CN210560895U - Batch electrospinning device - Google Patents
Batch electrospinning device Download PDFInfo
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- CN210560895U CN210560895U CN201921259254.XU CN201921259254U CN210560895U CN 210560895 U CN210560895 U CN 210560895U CN 201921259254 U CN201921259254 U CN 201921259254U CN 210560895 U CN210560895 U CN 210560895U
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Abstract
The utility model discloses a batch electrospinning device, which comprises a solution tank, a spray head, a metering pump, a liquid storage tank, a driving system, a fiber precipitator, a three-dimensional motion platform and a high-voltage power supply; the spray head is arranged in the solution tank and comprises a rotating needle and a plurality of annular flow limiting rings; the annular flow limiting ring is coaxially installed with the rotating needle, and the annular flow limiting ring is arranged at equal intervals along the axial direction of the rotating needle; the lower end of the rotating needle extends out of the solution tank and is connected with a driving system; the solution tank is communicated with the metering pump and the liquid storage tank in sequence; the fiber depositor is arranged above the spray head, and the position of the fiber depositor in the working range is changed through the three-dimensional moving platform; the high-voltage power supply is electrically connected with the fiber depositor, and the solution tank, the spinning solution and the spray head are grounded. The utility model discloses utilize weisenberg effect and capillary phenomenon to supply liquid to the shower nozzle, solve among the prior art fibre manufacturing output low, the shower nozzle block up the scheduling problem easily.
Description
Technical Field
The utility model belongs to the technical field of electrostatic spinning, concretely relates to batch electrospinning device.
Background
The electrostatic spinning technology is one of the nanofiber manufacturing technologies, and is widely applied due to the advantages of simple technology, various spinnable materials and the like. The electrostatic spinning device mainly comprises a high-voltage power supply, a spray head, a collecting device and the like, wherein the high-voltage power supply enables a high-voltage electric field to be generated between the spray head and the collecting device, electric charges can be gathered on the surface of liquid drops hung on a spray head opening at the moment, the liquid drops gradually form a Taylor cone and are sprayed to the collecting device, and the liquid drops are finally deposited on the collecting device in a nanofiber form along with the processes of jet whip, stretching, splitting and the like.
The traditional electrostatic spinning technology utilizes a single needle point as a spinning nozzle, single jet flow is generated in the electro-hydraulic coupling process, and the yield is not ideal; in addition, when the viscosity of the spinning solution is high, the spinning needle is easy to block, so that the electrospinning is interrupted. Therefore, the yield of single-needle electrospinning is usually 0.02g/h, and the yield requirement of batch electrospinning of nanofiber membranes cannot be met. In this regard, researchers in the field of electrospinning have studied batch electrospinning apparatuses.
The Elmarco company uses a cylindrical rotating electrode to supply the spinning solution, the spinning yield is effectively improved, and a world patent is applied (WO 2005024101). In addition, the technologies of batch electrospinning of bubbles, batch electrospinning of roller electrodes, batch electrospinning of line electrodes and the like can better solve the problems that the traditional spinning head is easy to block and difficult to clean, and form a plurality of strands of superfine jet flows, so that the spinning efficiency is improved.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to provide an it is difficult to block up, easily wash, can form the superfine efflux of stranded, improve spinning efficiency's batch electrospinning device to prior art's not enough to provide a spinning head.
The technical scheme is as follows: the purpose of the utility model is realized through the following technical scheme:
a batch electrospinning device comprises a solution tank, a spray head, a metering pump, a liquid storage tank, a driving system, a fiber precipitator, a three-dimensional motion platform and a high-voltage power supply;
the spray head is arranged in the solution tank and comprises a rotating needle and a plurality of annular flow limiting rings; the annular flow limiting ring is coaxially arranged with the rotating needle, and is arranged at equal intervals along the axial direction of the rotating needle; the lower end of the rotating needle extends out of the solution tank and is connected with a driving system; the solution tank is communicated with the metering pump and the liquid storage tank in sequence; the fiber depositor is arranged above the spray head, and the position of the fiber depositor in the working range is changed through the three-dimensional moving platform; the high-voltage power supply is electrically connected with the fiber depositor, and the solution tank, the spinning solution and the spray head are grounded.
The driving system is arranged below the solution tank and comprises a rotating motor, a coupler and a motor controller; an output shaft of the rotating motor is in transmission connection with a spray head through a coupler, and the spray head is driven by a driving system to rotate around the axis of the spray head; the rotating motor is electrically connected with the motor controller.
At least one spray head is arranged in the solution tank, and the spray heads are uniformly arranged in the solution tank.
The diameter of the outer surface of the rotating needle is 1 mu m-1 mm, and the length of the rotating needle is 50 mu m-1 cm.
The inner diameter of the annular current-limiting ring is 100 mu m-2 mm, the width of the annular current-limiting ring is 300 mu m-5 mm, and the section of the annular current-limiting ring is rectangular.
The distance between the fiber depositor and the top of the spray head is 5 mm-100 cm.
The preparation method for preparing the nanofiber membrane by using the batch electrospinning device provided by the utility model comprises the following steps:
1) storing the prepared spinning solution into a liquid storage tank;
2) setting the liquid supply speed of a metering pump, and pumping the spinning solution into a solution tank;
3) setting the rotating speed of a rotating motor, and driving a rotating needle to rotate around the axis of the rotating needle, so that the spinning solution climbs to the top of the spray head;
4) setting the output voltage of a high-voltage power supply, forming a Taylor cone by the spinning solution at the top of the spray head under the action of shearing force and a high-voltage electric field, spraying the Taylor cone to a fiber depositor in a jet flow mode, and finally depositing the Taylor cone on the fiber depositor in a nanofiber film mode;
5) and the prepared nanofiber membrane is timely transported out of the spinning area by setting a three-dimensional motion platform.
