CN114855369A - Preparation device and preparation method of multi-scale fluffy fiber membrane - Google Patents
Preparation device and preparation method of multi-scale fluffy fiber membrane Download PDFInfo
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- CN114855369A CN114855369A CN202210606911.3A CN202210606911A CN114855369A CN 114855369 A CN114855369 A CN 114855369A CN 202210606911 A CN202210606911 A CN 202210606911A CN 114855369 A CN114855369 A CN 114855369A
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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
- 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
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
- D01D5/0038—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion the fibre formed by solvent evaporation, i.e. dry electro-spinning
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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
- 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
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
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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
- D04H1/40—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
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a preparation device and a preparation method of a multi-scale fluffy fiber membrane, the preparation device of the multi-scale fluffy fiber membrane comprises a fiber deposition component and a spinning jet component, the fiber deposition component comprises a first fiber deposition shell and a second fiber deposition shell which are symmetrically arranged and are in a hemispherical shell shape, a first rotary driving motor and a second rotary driving motor which drive the first fiber deposition shell and the second fiber deposition shell to longitudinally rotate are respectively and correspondingly arranged on the first fiber deposition shell and the second fiber deposition shell, the spinning jet component comprises a liquid pump of which the liquid outlet end is connected with the liquid inlet end of a spinning nozzle and a solution tank of which the liquid outlet end is connected with the liquid inlet end of the liquid pump, the preparation device and the preparation method of the multi-scale fluffy fiber membrane collect fiber jet on the outer surface of the two fiber deposition devices by utilizing different rotating speeds and different electric field distributions of the two fiber deposition devices, thereby generating the fluffy multi-scale nano-fiber, and having simple preparation process and low production cost.
Description
Technical Field
The invention relates to the technical field of fiber membranes, in particular to a device and a method for preparing a multi-scale fluffy fiber membrane.
Background
Electrostatic spinning, i.e. a polymer spray electrostatic stretch spinning technology, also called as electrospinning, adds high-voltage static electricity on a polymer solution or a melt convex tip, so that charged polymer droplets overcome the external tension of the droplets under high electric field intensity and are ejected in a jet flow form. In the process of spraying, the solvent is volatilized and solidified, and finally falls on the collector to form a non-woven fabric-shaped fiber felt, namely a nano polymer fiber membrane.
The fluffy multi-scale nanofiber has the advantages of large specific surface area, easiness in dispersion, good filtering property, good toughness and processing property, and great application prospect in the fields of filtration, catalysis, medicine and the like, but the fluffy nanofiber is prepared by carrying out processes of stretching, heat setting and the like on a conventional fiber membrane for many times, and is long in time consumption, high in energy consumption, low in production efficiency and poor in fluffy degree.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or problems associated with the prior art fluffy multi-scale nanofiber preparation.
Therefore, the invention aims to provide a device and a method for preparing a multi-scale fluffy fiber membrane, wherein fiber jet flow is collected on the outer surface of a fiber depositor by utilizing the rotation of the fiber depositor, and the evaporation speed of the surface of the fiber is accelerated, so that the fluffy multi-scale nano fiber is generated, the preparation process is simple, and the production cost is low.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
a device for preparing a multi-scale fluffy fiber membrane, comprising:
the fiber deposition assembly comprises a first fiber deposition shell and a second fiber deposition shell which are symmetrically arranged and are in a hemispherical shell shape, wherein a first rotary driving motor and a second rotary driving motor which drive the first fiber deposition shell and the second fiber deposition shell to longitudinally rotate are respectively and correspondingly arranged on the first fiber deposition shell and the second fiber deposition shell, the first fiber deposition shell is electrically connected with a second high-voltage power supply, and the second fiber deposition shell is electrically connected with a third high-voltage power supply;
the spinning jet assembly comprises a liquid pump, a solution tank and a first high-voltage power supply, wherein the liquid outlet end of the spinning spray head is positioned right above the axial centers of the first fiber deposition shell and the second fiber deposition shell, the liquid pump is connected with the liquid inlet end of the spinning spray head, the solution tank is connected with the liquid inlet end of the liquid pump, and the first high-voltage power supply is electrically connected with the spinning spray head.
