chinese patent 200510038571.5 discloses a kind of preparation method of nano fiber endless tow, utilize metal needle staggered relatively to connect respectively both positive and negative polarity, the fiber gushing out from two syringe needles attracts each other, collides, forms composite nano fiber aloft, drawn is wound on the cylinder of rotation and forms nanofiber tow, in the method in endless tow fiber continuously, arrange well but not twisting effect is not the yarn of stricti jurise.Chinese patent 200810018267.8 discloses the preparation method of a kind of electro-spun nanofiber yarn system and nano-fibre yams, utilize the disk deposition electro spinning nano fiber of fluting, by lead-in wire and godet roller, draw rear twisting and obtain nano-fibre yams, in this patent, fiber can not be collected in groove completely, cause fiber waste, disk often rotates a circle the position cutting that need pull out in bundles of nanofibers with cutting knife once in addition, and technique is comparatively complicated, and deficient in stability, continuity.Zhang [Kai Zhang, Journal of Polymer Science:Part B:Polymer Physics, 2010,48,1118] etc. the metal needle point by ground connection guides the collection of filaments as auxiliary electrode, realize the continuous collection of non-twist PLLA, PAN, PMIA nanofiber aggregate, but in this gathering-device, the electrical conductivity of polymer solution there is material impact to fiber aggregate, only adapt to the electrical conductivity resultant yarn of polymer within the specific limits.Smit [Eugene Smit, Polymer, 2005,46,2419] etc. proposes the electrostatic spinning that water-bath is receiving system the earliest, by the water surface, collects nanofiber, by the surface tension of fiber in bath and coagulating bath, fiber assembly is stretched and forms fibre bundle.Teo [Wee-Eong Teo, Polymer, 2007,48,3400] etc. water-bath receiving system is improved, utilize Dynamic Water as coagulating bath, and twist by the boundling that eddy current effect has realized fiber, the efficiency that nanofiber is collected in water-bath is higher, but is only applicable to non-water-soluble polymer resultant yarn.Said method is all to utilize traditional single needle as spinning head, and output only has 0.1-1g/h, acquisition nano-fibre yams that can not steady and continuous, and the problem that exists fiber better not align in yarn.
Summary of the invention
The Air-Jet Spinning that the object of this invention is to provide a kind of electrostatic spinning nano fiber becomes yarn feeding device, can serialization prepares fiber alignment and arranges good nano-fibre yams, provides and utilizes above-mentioned Air-Jet Spinning to become yarn feeding device to prepare the method for nano-fibre yams.
Technical scheme of the present invention is: a kind of Air-Jet Spinning of electrostatic spinning nano fiber becomes yarn feeding device, it comprises apparatus for collecting, apparatus for collecting both sides are provided with two spinning appts, two spinning appts are connected with HV generator, apparatus for collecting below is provided with buncher, two spinning appts are between apparatus for collecting and buncher, along the symmetrical configuration relatively of axis, buncher below is provided with nozzle twister, nozzle twister below is provided with delivery roller, delivery roller below is provided with winding mechanism, described apparatus for collecting, buncher, nozzle twister and delivery roller are from top to bottom arranged along same axis.
Described spinning appts is to be provided with the air chamber of air inlet and solution chamber that a side is provided with inlet is formed by connecting by intermediate connector by a side, is provided with air jet pipe vertically upward on intermediate connector, is provided with spinning head vertically upward in solution chamber.
Described air chamber and solution chamber are cylindrical; Minimum one of described spinning head and air jet pipe, they are concentric circles arranges, and the air jet pipe of the corresponding concentric of each spinning head is ventilated to it, the height of air jet pipe is lower than the upper end of spinning head, higher than the upper surface of solution chamber, the internal diameter of spinning head is 1-40mm, and spacing is 0.1-15cm.
Described apparatus for collecting is with the rosette of rotating shaft or loudspeaker, and by transmission mechanism control, it pivots, and rosette or bell-mouthed diameter are 1-2 times of solution chamber's upper surface diameter in spinning appts; Described buncher import is to outlet tubaeform that diameter progressively narrows, and the diameter in exit is 0.8-8mm.
