WO2011118893A1 - 방사영역의 온도와 습도를 조절할 수 있는 나노섬유제조용 전기방사장치 - Google Patents
방사영역의 온도와 습도를 조절할 수 있는 나노섬유제조용 전기방사장치 Download PDFInfo
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- WO2011118893A1 WO2011118893A1 PCT/KR2010/007123 KR2010007123W WO2011118893A1 WO 2011118893 A1 WO2011118893 A1 WO 2011118893A1 KR 2010007123 W KR2010007123 W KR 2010007123W WO 2011118893 A1 WO2011118893 A1 WO 2011118893A1
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- process gas
- spinning
- unit
- laminar flow
- nanofibers
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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
Definitions
- the present invention relates to an electrospinning apparatus for manufacturing nanofibers, and more particularly, to provide a laminar flow of process gas in the spinning zone so that the temperature and humidity of the spinning zone can be adjusted to a certain range suitable for nanofiber production by electrospinning. It relates to an electrospinning apparatus.
- Electrospinning apparatus for producing nanofibers is generally a spinning solution (polymer solution) storage tank, spinning solution metering device, a nozzle block, a plurality of nozzles arranged in the nozzle block, a collector for integrating nanofibers emitted through the nozzle And a power supply unit for applying a voltage to the nozzle block and the collector.
- spinning solution polymer solution
- the type of polymer and solvent used, the concentration of the polymer solution, the temperature and humidity of the spinning chamber affect the fiber diameter and the radioactivity of the nanofibers to be spun.
- the “humidity” is to refer to the “relative humidity”.
- the higher the molecular weight of the polymer the higher the viscosity of the polymer solution tends to increase the diameter of the nanofibers to be spun.
- the boiling point (volatilization temperature) of the solvent of the polymer solution affects the solidification rate of the spinning polymer solution, the diameter of the nanofiber diameter in the area where the polymer solution forms the nanofibers through the jet stream (i.e., the radiation area) It will have a direct impact.
- the boiling point of the solvent is low, the volatilization speed of the solvent is fast, and the fiber diameter is relatively thick, and when the boiling point is high, the fiber diameter is relatively thin.
- the temperature in the region where electrospinning occurs (hereinafter referred to as the "spinning region") changes the viscosity of the spinning solution to change the surface tension of the spinning solution, so that the spun fibers This will affect the diameter.
- the fiber diameter is made relatively thin, and when the viscosity is high because the temperature is relatively low, the fiber diameter is relatively thick.
- the so-called electro-blowing spinning technology is provided with an air injection port for injecting high speed air around the spinning nozzle in which the polymer solution is spun, and injecting high-speed compressed air to the nanofibers emitted from the spinning nozzle. It is disclosed in Korean Patent No. 10-549140.
- the conventional electro-blowing spinning device is suitable for mass production of nanofibers, but air turbulence in the radiation region is due to the turbulence flow and transition zones. Occurs and the solidification rate of the fiber becomes uneven. As a result, as shown in Figures 7 and 8, there is a disadvantage that the change in the fiber diameter of the nanofibers produced is severe and the fiber diameter is thick.
- the present invention is to control the temperature and humidity of the spinning area by controlling the temperature and humidity of the spinning area as a process gas of a laminar flow in the process area controlled to a constant temperature and humidity to produce nanofibers of uniform fiber diameter with high productivity. It is an object to provide a spinning device.
- Another object of the present invention is to provide an electrospinning device for manufacturing nanofibers, which solves the problem that the nanofibers radiated from the front end of the spinning nozzle flow in the reverse direction in the radial direction and are attached to the spinning nozzle block.
- a spinning solution supply unit for supplying a spinning solution obtained by dissolving a nanofiber raw material as a solvent;
- a spinning unit comprising a plurality of spinning nozzles for spinning the spinning solution supplied from the spinning solution supply unit to a lower spinning area, and a nozzle block for arranging and supporting the plurality of spinning nozzles at regular intervals;
- a nanofiber collecting unit disposed to face the spinning nozzle of the spinning unit to collect nanofibers emitted from the spinning unit;
- a power supply unit that forms an electric field in the radiation region between the spinning unit and the nanofiber collecting unit to impart an electrical tensile force to the fibers radiated from the spinning unit;
- a process gas supply unit generating and supplying a process gas for controlling the radiation region to a temperature and humidity range suitable for electrospinning conditions of nanofibers;
- a process gas laminar flow distribution mechanism for dividing the process gas provided by the process gas supply unit into a laminar flow therein and distributing it toward the radiation region at the top of the radiating
- the process gas laminar flow distribution mechanism is provided with a nozzle block of the spinning unit at an inner lower end thereof to form a chamber on the upper side of the spinning nozzle to receive a process gas supplied from the process gas supply part, and supply gas to the process gas supply part.
