KR20160126469A - Nano fiber filter and method of manufacturing the same - Google Patents
Nano fiber filter and method of manufacturing the same Download PDFInfo
- Publication number
- KR20160126469A KR20160126469A KR1020150057481A KR20150057481A KR20160126469A KR 20160126469 A KR20160126469 A KR 20160126469A KR 1020150057481 A KR1020150057481 A KR 1020150057481A KR 20150057481 A KR20150057481 A KR 20150057481A KR 20160126469 A KR20160126469 A KR 20160126469A
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- South Korea
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- nozzle
- nanofibers
- nanofiber
- longitudinal direction
- solution
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
- F02C7/052—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles with dust-separation devices
Abstract
The present invention relates to a method of manufacturing a nanofiber filter, and more particularly, to a method of fabricating a nanofiber filter using bottom-up electrospinning, which comprises the steps of: forming a bottom-up electrospinning unit The present invention relates to a method of manufacturing a nanofiber filter having different weights of nanofibers in the longitudinal direction (MD), in which a nozzle block is designed to have 2, 3 or 9 parts in the longitudinal direction (MD) To a nanofiber filter having different basis weights of nanofibers in an adjustable longitudinal direction (MD), and a method for producing the same.
Description
The present invention relates to a method of manufacturing a nanofiber filter having different basis weights in a planar direction, and more particularly, to a method of manufacturing a nanofiber filter having different basis weights in the longitudinal direction (MD) and a nanofiber filter manufactured thereby.
Generally, a nanofiber refers to a microfiber having a diameter of only a few tens to a few hundred nanometers, and is produced by an electric field. That is, nanofibers generate electrical repulsive force inside the polymer material by applying a high voltage electric field to the polymer material, which is the raw material, and the nanofibers are manufactured and produced by breaking the molecules into a nano-sized yarn shape.
At this time, as the electric field becomes stronger, the polymer material as the raw material is finely torn, so that a nanofiber having a thinning of 10 to 1000 nm can be obtained.
In the conventional technology for spinning nanofibers, since it is limited to a small-scale working line focused on a laboratory, there is a demand for a technique of spinning nanofibers by dividing a spinning zone and using a unit concept.
On the other hand, in the conventional electrospinning device, a spinning solution is electrospun on one surface of a substrate supplied from the outside, and a nanofiber filter is laminated to produce nanofibers. That is, the conventional electrospinning device comprises a bottom-up or bottom-down electrospinning device, and electrospinning the spinning solution only on the lower surface or the upper surface of the substrate supplied into the electrospinning device to form a nanofiber filter.
As described above, since the electrospinning device is composed of the bottom-up electrospinning device or the top-down electrospinning device, the spinning solution is electrospun on the bottom surface or the top surface of the substrate supplied from the outside and transported in a predetermined direction, can do.
As shown in FIG. 1, the top-down electrospinning device of the bottom-up or top-down electrospinning device includes a spinning solution
In the method of manufacturing the nanofiber filter through the
At this time, in the
When the nanofiber filter manufactured by electrospinning a polymer spinning solution through the electrospinning device as described above is used as a filter material used in an industrial field, the basis weight of the entire nanofiber filter used as the filter material must be constant and uniform In the case of a filter used in a gas turbine of a thermal power plant, it is possible to manufacture and sell products satisfying the standard specifications. Depending on the direction of air inflow, the position of the inflow portion of the air, the direction of the air portion of the air, In some cases, the basis weight of the nanofiber filter constituting the filter material does not need to be constant. On the other hand, in the filter portion in which air filtration is active, the basis weight of the nanofiber filter should be controlled to be small in order to increase the air filtering efficiency. Since the air filter does not have a large air flow rate, the basis weight of the nanofiber filter There is a need for a design that is more durable than the air filtration side.
Thus, the basis weight of the nanofiber filter is required to be a nanofiber filter material having different basis weights on the same nanofiber filter depending on the positions of the air inlet and outlet.
Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a nanofiber filter having different basis weights in the longitudinal direction (MD) of the nanofiber filter layer in the planar direction of the nanofiber filter layer in manufacturing the nanofiber filter, And a method thereof.