The preferable scheme of the preparation device of the multi-scale fluffy fiber membrane is that the axis of the spinning nozzle coincides with the symmetry axes of the first fiber deposition shell and the second fiber deposition shell, and the distance from the bottom of the spinning nozzle to the center of the symmetry axes of the first fiber deposition shell and the second fiber deposition shell is 0-15 cm.
The preferable scheme of the preparation device for the multi-scale fluffy fiber membrane is that the spinning nozzle is a dispensing flat needle head, the lower half part of the dispensing flat needle head is radially provided with a plurality of jet hole groups along the circumferential outer wall, and each jet hole group is provided with a plurality of jet holes along the axial side wall.
As a preferable scheme of the preparation device of the multi-scale fluffy fiber membrane, the aperture of the jet hole is 5-10 μm.
As a preferable scheme of the preparation device of the multi-scale fluffy fiber membrane, the flow range of the liquid pump is 10 mu l/hr-100 ml/hr.
As a preferable scheme of the preparation device of the multi-scale fluffy fiber membrane, the rotation range of the first rotary driving motor and the second rotary driving motor is 30 RPM-300 RPM.
As a preferable scheme of the preparation device of the multi-scale fluffy fiber membrane, the inner diameter and the outer diameter of the first fiber deposition shell and the second fiber deposition shell are both 5-20 cm.
As a preferable scheme of the preparation device of the multi-scale fluffy fiber membrane, the inner diameter of the spinning nozzle ranges from 50 micrometers to 1500 micrometers.
A preparation method of a multi-scale fluffy fiber membrane comprises the following specific steps:
s1, transferring a PEO solution serving as a spinning solution, wherein a solute is PEO, a solvent is alcohol and distilled water, and the solution is transferred into a spinning solution box, wherein the volume ratio of the alcohol to the distilled water is 1:1, and the concentration of the solution is 12%;
s2, installing a spinning nozzle right above the symmetry axes of the first fiber deposition shell and the second fiber deposition shell, enabling the axis of the spinning nozzle to coincide with the symmetry axes of the first fiber deposition shell and the second fiber deposition shell, and enabling the distance between the bottom of the spinning nozzle and the symmetry centers of the first fiber deposition shell and the second fiber deposition shell to be 2 cm;
s3, starting the liquid pump, setting the flow of the liquid pump to be 100 mu l/hr, and enabling stable spinning solution drops to continuously appear at the jet hole of the spinning nozzle;
s4, starting a first high-voltage power supply, a second high-voltage power supply and a third high-voltage power supply, setting the positive voltage output value of the first high-voltage power supply and the second high-voltage power supply to be +20kV, setting the negative voltage output value of the third high-voltage power supply to be-12 kV, enabling the first high-voltage power supply to output high-voltage static electricity to a spinning nozzle, enabling the second high-voltage power supply to output high-voltage static electricity to a first fiber deposition shell, enabling the third high-voltage power supply to output high-voltage static electricity to a second fiber deposition shell, enabling a high-voltage electrostatic field to be generated between the spinning nozzle and the first fiber deposition shell, enabling fibers sprayed from the spinning nozzle to be deposited to the second fiber deposition shell or the first fiber deposition shell under the combined action of the two high-voltage electrostatic fields;
s5, starting the first rotary driving motor and the second rotary driving motor, and setting the rotating speeds of the first rotary driving motor and the second rotary driving motor to be 50PRM and 30RPM respectively, so that the first fiber deposition shell and the second fiber deposition shell rotate at different rotating speeds;
s6, the spinning solution is ejected from the jet hole of the spinning nozzle, and generates electro-hydraulic coupling action after entering a high-voltage electrostatic field, and is stretched and solidified into a multi-scale fluffy fiber membrane by the electric field force in the ejection process of the first fiber deposition shell and the second fiber deposition shell, and when the first fiber deposition shell and the second fiber deposition shell rotate, the fibers firstly deposited on the outer surfaces of the first fiber deposition shell and the second fiber deposition shell are rotationally drawn by the first fiber deposition shell and the second fiber deposition shell, and simultaneously the second fiber deposition shell and the first fiber deposition shell are drawn at different rotating speeds, so that the fibers are subjected to different drawing forces on the two fiber deposition devices to generate fluffy effect;
and S7, stopping the devices after the fibers with proper thickness are deposited on the first fiber deposition shell and the second fiber deposition shell, lightly touching the fibers by using a grounding conductor to remove residual charges, and taking out the fibers deposited on the first fiber deposition shell and the second fiber deposition shell to obtain the required fiber films.
