CN104726944A - Nozzle preparing nanofiber and device thereof - Google Patents
Nozzle preparing nanofiber and device thereof Download PDFInfo
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- CN104726944A CN104726944A CN201510140006.3A CN201510140006A CN104726944A CN 104726944 A CN104726944 A CN 104726944A CN 201510140006 A CN201510140006 A CN 201510140006A CN 104726944 A CN104726944 A CN 104726944A
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- nozzle
- liquid
- polarizer
- cavity
- buffering
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a nozzle preparing nanofiber and a device thereof. The nozzle comprises a shell sheath with a cavity, at least one liquid inlet for liquid to enter a cavity, at least one discharge outlet for the liquid to get out of the cavity, and a buffering polarizer contained in the cavity and used for transmitting charges into the liquid, and the specific surface area of the buffering polarizer is at least 5 m<2>/kg. The device comprises the nozzle, a power source, a conveying device used for conveying the liquid to the nozzle, and a receiving device used for receiving fiber sprayed out of the nozzle. The power source is provided with a positive electrode port and a negative electrode port, one end of the power source is connected to the buffering polarizer, and the other end of the power source is connected to the receiving device. According to the nozzle preparing nanofiber and the device thereof, the production efficiency is improved by setting the buffering polarizer with the high specific surface area, the discharge outlet is formed in the flat outer surface of the shell sheath, and the phenomenon of corona discharge is reduced.
Description
Technical field
The present invention relates to is a kind of nozzle and equipment thereof of preparing nanofiber, particularly a kind of nozzle and equipment thereof being prepared nanofiber by electrostatic spinning technique.
Background technology
Electrostatic spinning technique utilizes electrostatic force from solution, prepare superfine fibre or yarn, usually in nanometer to micron-scale.Drop is electrically charged under electric field action, electrostatic force can in and surface tension drop is deformed, when electrostatic force be greater than surface tension to a certain extent after, drop can form injection thread, thread divides and solvent evaporation in course of injection, finally obtains nanofiber.Taylor cone can be formed in the place of ejection thread.If the intermolecular force of drop is enough large, thread would not divide, and can form a branch of charged thread.
Fig. 1 is existing electrospinning device 10 schematic diagram.Equipment 10 generally includes a high voltage source 12, syringe 20, and its syringe needle 14 is connected with high voltage source 12, and one receives electrode 16.Polymer Solution for spinning is positioned in parenteral solution 20.
During electrostatic spinning, Polymer Solution 18 applies the drop polarized charged that high pressure makes needle point place.The drop at needle point place moves electrode 16 to reception due to electrostatic force traction, forms conical taylor cone.When electrostatic force is greater than the surface tension of Polymer Solution, solution forms thread from the tip ejection of taylor cone.Charged thread is drawn into superfine fibre 22 under the traction of electrostatic force, is finally collected in and receives on electrode 16.
Electrostatic spinning liquid comprises Polymer Solution, collosol and gel, special suspension and fused solution etc., can be loaded in syringe 20.Liquid is generally flowed out from needle point 14 with fixed flow rate by syringe pump.
Electrostatic spinning technique is difficult to large-scale production fiber.Existing electrostatic spinning technique shortcoming comprises the low and syringe needle of production efficiency and easily blocks.
In addition, corona discharge is a subject matter of existing electrostatic spinning technique, when especially using the Polymer Solution and fused solution without electric conductivity.Electric charge is the basic demand of electrostatic spinning process with higher transfer rate from syringe needle to spinning solution, can be realized by the voltage increased between syringe needle and gathering-device.But the corona discharge under high-pressure situations generally occurs in the maximum place of accumulation, such as most advanced and sophisticated.Therefore the prong shape designed in Fig. 1 very easily produces corona discharge phenomenon.
Therefore, be necessary to provide a kind of novel nozzle preparing nanofiber and equipment thereof to solve the problems referred to above.
Summary of the invention
The object of this invention is to provide a kind of production efficiency is high, corona discharge the is few nozzle preparing nanofiber and equipment thereof.
