CN110284205B - Smearing type circulating liquid supply device and using method - Google Patents
Smearing type circulating liquid supply device and using method Download PDFInfo
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- CN110284205B CN110284205B CN201910592621.6A CN201910592621A CN110284205B CN 110284205 B CN110284205 B CN 110284205B CN 201910592621 A CN201910592621 A CN 201910592621A CN 110284205 B CN110284205 B CN 110284205B
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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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- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
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Abstract
The invention relates to a smearing type circulating liquid supply device and a using method thereof. The invention adopts the smearing type circulating liquid supply, avoids the problem that a needle head type spray head is easy to block, is different from a free liquid level liquid supply mode, smears a thin layer of solution for spinning each time, recycles the rest solution to the liquid storage tank, realizes circulating liquid supply, reduces the waste of the solution, does not expose the rest solution in the air, reduces volatilization, ensures the consistency of the rest solution, reduces environmental pollution, ensures that the solution on the spray head is not easy to solidify, and forms a nanofiber membrane with more stable quality.
Description
Technical Field
The invention relates to the technical field of electrostatic spinning, in particular to a coating type circulating liquid supply device and a using method thereof.
Background
Electrostatic spinning is the most common technology for spinning nano-fibers at present, and products of the electrostatic spinning have very excellent performance, such as extremely large specific surface area, flexible surface functional finishing, excellent mechanical behavior and the like, and can be applied to tissue engineering, wound dressings, drug release, filter materials, composite reinforced materials, sensors and the like. Because the electrostatic spinning process is simple, the preparation flow is shorter than that of the traditional conventional spinning, the product function is excellent, and the electrostatic spinning is a long-standing struggle target for fiber scientists and textile developers since the acquisition of U.S. patents in 1934 by Anton formhals. The nano-fiber becomes the leading product of the new century in China. Has huge market potential and very broad prospect.
The traditional single-needle electrostatic spinning device consists of a high-voltage power supply system, a liquid supply system and a collection system. The liquid supply system comprises a syringe pump, a medical needle tube and a hollow metal needle head, and materials needing spinning are firstly dissolved in a proper solvent and added into the needle tube connected with the hollow metal needle head. Applying high voltage on the metal needle and grounding the receiving device, thereby forming a high voltage electric field between the metal needle and the receiving device. The electric field force of the high-voltage electric field to the liquid drop is opposite to the action direction of the liquid surface tension, and an outward force is generated on the surface of the liquid drop, so that the liquid drop of the ejection opening is gradually changed into a cone (Taylor cone) from a hemisphere. When the electric field is gradually increased enough to overcome the surface tension, viscous forces, etc. of the solution, the jet is ejected from the surface of the droplet, undergoes whip movement and then solidifies to form nanofibers, which are deposited on a collection device.
However, the yield of the nanofibers obtained by the single-needle electrostatic spinning device is very low, the requirement of industrial application of the nanofibers is difficult to meet, and the blockage is easy to occur, so that the continuous spinning is not facilitated. The device that was the earliest to realize commercialization of mass production of electrospun nanofibers was the Nanospider electrospinning device developed by Elmarco corporation, by czech liberez university of industry, followed by prior art disclosures:
patent CN 104862788A discloses an air-jet assisted multi-needle electrostatic spinning device and a method for preparing a nanofiber web by using the same, which can improve the yield of nanofibers, but because needles are used, the disadvantages that needles are easily blocked and the needles are easily interfered with each other exist, the distribution of nanofibers is easily uneven, and the influence factors of the arrangement mode of the needles are complex.
Patent CN205856663U discloses a porous type toper electrostatic spinning shower nozzle device, opens on toper shower nozzle surface has a plurality of holes, and the problem of syringe needle jam has been reduced in arranging of a plurality of syringe needles, but solution supplies liquid control comparatively complicated and the distance between the efflux is nearer, and the efflux of outer lane will be repelled by the inner circle, and the fibre distributes unevenly and concentrates inadequately.