Compared with the prior art, the invention has the beneficial effects that: the rotation of the fiber depositor consisting of the first fiber depositing shell and the second fiber depositing shell and the potential difference of the fiber depositor lead the volatilization speed of the solvent of the jet flow falling on the surface of the fiber depositor to be increased, thus leading the fiber to be in a fluffy state and in multiple scales. After the process, finally, the fluffy multi-scale nano-fiber with the fiber diameter of 50 nm-10 mu m is formed on the surface of the fiber precipitator, the porosity range is 60% -80%, and the specific surface area can reach 1600m at most 2 Per g, pore volume up to 2.26cm 3 (ii) in terms of/g. The preparation process is simple and the production cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a device for preparing a multi-scale fluffy fiber membrane according to the invention;
FIG. 2 is a schematic diagram of a spinning nozzle of the apparatus for preparing a multi-scale fluffy fiber membrane according to the present invention;
fig. 3 is a schematic diagram of the deposition principle of the preparation device of the multi-scale fluffy fiber membrane.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Next, the present invention will be described in detail with reference to the drawings, wherein for convenience of illustration, the cross-sectional view of the device structure is not enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a preparation device and a preparation method of a multi-scale fluffy fiber membrane.
Fig. 1 to 3 are schematic diagrams illustrating the structure and principle of a multi-scale fluffy fiber membrane manufacturing device according to the present invention, and referring to fig. 1 to 3, the main body of the multi-scale fluffy fiber membrane manufacturing device according to the present embodiment comprises a fiber deposition assembly 100 and a spinning jet assembly 200.
The fiber deposition assembly 100 is used for depositing and forming a fiber film, and specifically, the fiber deposition assembly 100 includes a first fiber deposition shell 110 and a second fiber deposition shell 120 which are symmetrically arranged and have a hemispherical shell shape, the first fiber deposition shell 110 and the second fiber deposition shell 120 form a fiber depositor, a first rotary driving motor 130 and a second rotary driving motor 140 which drive the first fiber deposition shell 110 and the second fiber deposition shell 120 to rotate longitudinally are respectively and correspondingly arranged on the first fiber deposition shell 110 and the second fiber deposition shell 120, the first fiber deposition shell 110 is electrically connected with a second high-voltage power supply 150, the second fiber deposition shell 120 is electrically connected with a third high-voltage power supply 160, when in use, the first rotary driving motor 130 and the second rotary driving motor 140 drive the fiber depositor formed by the first fiber deposition shell 110 and the second fiber deposition shell 120 to rotate, the fiber which is firstly deposited on the outer surface of the depositor is drawn by the rotation of the depositor, the fiber is deposited on the outer surface of the fiber depositor in the form shown in figure 3, the arrangement is regular, the space occupied by the fiber is reduced, more fibers are collected, the fibers can be further refined and stretched due to the rotation of the fiber depositor, the efficiency of a spinning solution is effectively improved, the fibers fall on the outer surface of the fiber depositor, the shape of the fibers can be changed due to the rotation of the fiber depositor, the arrangement is compact, and nano fibers with different thickness diameters are formed. The fluffy multi-scale nanofiber membrane is obtained on the surface of the fiber precipitator through the process, the fibers are compactly and regularly connected, and the fluffy multi-scale nanofiber membrane has higher toughness,
preferably, in the present embodiment, the axis of the spinneret 210 coincides with the symmetry axis of the first fiber deposition shell 110 and the second fiber deposition shell 120, the distance from the bottom of the spinneret 210 to the center of the symmetry axis of the first fiber deposition shell 110 and the second fiber deposition shell 120 is 0cm to 15cm, the rotation range of the first rotary driving motor 130 and the second rotary driving motor 140 is 30RPM to 300RPM, and the inner diameter and the outer diameter of the first fiber deposition shell 110 and the second fiber deposition shell 120 are both 5 to 20 cm.