In order to solve the above problems,
A substrate;
At least one nanofiber layer laminated on the substrate by electrospinning;
And a bonding layer formed between the substrate, the nanofiber layer and the nanofiber layer, the method comprising:
Wherein the nanofiber layer has different basis weights of the nanofibers in the longitudinal direction (MD)
Wherein the adhesive layer is formed by electrospinning a low-melting-point polymer solution, and provides a method for manufacturing a nanofiber filter.
The present invention can improve the durability and the productivity of nanofiber production by providing a nanofiber filter having different basis weights in the longitudinal direction (MD).
1 is a side view schematically showing a nanofiber filter electrospinning device,
2 is a plan view schematically showing a nozzle body arranged in a nozzle block of a nanofiber filter electrospinning apparatus according to the present invention,
3 is a perspective view schematically showing a nozzle body arranged in a nozzle block of a nanofiber filter electrospinning apparatus according to the present invention,
4 is a side view schematically showing a nozzle body arranged in a nozzle block of a nanofiber filter electrospinning apparatus according to the present invention,
FIGS. 5 to 6 are diagrams showing an operation process in which the polymer spinning solution is electrospun on the same plane of the substrate through the nozzles of each nozzle tube of the nanofiber filter electrospinning apparatus according to the present invention (in FIG. 5, A nozzle indicated by a broken line in Fig. 6 is located at a lower portion of the substrate); Fig.
Figures 7 to 8 are plan views of a nanofiber filter in a longitudinal direction (MD) produced by the present invention.
An electrospinning device for manufacturing and producing nanofibers includes a spinning liquid main tank filled with spinning solution, a metering pump for supplying a fixed amount of spinning solution, a nozzle block having a plurality of nozzles for discharging spinning solution, And a voltage generating device for generating a voltage and a collector for accumulating the fibers that are positioned at the lower end of the nozzle and emit radiation.
The electrospinning device having the above-described structure includes a spinning liquid main tank filled with a spinning solution, a metering pump for supplying a fixed amount of the polymer spinning solution filled in the spinning solution main tank, and a polymer spinning solution in the spinning solution main tank A nozzle block having a plurality of nozzles arranged in a pin shape and arranged to discharge the polymer solution, and a collector disposed at an upper end of the nozzle and spaced apart from the nozzle by a predetermined distance in order to accumulate the polymer solution, And a unit including the apparatus.
Here, the electrospinning device is divided into a bottom-up electrospinning device, a top-down electrospinning device, and a horizontal electrospinning device depending on the direction on the collector. That is, the electrospinning device has a configuration in which the collector is located at the upper end of the nozzle, and a bottom-up electrospinning device capable of manufacturing a uniform and relatively thin nanofiber filter, a collector is disposed at the lower end of the nozzle, A top-down electrospinning device capable of producing a relatively thick nanofiber filter and capable of increasing the production amount of nanofibers per unit time, and a horizontal electrospinning device having a collector and nozzles arranged in a horizontal direction.
The bottom-up electrospinning device has a configuration in which a spinning solution is injected through a nozzle of an upward nozzle block, and a spinning solution to be injected is deposited on a lower surface of the support to form a nanofiber filter.
According to the above-described configuration, the elongated sheet in which the spinning solution is injected through one of the nozzles of the bottom-up electrospinning device so as to laminate the nanofiber filters is conveyed to the inside of the other unit, The nanofiber filter is manufactured by repeatedly performing the above-described processes such as spraying a spinning solution through a nozzle onto a long sheet to form a laminate of nanofibers.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the scope of the present invention, but is merely an example, and various modifications can be made without departing from the technical spirit of the present invention.
The nanofiber generally means a fiber having an average diameter of 50 to 1000 nm or less and can be manufactured using an electrospinning device.
The electrospinning apparatus includes a power supply, a spinning nozzle, a collector, and the like. The power supply forms an electric field of high voltage between the nozzle and the collector. The spinning nozzle supplies spinning solution to the spinning space. The collector concentrates the electrospun nanofibers. The filaments formed in the spinning space of the electrospinning device may have various average diameters depending on spinning conditions, and may be nanofibers having an average diameter of 50 to 1000 nm.