Patent CN 102660783 a discloses a porous bubble electrostatic spinning device, which forms bubble generation jet flow at the free liquid surface of high polymer by introducing air at the bottom of a liquid tank, and improves the yield of nano fibers by the method, but the formation and the breakage of the bubbles are random and unstable, so the spinning jet flow of the device is easy to be unstable in the spinning process, and simultaneously, the contact range of the free liquid surface of high polymer and air is large, and the solvent is volatile.
Patent ZL201310032194.9 discloses an umbrella-shaped electrostatic spinning nozzle and an electrostatic spinning method, which can realize the mass preparation of nanofibers, but the biggest disadvantage is that the solution free surface of the umbrella-shaped nozzle is in contact with the atmospheric environment, and the solvent is very volatile, thereby affecting the quality of the nanofibers.
Therefore, how to solve the problem of nozzle blockage by the current nozzle for preparing nano fibers in batches is the biggest difficulty, the contact surface between the solution and air is reduced, the concentration of the solution is kept the same, and the stability of the quality of the prepared nano fibers is ensured. The traditional needle head type or free liquid level type liquid supply method needs to be changed for realizing the purpose.
Disclosure of Invention
The invention aims to solve the technical problem of providing a smearing type circulating liquid supply device and a using method thereof, wherein smearing type circulating liquid supply is adopted, the problem that a needle head type spray head is easy to block is solved, a thin layer of solution is smeared for spinning each time in a mode different from a free liquid level liquid supply mode, the rest solution is recycled to a liquid storage tank, circulating liquid supply is realized, waste of the solution is reduced, the rest solution is not exposed in air, volatilization is reduced, the concentration consistency of the rest solution is ensured, and environmental pollution is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a paint formula circulation and supply liquid device, includes liquid feed pump, liquid storage jar and supplies the liquid base, supply liquid base upper end be provided with solution recovery cavity, the opening top of this solution recovery cavity is provided with paints the brush head, supply liquid base lower part in install the liquid storage jar, this liquid storage jar passes through the recovery tube and links to each other with solution recovery cavity bottom, one side of supplying liquid base lower part install the liquid feed pump, this liquid feed pump and liquid storage jar intercommunication, the liquid feed pump supply for in the liquid storage jar for paint the brush head through the liquid feed pipe.
As a supplement to the technical scheme of the invention, the device also comprises a bottom plate, wherein the upper end of the bottom plate is provided with a liquid supply base and a power mechanism for driving the liquid supply base to transversely slide in a reciprocating manner, and the upper end of the liquid supply base is provided with a liquid supply base.
As a supplement to the technical scheme of the invention, the upper end of the bottom plate is provided with two grooves which are arranged transversely side by side, and the bottom of the liquid supply base is provided with a strip-shaped bulge matched with the grooves.
As a supplement to the technical scheme of the invention, the inner wall of the solution recovery chamber is provided with two scrapers side by side, and the two scrapers are positioned below the smearing brush head.
As a supplement to the technical scheme of the invention, the scraper is made of stainless steel, and the upper end of the scraper is in a sharp knife shape.
As a supplement to the technical scheme of the invention, the whole smearing brush head is made of polytetrafluoroethylene material, and a contact end at the lower part of the smearing brush head is made of silica gel material.
As a supplement to the technical scheme of the invention, upper notches are symmetrically formed at two sides of the upper end of the liquid supply base positioned at the opening of the solution recovery chamber, a liquid storage cover is mounted at the upper end of the liquid supply base, and lower notches are symmetrically formed at two sides of the lower end of the liquid storage cover.
As a supplement to the technical scheme of the invention, one end of the recovery pipe connected with the liquid storage tank is provided with a filter disc.
As a supplement to the technical solution of the present invention, the method for using the smearing type circulating liquid supply device comprises the following steps:
(1) injecting the prepared spinning solution into a liquid storage cylinder, opening a liquid supply pump to convey the spinning solution to the smearing brush head through a liquid supply pipe, adjusting the gap between the smearing brush head and the spray head, and adjusting the proper flow;
(2) and (3) dripping redundant solution, scraping the solution at the bottom of the spray head by a scraper, enabling the redundant solution to fall into a solution recovery chamber, and flowing back to the liquid storage tank through a recovery pipe and a filter sheet to realize the recovery of the solution and supply liquid in a circulating manner.