Described nozzle twister is comprised of air inlet pipe, air chamber, spray-hole, yarn road, intervalve and outlet, the inner periphery in described spray-hole Yu Sha road is tangent, the aperture of spray-hole is 0.1-0.55mm, and the angle in Yu Sha road is 30-50 °, and spraying hole count is 2-8; The diameter of described Sha road above spray-hole entrance is 0.8-2.0mm, length 8-15mm, and the diameter below spray-hole entrance is 2.0-3.5mm, length 8-15mm; The diameter of described intervalve is 3.0-6.0mm, length 8-15mm; The diameter of described outlet is 5.0-10.0mm, length 5-12mm.
The angle of described spinning appts and axis is 15-40 °; The outlet of buncher is connected with the entrance in nozzle twister Zhong Sha road; Distance between the spinning head upper end, center of two spinning appts is 5-50cm, and the distance between the center of apparatus for collecting is 6-60cm; The entrance in nozzle twister yarn road and the distance between apparatus for collecting are 15-100cm.
The voltage of described HV generator is 10-200kV, and positive pole is connected with the spinning head of metal material in two spinning appts respectively with negative pole.
The spinning head of described spinning appts is metal material, and all the other are insulating materials, and the outside of spinning head is also overlapped and had insulating materials.
Described Air-Jet Spinning becomes yarn feeding device to prepare the method for nano-fibre yams, and its step is as follows:
A, utilize peristaltic pump or other at the uniform velocity liquid feed device by polymer spinning solution by inlet average rate input solution chamber, the liquid level of spinning solution is lower than the upper end of spinning head, higher than the upper end of air jet pipe;
B, at the uniform velocity air-breather is by air inlet continuous wave output gas to air chamber to utilize crossing current air pump or other, and gas is through upwards ejection of air jet pipe, and the solution that spinning solution forms hollow in the upper end of spinning head is protruding;
C, open the transmission mechanism of apparatus for collecting, apparatus for collecting pivots, and control rotating speed is 10-2000 rev/min;
D, open HV generator, be adjusted to certain voltage, the positive pole of HV generator is connected with the spinning head of metal material in two spinning appts respectively with negative pole, and apparatus for collecting is earth-free.Under high voltage electric field effect, the top that polarization charge is gathered in spinning head upper end solution projection forms taylor cone, under the effect of stream pressure and electrostatic force, the taylor cone of hollow breaks, the spinning head ejection of two spinning appts is with opposite charges jet, by static drawing-off, attraction and neutralization, nanometer fiber net is deposited on the edge of apparatus for collecting;
E, the nanometer fiber net in step (c) is drawn, is orientated and twists, the sticking plaster of an insulation is placed in the center of apparatus for collecting in advance, sticking plaster is along continuous straight runs extraction backward slowly, form the taper nanometer fiber net of hollow, top sticks on sticking plaster, and bottom is connected with the edge of apparatus for collecting, further the vertex of a cone of drawing-off nanometer fiber net, fiber orientation, be agglomerated into bundles of nanofibers, or further the rotation by apparatus for collecting adds the nanofiber bar that is twisted certain twist in advance;
F, the air inlet pipe of nozzle twister is connected with air compressor, compressed air is injected yarn road by spray-hole, forms the air-flow of High Rotation Speed in Sha road, Bing Sha road enter interruption-forming negative pressure.Bundles of nanofibers in step (d) (or nanofiber bar) is introduced to buncher, because the bundles of nanofibers that exists of negative pressure is inhaled in yarn road, under the effect of swirling eddy, twist resultant yarn Bing Yansha road, through intervalve, export from outlet;
In g, step (e), the nano-fibre yams of twisting is exported under the effect of delivery roller, through winding mechanism, is wound into cylinder.
The direction of rotation of described apparatus for collecting is identical with the direction of rotation of jet-stream wind in nozzle twister yarn road, applying of the nano-fibre yams twist can rely on the High Rotation Speed of jet-stream wind in yarn road to complete separately, also can be in nozzle twister yarn road the High Rotation Speed of jet-stream wind and the rotation of apparatus for collecting jointly complete.