The present invention is achieved through the following technical solutions above-mentioned purpose: a kind of nozzle preparing nanofiber, comprise with cavity shell sheath, at least one make liquid enter described cavity liquid inlet, at least one make liquid leave described cavity electric discharge outlet and one be contained in described cavity inside for by transferring charge to the buffering polarizer in liquid, the specific area of described buffering polarizer is at least 5 ㎡/kg.
Further, described electric discharge outlet is positioned in the flat outer surface of described shell sheath.
Further, described shell sheath is provided with the conduction port be connected with described buffering polarizer.
Further, described shell sheath is one or both in conductive material and non-conducting material.
Further, described liquid inlet is provided with the storage area for the liquid that prestores.
A kind of equipment preparing nanofiber, comprise nozzle, power supply, for by Liquid transfer to the transport of described nozzle be used for the receiving system receiving the fiber sprayed in described nozzle, described nozzle comprises the shell sheath with cavity, at least one makes liquid enter the liquid inlet of described cavity, at least one make liquid leave described cavity electric discharge outlet and one be contained in described cavity inside for by transferring charge to the buffering polarizer in liquid, the specific area of described buffering polarizer is at least 5 ㎡/kg, described power supply is provided with both positive and negative polarity two ports, wherein one end is connected to described buffering polarizer, the other end is connected to described receiving system.
Further, described power supply is high-voltage DC power supply.
Further, described liquid transporting apparatus comprises the heater for heating liquid.
Further, described heater adopts infrared heating mode.
Further, described liquid transporting apparatus comprises screw rod and for driving the motor of described screw rod.
Compared with prior art, the beneficial effect of nozzle and equipment thereof that the present invention prepares nanofiber is: enhanced productivity by the buffering polarizer arranging high-specific surface area, be located in the flat outer surface of shell sheath by electric discharge outlet, reduce corona discharge phenomenon.
Accompanying drawing explanation
Fig. 1 is conventional electrostatic spinning equipment schematic diagram.
Fig. 2 is a kind of sectional view preparing the nozzle of nanofiber.
Fig. 3 a is a kind of sectional view preparing the nozzle of nanofiber.
Fig. 3 b is the top view of Fig. 3 b.
Fig. 4 is a kind of sectional view preparing the nozzle of nanofiber.
Fig. 5 a is a kind of sectional view preparing the nozzle of nanofiber.
Fig. 5 b is the top view of Fig. 5 a.
Fig. 6 a is a kind of sectional view preparing the nozzle of nanofiber.
Fig. 6 b is the top view of Fig. 6 a.
Fig. 7 a is a kind of sectional view preparing the nozzle of nanofiber.
Fig. 7 b is the top view of Fig. 7 a.
Fig. 8 is a kind of schematic diagram preparing the equipment of nanofiber.
Detailed description of the invention
Fig. 2 is embodiment 1, prepares the schematic diagram of the nozzle 30 of fiber for electrostatic spinning.Nozzle 30 generally includes a shell sheath 32 and a cavity 34.
Shell sheath 32 has a liquid inlet 36, spinning liquid enters cavity 34 by it.Shell sheath 32 also has an electric discharge outlet 38, liquid leaves cavity 34 by it.
Nozzle 30 also comprises a buffering polarizer 40, is positioned in the middle of cavity 34, during spinning by polarizer by electric charge high efficiency of transmission in the liquid in cavity 34.Importantly, the physical dimension of polarizer makes electrode specific surface area be at least 5 ㎡/kg.
Suitable polarizer 40 has a very large specific area, can quickly and easily by transferring charge in the liquid in cavity 34.The structure type of polarizer comprises: line, net, grid, foam, sponge, cloth, braided fabric, fin, parallel-plate, adhesion mealy structure, interwoven material etc.
