CN111411403B - Electrostatic spinning preparation device of nanofiber filter screen and working method of electrostatic spinning preparation device - Google Patents
Electrostatic spinning preparation device of nanofiber filter screen and working method of electrostatic spinning preparation device Download PDFInfo
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- CN111411403B CN111411403B CN202010141742.1A CN202010141742A CN111411403B CN 111411403 B CN111411403 B CN 111411403B CN 202010141742 A CN202010141742 A CN 202010141742A CN 111411403 B CN111411403 B CN 111411403B
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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
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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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- 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
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
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- 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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- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/04—Filters
Abstract
The invention discloses an electrostatic spinning preparation device of a nanofiber filter screen and a working method thereof, wherein the device comprises an electrostatic spinning needle cylinder; the electrostatic spinning needle cylinder comprises a needle cylinder shell, a rubber ring, a spinning solution channel, a liquid inlet, an injection port and a push rod; the bottom of the syringe shell is provided with an injection port, the inside of the syringe shell is divided into a plurality of accommodating cavities by a plurality of rubber rings, and the rubber rings are arranged along the diameter direction; except the containing cavities communicated with the injection ports, the side walls of the other containing cavities are respectively provided with a liquid inlet for sucking the spinning solution into the electrostatic spinning needle cylinder through the liquid inlets; the center of the rubber ring is provided with a spinning solution channel, and different spinning solutions sequentially enter the needle head through the spinning solution channel in the injection process to be spun; the lower end of the push rod is tightly matched with the inner wall of the syringe shell or is used for being connected with the uppermost rubber ring. The invention can continuously prepare the nanofiber filter screen with a gradient structure or a layered structure.
Description
Technical Field
The invention belongs to the technical field of fine particle filtering materials, and particularly relates to an electrostatic spinning preparation device of a nanofiber filter screen and a working method of the electrostatic spinning preparation device.
Background
With the increasing demand of people on air quality and the gradual improvement of national regulations on pollutant emission control, the particulate matters are used as important emission sources of air pollution, and the control and treatment of the emission of the particulate matters are also increasingly paid more attention. At present, the traditional particulate treatment technologies include means such as gravity settling, electrostatic purification, washing purification, mechanical purification, etc., and the development and application of these technologies are limited due to non-ideal efficiency, high operation cost, complex equipment, etc. The filtering technology is one of the traditional processing technologies, is applied to the ventilation equipment or the end of a pipeline to purify the air, has the characteristics of simple system, low maintenance cost and the like, and can be well suitable for the emission control and the air purification of particulate matters.
The filtering material of the filter screen is the core of the filtering technology. The nanofiber material has a nanometer-scale diameter, according to the partition of a Knudsen number convection field, airflow around the nanofiber is in a sliding or transition region or even a free partition region, the disturbance of the flow field is reduced or even can be ignored, the airflow is closer to the surface of the fiber, the contact probability of particles and the fiber is increased, and the filtering performance is better.
However, there is no apparatus and method capable of continuously manufacturing nanofiber screens in a gradient structure or a layered structure.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides an electrostatic spinning preparation device of a nanofiber filter screen and a working method thereof, which can continuously prepare the nanofiber filter screen with a gradient structure or a layered structure.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
in a first aspect, an electrostatic spinning preparation device for a nanofiber filter screen is provided, which comprises an electrostatic spinning needle cylinder;
the electrostatic spinning needle cylinder comprises a needle cylinder shell, a rubber ring, a spinning solution channel, a liquid inlet, an injection port and a push rod;
the bottom of the needle cylinder shell is provided with an injection port, the inside of the needle cylinder shell is divided into a plurality of accommodating cavities through a plurality of rubber rings, and the rubber rings are arranged along the diameter direction; except the containing cavities communicated with the injection ports, the side walls of the other containing cavities are respectively provided with a liquid inlet for sucking the spinning solution into the electrostatic spinning needle cylinder through the liquid inlets;
the center of the rubber ring is provided with a spinning solution channel, and spinning solutions sequentially enter the needle head through the spinning solution channel in the injection process to be spun;
the lower end of the push rod is tightly matched with the inner wall of the syringe shell or is used for being connected with the uppermost rubber ring.
In some embodiments, the liquid inlet of the electrostatic spinning preparation device for nanofiber filter screens is further provided with a plug.