- a casing having an inlet for introducing the gas into the chamber; and a process gas installed in the lower portion of the casing, and classified into a laminar flow of the process gas contained in the inner space of the casing, so as to extend downward from the bottom of the nozzle block.
- a laminar flow distribution plate having a plurality of outlets for uniform distribution.
- the laminar flow distribution mechanism of the present invention is disposed across the inside of the casing to divide the process gas distribution chamber into an upper first distribution chamber and a lower second distribution chamber in communication with the inlet, and the first distribution.
- the apparatus may further include an intermediate sorting plate having a plurality of first gas distribution holes configured to classify the process gas of the chamber as a primary and to distribute the process gas to the second distribution chamber.
- the nozzle block of the radiating unit disposed inside the casing is attached to a supporting plate which is installed in the transverse direction inside the lower portion of the casing and is fixed to the inside of the casing, and the supporting plate fixes the process gas in the chamber to the laminar flow distribution plate.
- a plurality of through holes is provided to pass toward the side.
- the laminar flow distribution plate is disposed at a distance of 2 to 20 cm from the tip of the spinning nozzle.
- the process gas supplied from the process gas supply unit is preferably controlled to maintain a temperature of 40 ⁇ 70 °C and relative humidity of 20 ⁇ 50%.
- the outlet of the laminar flow distribution plate is preferably maintained in the ratio of the length to diameter of 2 to 5.
- the lower tip of the casing extends vertically to the tip of the spinneret to maintain the process gas distributed to the front end side region of the spinneret in a laminar flow state.
- the temperature and humidity of the spinning zone can be adjusted under optimum conditions to obtain a uniform and narrow diameter nanofiber product.
- gas flow is a laminar flow in the distribution region of the process gas, that is, the spinning region, volatilization of the solvent occurs uniformly, and as a result, fibers having a uniform diameter can be obtained.
- the process gas distributed in the radiation zone facilitates the discharge by volatilization of the solvent, so the productivity is significantly increased.
- the spinning unit is present inside the process gas supply, which is controlled to a constant temperature, so that the temperature of the supplied solution can be kept constant.
- the viscosity of the spinning solution is kept constant, even if there is a change in the viscosity of the solution during the process, it is always possible to obtain a fiber having a uniform diameter. Since only the atmospheric temperature and humidity of a part of the radiation chamber need to be controlled, the air conditioning is required compared to operating the air conditioning system of the entire spinning room to control the temperature and humidity of the conventional radiation region. The cost can be greatly reduced. Since the position of the secondary distribution plate for distributing the process gas into the radiation region is spaced apart by a predetermined distance from the tip of the spinning nozzle, it is possible to solve the problem that the spinning fibers are bent in the reverse direction and attached to the secondary distribution plate.
- FIG. 1 is a schematic configuration diagram of an electrospinning apparatus for producing nanofibers according to the present invention.
- Figure 2 is a perspective view of one embodiment of the process gas laminar flow distribution device of the present invention, a side wall removed.
- FIG 3 is a cross sectional view of an embodiment of the process gas laminar flow distribution device of the present invention.
- FIG. 4 is a side cross-sectional view of an embodiment of the process gas laminar flow distribution device of the present invention.
- Figure 5 is an electron micrograph of the cross section of the nanofiber web produced by the electrospinning apparatus according to the present invention.
- FIG 6 is an electron micrograph of the product surface of the nanofiber web produced by the electrospinning apparatus according to the present invention.
- FIG. 7 is an electron micrograph of a cross section of a nanofiber web manufactured by a conventional blowing electrospinning apparatus.
