CN111441093A - Needleless air spinning device for preparing composite nano fibers and working method thereof - Google Patents
Needleless air spinning device for preparing composite nano fibers and working method thereof Download PDFInfo
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- 238000009987 spinning Methods 0.000 title claims abstract description 99
- 239000002121 nanofiber Substances 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000011248 coating agent Substances 0.000 claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 70
- 239000012792 core layer Substances 0.000 claims description 29
- 239000010410 layer Substances 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000011258 core-shell material Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002086 nanomaterial Substances 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010041 electrostatic spinning Methods 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229920001410 Microfiber Polymers 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
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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
- D01D5/28—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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- 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
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
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- Engineering & Computer Science (AREA)
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- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a needleless air spinning device for preparing composite nano fibers and a working method thereof, and belongs to the technical field of nano material manufacturing. The inner cavity of the inverted cone rotating body is communicated with a gas boosting system and a nuclear layer spinning solution supply system, and the gas boosting system is used for applying pressure to the nuclear layer spinning solution in the inner cavity of the inverted cone rotating body; the bottom of the inverted cone rotating body is provided with a liquid outlet, the top of the inverted cone rotating body is connected with the end cover through a rotary sealing structure, and the inverted cone rotating body is connected with a rotary power system; the shell spinning solution coating system is arranged right opposite to the outer conical surface of the inverted cone rotating body; the high-temperature high-speed airflow jet system and the receiving device are respectively and oppositely arranged on two sides of a liquid outlet at the bottom of the inverted cone rotating body. The structure design is reasonable, the process flow is short, the core-shell structure composite nano-fiber with different structures and performances can be obtained, the efficiency is high, the yield is high, and the application prospect is good.
Description
Technical Field
The invention belongs to the technical field of nano material manufacturing, and particularly relates to a needle-free air spinning device for preparing composite nano fibers and a working method thereof.
Background
The functional fiber with a special structure has a plurality of excellent and unique properties and has potential value in a plurality of application fields. With the rapid development of nano technology, the preparation technology of nano fiber has become one of the important pillars for promoting the scientific and technical progress of fiber. The core-shell structured nanofiber, in which a plurality of materials are combined in the axial direction, is formed by the multicomponent fibers of the inner and outer layers together, and is more excellent in functionality, mechanical properties, stability and the like than a single-spun nanofiber. For example, if the core layer material is removed, a hollow microfiber can be obtained. In addition, the polymer with good spinnability is used as a shell layer, and the polymer with poor spinnability is used as a core layer, so that the spinnability of the polymer difficult to spin is improved. Due to the particularity of the core-shell nanofiber structure, the core-shell nanofiber has extremely important application and value in the aspects of catalytic filtration, gas storage, drug slow release, tissue engineering scaffolds, wound dressings and the like, and is therefore highly valued and widely researched by the scientific community.
At present, the manufacturing processes of core-shell structure nano fibers which are widely researched and applied mainly comprise three processes of electrostatic spinning, melt-blown spinning and composite spinning. However, the three methods have certain problems respectively, the electrostatic spinning method has low yield, the needle head is easy to block, and high-voltage electrostatic danger exists; the diameter of the fiber obtained by the melt-blown spinning method is thicker, and higher spinning temperature is needed; the composite spinning method has complex equipment and long process flow, and also needs high temperature, chemical treatment and the like. These methods are difficult to satisfy the manufacturing characteristics of nanofiber mass production, low cost, consistency and the like, and limit the large-area industrial application of core-shell structure nanofibers.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide the needleless air spinning device for preparing the composite nano fibers and the working method thereof, which have the advantages of reasonable structural design, short process flow, high efficiency, high yield and good application prospect, and can obtain the core-shell structure composite nano fibers with different structures and performances.