In some embodiments, the electrostatic spinning preparation device for the nanofiber filter screen further comprises a high-voltage power supply, a needle, a nanofiber collecting plate, a grounding device and a spinning solution;
in a working state, the electrostatic spinning needle cylinder is provided with spinning solutions in layers according to requirements, and a liquid inlet of the electrostatic spinning needle cylinder is blocked by a plug;
the injection port of the electrostatic spinning needle cylinder is connected with a needle head, the needle head is connected with the positive electrode of a high-voltage power supply through a wire, and the high-voltage power supply is connected with the negative electrode of the nanofiber collecting plate through a wire and is connected with a grounding device;
the nanofiber collecting plate is located below the outlet of the needle head and used for collecting spinning fibers coming out of the needle head.
In some embodiments, the electrostatic spinning preparation device for the nanofiber filter screen further comprises a syringe pump, and the spinning solution is injected into the needle by pushing a push rod through the syringe pump.
In some embodiments, the high voltage power supply is used to provide the voltage required for spinning, in the range of 0-30 kV.
In some embodiments, the nanofiber collecting sheet is made of a conductive material, and the collecting form is roller collecting, flat-plate standing collecting or flat-plate rotating collecting.
In some embodiments, the needle is made of stainless steel, and the specification of the needle can be selected from the following ranges: 18G, 20G, 21G, 23G and 25G.
In some embodiments, the injection flow rate of the syringe pump should be adjustable, ranging from 0.01 μ l/min to 40 ml/min.
In a second aspect, a working method of the above electrostatic spinning preparation device for nanofiber filter screens is provided, which includes:
step (1): the spinning solution in the bottommost accommodating cavity of the electrostatic spinning needle cylinder is sucked into the electrostatic spinning needle cylinder through the injection port, and when the sucked spinning solution reaches a certain volume, the solution is stopped to be fed, and the injection port is blocked;
step (2): the spinning solution in the rest accommodating cavity is sequentially sucked into the needle cylinder layer by layer from bottom to top through the liquid inlet on the side surface of the needle cylinder to a certain volume, the liquid inlet on the side surface is opened when the accommodating cavity communicated with the liquid inlet is filled with the liquid, and the spinning solution is in a blocking state in the rest time, and the spinning solution is sucked layer by layer from the bottom of the needle tube;
and (3): after the spinning solution is injected into the electrostatic spinning needle cylinder in a layered manner, the liquid inlet on the side surface is guaranteed to be blocked, the injection port at the bottom of the needle cylinder is opened, and a needle head is connected; after setting spinning voltage and injection flow, starting a spinning process to prepare the nano fibers; in the injection process, the spinning solution sequentially enters the needle head from bottom to top to carry out spinning.
When the fiber filter screen with the gradient structure is prepared, spinning solutions in the containing cavities of the electrostatic spinning needle cylinder are spinning solutions with the same solute and sequentially changed concentration gradients;
when the layered structure fiber filter screen is prepared, the spinning solution in each accommodating cavity of the electrostatic spinning needle cylinder is the spinning solution of different high molecular polymer solutes.
In some embodiments, when a fiber filter screen with a gradient structure and a fiber filter screen with a layered structure are prepared, the rubber ring and the liquid inlet in the electrostatic spinning needle cylinder can be increased or decreased according to gradient parameters and layered requirements required by preparation, so that the structure of the fiber filter screen can be adjusted.
Has the advantages that: according to the electrostatic spinning preparation device and the working method of the nanofiber filter screen, the spinning solution in the spinning injection needle cylinder can be arranged in a layered mode through the specially-made layered electrostatic spinning injection needle cylinder, the concentration and the material of each layer of the spinning solution can be adjusted according to requirements, and the nanofiber filter screen with a gradient structure or a layered structure can be continuously spun and prepared. The nanometer fiber filter screens with different gradient parameters and layering requirements are prepared by adjusting the number of the rubber rings and the liquid inlets in the special electrostatic spinning needle cylinder component, so that the structure of the fiber filter screens is adjusted. The preparation device provided by the invention can be applied to the manufacture of fiber filter screens with different functional requirements, is suitable for the filtration in the fields of oil mist filtration, air purification and oil-water separation, and the prepared gradient structure or layered structure has the characteristics of long service life, high filtration efficiency, low pressure resistance and the like.
The fiber material prepared by the device and the method has the advantages of large specific surface area, small fiber diameter, high porosity, good internal hole connectivity and the like, so that the fiber material is concerned in the field of air filtration and has application in the fields of individual protection, locomotive engine air inlet systems, locomotive passenger industry dust removal and the like.