The invention has the beneficial effects as follows: electrostatic spinning nano fiber of the present invention becomes yarn feeding device collection spray silk, gathers, drawing-off, twist and be wound in one, can continuous production electro-spun nanofiber yarn.In the system of spinning appts solution of the present invention in sealing, reduced like this volatilization of solvent in solution, can keep stable solution concentration, spinning head aperture is large, by the continuous ventilation of air jet pipe, flowing of gas can avoid the clogging of spinning head to occur, single spinning head can eject multiple jets, a plurality of spinning heads spray simultaneously, have greatly improved the output of electrostatic spinning nano fiber; The joint of the positive and negative jet of apparatus for collecting in two spinning appts ejections, can deposit and assemble the nanofiber after charging neutrality well, and the rotation of apparatus for collecting simultaneously also can be played twisting effect to bundles of nanofibers; Utilize the air-flow twisting of nozzle twister high speed rotation, do not need the twisting parts of other complexity, twister is simple in structure, and production efficiency is high; Can, by controlling air pressure and the flow in the feed liquor speed, draft speed, apparatus for collecting rotating speed, twister of solution, the fineness of nano-fibre yams, the twist and output be controlled.Nanofiber resultant yarn method technique of the present invention is simple, yarn output is high, is applicable to multiple polymers spinning solution, can realize serialization, the scale preparation of nano-fibre yams.
Accompanying drawing explanation
Fig. 1 is that electrostatic spinning nano fiber Air-Jet Spinning becomes yarn feeding device, the disk that wherein apparatus for collecting is metal material;
Fig. 2 is that electrostatic spinning nano fiber Air-Jet Spinning becomes yarn feeding device, the loudspeaker that wherein apparatus for collecting is metal material;
Fig. 3 is the structural representation that electrostatic spinning nano fiber Air-Jet Spinning becomes spinning appts in yarn feeding device;
Fig. 4 is the structural representation that electrostatic spinning nano fiber Air-Jet Spinning of the present invention becomes nozzle twister in yarn feeding device;
Fig. 5 is the electron micrograph of Static Spinning PAN nano-fibre yams, and multiplication factor is 500 times;
Fig. 6 is the electron micrograph of Static Spinning PAN nano-fibre yams, and multiplication factor is 5000 times;
Wherein: 1, spinning appts; 2, apparatus for collecting; 3, buncher; 4, nozzle twister; 5, delivery roller; 6, winding mechanism; 7, HV generator; 8, air chamber; 9, spinning head; 10, air jet pipe; 11, air inlet; 12, inlet; 13, intermediate connector; 14, solution chamber; 15, spray-hole; 16, yarn road; 17, intervalve; 18, outlet; 19, air chamber; 20, air inlet pipe.
The specific embodiment
Embodiment 1
Shown in Fig. 1, Fig. 3 and Fig. 4, a kind of Air-Jet Spinning of electrostatic spinning nano fiber becomes yarn feeding device, comprises spinning appts 1, apparatus for collecting 2, buncher 3, nozzle twister 4, delivery roller 5, winding mechanism 6 and HV generator 7.
Spinning appts 1 is to have the air chamber 8 of air inlet 11 and solution chamber 14 that a side has inlet 12 to be formed by connecting by intermediate connector 13 by a side, and air chamber 8 and solution chamber 14 are cylindrical.On intermediate connector 13, be provided with air jet pipe 10 vertically upward, in solution chamber 14, be provided with spinning head 9 vertically upward.The number of spinning head 9 and air jet pipe 10 is 5, is concentric circles and arranges, and 1, center, on limit 4, the air jet pipe 10 of each spinning head 9 corresponding concentric is to its ventilation, and the height of air jet pipe 10 is lower than the upper end of spinning head 9, higher than the upper surface of solution chamber 14.The internal diameter of spinning head 9 is 8.0 mm, and spacing is 5.0 cm.Spinning appts 1 except spinning head 9 be that metal material, all the other are insulating materials, and the outside of spinning head 9 is also overlapped and is had insulating materials.
Apparatus for collecting 2 is the rosette with rotating shaft, can by motor or other transmission mechanism control, it pivot, and the diameter of rosette is 2 times of solution chamber's 14 upper surface diameters in spinning appts 1.Buncher 3 imports are to outlet tubaeform that diameter progressively narrows, and the diameter in exit is 1.8 mm.