The invention is realized by the following technical scheme:
the invention discloses a needleless air spinning device for preparing composite nano fibers, which comprises a gas boosting system, an inverted cone rotating body, a core layer spinning solution supply system, a shell layer spinning solution coating system, an end cover, a rotary power system, a high-temperature high-speed air jet system and a receiving device, wherein the core layer spinning solution supply system is arranged on the shell layer spinning solution coating system;
the inner cavity of the inverted cone rotating body is communicated with a gas boosting system and a nuclear layer spinning solution supply system, and the gas boosting system is used for applying pressure to the nuclear layer spinning solution in the inner cavity of the inverted cone rotating body; the bottom of the inverted cone rotating body is provided with a liquid outlet, the top of the inverted cone rotating body is connected with the end cover through a rotary sealing structure, and the inverted cone rotating body is connected with a rotary power system; the shell spinning solution coating system is arranged right opposite to the outer conical surface of the inverted cone rotating body; the high-temperature high-speed airflow jet system and the receiving device are respectively and oppositely arranged on two sides of a liquid outlet at the bottom of the inverted cone rotating body.
Preferably, the taper angle of the inverted cone rotary body is 10-160 °.
Preferably, the core layer spinning solution supply system comprises a liquid storage tank and a liquid supply pipe, one end of the liquid supply pipe is connected with the liquid storage tank, the other end of the liquid supply pipe penetrates through the end cover and extends into the inner cavity of the inverted cone rotating body, a sealing device is arranged between the liquid supply pipe and the end cover, and a valve is arranged on the liquid supply pipe.
Preferably, the shell spinning solution coating system comprises a coating machine and a spray gun, wherein the coating machine is connected with the spray gun, and the spray gun is opposite to the outer conical surface of the inverted cone rotating body.
Preferably, the rotary power system comprises a motor, a transmission system and a rotating shaft, wherein the motor is connected with the transmission system, the transmission system is connected with the rotating shaft, and the rotating shaft is connected with the inverted cone rotating body.
Preferably, the high-temperature high-speed airflow jet system comprises a high-temperature high-speed airflow generating device, a connecting pipe and a plurality of airflow nozzles which are connected in sequence; the air flow nozzle and the receiving device are respectively and oppositely arranged at two sides of a liquid outlet at the bottom of the inverted cone rotating body.
Further preferably, the number of the air flow nozzles is 1-5, and the air outlets of the air flow nozzles are circular, rectangular, triangular or trapezoidal.
Preferably, the receiving device is a plate receiving device or a roller receiving device; when the receiving device is a flat plate receiving device, a plurality of through holes are arranged on the receiving device, and a negative pressure generating device is arranged on one side of the receiving device, which is back to the inverted cone rotating body; when the receiving device is a roller receiving device, a negative pressure generating device is connected inside the receiving device.
The invention discloses a working method of the needleless air spinning device for preparing the composite nano fiber, which comprises the following steps:
step 1: opening a rotary power system to enable the inverted cone rotating body to rotate until the preset rotating speed is reached; opening a high-temperature high-speed airflow injection system to enable airflow to be injected until the airflow is stable and reaches a preset temperature and speed;
step 2: opening a nuclear layer spinning solution supply system to enable the nuclear layer spinning solution to be filled into an inner cavity of the inverted cone rotating body, and opening a gas boosting system to enable the nuclear layer spinning solution to continuously flow out from a liquid outlet at the bottom of the inverted cone rotating body; opening a shell spinning solution coating system to coat the shell spinning solution on the outer conical surface of the inverted cone rotating body and make the shell spinning solution flow downwards along the outer conical surface of the inverted cone rotating body;
and step 3: the shell layer spinning solution wraps the core layer spinning solution to form coaxial liquid drops, and the coaxial liquid drops are blown, pulled and refined by airflow jetted by a high-temperature high-speed airflow jet system and then fly to a receiving device to form the composite nanofiber.