The spinning jet assembly 200 is used for jetting a spinning solution to the fiber deposition assembly 100, and specifically, the spinning jet assembly 200 includes a liquid pump 220 located right above the axial centers of the first fiber deposition shell 110 and the second fiber deposition shell 120, the liquid outlet end of a spinning nozzle 210 being connected to the liquid inlet end of the spinning nozzle 210, a solution tank 230 having a liquid outlet end being connected to the liquid inlet end of the liquid pump 220, and a first high voltage power supply 240 electrically connected to the spinning nozzle 210, when in use, the liquid pump 220 pumps the solution in the solution tank 230 and continuously conveys the solution into the spinning nozzle 210, and then the solution is jetted from the spinning nozzle 210, in this embodiment, the spinning nozzle 210 is a dispensing flat-mouth needle, and the lower half part of the dispensing flat-mouth needle is radially provided with a plurality of jet hole sets along the circumferential outer wall, and each jet hole set has a plurality of jet holes 210a along the axial side wall, the number of the jet hole groups is 6, each jet hole group is provided with 12 jet holes 210a along the axial side wall, the aperture of each jet hole 210a is 5 mu m-10 mu m, the flow range of the body pump 220 is 10 mu l/hr-100 ml/hr, and the inner diameter range of the spinning nozzle 210 is 50 mu m-1500 mu m.
In order to describe the use method of the preparation device of the multi-scale fluffy fiber membrane in detail, the invention also provides a preparation method of the multi-scale fluffy fiber membrane, which comprises the following specific steps:
s1, transferring the solution into a spinning solution box by using a PEO solution as a spinning solution, wherein the solute is PEO, the solvent is alcohol and distilled water, the volume ratio of the alcohol to the distilled water is 1:1, and the solution concentration is 12%.
S2, installing the spinneret 210 directly above the symmetry axes of the first fiber deposition shell 110 and the second fiber deposition shell 120, making the axis of the spinneret 210 coincide with the symmetry axes of the first fiber deposition shell 110 and the second fiber deposition shell 120, and making the bottom of the spinneret 210 2cm away from the symmetry centers of the first fiber deposition shell 110 and the second fiber deposition shell 120;
s3, starting the liquid pump 220, setting the flow rate of the liquid pump 220 to be 100 mu l/hr, and continuously generating stable spinning solution liquid drops at the jet hole 210a of the spinning nozzle 210;
s4, turning on the first high voltage power supply 240, the second high voltage power supply 150 and the third high voltage power supply 160, setting the positive voltage output value of the first high voltage power supply 240 and the second high voltage power supply 150 to +20kV, setting the negative voltage output value of the third high voltage power supply 160 to-12 kV, at this time, the first high voltage power supply 240 outputs high voltage static electricity to the spinning nozzle 210, the second high voltage power supply 150 outputs high voltage static electricity to the first fiber deposition shell 110, the third high voltage power supply 160 outputs high voltage static electricity to the second fiber deposition shell 120, a high voltage electrostatic field is generated between the spinning nozzle 210 and the first fiber deposition shell 110, a high voltage electrostatic field is generated between the spinning nozzle 210 and the second fiber deposition shell 120, and the fiber sprayed from the spinning nozzle 210 is deposited to the second fiber deposition shell 120 or the first fiber deposition shell 110 under the combined action of the two high voltage electrostatic fields;
s5, turning on the first rotary drive motor 130 and the second rotary drive motor 140, and setting the rotational speeds of the first rotary drive motor 130 and the second rotary drive motor 140 to 50PRM and 30RPM, respectively, so that the first fiber deposition shell 110 and the second fiber deposition shell 120 rotate at different rotational speeds,
s6, the spinning solution is ejected from the ejection hole 210a of the spinning nozzle 210, and generates an electro-hydraulic coupling effect after entering a high-voltage electrostatic field, and is stretched and solidified by an electric field force to form a multi-scale fluffy fiber membrane in the ejection process of the first fiber deposition shell 110 and the second fiber deposition shell 120, and when the first fiber deposition shell 110 and the second fiber deposition shell 120 rotate, the fibers firstly deposited on the outer surfaces of the first fiber deposition shell 110 and the second fiber deposition shell 120 are drawn by the rotation of the first fiber deposition shell 110 and the second fiber deposition shell 120, and simultaneously, the second fiber deposition shell 120 and the first fiber deposition shell 110 are drawn at different rotation speeds, so that the fibers are drawn by different drawing forces on the two fiber deposition devices to generate a fluffy effect;
s7, after depositing fibers with proper thickness on the first fiber deposition shell 110 and the second fiber deposition shell 120, stopping each device, touching the fibers with a grounding conductor to remove residual charges, and taking out the fibers deposited on the first fiber deposition shell 110 and the second fiber deposition shell 120 to obtain the required fiber membrane.