Nozzle twister 4 is comprised of air inlet pipe 20, air chamber 19, spray-hole 15, yarn road 16, intervalve 17 and outlet 18.The inner periphery in spray-hole 15Yu Sha road 16 is tangent, and the aperture of spray-hole 15 is 0.38 mm, and the angle in Yu Sha road 16 is 45 °, and spraying hole count is 6.The diameter of yarn road 16 above spray-hole 15 entrances is 1.3 mm, length 8.0 mm, and the diameter below spray-hole 15 entrances is 2.3 mm, length 10 mm.The diameter of intervalve 17 is 4.5 mm, length 10 mm.The diameter of outlet 18 is 8.0 mm, length 8.0 mm.
Apparatus for collecting 2, buncher 3, nozzle twister 4 and delivery roller 5 are from top to bottom arranged along same axis.Two spinning appts 1 are between apparatus for collecting 2 and buncher 3, and along the symmetrical configuration relatively of axis, the inclination angle of spinning appts 1 (with the angle of axis) is 30 °.The outlet of buncher 3 is connected with the entrance in nozzle twister 4 Zhong Sha roads 16.Distance between center spinning head 9 upper ends of two spinning appts 1 is 12 cm, and the distance apparatus for collecting 2(rosette center) is 10 cm, the entrance in nozzle twister 4 yarn roads 16 and apparatus for collecting 2(rosette center) between distance be 25 cm.
Electrostatic spinning nano fiber Air-Jet Spinning becomes yarn feeding device to prepare a method for polyacrylonitrile (PAN) nano-fibre yams, comprises the following steps:
A, by PAN(weight average molecular weight 50,000) be dissolved in DMF (DMF), be made into mass concentration and be 13.5% spinning solution.Utilize peristaltic pump by PAN solution by inlet 12 average rates input solution chamber, the liquid level of PAN solution is lower than the upper end of spinning head 9, higher than the upper end of air jet pipe 10;
B, utilization crossing current air pump are by air inlet 11 continuous wave output gases to air chamber 8, and gas is through upwards ejection of air jet pipe 10, and PAN solution is in the solution projection of the upper end of spinning head 9 formation hollow;
C, open HV generator 7, be adjusted to certain voltage, the positive pole of HV generator 7 is connected with the spinning head 9 of metal material in two spinning appts 1 respectively with negative pole, and apparatus for collecting 2(rosette) earth-free.Under high voltage electric field effect, polarization charge is gathered in the top formation taylor cone of spinning head 9 upper end solution projections, and under the effect of stream pressure and electrostatic force, the taylor cone of hollow breaks, and ejects multiple jets.In two spinning appts 1, the jet of spinning head 9 ejection is with opposite charges, due to electrostatic attraction effect, neutralization can occur and be deposited on apparatus for collecting 2(rosette with the form of nanometer fiber net) edge;
D, for the PAN nanometer fiber net in step (c) is drawn, is orientated and twists, the sticking plaster of an insulation is placed in apparatus for collecting 2(rosette in advance) center, when sticking plaster is when slowly along continuous straight runs is extracted out backward, can form the taper nanometer fiber net of hollow, top sticks on sticking plaster, bottom and apparatus for collecting 2(rosette) edge be connected, the further vertex of a cone of drawing-off nanometer fiber net, fiber can be orientated, be agglomerated into PAN bundles of nanofibers;
E, the air inlet pipe of nozzle twister 4 20 is connected with air compressor, compressed air is injected yarn road 16 by spray-hole 15, forms the air-flow of High Rotation Speed in Sha road 16, Bing Sha road 16 enter interruption-forming negative pressure.PAN bundles of nanofibers in step (d) is introduced to buncher 3, because the PAN bundles of nanofibers that exists of negative pressure is inhaled in yarn road 16, under the effect of swirling eddy, twist resultant yarn Bing Yansha road 16, through intervalve 17, from outlet 18 outputs;
In f, step (e), the PAN nano-fibre yams of twisting is exported under the effect of delivery roller 5, through winding mechanism 6, is wound into cylinder.
In this example, the transmission mechanism of apparatus for collecting 2 is not opened, and apparatus for collecting 2 does not pivot, and therefore, PAN nano-fibre yams is to rely on separately the high-speed rotary of jet-stream wind in yarn road 16 to transfer twisting.The electron micrograph of prepared Static Spinning PAN nano-fibre yams as shown in Figure 5.