Preferably, the rotating speed of the inverted cone rotating body is 10-3600 r/min; the speed of the core layer spinning solution flowing out of the liquid outlet at the bottom of the inverted cone rotating body is 0.1-10 ml/min; the coating rate of the shell spinning solution is 0.01-10 ml/min; the temperature of the air flow ejected by the high-temperature high-speed air flow ejection system is 10-500 ℃, and the speed is 5-300 m/s.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a needleless air spinning device for preparing composite nano fibers, which is characterized in that core layer spinning solution flowing out from a liquid outlet at the bottom of an inverted cone rotating body and shell layer spinning solution flowing down along an outer conical surface of the inverted cone rotating body form core-shell coaxial liquid drops, so that the defect that an existing spinning head is easy to block is overcome, and the cost of cleaning, maintenance and replacement is greatly reduced. The formed coaxial liquid drops are blown, drawn and refined by a high-temperature high-speed airflow jet system, and the composite nano-fiber with the core-shell structure can be prepared in one step, so that the equipment investment cost is saved, and the production efficiency is improved. The device has the advantages of simple process flow, high automation degree, capability of greatly improving the production efficiency of the composite nanofiber and good application prospect.
Furthermore, the cone angle of the inverted cone rotating body is 10-160 degrees, which is beneficial to controlling the down-flow speed of the shell spinning solution.
Further, the negative pressure generating device can facilitate the product to be adsorbed on the receiving device.
The working method of the needleless air spinning device for preparing the composite nano fibers, disclosed by the invention, is simple to operate, high in automation degree, high in production efficiency and high in yield, and can be used for large-scale industrial production.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a needleless air spinning apparatus for preparing composite nanofibers according to the present invention;
FIG. 2 is a transmission electron microscope image of the composite nanofiber prepared in example 1 of the present invention;
FIG. 3 is a transmission electron microscope image of the composite nanofiber prepared in example 2 of the present invention.
In the figure: the method comprises the following steps of 1-gas boosting system, 2-inverted cone rotating body, 3-core layer spinning solution supply system, 4-shell layer spinning solution coating system, 5-end cover, 6-rotary power system, 7-high temperature high speed airflow jet system and 8-receiving device.
Detailed Description
The invention will now be described in further detail with reference to the following drawings and specific examples, which are intended to be illustrative and not limiting:
referring to fig. 1, the needleless air spinning device for preparing composite nanofibers comprises an air boosting system 1, an inverted cone rotating body 2, a core layer spinning solution supply system 3, a shell layer spinning solution coating system 4, an end cover 5, a rotating power system 6, a high-temperature high-speed air jet system 7 and a receiving device 8.
The taper angle of the inverted cone rotary body 2 is generally 10 to 160 °. The nuclear layer spinning solution supply system 3 comprises a liquid storage tank and a liquid supply pipe, one end of the liquid supply pipe is connected with the liquid storage tank, the other end of the liquid supply pipe penetrates through the end cover 5 to extend into the inner cavity of the inverted cone rotating body 2, a sealing device is arranged between the liquid supply pipe and the end cover 5, and a valve is arranged on the liquid supply pipe. The shell spinning solution coating system 4 comprises a coating machine and a spray gun (a solution propelling device such as a spray can and a syringe can be used as well), and the coating machine is connected with the spray gun. The high-temperature high-speed airflow injection system 7 comprises a high-temperature high-speed airflow generating device, a connecting pipe and a plurality of airflow nozzles which are sequentially connected. The number of the air flow nozzles is generally 1-5, and the shape of the air outlets of the air flow nozzles is generally circular, rectangular, triangular or trapezoidal. The rotating power system 6 comprises a motor, a transmission system and a rotating shaft, wherein the motor is connected with the transmission system, and the transmission system is connected with the rotating shaft. The receiving device 8 is a flat plate receiving device or a roller receiving device; when the receiving device 8 is a flat plate receiving device, a plurality of through holes are arranged on the receiving device 8, and a negative pressure generating device is arranged on one side of the receiving device 8, which is back to the inverted cone rotating body 2; when the receiving device 8 is a drum receiving device, the inside of the receiving device 8 communicates with a negative pressure generating device.