(3) The liquid supply base is driven to drive the liquid supply device to do reciprocating transverse motion so as to supply liquid for the coating of the spray head.
Has the advantages that: the invention relates to a smearing type circulating liquid supply device and a using method thereof, which adopt smearing type circulating liquid supply to avoid the problem that a needle head type spray head is easy to block, and different from a free liquid level liquid supply mode, a thin layer of solution is smeared for spinning each time, and the rest of solution is recycled to a liquid storage tank, so that circulating liquid supply is realized, the waste of the solution is reduced, the rest of solution is not exposed in the air, volatilization is reduced, the consistency of the rest of solution is ensured, and environmental pollution is reduced. The solution on the spray head is not easy to solidify, the quality of the formed nanofiber membrane is more stable, the nanofiber membrane is not influenced by the spinning time, and the nanofiber can be continuously spun.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a state of use of the present invention;
FIG. 3 is a schematic view of the construction of a doctor blade according to the invention;
FIG. 4 is a schematic view of a reservoir cap according to the present invention.
The figure is as follows: 1. the device comprises a spray head support, 2, a spray head, 3, a liquid supply base, 4, a smearing type circulating liquid supply device, 5, a liquid storage cover, 6, a high-voltage power supply, 7, a groove, 8, a liquid supply pump, 9, a liquid supply pipe, 10, a liquid storage cylinder, 11, a filter plate, 12, a recovery pipe, 13, a smearing brush head, 14, a solution recovery cavity, 15, a scraper, 16, a liquid supply base, 17, an upper notch, 18, a lower notch, 19, a strip-shaped protrusion, 20 and a bottom plate.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The embodiment of the invention relates to an application type circulating liquid supply device and a using method thereof, as shown in fig. 1-4, the application type circulating liquid supply device comprises a liquid supply pump 8, a liquid storage cylinder 10 and a liquid supply base 16, wherein a solution recovery chamber 14 is arranged at the upper end of the liquid supply base 16, an application brush head 13 is arranged above an opening of the solution recovery chamber 14, the liquid storage cylinder 10 is arranged in the lower part of the liquid supply base 16, the liquid storage cylinder 10 is connected with the bottom of the solution recovery chamber 14 through a recovery pipe 12, the liquid supply pump 8 is arranged on one side of the lower part of the liquid supply base 16, the liquid supply pump 8 is communicated with the liquid storage cylinder 10, and the liquid supply pump 8 supplies the solution in the liquid storage cylinder 10 to the application brush head 13 through. The spray head 2 is embedded between the liquid supply cover 5 and the solution recovery chamber 14, and the smearing brush head 13 is arranged right above the spray head 2.
The liquid supply device further comprises a bottom plate 20, the upper end of the bottom plate 20 is provided with a liquid supply base 3 and a power mechanism for driving the liquid supply base 3 to transversely slide in a reciprocating mode, and the upper end of the liquid supply base 3 is provided with a liquid supply base 16. The power mechanism can be a motor and a screw rod matched to realize the transverse sliding of the liquid supply base 3
Two transversely-arranged grooves 7 are arranged at the upper end of the bottom plate 20 side by side, and strip-shaped bulges 19 matched with the grooves 7 are arranged at the bottom of the liquid supply base 3.
Two scrapers 15 are arranged on the inner wall of the solution recovery chamber 14 side by side, and the two scrapers 15 are positioned below the smearing brush head 13. Two scrapers 15 are located directly below the spray head 2.
The scraper 15 is made of stainless steel, and the upper end of the scraper 15 is in a sharp knife shape.
The whole smearing brush head 13 is made of polytetrafluoroethylene materials, and a contact end at the lower part of the smearing brush head 13 is made of silica gel materials.
The upper end of the liquid supply base 16 is symmetrically provided with upper notches 17 at two sides of the opening of the solution recovery chamber 14, the upper end of the liquid supply base 16 is provided with a liquid storage cover 5, and the two sides of the lower end of the liquid storage cover 5 are symmetrically provided with lower notches 18.