Shell sheath can with any suitable conduction or non-conducting material, or both materials of coexisting, such as metal, plastics, pottery, rock, timber, paper, bamboo etc.Same, polarizer 40 is examples of the high-specific surface area of a porous, and it fully can contact with liquid when liquid flows into cavity 34.Shell sheath 32 and polarizer 40 also can be prepared into an entirety and use, such as, use 3D printing technique, foundry engieering etc.Embodiment disclosed by the invention can improve breakdown voltage to higher than puncturing the limit (approximately 20 kilovolts every centimetre) in air, and shell sheath material can conduct electricity also can be non-conductive.
Polarizer 40 can have different configurations and arrangement, can the flow velocity of regulates liquid when flowing through cavity 34 during spinning.In embodiment, polarizer 40 optimal design-aside can make liquid flow through the surfaces externally and internally of polarizer 40 with constant flow rate, and the uniform liquid of inflow cavity 34 is polarized.
In embodiment, in order to make spinning solution flow with constant flow rate, the embodiment in Fig. 3 a has reserved a fluid storage space at liquid inlet 36 place, enters cavity 34 again after liquid is full of.
In embodiment, shell sheath 32 also has an electrode ports 44, is connected by polarizer 40 by it with external power source.Therefore, the polarized positively charged of spinning solution when port 44 connects the positive pole of high voltage source, when port 44 connects the negative pole of high voltage source, spinning solution is electronegative.Can be described in detail below.
Electric discharge outlet 38 is opened in the flat outer surface 42 of shell sheath, can reduce corona discharge during spinning.Mention above, a subject matter of conventional electrostatic spinning system uses syringe needle shape nozzle to cause corona discharge exactly.It is effectively solutions that an electric discharge outlet 38 is opened on surface 42 at shell sheath 32 relatively flat disclosed by the invention.
In embodiment, electric discharge outlet 38 is circular, and diameter is between 0.1 millimeter to 10 millimeters.In addition should be understood that embodiment is not the scope in order to arrowhead, the electric discharge outlet 38 of various different size can be used in this field.
Fig. 3 a, 3b are that a relatively simple nozzle 30 for volume production designs.This embodiment middle sleeve 32 is conduits that there is lid at two ends, and the cross section of conduit can be various shape, such as circle, square, rectangle, hexagon etc.One end of conduit is liquid inlet 36, and the other end is conduction port 44, connects polarizer 40 and external power source.For liquid inlet and conduction port position without any restriction, they can in any suitable position.
Fig. 4 is a kind of DESIGN SKETCH of coaxial nozzle, can be used for preparing shell sheath structure nano fiber.In embodiment, it is coaxially be arranged in the middle of another electric discharge outlet 41 that shell sheath 32 opposite position is equipped with conduction outlet 38 and 41. 1 electric discharge outlets 38 that two different liquid inlets 36 and two cavitys, 34, two cavitys connect separately respectively.Two cavitys 40 separate with conductive material, therefore nozzle 30 needs one conduction port 44.
Same, Fig. 5 a, 5b, 6a, 6b, 7a, 7b are the different embodiments of nozzle disclosed by the invention.Difference comprises the shape of shell sheath 32 and cavity 34, the quantity of electric discharge outlet 38 and arrangement.Same, the relative position of conduction port 44, discharge outlet 38 and liquid inlet 36 can adjust as required.
A kind of electrostatic spinning of Fig. 8 prepares molten spinning system 50 schematic diagram of fiber.Molten spinning system can use above-mentioned any one nozzle 30.Molten spinning system 50 generally comprises the power supply that 30, one, a nozzle has both positive and negative polarity two ports.Arbitrary port of power supply is connected with the polarizer in nozzle 30 by conduction port 44.
Molten spinning system 50 comprises a liquid transporting apparatus, for being passed through in liquid inlet 36 input nozzle 30 by spinning solution.Receiving system 62 is connected to the other end of power supply.Use high-voltage DC power supply in the present embodiment.
In the present embodiment, liquid transporting apparatus adopts screw extruding feed 54, and motor 52 drives screw rod to be pressed in nozzle cavity by fused solution.Molten spinning system adopts a kind of macromolecular material as spinning solution.Molten spinning system comprises an environment control unit 58, feedstock transportation entrance 56.System also comprises a heater 64, by screw rod feeding system 54 melt polymer material.
