US20080265469A1 - Device and Method for Preparing Filament Yarn of Composite Nanofibers - Google Patents

Device and Method for Preparing Filament Yarn of Composite Nanofibers Download PDF

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Publication number
US20080265469A1
US20080265469A1 US12/084,839 US8483906A US2008265469A1 US 20080265469 A1 US20080265469 A1 US 20080265469A1 US 8483906 A US8483906 A US 8483906A US 2008265469 A1 US2008265469 A1 US 2008265469A1
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Prior art keywords
pairs
filament yarn
electrospinning nozzles
frame
composite nanofibers
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US12/084,839
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English (en)
Inventor
Xinsong Li
Chen Yao
Fuqian Sun
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Southeast University
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Southeast University
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Assigned to SOUTHEAST UNIVERSITY reassignment SOUTHEAST UNIVERSITY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LI, XINSONG, SUN, FUQIAN, YAO, CHEN
Assigned to SOUTHEAST UNIVERSITY reassignment SOUTHEAST UNIVERSITY CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS PREVIOUSLY RECORDED ON REEL 021039 FRAME 0241. ASSIGNOR(S) HEREBY CONFIRMS THE NANGIN SHOULD BE NANJING. Assignors: LI, XINSONG, SUN, FUQIAN, YAO, CHEN
Publication of US20080265469A1 publication Critical patent/US20080265469A1/en
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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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof

Definitions

  • the present invention relates to device and method for preparing filament yarn of composite nanofibers. It belongs to the technical field of manufacturing special fibers.
  • Electrospun nanofibers are often collected as randomly oriented structures in the form of nonwoven mats. It is difficult to manufacture continuous nanofiber yarns or filaments.
  • Electrospun fibers can be aligned more or less parallel to each other when a drum rotating at high speed is used as the collector. Another method is to deposit nanofibers into water to eliminate the charges of nanofibers which are collected together, and yarns are drawn out. Others obtain aligned fiber yarns by linking and twisting the electrospun nanofibers deposited on the steel drum.
  • the present invention is to provide device and method for preparing filament yarn of composite nanofibers which can manufacture filament yarn of composite nanofibers simply and efficiently.
  • Device for preparing filament yarn of composite nanofibers comprising: pairs of electrospinning nozzles, filament guiding roller pair, frame, fixed sticks and base. Two columns of oppositely disposed pairs of electrospinning nozzles are fixed on frame. Each pair of electrospinning nozzles is in either same or different planes.
  • the frame is connected to base by vertical fixed sticks.
  • Filament guiding roller pair is located in the plane of frame with same distance away from two spouts of each electrospinning nozzles pair.
  • the frame is set at an adjustable acute angle to the fixed sticks.
  • the roller pair is at the end of pairs of electrospinning nozzles. Distance between two neighbouring electrospinning nozzles on the same column of frame is 2-50 cm. Distance between two spouts of oppositely disposed pair of electrospinning nozzles is 10-100 cm. Plane of frame is set at angle of 0-90° to fixed sticks.
  • the coated filament yarn of composite nanofibers is then drawn down and/or stretched, forming two-layer filament yarn of composite nanofibers.
  • filament yarn of composite nanofibers fabricated by former pair of electrospinning nozzles are drawn down and used as a carrier to receive the nanofibers with opposite charge electrospun out from latter pair of nozzles.
  • the coated filament yarn of composite nanofibers is then drawn down and/or stretched by filament guiding roller pair 2 , forming multi-layer filament yarn of composite nanofibers.