The inner cavity of the inverted cone rotating body 2 is communicated with the gas boosting system 1 and the liquid supply pipes of the nuclear layer spinning solution supply system 3, and the gas boosting system 1 is used for applying pressure to the nuclear layer spinning solution in the inner cavity of the inverted cone rotating body 2; the bottom of back taper rotator 2 is equipped with the liquid outlet, and the top is connected with end cover 5 through rotating seal structure, can be through mechanical structure such as labyrinth seal, broach seal, also can realize sealedly through rotating sealing washer etc.. The inverted cone rotary body 2 is connected with a rotating shaft of a rotary power system 6; a spray gun of the shell spinning solution coating system 4 is arranged right opposite to the outer conical surface of the inverted cone rotating body 2; the airflow nozzle and the receiving device 8 of the high-temperature and high-speed airflow jet system 7 are respectively and oppositely arranged at two sides of the liquid outlet at the bottom of the inverted cone rotator 2.
The relevant parameters for each component can be referenced to the following data:
the inverted cone rotary body 2 can be made of metal materials, inorganic non-metal materials, organic materials, composite materials and the like, and the radius of the top end of the inverted cone rotary body 2 is 1 to50cm, and the radius of a liquid outlet at the bottom is 0.001-10 mm. The horizontal distance between the air flow nozzle and the central line of the inverted cone rotator 2 is 3-50 mm, the vertical distance between the air flow nozzle and the bottommost end of the liquid outlet at the bottom of the inverted cone rotator 2 is 0-50 mm, and the area of the air outlet of the air flow nozzle is 0.1-100 cm2. The horizontal distance between the receiving device 8 and the central line of the inverted cone rotator 2 is 5-150 cm. The core layer spinning solution and the shell layer spinning solution are precursor solutions comprising various organic polymers, inorganic powder and organic and inorganic nano materials.
The working method of the needleless air spinning device for preparing the composite nano fibers comprises the following steps:
step 1: opening the rotary power system 6 to rotate the inverted cone rotating body 2 until the preset rotating speed is reached; opening the high-temperature high-speed airflow injection system 7 to enable airflow to be injected until the airflow is stable and reaches the preset temperature and speed;
step 2: opening the core layer spinning solution supply system 3 to enable the core layer spinning solution to be filled into the inner cavity of the inverted cone rotating body 2, and opening the gas boosting system 1 to enable the core layer spinning solution to continuously flow out from the liquid outlet at the bottom of the inverted cone rotating body 2; opening the shell spinning solution coating system 4 to coat the shell spinning solution on the outer conical surface of the inverted cone rotating body 2 and make the shell spinning solution flow downwards along the outer conical surface of the inverted cone rotating body 2;
and step 3: the shell layer spinning solution wraps the core layer spinning solution to form coaxial liquid drops, and the coaxial liquid drops are blown, pulled and refined by airflow jetted by the high-temperature high-speed airflow jet system 7 and then fly to the receiving device 8 to form the composite nanofiber.
The rotating speed of the inverted cone rotating body 2 is 10-3600 r/min; the speed of the core layer spinning solution flowing out of the liquid outlet at the bottom of the inverted cone rotating body 2 is 0.1-10 ml/min; the coating rate of the shell spinning solution is 0.01-10 ml/min; the temperature of the air flow jetted by the high-temperature high-speed air flow jet system 7 is 10-500 ℃, and the speed is 5-300 m/s.
Example 1
The inverted cone rotary body 2 is made of organic engineering plastics, the radius of the top end is 5cm, the radius of the liquid outlet at the bottom is 0.5mm, the cone angle is 30 ℃, and the rotation speed of the inverted cone rotary body 2 is 600 r/min; the core layer spinning solution is Polyacrylonitrile (PAN) with the mass fraction of 10 percent, and the shell layer spinning solution is polyacrylonitrilePolystyrene (PS) in a quantity fraction of 22%; the output air pressure of the gas boosting system 1 is 0.1MPa, and the outflow rate of the core layer spinning solution is 0.2 ml/min; the coating rate of the shell spinning solution is 0.2 ml/min; the temperature of the airflow sprayed by the airflow nozzle is 70 ℃, the speed is 120m/s, the horizontal distance between the airflow nozzle and the central line of the inverted cone rotator 2 is 8mm, the vertical distance between the airflow nozzle and the bottommost end of the liquid outlet at the bottom of the inverted cone rotator 2 is 3mm, the number of the airflow nozzles is 1, the air outlet of the airflow nozzle is circular, and the area of the air outlet of the airflow nozzle is 0.28cm2(ii) a The receiving device 8 is a flat plate receiving device, is provided with holes, has 100 meshes, is not provided with a negative pressure generating device, and has a horizontal distance of 80cm from the central line of the inverted cone rotating body 2.