- the electrospinning apparatus for manufacturing nanofibers according to the present invention the spinning solution storage tank 11 for storing the spinning solution in which the nanofiber raw material is dissolved in a solvent, and stored in the spinning solution storage tank 11
- a spinning solution supply unit (10) comprising a quantitative supply pump (12) for supplying a spinning solution quantitatively;
- a spinning unit (30) for spinning the spinning solution supplied from the metered feed pump (12) through a plurality of spinning nozzles (32) installed on the nozzle block (31);
- a nanofiber collecting unit 40 for accumulating nanofibers radiated through the plurality of spinning nozzles 32;
- a power supply unit 50 that applies an electric voltage between the spinning unit 30 and the nanofiber collecting unit 40 to impart an electric field to the spinning zone Z between the spinning unit 30 and the nanofiber collecting unit 40.
- a solvent gas discharge device 60 for discharging the solvent gas volatilized from the emitted nanofibers to the outside.
- the electrospinning apparatus of the present invention includes a process gas supply unit 20 which generates a process gas that acts as an atmosphere of the radiation zone Z, and controls it at a constant temperature and humidity.
- the "process gas” refers to a gas provided to the radiation zone for controlling the temperature and humidity of the nanofiber radiation zone Z between the spinning unit 30 and the nanofiber collecting unit 40, and the same meaning also below. Used.
- the process gas is preferably air, but is not limited thereto, and other gases and mixed gases of air are also included.
- the process gas supply unit 20 controls the temperature and humidity of the process gas generator 21 and the process gas generated by the process gas generator 21 in a range suitable for nanofiber electrospinning to the spinning unit 30. ) And an air conditioner 22 provided in the radiation zone Z between the nanofiber collecting unit 40.
- the air conditioner 22 controls the temperature of the process gas in a range of 20 to 100 ° C., preferably 40 to 70 ° C., and a relative humidity of 10 to 90% RH, preferably depending on the type of spinning solution used. Controls in the range of 20-50%.
- the process gas generator 21 refers to an apparatus for supplying a process gas to a distribution chamber of a process gas laminar flow distribution apparatus described later, such as a blower fan or a compressor.
- the process gas generator 21 generates a process gas and supplies it to the radiation zone Z, and also supplies it into the spinning solution storage tank 11 to discharge the spinning solution filled in the spinning solution storage tank 11. Used to let
- the radiation unit 30 of the present invention is composed of a nozzle block 31 and a plurality of spinning nozzles 32 arranged at regular intervals in the nozzle block (31).
- the spinning unit 30 receives the spinning solution supplied by the fixed-quantity supply pump 12 through the supply pipe 33 and discharges it to the spinning nozzle 32 through the nozzle block 31.
- the present invention divides the process gas provided from the process gas supply unit 20 into laminar flow therein and distributes the process gas toward the radiation region Z from the top of the radiation unit 30.
- Process gas laminar flow distribution mechanism (100).
- the process gas laminar flow distribution mechanism 100 includes a casing 101 having an inlet 103 for introducing a supply gas of the process gas supply unit 20 therein, as shown in FIGS. 2 to 4. .
- the casing 101 is provided with a nozzle block 31 of the spinning unit 30 at an inner lower end thereof to accommodate a process gas supplied from the process gas supply unit 20 above the spinning nozzle 32 ( 130).
- the laminar flow distribution mechanism 100 includes a laminar flow distribution plate 131 which is installed under the casing 101 and forms the bottom of the chamber 130, and the laminar flow distribution plate 131 is the chamber 130. And a plurality of outlets 132 so as to divide the process gas contained in the laminar flow into a laminar flow and to distribute the process gas uniformly toward the spinning nozzle 32 extending downward from the bottom of the nozzle block 31.
- the distance from the laminar flow distribution plate 131 to the tip of the spinning nozzle 32 is preferably maintained in the range of 2 ⁇ 20cm.
- the casing 101 has a lower end extending vertically to the front end of the spinning nozzle 32 to maintain the process gas discharged through the outlet 132 of the laminar flow distribution plate 131 in a laminar flow state.
- the lower tip portion of the casing 101 is expanded to the outside to induce the process gas to radially expand.
- a plurality of laminar flows flows through the outlet 132 of the laminar flow distribution plate 131 at the bottom of the process gas introduced into the chamber 130 through the inlet 103. It is classified as a flow and passes through the spinning nozzle 32 below the nozzle block 31, and is distributed in the laminar zone in the radiation zone (Z).
- the laminar flow of the process gas maintains the radiation zone Z at a predetermined temperature and humidity suitable for the spinning process.