Drawings
FIG. 1 is a schematic view of an apparatus according to an embodiment;
FIG. 2 is a view showing the construction of an electrostatic spinning cylinder in the embodiment;
in the figure: 1. a high voltage power supply; 2. an electrostatic spinning cylinder; 3. a needle head; 4. a nanofiber collection sheet; 5. a grounding device; 6. spinning solution; 7. an injection pump; 8. an electric wire; 20. a syringe housing; 21. a rubber ring; 22. a spinning solution channel; 23. a liquid inlet; 24. an injection port; 25. a push rod; 61/62/63/64, preparing different spinning solutions as required.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may also include different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 and fig. 2, an electrospinning manufacturing apparatus for nanofiber filter screen with gradient structure or layered structure includes: the device comprises a high-voltage power supply 1, an electrostatic spinning needle cylinder 2, a needle head 3, a nanofiber collecting plate 4, a grounding device 5, a spinning solution 6 and an injection pump 7;
in some embodiments, as shown in fig. 2, the electrospinning syringe 2 includes a push rod 25, a syringe housing 20, a rubber ring 21, a spinning liquid channel 22, a liquid inlet 23, an injection port 24; an injection port 24 is formed at the bottom of the syringe shell 20, the inside of the syringe shell 20 is divided into a plurality of accommodating cavities through a plurality of rubber rings 21, and the rubber rings 21 are arranged along the diameter direction; except for the containing cavities communicated with the injection ports 24, the side wall of each of the other containing cavities is respectively provided with a liquid inlet 23 for sucking the spinning solution into the electrostatic spinning needle cylinder 2 through the liquid inlet 23;
the center of the rubber ring 21 is provided with a spinning solution channel 22, and different spinning solutions sequentially enter a needle head through the spinning solution channel 22 in the injection process to be spun;
the lower end of the push rod 25 is tightly matched with the inner wall of the syringe shell 20 or is used for connecting with the uppermost rubber ring 21.
In some embodiments, the liquid inlet 23 is further provided with a plug.
In a working state, the electrostatic spinning needle cylinder 2 is provided with spinning solutions 6 in layers according to requirements, and a liquid inlet 23 of the electrostatic spinning needle cylinder 2 is blocked by a plug;
the injection port 24 of the electrostatic spinning needle cylinder 2 is connected with a needle head 3, the needle head 3 is connected with the anode of a high-voltage power supply 1 through an electric wire 8, and the high-voltage power supply 1 is connected with the cathode of a nanofiber collecting plate 4 through the electric wire 8 and is connected with a grounding device 5;
the nanofiber collecting plate 4 is positioned below the outlet of the needle 3 and is used for collecting the spinning fibers from the needle 3.
When the fiber filter screen with the gradient structure or the layered structure is prepared, the rubber ring 21 and the liquid inlet 23 can be increased or decreased according to the gradient parameters and the layered requirements of the preparation requirements, so that the structure of the fiber filter screen can be adjusted.
The high-voltage power supply 1 provides voltage required by spinning, the voltage range is 0-30 kV, the positive pole of the power supply is connected with the needle 3 through the wire 8, and the negative pole of the power supply is connected with the nanofiber collecting plate 4 and the grounding device 5 through the wire 8. Different spinning solutions are sequentially injected into the needle 3 by the injection pump 7 and the push rod 25.
The nanofiber collecting plates 4 are preferably made of conductive materials, and can be in the forms of roller collection, flat plate standing collection and flat plate rotating collection. The material of the needle head 3 is preferably stainless steel, and the specification of the needle head can be selected. The injection flow rate of the injection pump 7 is preferably adjustable.
The method for preparing the nanofiber filter screen with the gradient structure or the layered structure by using the device comprises the following steps:
step (1): the spinning solution 64 is sucked into the electrostatic spinning cylinder 2 through the injection port 24, and when the sucked spinning solution reaches a certain volume, the solution is stopped from being fed, and the injection port is blocked;
step (2): the spinning solutions 63, 62 and 61 are sequentially sucked into the needle cylinder layer by layer in a certain volume through the liquid inlet 23 on the side surface of the needle cylinder, the liquid inlet on the side surface is opened when the liquid is fed into the layer, the liquid is in a blocking state in the rest time, and the spinning solutions are sucked upwards layer by layer from the bottom of the needle cylinder;
and (3): after the spinning solution is injected into the needle cylinder in layers, the liquid inlet on the side surface is guaranteed to be blocked, the injection port 24 at the bottom of the needle cylinder is opened, and the needle head 3 is connected; after setting spinning voltage and injection flow, starting a spinning process to prepare the nano fibers; in the process of injection, different spinning solutions 64, 63, 62, 61 pass through the spinning solution channel 22 and the injection port 24 in sequence to enter the needle for spinning.