  • Polymers are any of polyolefin, halogen-substituted polyolefin, silicone, polyether, polyamide, polyester, polycarbonate, polyurethane, epoxy resin, polyacrylonitrile, polyacrylic acid, polyacrylates, polyphenyl ether, polyanhydride, poly( ⁇ -amine acid), polyphenyl sulfide ether, or mixtures of above two or more polymers, or any of cellulose, cellulose derivatives, dextran, silk fibroin, chitosan, chitosan derivatives, hyaluronic acid, hyaluronic acid derivatives, collagen, carrageenan, sodium alginate, calcium alginate, chondroitin sulphate, gelatin, agar, dextran, fibril, fibrinogen, keratin, casein, albumin, elastin, or their derivatives or mixtures of above two or more polymers, or any of bioabsorbable synthetic polymers, such as poly-L-lactic acid, poly
  • Additives are any of antibiotics, immunosuppressants, antibacterial agents, hormone, vitamin, amino acids, peptides, proteins, enzymes, growth factor, antibacterial drugs, dope, hemostasis agents, anodyne, anti-hyperpiesia agents and anti-tumour agents, or mixtures of above two or more agents.
  • the present invention utilizes a method for preparing filament yarn of composite nanofibers, where electrospinning nozzles oppositely disposed are electrically charged by high DC voltages with opposite polarities. Nanofibers electrospun from the two nozzles which carry charges with opposite polarities attract each other, strike together, and neutralize their charges.
  • the present method shows a less dispersion and loss of nanofibers in the air. Furthermore, grounded metal collector used in conventional electrospinning method is unnecessary in the present invention.
  • frame is set at an adjustable acute angle to fixed sticks to avoid any slightly disturbed or unstable spinning jet.
  • the present invention can manufacture filament yarn of composite nanofibers simply and efficiently.
  • multi-layer filament yarn of composite nanofibers with polymer fiber carrier as core is produced having excellent mechanical properties.
  • the present invention can produce filament yarns of composite nanofibers including nano-particles as combined with electro-spraying technique.
  • the present invention can manufacture filament yarn of composite nanofibers having potential applications in tissue engineered scaffolds and textiles, etc.
  • FIG. 1 is structure scheme of the present invention.
  • the two figures include pairs of electrospinning nozzles 1 , filament guiding roller pair 2 , frame 3 , fixed sticks 4 and base 5 .
  • FIG. 3 is photograph of PLLA filament yarns of composite nanofibers.
  • FIG. 5 is SEM image of PLLA filament yarns of composite nanofibers.
  • FIG. 7 is SEM image of PAN filament yarn of composite nanofibers.
  • FIG. 8 is SEM image of PVDF filament yarn of composite nanofibers.
  • Device for preparing filament yarn of composite nanofibers comprising: pairs of electrospinning nozzles 1 , filament guiding roller pair 2 , frame 3 , fixed sticks 4 and base 5 .
  • Two columns of oppositely disposed pairs of electrospinning nozzles 1 are fixed on frame 3 .
  • Each pair of electrospinning nozzles is in either same or different planes.
  • the frame 3 is connected to base 5 by vertical fixed sticks 4 .
  • Filament guiding roller pair 2 is located in the plane of frame 3 with same distance away from two spouts of each electrospinning nozzles pair.
  • the roller pair 2 is at the end of pairs of electrospinning nozzles 1 .
  • the frame 3 is set at an adjustable acute angle to the fixed sticks 4 .
  • the coated filament yarn of composite nanofibers is then drawn down and/or stretched, forming two-layer filament yarn of composite nanofibers.
  • filament yarn of composite nanofibers fabricated by former pair of electrospinning nozzles are drawn down and used as a carrier to receive the nanofibers with opposite charge electrospun out from latter pair of nozzles.
  • the coated filament yarn of composite nanofibers is then drawn down and/or stretched by filament guiding roller pair 2 , forming multi-layer filament yarn of composite nanofibers.
  • Distance between two neighbouring electrospinning nozzles 1 on the same column of frame 3 is 2-50 cm. Distance between two spouts of oppositely disposed pair of electrospinning nozzles 1 is 10-100 cm. Plane of frame 3 is set at angle of 0-90° to fixed sticks 4 . High electrical voltages with opposite polarities applied to two oppositely disposed pairs of electrospinning nozzles 1 are fixed at 5-200 kV, respectively.