- Each outlet 132 of the laminar flow distribution plate 131 is preferably a ratio (L / D) of the length (L) to the diameter (D) of 2 to 5.
- the ratio of the length to the diameter of each outlet can be adjusted to maintain the process gas distribution flow rate per spin nozzle in the range of 0.1 ⁇ 1.0 m3 / min.
- the chamber 130 is divided into an upper first dispensing chamber 110 and a lower second dispensing chamber 120 by an intermediate sorting plate 111 installed across the inside of the casing 101.
- the first distribution chamber 110 communicates with the inlet 103 to receive the process gas provided from the process gas supply unit 20.
- the middle splitter plate 111 includes a plurality of first gas distribution holes 112 arranged at regular intervals over the entire surface, and the process gas introduced into the first distribution chamber 110 receives the first gas distribution holes 112. And classifies through the second distribution chamber 120. As such, the process gas is converted into stable laminar flow while passing through the first distribution chamber 110 and the second distribution chamber 120 in the casing 101.
- the support plate 121 includes a plurality of through holes 122 to pass the process gas in the second distribution chamber 120 toward the laminar flow distribution plate 131.
- the process gas of the second distribution chamber 120 passes through the through hole 122 of the support plate 121 and is further classified into laminar flow.
- electrospinning was performed under the process conditions described below.
- Nylon 66 (Nylon 66) having a molecular weight of 35,000 Mw was dissolved in formic acid to prepare a spinning solution having a concentration of 25%.
- a plurality of spinning nozzles 32 having a nozzle diameter Dt of 0.52 mm and a length Lt of 12.5 mm are installed in a nozzle block 31 composed of a rectangular cube of 500 mm in length and 120 mm in width at intervals of 20 mm along the length direction. These spinning nozzles were installed at a distance of 250 mm from the collector to provide a radiation zone between the nozzle and the collector.
- nanofibers having a fiber diameter of 400 to 600 nm and an effective width of 300 mm was obtained.
- nanofiber manufacturing apparatus of the present invention as shown in FIGS. 5 and 6, nanofibers having a uniform diameter could be obtained.
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Abstract
Description
Claims (9)
- 나노섬유 원료를 용매로 용해한 방사용액을 공급하는 방사용액 공급부(10);방사용액 공급부(10)에서 공급되는 방사용액을 하측의 방사영역(Z)으로 방사하는 복수개의 방사노즐(32)과, 상기 복수개의 방사노즐(32)을 일정한 간격으로 배치하여 지지하는 노즐블록(31)로 이루어진 방사 유닛(30);상기 방사유닛(30)의 방사노즐(32)과 대향하게 배치되어 방사 유닛(30)에서 방사하는 나노섬유를 수집하는 나노섬유 수집부(40);상기 방사 유닛(30)에서 방사되는 섬유에 전기적인 인장력을 부과하기 위하여 상기 방사유닛(30)과 나노섬유 수집부(40) 사이의 방사영역(Z)에 전기장을 형성하는 전원장치(50);상기 방사영역(z)을 나노섬유의 전기방사조건에 맞는 온도와 습도 범위로 제어하기 위한 공정기체를 발생시켜 공급하는 공정기체 공급부(20);상기 공정기체 공급부(20)에서 제공되는 공정기체를 내부에서 층류로 분류하여 상기 방사 유닛(30)의 상부에서 방사영역(Z)을 향하여 분배하는 공정기체 층류 분배 기구(100)를 포함한 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제1항에 있어서,상기 공정기체 층류 분배 기구(100)는,상기 방사유닛(30)의 노즐블록(31)을 내부 하단에 설치하여 상기 공정기체 공급부(20)에서 공급되는 공정기체를 수용하는 챔버(130)를 상기 방사노즐(32)의 상측에 형성하고, 상기 공정기체 공급부(20)의 공급기체를 챔버(130)안으로 유입시키는 유입구(103)를 구비한 케이싱(101)과,상기 케이싱(101)의 하부에 설치되고, 상기 챔버(130)에 수용된 