Example 1:
preparing a fiber filter screen with a gradient structure: preparing spinning solution with the same solute and sequentially changed concentration gradient, wherein the solute is preferably polystyrene, and the average molecular weight is 350000; the solvent is preferably N, N-dimethylformamide or a mixed solvent of N, N-dimethylformamide and tetrahydrofuran; the dope 64, 63, 62, 61 is preferably prepared at a concentration of 5 wt%, 10wt%, 20wt%, 30 wt%. After preparing the spinning solution with concentration gradient, pumping the spinning solution into an electrostatic spinning needle cylinder according to the steps (1) and (2), and carrying out the spinning process in the step (3) to continuously prepare a fiber filter screen with a gradient structure, wherein the fiber diameter of the filter screen is changed from 300 nm to 11.5 mu m in a gradient manner. In addition, the number of the rubber rings 21 and the liquid inlet 23 can be adjusted to prepare the nanofiber filter screens with different gradient parameters.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the claimed invention.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. The electrostatic spinning preparation device of the nanofiber filter screen is characterized by comprising an electrostatic spinning needle cylinder (2);
the electrostatic spinning needle cylinder (2) comprises a needle cylinder shell (20), a rubber ring (21), a spinning solution channel (22), a liquid inlet (23), an injection port (24) and a push rod (25);
an injection port (24) is formed in the bottom of the needle cylinder shell (20), the interior of the needle cylinder shell (20) is divided into a plurality of accommodating cavities through a plurality of rubber rings (21), and the rubber rings (21) are arranged along the diameter direction of the needle cylinder shell; except for the containing cavities communicated with the injection ports (24), the side wall of each of the other containing cavities is respectively provided with a liquid inlet (23) for sucking the spinning solution into the electrostatic spinning needle cylinder (2) through the liquid inlet (23);
a spinning solution channel (22) is formed in the center of the rubber ring (21) and is used for enabling spinning solutions to sequentially enter the needle head through the spinning solution channel (22) in the injection process to carry out spinning;
the lower end of the push rod (25) is tightly matched with the inner wall of the syringe shell (20) or is used for being connected with the uppermost rubber ring (21).
2. The electrostatic spinning preparation device for the nanofiber filter screen as claimed in claim 1, wherein the liquid inlet (23) is further provided with a plug.
3. The electrostatic spinning preparation device of the nanofiber filter screen according to claim 2, further comprising a high voltage power supply (1), a needle (3), a nanofiber collecting plate (4), a grounding device (5) and a spinning solution (6);
in a working state, the electrostatic spinning needle cylinder (2) is provided with spinning solutions (6) in a layered mode according to requirements, and a liquid inlet (23) of the electrostatic spinning needle cylinder (2) is blocked by a plug;
an injection port (24) of the electrostatic spinning needle cylinder (2) is connected with a needle head (3), the needle head (3) is connected with the positive electrode of a high-voltage power supply (1) through a first wire, the negative electrode of the high-voltage power supply (1) is connected with a nanofiber collecting plate (4) through a second wire, and the nanofiber collecting plate (4) is connected with a grounding device (5);
the nanofiber collecting plate (4) is located below the outlet of the needle head (3) and is used for collecting spinning fibers coming out of the needle head (3).
4. The electrospinning manufacturing apparatus of nanofiber filter screen according to claim 3, further comprising a syringe pump (7), wherein the spinning solution (6) is injected into the needle (3) by pushing the push rod (25) through the syringe pump (7).
5. The electrostatic spinning preparation device of the nanofiber filter screen as claimed in claim 3, wherein the high voltage power supply (1) is used for providing the voltage required for spinning, and the voltage range is 0-30 kV;
and/or the nanofiber collecting plate (4) is made of conductive materials, and the collecting mode is roller collecting, flat plate standing collecting or flat plate rotating collecting.
6. The electrostatic spinning preparation device of the nanofiber filter screen as claimed in claim 3, wherein the needle (3) is made of stainless steel, and the specification of the needle can be selected from the following ranges: 18G, 20G, 21G, 23G and 25G.
7. The electrostatic spinning preparation device of the nanofiber screen as claimed in claim 4, wherein the injection flow rate of the injection pump (7) is adjustable and is adjusted from 0.01 μ l/min to 40 ml/min.