The rotation of the fiber depositor consisting of the first fiber deposition shell 110 and the second fiber deposition shell 120 and the potential difference of the fiber depositor of the present invention act to increase the volatilization speed of the solvent of the jet flow falling on the surface of the fiber depositor, so that the fiber presents a fluffy state and multiple scales. After the process, finally, the fluffy multi-scale nano-fiber with the fiber diameter of 50 nm-10 mu m is formed on the surface of the fiber precipitator, the porosity ranges from 60% to 80%, and the specific surface area can be up to the maximumUp to 1600m 2 Per g, pore volume up to 2.26cm 3 (ii) in terms of/g. The preparation process is simple and the production cost is low.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. A preparation facilities of fluffy attitude fibre membrane of multiscale characterized by, includes:
the fiber deposition assembly (100) comprises a first fiber deposition shell (110) and a second fiber deposition shell (120) which are symmetrically arranged and are in a hemispherical shell shape, wherein the first fiber deposition shell (110) and the second fiber deposition shell (120) are respectively and correspondingly provided with a first rotary driving motor (130) and a second rotary driving motor (140) which drive the first fiber deposition shell and the second fiber deposition shell to longitudinally rotate, the first fiber deposition shell (110) is electrically connected with a second high-voltage power supply (150), and the second fiber deposition shell (120) is electrically connected with a third high-voltage power supply (160);
the spinning jet assembly (200) comprises a liquid pump (220) which is positioned right above the axial centers of the first fiber deposition shell (110) and the second fiber deposition shell (120) and is connected with the liquid outlet end of a spinning nozzle (210), a solution tank (230) which is connected with the liquid inlet end of the liquid pump (220) and is connected with the liquid outlet end of the spinning nozzle (210), and a first high-voltage power supply (240) which is electrically connected with the spinning nozzle (210).
2. The device for preparing the multi-scale fluffy fiber membrane according to the claim 1, wherein the axis of the spinning nozzle (210) is coincident with the symmetry axis of the first fiber deposition shell (110) and the second fiber deposition shell (120), and the bottom of the spinning nozzle (210) is 0 cm-15 cm away from the center of the symmetry axis of the first fiber deposition shell (110) and the second fiber deposition shell (120).
3. The device for preparing the multi-scale fluffy fiber membrane according to the claim 1, wherein the spinning nozzle (210) is a dispensing flat needle, and the lower half part of the dispensing flat needle is radially provided with a plurality of jet hole groups along the circumferential outer wall, and each jet hole group is provided with a plurality of jet holes (210 a) along the axial side wall.
4. The device for preparing the multi-scale fluffy fiber membrane according to the claim 3, wherein the aperture diameter of the jet hole (210 a) is 5-10 μm.
5. The apparatus for preparing the multi-scale fluffy fiber membrane according to the claim 1, wherein the flow rate of the liquid pump (220) is in the range of 10 μ l/hr to 100 ml/hr.
6. The apparatus for preparing a multi-scale fluffy fiber membrane according to claim 1, wherein the first rotary driving motor (130) and the second rotary driving motor (140) rotate in a range of 30RPM to 300 RPM.
7. The device for preparing the multi-scale fluffy fiber membrane according to the claim 1, wherein the inner diameter and the outer diameter of the first fiber deposition shell (110) and the second fiber deposition shell (120) are both 5-20 cm.