In the present embodiment, the temperature that environment control unit 58 needs maintenance certain is to ensure that Polymer Solution is in melting state.Due to Electric Field Distribution when heater 64 may affect spinning, so utilize infrared ray at safe distance external heat environment control unit 58.Heater 64 is equipped with focus lamp to make full use of heat energy.Nozzle 30 is connected by non-conductive earthenware with screw rod feeding system 54, power supply 60 is applied to high voltage electric field in nozzle on macromolecule fused solution and heater 64 separates.
In addition, receiving system 62 ground connection and cooling, so nanofiber from nozzle 30 spray solidification after be collected in gathering-device 62.
The present invention discloses a kind of method utilizing molten spinning system 50 and nozzle 30 to prepare nanofiber.Comprise the following steps, there is provided a nozzle 30, provide a power supply having both positive and negative polarity two ports, wherein one end is connected with the polarizer in nozzle 30 by conduction port 44, a macromolecule melt liquid generation device 54 is provided, spinning solution is transported in nozzle 30 by liquid inlet 36.
This method also comprises provides a receiving system 62, it is connected with the power supply other end, for collect from nozzle 30 discharge outlet 38 spray nanofiber.Connect power supply 60 and macromolecule melt liquid generation device 54 producd fibers.Method disclosed by the invention utilizes the non-conductive liquid of nozzle 30 Static Spinning, and liquid can apply high voltage electric field safely, guaranteeing can normally spinning.Buffering polarizer 40 in shell sheath 32 enhances polarization efficiency.
Electric discharge outlet is opened the number of locations in sleeve pipe 32 relatively flat position and reasonable arrangement outlet, effectively can improve corona discharge phenomenon and the spinning efficiency that causes thus low.
Should understand embodiment described above is not to limit the scope of the invention.For embodiment any change or amendment all within the scope of the invention.
The all descriptions of the present invention, unless there are specified otherwise, words such as " comprising " includes the parameter and data mentioned in embodiment, but does not get rid of other any possible parameters.
Embodiments of the invention are not get rid of other examples.An embodiment can confirm some aspect of the present invention, and another embodiment can confirm other aspect of the present invention simultaneously.These embodiments are intended to make the art personnel better understand and perform the present invention, instead of limit the scope of the invention, except the content having a specified otherwise.
Claims (10)
1. prepare the nozzle of nanofiber for one kind, it is characterized in that, comprise with cavity shell sheath, at least one make liquid enter described cavity liquid inlet, at least one make liquid leave described cavity electric discharge outlet and one be contained in described cavity inside for by transferring charge to the buffering polarizer in liquid, the specific area of described buffering polarizer is at least 5 ㎡/kg.
2. the nozzle preparing nanofiber according to claim 1, is characterized in that: described electric discharge outlet is positioned in the flat outer surface of described shell sheath.
3. the nozzle preparing nanofiber according to claim 1, is characterized in that: described shell sheath is provided with the conduction port be connected with described buffering polarizer.
4. nozzle and the equipment thereof preparing nanofiber according to claim 1, is characterized in that: described shell sheath is one or both in conductive material and non-conducting material.
5. nozzle and the equipment thereof preparing nanofiber according to claim 1, is characterized in that: described liquid inlet is provided with the storage area for the liquid that prestores.
6. prepare the equipment of nanofiber for one kind, it is characterized in that: comprise nozzle, power supply, for by Liquid transfer to the transport of described nozzle be used for the receiving system receiving the fiber sprayed in described nozzle, described nozzle comprises the shell sheath with cavity, at least one makes liquid enter the liquid inlet of described cavity, at least one make liquid leave described cavity electric discharge outlet and one be contained in described cavity inside for by transferring charge to the buffering polarizer in liquid, the specific area of described buffering polarizer is at least 5 ㎡/kg, described power supply is provided with both positive and negative polarity two ports, wherein one end is connected to described buffering polarizer, the other end is connected to described receiving system.