8. The method for operating the device for preparing nanofiber filter screen according to any one of claims 1 to 7, comprising:
step (1): the spinning solution in the bottommost accommodating cavity of the electrostatic spinning needle cylinder (2) is sucked into the electrostatic spinning needle cylinder (2) through an injection port (24), and when the sucked spinning solution reaches a certain volume, the liquid is stopped from being fed, and the injection port is blocked;
step (2): the spinning solution in the rest accommodating cavity is sequentially sucked into the needle cylinder layer by layer from bottom to top through a liquid inlet (23) on the side surface of the needle cylinder to a certain volume, the liquid inlet on the side surface is opened when the accommodating cavity communicated with the liquid inlet is filled with the spinning solution, and the spinning solution is in a blocking state in the rest time, and the spinning solution is sucked layer by layer from the bottom of the needle cylinder;
and (3): after the spinning solution is injected into the electrostatic spinning needle cylinder (2) in a layered manner, the liquid inlet on the side surface is guaranteed to be blocked, an injection port (24) at the bottom of the needle cylinder is opened, and a needle head (3) is connected; after setting spinning voltage and injection flow, starting a spinning process to prepare the nano fibers; in the injection process, the spinning solution sequentially enters the needle head from bottom to top to carry out spinning.
9. The operating method according to claim 8,
when the fiber filter screen with the gradient structure is prepared, the spinning solution in each accommodating cavity of the electrostatic spinning needle cylinder (2) is the spinning solution with the same solute and sequentially changed concentration gradient;
or when the layered structure fiber filter screen is prepared, the spinning solution in each accommodating cavity of the electrostatic spinning needle cylinder (2) is the spinning solution of different high molecular polymer solutes.
10. The working method of claim 8, wherein when preparing the fiber filter screen with the gradient structure and the fiber filter screen with the layered structure, the rubber ring (21) and the liquid inlet (23) in the electrostatic spinning needle cylinder (2) can be increased or decreased according to the gradient parameters and the layered requirements required by preparation, so as to realize the adjustment of the structure of the fiber filter screen.
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| CN202010141742.1A CN111411403B (en) | 2020-03-04 | 2020-03-04 | Electrostatic spinning preparation device of nanofiber filter screen and working method of electrostatic spinning preparation device |
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| KR100594537B1 (en) * | 2002-01-18 | 2006-07-03 | 산요덴키가부시키가이샤 | Method of Producing Organic-Inorganic Composite Material and Organic-Inorganic Composite Material |
| WO2005042813A1 (en) * | 2003-10-30 | 2005-05-12 | Clean Air Technology Corp. | Electrostatic spinning equipment and method of preparing nano fiber using the same |
| KR20110080910A (en) * | 2010-01-07 | 2011-07-13 | 서울대학교산학협력단 | Manufacturing method of metal oxide nanotubes for detecting gases and metal oxide gas sensor using the same |
| CN102505403B (en) * | 2011-09-29 | 2014-04-02 | 大连理工大学 | Method for preparing hierarchically porous activated carbon fiber membrane |
| CN103225178B (en) * | 2013-04-26 | 2015-03-11 | 天津大学 | Fiber/microsphere composite film containing graded-distribution bioactive substances and preparation method thereof |
| CN104393337B (en) * | 2014-12-10 | 2017-02-22 | 天津力神电池股份有限公司 | Lithium ion battery gel electrolyte with multi-stage structure and preparation method thereof |
| KR20170077658A (en) * | 2015-12-28 | 2017-07-06 | (주)제노랩 | soft nano mask pack using complex nano fiber sheet and the method for preparing thereof |
| CN105617458B (en) * | 2016-01-12 | 2018-07-10 | 中国人民解放军第四军医大学 | A kind of nerve trachea preparation method of two-way gradient vascular endothelial growth factor |
| CN105970483A (en) * | 2016-05-23 | 2016-09-28 | 苏州纳赛博丝新材料科技有限公司 | Electrostatic spinning directional nanofiber membrane and preparation method and application thereof |
| CN107510862B (en) * | 2016-06-15 | 2020-05-19 | 中国科学院苏州纳米技术与纳米仿生研究所 | Ordered fiber scaffold carrying bioactive molecules with gradient concentration, preparation method and application |
| CN106801261B (en) * | 2017-01-06 | 2019-05-24 | 上海理工大学 | A kind of electro spinning nano fiber and preparation method thereof with drug gradient distribution |
| CN109130441B (en) * | 2018-08-03 | 2020-12-25 | 河南工程学院 | Controllable preparation method of gradient HDPE electromagnetic shielding film with multilayer structure |
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