8. The device for preparing the multi-scale fluffy fiber membrane according to the claim 1, wherein the inner diameter of the spinning nozzle (210) ranges from 50 μm to 1500 μm.
9. A method for preparing a multi-scale fluffy fiber membrane of a multi-scale fluffy fiber membrane preparation device according to any one of claims 1-8, which comprises the following steps:
s1, transferring a PEO solution serving as a spinning solution, wherein a solute is PEO, a solvent is alcohol and distilled water, the solution is transferred into a spinning solution box, the volume ratio of the alcohol to the distilled water is 1:1, and the concentration of the solution is 12%;
s2, installing the spinning nozzle (210) right above the symmetry axes of the first fiber deposition shell (110) and the second fiber deposition shell (120), enabling the axis of the spinning nozzle (210) to coincide with the symmetry axes of the first fiber deposition shell (110) and the second fiber deposition shell (120), and enabling the bottom of the spinning nozzle (210) to be 2cm away from the symmetry centers of the first fiber deposition shell (110) and the second fiber deposition shell (120);
s3, starting the liquid pump (220), setting the flow rate of the liquid pump (220) to be 100 mu l/hr, and continuously generating stable spinning solution drops at the jet hole (210 a) of the spinning nozzle (210);
s4, turning on the first high voltage power supply (240), the second high voltage power supply (150) and the third high voltage power supply (160), setting the positive voltage output value of a first high-voltage power supply (240) and the positive voltage output value of a second high-voltage power supply (150) to be +20kV, setting the negative voltage output value of a third high-voltage power supply (160) to be-12 kV, wherein the first high-voltage power supply (240) outputs high-voltage static electricity to a spinning nozzle (210), the second high-voltage power supply (150) outputs high-voltage static electricity to a first fiber deposition shell (110), the third high-voltage power supply (160) outputs high-voltage static electricity to a second fiber deposition shell (120), a high-voltage electrostatic field is generated between the spinning nozzle (210) and the first fiber deposition shell (110), a high-voltage electrostatic field is generated between the spinning nozzle (210) and the second fiber deposition shell (120), and fibers sprayed from the spinning nozzle (210) can be deposited to the second fiber deposition shell (120) or the first fiber deposition shell (110) under the combined action of the two high-voltage electrostatic fields;
s5, turning on the first rotary drive motor (130) and the second rotary drive motor (140), and setting the rotation speeds of the first rotary drive motor (130) and the second rotary drive motor (140) to 50PRM and 30RPM, respectively, such that the first fiber deposition shell (110) and the second fiber deposition shell (120) rotate at different rotation speeds;
s6, the spinning solution is ejected from an ejection hole (210 a) of a spinning nozzle (210), and generates an electro-hydraulic coupling effect after entering a high-voltage electrostatic field, the spinning solution is stretched and solidified into a multi-scale fluffy state fiber membrane by an electric field force in the ejection process of the first fiber deposition shell (110) and the second fiber deposition shell (120), and when the first fiber deposition shell (110) and the second fiber deposition shell (120) rotate, fibers firstly deposited on the outer surfaces of the first fiber deposition shell (110) and the second fiber deposition shell (120) are subjected to the rotary traction of the first fiber deposition shell (110) and the second fiber deposition shell (120), and simultaneously, the second fiber deposition shell (120) and the first fiber deposition shell (110) are subjected to different traction effects at different rotation speeds, so that the fibers are subjected to different traction forces on the two fiber deposition devices to generate a fluffy effect;
and S7, when fibers with proper thickness are deposited on the first fiber deposition shell (110) and the second fiber deposition shell (120), stopping the devices, using a grounding conductor to lightly touch the fibers to remove residual charges, and taking out the fibers deposited on the first fiber deposition shell (110) and the second fiber deposition shell (120) to obtain the required fiber membranes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606911.3A CN114855369B (en) | 2022-05-31 | 2022-05-31 | Preparation device and preparation method of multi-scale fluffy fibrous membrane |
Applications Claiming Priority (1)
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| CN114855369B (en) | 2023-07-18 |
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