Embodiment 2
Shown in Fig. 2, Fig. 3 and Fig. 4, a kind of Air-Jet Spinning of electrostatic spinning nano fiber becomes yarn feeding device, comprises spinning appts 1, apparatus for collecting 2, buncher 3, nozzle twister 4, delivery roller 5, winding mechanism 6 and HV generator 7.
Spinning appts 1 is to have the air chamber 8 of air inlet 11 and solution chamber 14 that a side has inlet 12 to be formed by connecting by intermediate connector 13 by a side, and air chamber 8 and solution chamber 14 are cylindrical.On intermediate connector 13, be provided with air jet pipe 10 vertically upward, in solution chamber 14, be provided with spinning head 9 vertically upward.The number of spinning head 9 and air jet pipe 10 is 9, is concentric circles and arranges, and 1, center, on limit 8, the air jet pipe 10 of each spinning head 9 corresponding concentric is to its ventilation, and the height of air jet pipe 10 is lower than the upper end of spinning head 9, higher than the upper surface of solution chamber 14.The internal diameter of spinning head 9 is 12 mm, and spacing is 4.0 cm.Spinning appts 1 except spinning head 9 be that metal material, all the other are insulating materials, and the outside of spinning head 9 is also overlapped and is had insulating materials.
Apparatus for collecting 2 is the metal loudspeaker with rotating shaft, can by motor or other transmission mechanism control, it pivot, and the bell-mouthed diameter of metal is 1.8 times of solution chamber's 14 upper surface diameters in spinning appts 1.Buncher 3 imports are to outlet tubaeform that diameter progressively narrows, and the diameter in exit is 2.0 mm.
Nozzle twister 4 is comprised of air inlet pipe 20, air chamber 19, spray-hole 15, yarn road 16, intervalve 17 and outlet 18.The inner periphery in spray-hole 15Yu Sha road 16 is tangent, and the aperture of spray-hole 15 is 0.40 mm, and the angle in Yu Sha road 16 is 48 °, and spraying hole count is 4.The diameter of yarn road 16 above spray-hole 15 entrances is 1.6 mm, length 10.0 mm, and the diameter below spray-hole 15 entrances is 3.0 mm, length 10 mm.The diameter of intervalve 17 is 5.5 mm, length 12 mm.The diameter of outlet 18 is 10.0 mm, length 7.0 mm.
Apparatus for collecting 2, buncher 3, nozzle twister 4 and delivery roller 5 are from top to bottom arranged along same axis.Two spinning appts 1 are between apparatus for collecting 2 and buncher 3, and along the symmetrical configuration relatively of axis, the inclination angle of spinning appts 1 (with the angle of axis) is 35 °.The outlet of buncher 3 is connected with the entrance in nozzle twister 4 Zhong Sha roads 16.Distance between center spinning head 9 upper ends of two spinning appts 1 is 15 cm, and the distance the center in apparatus for collecting 2(horn mouth cross section) is 12 cm, the center in the entrance in nozzle twister 4 yarn roads 16 and apparatus for collecting 2(horn mouth cross section) distance between is 32 cm.
Electrostatic spinning nano fiber Air-Jet Spinning becomes yarn feeding device to prepare a method for PLA (PLA) nano-fibre yams, comprises the following steps:
A, by PLA(weight average molecular weight 80,000) be dissolved in carrene, be made into mass concentration and be 8% spinning solution.Utilize peristaltic pump (accompanying drawing does not draw) by PLA solution by inlet 12 average rates input solution chamber, the liquid level of PLA solution is lower than the upper end of spinning head 9, higher than the upper end of air jet pipe 10;
B, utilization crossing current air pump are by air inlet 11 continuous wave output gases to air chamber 8, and gas is through upwards ejection of air jet pipe 10, and PLA solution is in the solution projection of the upper end of spinning head 9 formation hollow;
C, open the transmission mechanism of apparatus for collecting 2, make it pivot, controlling rotating speed is 600 revs/min;
D, open HV generator 7, be adjusted to certain voltage, the positive pole of HV generator 7 is connected with the spinning head 9 of metal material in two spinning appts 1 respectively with negative pole, and apparatus for collecting 2(metal loudspeaker) earth-free.Under high voltage electric field effect, polarization charge is gathered in the top formation taylor cone of spinning head 9 upper end solution projections, and under the effect of stream pressure and electrostatic force, the taylor cone of hollow breaks, and ejects multiple jets.In two spinning appts 1, the jet of spinning head 9 ejection is with opposite charges, due to electrostatic attraction effect, neutralization can occur and be deposited on apparatus for collecting 2(metal loudspeaker with the form of PLA nanometer fiber net) edge;