And a filter plate 11 is arranged at one end of the recovery pipe 12 connected with the liquid storage tank 10.
The application method of the smearing type circulating liquid supply device comprises the following steps:
(1) injecting the prepared spinning solution into a liquid storage cylinder 10, opening a liquid supply pump 8 to convey the spinning solution to an application brush head 13 through a liquid supply pipe 9, adjusting the gap between the application brush head 13 and a spray head 2, and adjusting the appropriate flow;
(2) and (3) dripping redundant solution, scraping the solution at the bottom of the spray head 2 by a scraper 15, enabling the redundant solution to fall into a solution recovery chamber 14, and flowing back to the liquid storage tank 10 through a recovery pipe 12 and a filter 11 to realize the recovery of the solution and the circulating liquid supply.
(3) The liquid supply base 3 is driven to drive the liquid supply device 4 to do reciprocating transverse motion along the track of the groove 7 to paint and supply liquid for the spray head 2.
Fig. 2 is a schematic structural diagram of an electrostatic spinning device to which a smearing type circulating liquid supply device 4 is applied, and as shown in fig. 2, the electrostatic spinning device comprises a nozzle base, a nozzle 2, a liquid supply base 3, a smearing type circulating liquid supply device 4 and a high-voltage power supply 6, the nozzle base comprises a nozzle support 1 and a bottom plate 20, two nozzle supports 1 are symmetrically arranged on two sides of the upper end of the bottom plate 20, the nozzle 2 is installed between the upper ends of the two nozzle supports 1, one end of the nozzle 2 is connected with the high-voltage power supply 6, the liquid supply base 3 which transversely slides in a reciprocating manner is installed between the two nozzle supports 1 at the upper end of the bottom plate 20, the smearing type circulating liquid supply device 4 is installed on the liquid supply base 3, and the smearing type circulating liquid supply device 4 supplies.
The use method of the electrostatic spinning device comprises the following steps:
(1) injecting the spinning solution into the smearing type circulating liquid supply device, opening a liquid supply pump 8 of the smearing type circulating liquid supply device to convey the spinning solution above the spray head 2, and adjusting the proper flow;
(2) driving the liquid supply base 3 to drive the smearing type circulating liquid supply device to do transverse reciprocating motion along the track of the groove 7 of the bottom plate 20, and starting the fiber collecting mechanism; the power device for driving the liquid supply base 3 to do transverse reciprocating motion can adopt the matching of a motor and a screw rod or the matching of the motor and a gear.
(3) And (3) turning on the high-voltage power supply 6, adjusting high voltage until a plurality of spinning solution jet flows are sprayed out from the spray head 2, and depositing on the fiber collecting mechanism to obtain the nanofiber membrane.
The device is adopted to supply liquid, and the solution is N, N Dimethylformamide (DMF) solution of Polyacrylonitrile (PAN) with the mass concentration of 10%.
Claims (8)
1. A daub formula circulation confession liquid device, includes confession liquid pump (8), liquid storage cylinder (10) and confession liquid base (16), its characterized in that: a solution recovery chamber (14) is arranged at the upper end of the liquid supply base (16), a smearing brush head (13) is arranged above an opening of the solution recovery chamber (14), a liquid storage cylinder (10) is arranged in the lower part of the liquid supply base (16), the liquid storage cylinder (10) is connected with the bottom of a solution recovery chamber (14) through a recovery pipe (12), a liquid supply pump (8) is arranged on one side of the lower part of the liquid supply base (16), the liquid supply pump (8) is communicated with the liquid storage cylinder (10), the liquid supply pump (8) supplies the solution in the liquid storage cylinder (10) to the smearing brush head (13) through the liquid supply pipe (9), and the brush head further comprises a bottom plate (20), the upper end of the bottom plate (20) is provided with a liquid supply base (3) and a power mechanism for driving the liquid supply base (3) to transversely slide in a reciprocating manner, and the upper end of the liquid supply base (3) is provided with a liquid supply base (16).
2. The application-type circulating liquid supply device as claimed in claim 1, wherein: the upper end of the bottom plate (20) is provided with two grooves (7) which are transversely arranged side by side, and the bottom of the liquid supply base (3) is provided with a strip-shaped bulge (19) matched with the grooves (7).