  • Inorganic particles are nano-antibacterial agents, catalysts, or carbon nanotubes.
  • Additives are any of antibiotics, immunosuppressants, antibacterial agents, hormone, vitamin, amino acids, peptides, proteins, enzymes, growth factor, antibacterial drugs, dope, hemostasis agents, anodyne, anti-hyperpiesia agents and anti-tumour agents, or mixtures of above two or more agents.
  • the present invention can manufacture filament yarn of composite nanofibers having potential applications in regeneration medicine and textiles, etc.
  • a device for electrospinning comprising frame 3 having four pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 90° to fixed sticks 4 .
  • 10 g polycaprolactone (PCL, Mw 90,000 g/mol) was dissolved in 100 ml N, N-dimethyl formamide, and the prepared solution was fed to the other column of electrospinning nozzles containing 4 spinnerets.
  • a device for electrospinning comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 90° to fixed sticks 4 .
  • a device for electrospinning comprising frame 3 having four pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 90° to fixed sticks 4 .
  • Plane of frame 3 is set at angle of 90° to fixed sticks 4 .
  • High DC voltages of ⁇ 20 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 0.5 mm, respectively.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 .
  • the drawing speed of filament guiding roller pair 2 was 8 cm/s.
  • multi-layer filament yarn of PAN/PPES composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • polyurethane (PU) was dissolved in 100 ml N, N-dimethyl formamide.
  • a device for electrospinning comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • 0.5 g chitosan was dissolved in 100 ml 0.1 mol/L acetic acid solution.
  • Distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm, and distance between two tips of oppositely disposed pair of electrospinning nozzles is 30 cm.
  • Plane of frame 3 is set at angle of 0° to fixed sticks 4 .
  • High DC voltages of ⁇ 20 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 0.8 mm, respectively.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 .
  • the drawing speed of filament guiding roller pair 2 was 5 cm/s.
  • filament yarn of HA/PLLA composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • PLLA poly-L-lactic acid
  • a device for electrospinning comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • High DC voltages of ⁇ 20 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 0.8 mm, respectively.
  • Drawing speed of filament guiding roller pair is 5 cm/s.
  • Nanofibers from the oppositely disposed electrospinning nozzles which carry charges with opposite polarities deposited on polyester fibers and then drawn out by filament guiding roller pair 2 set under frame.
  • Multi-layer filament yarns of composite nanofibers whose core is polyester fibers with shell of composite PAN/PU nanofibers were drawn out and collected by the filament guiding roller pair.
  • a device for electrospinning comprising frame 3 having four pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 45° to fixed sticks 4 .
  • 10 g polyurethane (PU) was dissolved in 100 ml N, N-dimethyl formamide, and the prepared solution was fed to one column of electrospinning nozzles containing 4 spinnerets.
  • 10 g polycaprolactone was dissolved in 100 ml N, N-dimethyl formamide, and the prepared solution was fed to the other column of electrospinning nozzles containing 4 spinnerets.
  • Distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm, and distance between two tips of oppositely disposed pair of electrospinning nozzles is 30 cm.
  • Plane of frame 3 is set at angle of 45° to fixed sticks 4 .
  • High DC voltages of +15 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 1.2 mm, respectively.
  • Drawing speed of filament guiding roller pair 2 is 5 cm/s.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by the filament guiding roller pair, collecting as continuous multi-layer filament yarn of PU/PCL composite nanofibers.
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • the drawing speed of filament guiding roller pair 2 was 5 cm/s. Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 . And, filament yarn of PLLA composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • a device for electrospinning comprising frame 3 having ten pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 30° to fixed sticks 4 .
  • Distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm, and distance between two tips of oppositely disposed pair of electrospinning nozzles is 30 cm.
  • Planes of frame and fixed sticks were set at an angle of 30°.
  • High DC voltages of ⁇ 50 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 0.8 mm, respectively.