FIG. 2 is a plan view schematically showing a nozzle body arranged in a nozzle block of a nanofiber filter electrospinning apparatus according to the present invention, and FIG. 3 is a cross-sectional view of a nozzle block arranged in the nozzle block of the nanofiber filter electrospinning apparatus according to the present invention. 4 is a side view schematically showing a nozzle body arranged in a nozzle block of a nanofiber filter electrospinning apparatus according to the present invention, and FIGS. 5 to 6 show a nanofiber filter electrospinning apparatus according to the present invention, FIG. 2 is a plan view schematically showing an operation process in which a polymer spinning solution is electrospun on the same plane of a substrate through a nozzle of each nozzle tube of the spinning device. FIG.
1, the
Here, a low melting point polymer solution for forming an adhesive layer is electrospinned to the low melting
The low melting
(Not shown) for supplying the spinning liquid filled in the spinning liquid
In the low melting point polymer solution, the low melting point polyurethane is a low degree of polymerization polyurethane having a softening temperature of 80-100 ° C.
The low melting point polyester is preferably terephthalic acid, isophthalic acid or a mixture thereof. It is also possible to add ethylene glycol as a diol component to further lower the melting point.
The low melting point polyvinylidene fluoride is a low melting point polyvinylidene fluoride having a weight average molecular weight of 5,000 and a melting point of 80 to 160 ° C.
It is needless to say that the low melting point polyurethane, the low melting point polyester and the low melting point polyvinylidene fluoride may be used singly or in combination of two or more.
In the nanofiber filter electrospinning device 1 as described above, the polymer spinning solution filled in the spinning liquid
At least one or
The
The
Here, the
At this time, a supply amount adjusting means (not shown) is connected to the solution supply pipe 121, which is communicated to the
A
That is, when the polymer spinning solution is supplied to the
For this purpose, the
112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid
The solution supply pipe 121 is connected to the spinning solution
The polymer spinning solution supplied to the
That is, the
Here, the
The supply of the polymer solution to be supplied to each
In an embodiment of the present invention, if the amount of the spinning solution of the polymer spinning solution is easily controlled and controlled after being supplied to the
According to the structure described above, the solution supply pipe 121 and the
In an embodiment of the present invention, the solution supply pipe 121 is provided with a
The MD direction used in the present invention means a machine direction, and means a length direction corresponding to a traveling direction when a fiber such as a film or a nonwoven fabric is continuously produced.
Basis Weight or Grammage is defined as the mass per unit area, that is, the preferred unit, grams per square meter (g / m 2).
An on-off system based on an independent nozzle block can control the basis weight of the polymer solution stacked on the substrate differently. Typically, the basis weight of the nanofiber filter layer can be appropriately selected depending on the application, but the basis weight is in the range of 0.1 to 0.5 g / m 2.
Hereinafter, the polymer used in the present invention will be described. Polymers of the present invention and polyvinylidene fluoride, polyurethane and nylon are preferable for the polymer.
The polymer may be at least one selected from the group consisting of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, or a composite composition thereof, a polyurethane, a polyamide, a polyimide, a polyamideimide, a poly (meta-phenylene isophthalate Amide), meta-aramid, polyethylene chlorotrifluoroethylene, polychlorotrifluoroethylene, polymethylmethacrylate, polyacrylonitrile, polyvinylidene chloride, polyvinylidene chloride-acrylonitrile copolymer, polyacrylic Amide, and the like.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.
The physical property values in the examples were measured by the following methods.
Example 1
Melting
The adhesive layer having a basis weight of 0.1 g / m < 2 > was formed on the cellulose substrate by the electrospinning of the distance between the electrodes and the collector at 40 cm, the application voltage 25 kV, and 70 DEG C in the low melting
Example 2
A polyurethane solution having a weight average molecular weight of 157,000 is dissolved in dimethylformamide (DMF) to prepare a polyurethane solution. The polyurethane solution was put into each of the spinning liquid main tanks and the applied voltage was applied at 20 kV to the nozzle block including the on-off system designed so that the nozzle block was separated into three parts in one direction in the longitudinal direction (MD) 3 g / m < 2 & gt ;. Electrical intermediate portion 1m of the radiation on the collector longitudinal direction (MD) is a polyester having a weight of 0.5 / m 2 polyurethane nanofibers, and the other edge is 50cm with a basis weight of 0.2g / m 2 in the MD width 2m polyurethane nanofiber To form a polyurethane nanofiber filter. At this time, bottom-up electrospinning was performed under the condition that the distance between the electrode and the collector was 40 cm and the temperature was 22 ° C.