3. The application-type circulating liquid supply device as claimed in claim 1, wherein: two scrapers (15) are arranged on the inner wall of the solution recovery chamber (14) side by side, and the two scrapers (15) are positioned below the smearing brush head (13).
4. An application type circulating liquid supply device according to claim 3, wherein: the scraper (15) is made of stainless steel, and the upper end of the scraper (15) is in a sharp knife shape.
5. The application-type circulating liquid supply device as claimed in claim 1, wherein: the whole smearing brush head (13) is made of polytetrafluoroethylene materials, and a contact end at the lower part of the smearing brush head (13) is made of silica gel materials.
6. The application-type circulating liquid supply device as claimed in claim 1, wherein: the upper end of the liquid supply base (16) is symmetrically provided with upper notches (17) at two sides of the opening of the solution recovery chamber (14), the upper end of the liquid supply base (16) is provided with a liquid storage cover (5), and the two sides of the lower end of the liquid storage cover (5) are symmetrically provided with lower notches (18).
7. The application-type circulating liquid supply device as claimed in claim 1, wherein: one end of the recovery pipe (12) connected with the liquid storage tank (10) is provided with a filter disc (11).
8. The use method of the application type circulating liquid supply device according to claim 1, comprising the following steps:
(1) injecting the prepared spinning solution into a liquid storage cylinder (10), opening a liquid supply pump (8) to convey the spinning solution to an application brush head (13) through a liquid supply pipe (9), adjusting the gap between the application brush head (13) and a spray head (2), and adjusting the appropriate flow;
(2) the redundant solution is dripped, the scraper (15) scrapes the solution at the bottom of the spray head (2), the redundant solution falls into a solution recovery chamber (14), and flows back to the liquid storage tank (10) through a recovery pipe (12) via a filter (11), so that the solution is recovered and the liquid is supplied circularly;
(3) the liquid supply base (3) is driven to drive the liquid supply device (4) to do reciprocating transverse motion so as to paint and supply liquid for the spray head (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910592621.6A CN110284205B (en) | 2019-07-03 | 2019-07-03 | Smearing type circulating liquid supply device and using method |
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| CN201910592621.6A CN110284205B (en) | 2019-07-03 | 2019-07-03 | Smearing type circulating liquid supply device and using method |
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| CN110284205A CN110284205A (en) | 2019-09-27 |
| CN110284205B true CN110284205B (en) | 2020-10-23 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7815427B2 (en) * | 2007-11-20 | 2010-10-19 | Clarcor, Inc. | Apparatus and method for reducing solvent loss for electro-spinning of fine fibers |
| CN101880916A (en) * | 2010-06-04 | 2010-11-10 | 殷雪琰 | Method for mass production and preparation of nano-fiber |
| KR101478184B1 (en) * | 2012-09-21 | 2014-12-31 | (주)우리나노필 | Electro-spinning nozzle pack and electro-spinning system comprising the same |
| CN102978718B (en) * | 2012-12-11 | 2015-01-21 | 东南大学 | Device and method for realizing mass production of nano-fibers through electrostatic spinning method |
| CN103194806B (en) * | 2013-04-25 | 2015-06-17 | 杨宝麟 | Polymer solution electrostatic spinning component, device and method |
| CN203904514U (en) * | 2014-06-19 | 2014-10-29 | 中国药科大学 | Multifunctional electrostatic spinning device |
| CN105624808B (en) * | 2016-04-06 | 2017-09-12 | 佛山轻子精密测控技术有限公司 | A kind of annular flake shape electrode electrostatic spinning apparatus |
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Effective date of registration: 20211201 Address after: 1882 Yan'an west road, Changning District, Shanghai Patentee after: DONGHUA University Patentee after: NARI Weikang (Shanghai) Technology Co., Ltd Address before: 201620 No. 2999 North Renmin Road, Songjiang new town, Songjiang District, Shanghai. Patentee before: DONGHUA University Patentee before: Nantong Dingyu Textile Machinery Technology Co., Ltd |