E, for the PLA nanometer fiber net in step (c) is drawn, orientation and twisting, the sticking plaster of an insulation is placed in apparatus for collecting 2(metal loudspeaker in advance) center, when sticking plaster is when slowly along continuous straight runs is extracted out backward, can form the taper nanometer fiber net of hollow, top sticks on sticking plaster, bottom and apparatus for collecting 2(metal loudspeaker) edge be connected, the vertex of a cone of further drawing-off nanometer fiber net, fiber can be orientated, be agglomerated into bundles of nanofibers, and by apparatus for collecting 2(metal loudspeaker) rotation add in advance the PLA nanofiber bar that is twisted certain twist,
F, the air inlet pipe of nozzle twister 4 20 is connected with air compressor, compressed air is injected yarn road 16 by spray-hole 15, forms the air-flow of High Rotation Speed in Sha road 16, Bing Sha road 16 enter interruption-forming negative pressure.The PLA nanofiber bar of the pre-twisting in step (d) is introduced to buncher 3, because the PLA nanofiber bar that exists of negative pressure is inhaled in yarn road 16, under the effect of swirling eddy, twist resultant yarn Bing Yansha road 16, through intervalve 17, from outlet 18 outputs;
In g, step (e), the PLA nano-fibre yams of twisting is exported under the effect of delivery roller 5, through winding mechanism 6, is wound into cylinder.
In this example, apparatus for collecting 2(metal loudspeaker) rotation just can be played pre-twisting effect to PLA bundles of nanofibers, therefore, the twisting of PLA nano-fibre yams is jointly to complete by the High Rotation Speed of jet-stream wind in nozzle twister 4 yarn roads 16 and the rotation of apparatus for collecting 2.
Claims (4)
1. the Air-Jet Spinning of an electrostatic spinning nano fiber becomes yarn feeding device, it is characterized in that: it comprises apparatus for collecting (2), apparatus for collecting (2) both sides are provided with two spinning appts (1), two spinning appts (1) are connected with HV generator (7), apparatus for collecting (2) below is provided with buncher (3), two spinning appts (1) are positioned between apparatus for collecting (2) and buncher (3), along the symmetrical configuration relatively of axis, buncher (3) below is provided with nozzle twister (4), nozzle twister (4) below is provided with delivery roller (5), delivery roller (5) below is provided with winding mechanism (6), described apparatus for collecting (2), buncher (3), nozzle twister (4) and delivery roller (5) are from top to bottom arranged along same axis,
Described spinning appts (1) is to be provided with the air chamber (8) of air inlet (11) and solution chamber (14) that a side is provided with inlet (12) is formed by connecting by intermediate connector (13) by a side, on intermediate connector (13), be provided with air jet pipe (10) vertically upward, in solution chamber (14), be provided with spinning head (9) vertically upward;
Described air chamber (8) and solution chamber (14) are cylindrical; Minimum one of described spinning head (9) and air jet pipe (10), they are concentric circles and arrange, the air jet pipe (10) of the corresponding concentric of each spinning head (9) is to its ventilation, the height of air jet pipe (10) is lower than the upper end of spinning head (9), upper surface higher than solution chamber (14), the internal diameter of spinning head (9) is 1-40mm, and spacing is 0.1-15cm;
Described apparatus for collecting (2) is rosette or the loudspeaker with rotating shaft, and by transmission mechanism control, it pivots, and rosette or bell-mouthed diameter are 1-2 times of solution chamber (14) upper surface diameter in spinning appts (1); When apparatus for collecting is loudspeaker, described buncher (3) import is to outlet tubaeform that diameter progressively narrows, and the diameter in exit is 0.8-8mm;
Described nozzle twister (4) is comprised of air inlet pipe (20), air chamber (19), spray-hole (15), yarn road (16), intervalve (17) and outlet (18), the inner periphery in described spray-hole (15) Yu Sha road (16) is tangent, the aperture of spray-hole (15) is 0.1-0.55mm, the angle in Yu Sha road (16) is 30-50 °, and spraying hole count is 2-8; Described Sha road (16) is 0.8-2.0mm at the diameter of spray-hole (15) entrance top, length 8-15mm, and the diameter in spray-hole (15) entrance below is 2.0-3.5mm, length 8-15mm; The diameter of described intervalve (17) is 3.0-6.0mm, length 8-15mm; The diameter of described outlet (18) is 5.0-10.0mm, length 5-12mm.