The prepared PAN-PS nano-fiber with the core-shell structure is shown in figure 2, wherein the average diameter of the core-layer fiber is 280nm, and the average diameter of the shell-layer nano-fiber is 550 nm.
Example 2
The inverted cone rotary body 2 is made of organic engineering plastics, the radius of the top end is 5cm, the radius of the liquid outlet at the bottom is 0.5mm, the cone angle is 60 ℃, and the rotation speed of the inverted cone rotary body 2 is 500 r/min; the core layer spinning solution is 5 percent of nano titanium dioxide (25 nmTiO) by mass fraction2) The shell layer spinning solution is Polystyrene (PS) with the mass fraction of 20%; the output air pressure of the gas boosting system 1 is 0.08MPa, and the outflow rate of the core layer spinning solution is 0.15 ml/min; the coating rate of the shell spinning solution is 0.22 ml/min; the temperature of the airflow sprayed by the airflow nozzle is 80 ℃, the speed is 150m/s, the horizontal distance between the airflow nozzle and the central line of the inverted cone rotator 2 is 10mm, the vertical distance between the airflow nozzle and the bottommost end of the liquid outlet at the bottom of the inverted cone rotator 2 is 5mm, the number of the airflow nozzles is 1, the air outlets of the airflow nozzles are circular, and the area is 0.5cm2(ii) a The receiving device 8 is a flat plate receiving device, holes are formed in the flat plate receiving device, the mesh number is 80 meshes, a negative pressure generating device is arranged on the back face of the receiving device, and the horizontal distance between the receiving device 8 and the central line of the inverted cone rotating body 2 is 65cm.
Prepared core-shell structure TiO2PS nanofibers in FIG. 3, with core layer nano TiO2The average diameter is 25nm, and the average diameter of the shell layer nano fiber is 450 nm.
It should be noted that the above description is only a part of the embodiments of the present invention, and equivalent changes made to the system described in the present invention are included in the protection scope of the present invention. Persons skilled in the art to which this invention pertains may substitute similar alternatives for the specific embodiments described, all without departing from the scope of the invention as defined by the claims.
Claims (10)
1. The needleless air spinning device for preparing the composite nano fibers is characterized by comprising a gas boosting system (1), an inverted cone rotating body (2), a core layer spinning solution supply system (3), a shell layer spinning solution coating system (4), an end cover (5), a rotary power system (6), a high-temperature high-speed air jet system (7) and a receiving device (8);
the inner cavity of the inverted cone rotating body (2) is communicated with the gas boosting system (1) and the nuclear layer spinning solution supply system (3), and the gas boosting system (1) is used for applying pressure to the nuclear layer spinning solution in the inner cavity of the inverted cone rotating body (2); the bottom of the inverted cone rotating body (2) is provided with a liquid outlet, the top of the inverted cone rotating body is connected with the end cover (5) through a rotary sealing structure, and the inverted cone rotating body (2) is connected with a rotary power system (6); the shell spinning solution coating system (4) is arranged right opposite to the outer conical surface of the inverted cone rotating body (2); the high-temperature high-speed airflow jet system (7) and the receiving device (8) are respectively and oppositely arranged at two sides of a liquid outlet at the bottom of the inverted cone rotating body (2).
2. The needle-free air spinning device for preparing composite nanofibers according to claim 1, wherein the cone angle of the reverse cone rotating body (2) is 10 ° to 160 °.
3. The needle-free air spinning device for preparing composite nano fibers according to claim 1, wherein the core layer spinning solution supply system (3) comprises a liquid storage tank and a liquid supply pipe, one end of the liquid supply pipe is connected with the liquid storage tank, the other end of the liquid supply pipe penetrates through the end cover (5) and extends into the inner cavity of the inverted cone rotating body (2), a sealing device is arranged between the liquid supply pipe and the end cover (5), and a valve is arranged on the liquid supply pipe.