Example 3
A polyurethane solution having a weight average molecular weight of 157,000 is dissolved in dimethylformamide (DMF) to prepare a polyurethane solution. The polyurethane solution was injected into the spinning liquid main tank and applied voltage of 20 kV to the nozzle block including the on-off system designed to divide the nozzle block into 9 parts in one direction in the longitudinal direction (MD) g / m < 2 & gt ;. Polyurethane nanofibers having a basis weight of polyurethane nanofiber of 0.2 g / m 2 alternately in the longitudinal direction (MD) on the electrospun cellulose substrate and having a MD width of 2 m, the basis weight of which is 0.5 g / m 2 , To prepare a polyurethane nanofiber filter. At this time, bottom-up electrospinning was performed under the condition that the distance between the electrode and the collector was 40 cm and the temperature was 22 ° C.
100: electrospinning device, 110, 110 ': unit,
111: nozzle block, 111a: nozzle,
112: nozzle body,
112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i:
113: collector, 114: voltage generator,
115: substrate,
115a, 115b and 115c: nanofiber filters,
116a: conveying belt, 116b: conveying roller,
120: spinning liquid main tank, 121: solution supply pipe,
122: supply valve, 125: nozzle supply pipe,
126: Nozzle valve.
a, b, c, d, e, f: different basis weights of nanofibers
Claims (7)
At least one nanofiber layer laminated on the substrate by electrospinning;
And a bonding layer formed between the substrate, the nanofiber layer and the nanofiber layer, the method comprising:
Wherein the nanofiber layer has different basis weights of the nanofibers in the longitudinal direction (MD)
Wherein the adhesive layer is formed by electrospinning a low melting point polymer solution.
Wherein the basis weight of the nanofibers is such that a plurality of nozzle tubes are operated by an on-off system, and the basis weight of the nanofibers is different in the longitudinal direction (MD).
Wherein the on-off system is designed to increase the slope of the basis weight in one direction in the longitudinal direction (MD) in which the nanofibers are integrated, wherein the basis weight of the nanofibers is different in the longitudinal direction (MD).
Wherein the on-off system is designed to increase or decrease the slope of the basis weight in both directions in the longitudinal direction (MD) in which the nanofibers are integrated. The method of manufacturing the nanofiber filter according to claim 1, .
Wherein the on-off system is designed such that the basis weight is alternately different in the longitudinal direction (MD) in which the nanofibers are integrated, wherein the basis weight of the nanofibers is different in the longitudinal direction (MD).
Wherein the basis weight is different in the longitudinal direction (MD) in the range of 0.1 to 0.5 g / m 2 , and the basis weight of the nanofibers is different in the longitudinal direction (MD).
Priority Applications (2)
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KR1020150057481A KR101778255B1 (en) | 2015-04-23 | 2015-04-23 | Nano fiber filter and method of manufacturing the same |
PCT/KR2015/007143 WO2016171329A1 (en) | 2015-04-23 | 2015-07-09 | Electrospinning device comprising temperature adjustment device, method for manufacturing nanofiber filter using same, and nanofiber filter manufactured thereby |
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KR1020150057481A KR101778255B1 (en) | 2015-04-23 | 2015-04-23 | Nano fiber filter and method of manufacturing the same |
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KR20190021061A (en) * | 2017-08-22 | 2019-03-05 | 주식회사 대창 | Fillter including nanofiber, appartus and method manufacturing the same |
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US8267681B2 (en) * | 2009-01-28 | 2012-09-18 | Donaldson Company, Inc. | Method and apparatus for forming a fibrous media |
JP5802021B2 (en) * | 2011-02-15 | 2015-10-28 | トップテック・カンパニー・リミテッドTOPTEC Co., Ltd. | Electrospinning apparatus and nanofiber manufacturing apparatus |
KR101292657B1 (en) * | 2013-02-06 | 2013-08-23 | 톱텍에이치앤에스 주식회사 | A hybrid non-woven separator having the inverted structure |
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