2. the Air-Jet Spinning of electrostatic spinning nano fiber according to claim 1 becomes yarn feeding device, it is characterized in that: described spinning appts (1) is 15-40 ° with the angle of axis; The outlet of buncher (3) is connected with the entrance in nozzle twister (4) Zhong Sha road (16); Distance between center spinning head (9) upper end of two spinning appts (1) is 5-50cm, and the distance between the center of apparatus for collecting (2) is 6-60cm; Distance between the entrance in nozzle twister (4) yarn road (16) and apparatus for collecting (2) is 15-100cm.
3. the Air-Jet Spinning of electrostatic spinning nano fiber according to claim 2 becomes yarn feeding device, it is characterized in that: the voltage of described HV generator (7) is 10-200kV, positive pole is connected with the spinning head (9) of metal material in two spinning appts (1) respectively with negative pole.
4. according to the Air-Jet Spinning described in claim 1 ~ 3 any one, become yarn feeding device to prepare the method for nano-fibre yams, it is characterized in that, its step is as follows:
A, at the uniform velocity liquid feed device is by polymer spinning solution by inlet (12) average rate ground input solution chamber to utilize peristaltic pump or other, and the liquid level of spinning solution is lower than the upper end of spinning head (9), higher than the upper end of air jet pipe (10);
B, at the uniform velocity air-breather is by air inlet (11) continuous wave output gas to air chamber (8) to utilize crossing current air pump or other, and gas is through upwards ejection of air jet pipe (10), and the solution that spinning solution forms hollow in the upper end of spinning head (9) is protruding;
C, open the transmission mechanism of apparatus for collecting (2), apparatus for collecting (2) pivots, and control rotating speed is 10-2000 rev/min;
D, open HV generator (7), be adjusted to certain voltage, the positive pole of HV generator (7) is connected with the spinning head (9) of metal material in two spinning appts (1) respectively with negative pole, apparatus for collecting (2) is earth-free, under high voltage electric field effect, the top that polarization charge is gathered in spinning head (9) upper end solution projection forms taylor cone, under the effect of stream pressure and electrostatic force, the taylor cone of hollow breaks, spinning head (9) ejection of two spinning appts (1) is with opposite charges jet, by static drawing-off, attract and neutralization, nanometer fiber net is deposited on the edge of apparatus for collecting (2),
E, the nanometer fiber net in step (d) is drawn, is orientated and twists, the sticking plaster of an insulation is placed in the center of apparatus for collecting (2) in advance, sticking plaster is along continuous straight runs extraction backward slowly, form the taper nanometer fiber net of hollow, top sticks on sticking plaster, bottom is connected with the edge of apparatus for collecting (2), and further the rotation by apparatus for collecting (2) adds the nanofiber bar that is twisted certain twist in advance;
F, the air inlet pipe of nozzle twister (4) (20) is connected with air compressor, compressed air is injected yarn road (16) by spray-hole (15), in Sha road (16), form the air-flow of High Rotation Speed, Bing Sha road (16) enter interruption-forming negative pressure, nanofiber bar in step (e) is introduced to buncher (3), because the bundles of nanofibers that exists of negative pressure is inhaled in yarn road (16), under the effect of swirling eddy, twist resultant yarn Bing Yansha road (16), through intervalve (17), from outlet (18) output, obtain nano-fibre yams;
In g, step (f), the nano-fibre yams of twisting is exported under the effect of delivery roller (5), through winding mechanism (6), is wound into cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210207250.3A CN102703998B (en) | 2012-06-21 | 2012-06-21 | Jet yarn spinning device for electrostatic spun nano fiber and preparing method |
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| CN201210207250.3A CN102703998B (en) | 2012-06-21 | 2012-06-21 | Jet yarn spinning device for electrostatic spun nano fiber and preparing method |
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| CN102703998A CN102703998A (en) | 2012-10-03 |
| CN102703998B true CN102703998B (en) | 2014-09-03 |
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