공정기체를 층류의 흐름으로 분류하여(fractionating) 상기 노즐블록(31)의 하단에서 아래쪽으로 연장된 방사노즐(32)을 향하여 균일하게 분배하는 복수개의 배출구(132)를 형성한 층류 분배판(131)을 포함한 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제2항에 있어서,상기 케이싱(101)의 내부에 가로지르게 설치되어, 상기 공정기체 분배 챔버(130)를, 상기 유입구(103)와 연통되는 상측의 제1 분배 챔버(110)와 하측의 제2 분배 챔버(120)로 분할하고, 상기 제1 분배 챔버(110)의 공정기체를 1차로 분류하여 상기 제2 분배 챔버(120)로 분배하는 복수개의 제1 기체분배구멍(112)을 구비한 중간 분류판(111)을 더 포함한 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제3항에 있어서,상기 케이싱(101)의 내부에 배치되는 방사유닛(30)의 노즐블록(31)은, 상기 케이싱(101)의 하부 내측에 횡방향으로 설치되는 지지플레이트(121)에 부착되어 케이싱(101)의 내부에 고정되고, 상기 지지플레이트(121)는 상기 챔버(130) 내의 공정기체를 층류 분배판(131)쪽으로 통과시키도록 복수개의 관통 구멍(122)을 구비한 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제2항에 있어서,상기 층류 분배판(131)은 저면에서 상기 방사노즐(32)의 선단까지 2~20cm의 거리를 두고 배치된 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제1항에 있어서,상기 공정기체 공급부(20)에서 공급되는 공정기체는 20 ~100℃, 바람직하게는 40~70℃의 온도와 10~90 %, 바람직하게는 20~50%의 상대습도를 유지하도록 제어되는 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제2항에 있어서,상기 층류 분배판(131)의 배출구(132)는 직경(D)에 대한 길이(L)의 비(L/D)가 2~5인 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제2항에 있어서,상기 케이싱(101)은 하부 선단이 상기 방사노즐(32)의 선단까지 수직으로 연장되어 상기 층류 분배판(131)의 배출구(132)를 통하여 배출되는 공정기체를 층류 상태로 유지시키는 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
- 제1항에 있어서,상기 공정기체는 공기인 것을 특징으로 하는 나노섬유 제조용 전기방사장치.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US13/501,340 US8562326B2 (en) | 2010-03-24 | 2010-10-18 | Electrospinning apparatus for producing nanofibres and capable of adjusting the temperature and humidity of a spinning zone |
JP2012533098A JP5580901B2 (ja) | 2010-03-24 | 2010-10-18 | 紡糸領域の温度および湿度を調節できるナノ繊維製造用の電界紡糸装置 |
EP10848535.0A EP2520695B1 (en) | 2010-03-24 | 2010-10-18 | Electrospinning apparatus for producing nanofibres and capable of adjusting the temperature and humidity of a spinning zone |
CN201080046076.8A CN102597341B (zh) | 2010-03-24 | 2010-10-18 | 纺丝区域温度湿度可调的、制造纳米纤维的电纺丝装置 |
Applications Claiming Priority (2)
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KR1020100026447A KR101166675B1 (ko) | 2010-03-24 | 2010-03-24 | 방사영역에서의 온도와 습도를 조절할 수 있는 나노섬유제조용 전기방사장치 |
KR10-2010-0026447 | 2010-03-24 |
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WO2011118893A1 true WO2011118893A1 (ko) | 2011-09-29 |
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US (1) | US8562326B2 (ko) |
EP (1) | EP2520695B1 (ko) |
JP (1) | JP5580901B2 (ko) |
KR (1) | KR101166675B1 (ko) |
CN (1) | CN102597341B (ko) |
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KR20140107964A (ko) * | 2013-02-28 | 2014-09-05 | 삼성전기주식회사 | 전기 방사 장치 |
WO2014160045A1 (en) * | 2013-03-14 | 2014-10-02 | Cornell University | Electrospinning apparatuses & processes |
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Also Published As
Publication number | Publication date |
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EP2520695B1 (en) | 2014-10-01 |
US20130011508A1 (en) | 2013-01-10 |
KR101166675B1 (ko) | 2012-07-19 |
EP2520695A4 (en) | 2013-12-25 |
CN102597341B (zh) | 2015-01-21 |
KR20110107218A (ko) | 2011-09-30 |
CN102597341A (zh) | 2012-07-18 |
JP2013506768A (ja) | 2013-02-28 |
US8562326B2 (en) | 2013-10-22 |
JP5580901B2 (ja) | 2014-08-27 |
EP2520695A1 (en) | 2012-11-07 |
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