  • Drawing speed of filament guiding roller pair 2 is 5 cm/s.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by the filament guiding roller pair, collecting as continuous filament yarn of PLLA/HA composite nanofibers with diameter of ca. 150 micros.
  • a device for electrospinning comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 30° to fixed sticks 4 .
  • chitosan 0.5 g chitosan was dissolved in 100 ml 0.1 mol/L acetic acid solution, and the prepared solution was fed to one column of electrospinning nozzles containing 3 spinnerets.
  • 10 g polycaprolactone (PCL) was dissolved in 100 ml N, N-dimethyl formamide, and the prepared solution was fed to the other column of electrospinning nozzles containing 3 spinnerets.
  • Distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm, and distance between two tips of oppositely disposed pair of electrospinning nozzles is 20 cm. Planes of frame and fixed sticks were set at an angle of 30°.
  • High DC voltages of +20 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 0.6 mm, respectively.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 .
  • the drawing speed of filament guiding roller pair 2 was 5 cm/s.
  • filament yarn of chitosan/PCL composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having four pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 90° to fixed sticks 4 .
  • Plane of frame 3 is set at angle of 90° to fixed sticks 4 .
  • High DC voltages of +20 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 0.5 mm, respectively.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 .
  • the drawing speed of filament guiding roller pair 2 was 8 cm/s.
  • multi-layer filament yarn of PC/PPES composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having four pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 30° to fixed sticks 4 .
  • a device for electrospinning comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • PLLA poly-L-lactic acid
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • Plane of frame 3 is set at angle of 0° to fixed sticks 4 .
  • High DC voltages of ⁇ 50 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 1.2 mm, respectively.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 .
  • the drawing speed of filament guiding roller pair 2 was 5 cm/s.
  • filament yarn of PLLA/ ⁇ -TCP composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having twenty-five pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • Plane of frame 3 is set parallel to fixed sticks 4 .
  • High DC voltages of ⁇ 120 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 1.2 mm, respectively.
  • Drawing speed of the filament guiding roller pair 2 is 10 cm/s.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by the filament guiding roller pair, collecting as continuous filament yarn of PLLA/HA composite nanofibers with diameter of ca. 200 micros.
  • a device for electrospinning comprising frame 3 having ten pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • PLLA poly-L-lactic acid
  • M poly-L-lactic acid
  • Plane of frame 3 is set parallel to fixed sticks 4 .
  • High DC voltages of +80 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 1.2 mm, respectively.
  • Drawing speed of filament guiding roller pair 2 is 5 cm/s. Nanofibers exiting from the electrospinning nozzles were induced and drawn out by the filament guiding roller pair, collecting as continuous PLLA composite nanofiber yarns with diameter of ca. 100 micros.
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • 1.5 g collagen was dissolved in 30 ml hexafluoro-2-propanol (HFIP), and the prepared solution was fed to the other column of electrospinning nozzles containing 2 spinnerets.
  • Distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm, and distance between two tips of oppositely disposed pair of electrospinning nozzles is 30 cm.
  • Plane of frame 3 is set parallel to fixed sticks 4 .
  • High DC voltages of ⁇ 30 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 1.2 mm, respectively.
  • the drawing speed of filament guiding roller pair 2 was 3 cm/s.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 . And, filament yarn of PLLA/collagen composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 30° to fixed sticks 4 .
  • PVDF poly (vinylidenefluoride)
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 . And, filament yarn of PVDF composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • PVDF poly (vinylidenefluoride)
  • High DC voltages of ⁇ 20 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 1.2 mm, respectively.
  • the drawing speed of filament guiding roller pair 2 was 3 cm/s.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 .
  • filament yarn of PVDF/PU composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having two pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • 10 g poly (vinyl pyrrolidone) (PVP K30, BASF) was dissolved in 50 ml acetone, and the prepared solution was fed to the other column of electrospinning nozzles containing 2 spinnerets.
  • Distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm, and distance between two tips of oppositely disposed pair of electrospinning nozzles is 30 cm.
  • Plane of frame 3 is set parallel to fixed sticks 4 .
  • High DC voltages of ⁇ 20 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 1.2 mm, respectively.
  • the drawing speed of filament guiding roller pair 2 was 3 cm/s.
  • Nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 .
  • filament yarn of PLLA/PVP composite nanofibers is obtained.
  • a device for electrospinning comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns, filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles.
  • the frame 3 was set at angle of 0° to fixed sticks 4 .
  • chitosan was dissolved in 100 ml 0.1 mol/L acetic acid solution.
  • 1.5 g collagen was dissolved in hexafluoro-2-propanol (HFIP).
  • solutions were fed to two columns of oppositely disposed 6 electrospinning nozzles, respectively.
  • Distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm, and distance between two tips of oppositely disposed pair of electrospinning nozzles is 30 cm.
  • Plane of frame 3 is set parallel to fixed sticks 4 .
  • High DC voltages of +15 kV were applied to two columns of oppositely disposed electrospinning nozzles with inner diameter of 0.8 mm, respectively.
  • Filament yarn of composite nanofibers fabricated by former pair of electrospinning nozzles are drawn out and subsequently wrapped around composite nanofibers from latter pair of two oppositely charged electrospinning nozzles.
  • the nanofibers are then drawn out and/or stretched by filament guiding roller pair, forming filament yarn of composite nanofibers.
US12/084,839 2005-11-11 2006-11-10 Device and Method for Preparing Filament Yarn of Composite Nanofibers Abandoned US20080265469A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200510095384.0 2005-11-11
CNB2005100953840A CN100427652C (zh) 2005-11-11 2005-11-11 复合纳米纤维长丝束制备装置及其制备方法
PCT/CN2006/003014 WO2007054029A1 (fr) 2005-11-11 2006-11-10 Dispositif et procede de preparation de cables de filaments formes de nanofibres composites

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ITRM20110339A1 (it) * 2011-06-28 2012-12-29 Appolonia S P A D "sistema di elettrofilatura di tessuto composito"
WO2013059341A1 (en) 2011-10-18 2013-04-25 St. Teresa Medical, Inc. Method of forming dextran and thrombin sheets
WO2013059346A1 (en) 2011-10-18 2013-04-25 St. Teresa Medical, Inc. Method of forming hemostatic products
EP2607382A1 (de) * 2011-12-22 2013-06-26 Philipps Universität Marburg Chemisch funktionalisierte elektrogesponnene Dispersionsfasern für Layer-by-Layer-Beschichtungen
FR2987373A1 (fr) * 2012-02-27 2013-08-30 Univ Claude Bernard Lyon Procede de fabrication de fils continus composes d'un assemblage de filaments et fils obtenus
CZ304137B6 (cs) * 2012-12-17 2013-11-13 Technická univerzita v Liberci Zpusob výroby polymerních nanovláken zvláknováním roztoku nebo taveniny polymeru v elektrickém poli a lineární útvar z polymerních nanovláken vytvorený tímto zpusobem
EP2862967A1 (en) 2013-09-13 2015-04-22 Technicka Univerzita V Liberci Linear core-shell type textile formation containing a shell of polymer nanofibres and filtering agent for filtering gaseous media
US9383292B1 (en) * 2011-09-13 2016-07-05 Clemson University Flexible fiber-based micro and nanofluidics for probing liquids
US9399082B2 (en) 2008-04-11 2016-07-26 The Henry M. Jackson Foundation For The Advancement Of Military Medicine, Inc. Electrospun dextran fibers and devices formed therefrom
US9555157B2 (en) 2013-11-12 2017-01-31 St. Teresa Medical, Inc. Method of inducing hemostasis in a wound
US9604168B2 (en) 2013-02-14 2017-03-28 Nanopareil, Llc Hybrid felts of electrospun nanofibers
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