7. the equipment preparing nanofiber according to claim 6, is characterized in that: described power supply is high-voltage DC power supply.
8. the equipment preparing nanofiber according to claim 6, is characterized in that: described liquid transporting apparatus comprises the heater for heating liquid.
9. the equipment preparing nanofiber according to claim 8, is characterized in that: described heater adopts infrared heating mode.
10. the equipment preparing nanofiber according to claim 6, is characterized in that: described liquid transporting apparatus comprises screw rod and for driving the motor of described screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510140006.3A CN104726944B (en) | 2015-03-28 | 2015-03-28 | A kind of nozzle and its equipment for preparing nanofiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510140006.3A CN104726944B (en) | 2015-03-28 | 2015-03-28 | A kind of nozzle and its equipment for preparing nanofiber |
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| CN104726944A true CN104726944A (en) | 2015-06-24 |
| CN104726944B CN104726944B (en) | 2017-07-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109673A (en) * | 1984-12-20 | 1986-06-10 | 帝国化学工业公司 | Electrostatic spray |
| SU1524936A1 (en) * | 1987-08-03 | 1989-11-30 | Кишиневское научно-производственное объединение технологии электробытового машиностроения | Apparatus for electrostatic deposition of pulverulent materials |
| JP2012001865A (en) * | 2010-06-21 | 2012-01-05 | National Institute Of Advanced Industrial & Technology | Fibrous composite material and method for producing the same, and fiber member and functional device which include fibrous composite material |
| CN102660785A (en) * | 2012-05-31 | 2012-09-12 | 苏州大学 | Bubble electrostatic spinning device |
| CN102703998A (en) * | 2012-06-21 | 2012-10-03 | 中原工学院 | Jet yarn spinning device for electrostatic spun nano fiber and preparing method |
| CN204530035U (en) * | 2015-03-28 | 2015-08-05 | 昆山同日精密测试设备有限公司 | A kind of nozzle and equipment thereof preparing nanofiber |
-
2015
- 2015-03-28 CN CN201510140006.3A patent/CN104726944B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109673A (en) * | 1984-12-20 | 1986-06-10 | 帝国化学工业公司 | Electrostatic spray |
| SU1524936A1 (en) * | 1987-08-03 | 1989-11-30 | Кишиневское научно-производственное объединение технологии электробытового машиностроения | Apparatus for electrostatic deposition of pulverulent materials |
| JP2012001865A (en) * | 2010-06-21 | 2012-01-05 | National Institute Of Advanced Industrial & Technology | Fibrous composite material and method for producing the same, and fiber member and functional device which include fibrous composite material |
| CN102660785A (en) * | 2012-05-31 | 2012-09-12 | 苏州大学 | Bubble electrostatic spinning device |
| CN102703998A (en) * | 2012-06-21 | 2012-10-03 | 中原工学院 | Jet yarn spinning device for electrostatic spun nano fiber and preparing method |
| CN204530035U (en) * | 2015-03-28 | 2015-08-05 | 昆山同日精密测试设备有限公司 | A kind of nozzle and equipment thereof preparing nanofiber |
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| CN104726944B (en) | 2017-07-11 |
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Effective date of registration: 20170515 Address after: 201800, J593, room 2, 4268 South Main Road, Jiading District, Shanghai Applicant after: Shanghai Tong Rui Cci Capital Ltd Address before: Suzhou City, Jiangsu province 215345 Kunshan Dianshan Lake Town Minhe Road East Applicant before: Kunshan Tungray Precision Testing Co., Ltd. |
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Effective date of registration: 20200902 Address after: No. 3 Dingjiabang Road, Dianshan Lake Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kunshan Tongri robot intelligent technology Co., Ltd Address before: 201800, J593, room 2, 4268 South Main Road, Jiading District, Shanghai Patentee before: SHANGHAI TONGRUI INVESTMENT MANAGEMENT Co.,Ltd. |