4. The needle-free air spinning device for preparing composite nanofibers according to claim 1, wherein the shell spinning solution coating system (4) comprises a coating machine and a spray gun, the coating machine is connected with the spray gun, and the spray gun is opposite to the outer conical surface of the inverted cone rotating body (2).
5. The needleless air spinning device for preparing the composite nanofiber as claimed in claim 1, wherein the rotary power system (6) comprises a motor, a transmission system and a rotating shaft, the motor is connected with the transmission system, the transmission system is connected with the rotating shaft, and the rotating shaft is connected with the inverted cone rotating body (2).
6. The needleless air spinning device for preparing the composite nanofiber as claimed in claim 1, wherein the high-temperature high-speed air jet system (7) comprises a high-temperature high-speed air jet generating device, a connecting pipe and a plurality of air jet nozzles which are connected in sequence; the airflow nozzle and the receiving device (8) are respectively and oppositely arranged at two sides of a liquid outlet at the bottom of the inverted cone rotating body (2).
7. The needleless air spinning device for preparing the composite nanofiber as claimed in claim 6, wherein the number of the air flow nozzles is 1-5, and the shape of the air outlet of the air flow nozzle is circular, rectangular, triangular or trapezoidal.
8. The needleless air spinning device for preparing composite nanofibers according to claim 1, wherein the receiving device (8) is a flat plate receiving device or a roller receiving device; when the receiving device (8) is a flat plate receiving device, a plurality of through holes are formed in the receiving device (8), and a negative pressure generating device is arranged on one side, back to the inverted cone rotating body (2), of the receiving device (8); when the receiving device (8) is a roller receiving device, a negative pressure generating device is connected inside the receiving device (8).
9. The method for operating the needleless air spinning device for preparing the composite nanofiber according to any one of claims 1 to 8, comprising the following steps:
step 1: opening the rotary power system (6) to enable the inverted cone rotary body (2) to rotate until the preset rotating speed is reached; opening a high-temperature high-speed airflow injection system (7) to enable airflow to be injected until the airflow is stable and reaches a preset temperature and speed;
step 2: opening the core layer spinning solution supply system (3), filling the core layer spinning solution into the inner cavity of the inverted cone rotating body (2), and opening the gas boosting system (1) to enable the core layer spinning solution to continuously flow out from the liquid outlet at the bottom of the inverted cone rotating body (2); opening the shell spinning solution coating system (4) to coat the shell spinning solution on the outer conical surface of the inverted cone rotating body (2) and make the shell spinning solution flow downwards along the outer conical surface of the inverted cone rotating body (2);
and step 3: the shell layer spinning solution wraps the core layer spinning solution to form coaxial liquid drops, and the coaxial liquid drops are blown, pulled and refined by airflow jetted by the high-temperature high-speed airflow jet system (7) and then fly to the receiving device (8) to form the composite nanofiber.
10. The working method of the needleless air spinning device for preparing the composite nano-fiber according to the claim 9, wherein the rotating speed of the inverted cone rotating body (2) is 10-3600 r/min; the speed of the core layer spinning solution flowing out of a liquid outlet at the bottom of the inverted cone rotating body (2) is 0.1-10 ml/min; the coating rate of the shell spinning solution is 0.01-10 ml/min; the temperature of the air flow jetted by the high-temperature high-speed air flow jetting system (7) is 10-500 ℃, and the speed is 5-300 m/s.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116254628A (en) * | 2023-05-15 | 2023-06-13 | 江苏恒力化纤股份有限公司 | Spinning device for spinning cladding yarn with nanofiber on outer layer through rotor spinning |
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| CN116254628A (en) * | 2023-05-15 | 2023-06-13 | 江苏恒力化纤股份有限公司 | Spinning device for spinning cladding yarn with nanofiber on outer layer through rotor spinning |
| CN116254628B (en) * | 2023-05-15 | 2023-08-29 | 江苏恒力化纤股份有限公司 | Spinning device for spinning cladding yarn with nanofiber on outer layer through rotor spinning |
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