Preferably, the liquid supply flow rate of the metering pump is 10 mu l/hr-100 ml/hr.
Preferably, the rotating speed range of the rotating motor is 1-8000 RPM.
Preferably, the output voltage range of the high-voltage power supply is 1-70 kV.
Has the advantages that:
(1) the batch electrospinning device is provided with the rotary needle, when the rotary needle rotates, the spinning solution can spontaneously supply liquid to the top of the spray head along the axial direction of the rotary needle, the solution consumption speed is automatically matched with the spinning speed, and the uniformity of fibers is improved;
(2) the batch electrospinning device of the utility model is provided with a plurality of annular current-limiting rings to control the thickness of the solution at the periphery of the rotating needle; meanwhile, the solution is transported in the gap between the rotating needle and the annular flow limiting ring, and the capillary phenomenon also occurs, which is beneficial to transporting the solution;
(3) the plurality of annular current-limiting rings of the batch electrospinning device are uniformly arrayed along the axial direction of the rotating needle, and a certain gap is reserved between every two adjacent annular current-limiting rings, so that the contact area between the solution and the annular current-limiting rings is reduced, and the problem of nozzle blockage is avoided to a certain extent;
(4) when the rotating needle is driven by the rotating motor to spin, the spinning solution near the rotating needle generates a Wessenberg phenomenon; the utility model discloses electrospinning device utilizes weisenberg effect and capillary phenomenon to supply liquid to the shower nozzle in batches, has solved among the prior art fibre manufacturing output low, the easy scheduling problem that blocks up of shower nozzle.
Drawings
Fig. 1 is a schematic structural diagram of the batch electrospinning device of the present invention.
In the figure: the spinning device comprises a rotating motor 1, a solution tank 2, a liquid storage tank 3, a spray head 4, a rotating needle 41, an annular flow limiting ring 42, a metering pump 5, a high-voltage power supply 6, a Taylor cone 7, a three-dimensional moving platform 8, a fiber depositor 9, a motor controller 10, a jet flow 11, a coupler 12 and a spinning solution 13.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the specific embodiments and the attached drawings, but the scope of the present invention is not limited to the embodiments.
As shown in fig. 1: a batch electrospinning device comprises a solution tank 2, a spray head 4, a metering pump 5, a liquid storage tank 3, a driving system, a fiber precipitator 9, a three-dimensional moving platform 8 and a high-voltage power supply 6.
The spray head 4 is arranged in the solution tank 2, and the spray head 4 consists of a rotating needle 41 and 4 annular current-limiting rings 42; the annular flow limiting ring 42 and the rotating needle 41 are coaxially arranged, the annular flow limiting ring 42 is arranged along the rotating needle 41 at equal intervals in the axial direction, and the lower end of the rotating needle 41 extends out of the solution tank 2 and is connected with a driving system; the self-rotating speed range of the rotating needle 41 is 1-8000 RPM. Wherein the rotating needle 41 can be a medical acupuncture needle, a tungsten probe, etc., and has an outer surface diameter range of 1 μm to 1mm and a length range of 50 μm to 1 cm; the inner diameter range of the annular current limiting ring 42 is 100 mu m-2 mm, the width range is 300 mu m-5 mm, and the section of the annular current limiting ring is rectangular.
The driving system is arranged below the solution tank 2 and consists of a rotating motor 1, a coupling 12 and a motor controller 10; an output shaft of the rotating motor 1 is in transmission connection with the spray head 4 through a coupler 12, and the spray head 4 is driven by a driving system and can stably rotate around the axis of the spray head; the rotating motor 1 is electrically connected with the motor controller 10, and the output rotating speed of the rotating motor 1 can be controlled by setting the motor controller 10, so that the rotation speed of the spray head 4 is controlled.
A metering pump 5 is arranged between the solution tank 2 and the liquid storage tank 3, the solution tank 2 is communicated with the metering pump 5 and the liquid storage tank 3, the liquid supply speed of the metering pump 5 to the solution tank 2 is controlled, and the spinning solution 13 in the liquid storage tank 3 can be pumped into the solution tank 2, so that the solution height of the spinning solution 13 in the solution tank 2 meets the spinning requirement; the liquid supply flow rate of the metering pump 5 is 10 mul/hr-100 ml/hr.
The fiber depositor 9 is arranged above the spray head 4, and the position of the fiber depositor 9 in the working range can be changed through the three-dimensional moving platform 8, so that the spinning space is changed, and the formed nanofiber membrane can be conveyed out of a fiber deposition area; the high-voltage power supply 6 is electrically connected with the fiber depositor 9, the solution tank 2, the spinning solution 13 and the spray head 4 are grounded, and the solution grounding mode can avoid the electric interference of a high-voltage electric field to the rotating motor 1 and related circuits; wherein the fiber precipitator 9 is a collecting plate or a roller or various collecting devices in the technical field of spinning such as a parallel electrode or an electrode net, and the distance between the fiber precipitator and the spray nozzle 4 is 5 mm-100 cm; and the voltage output range of the high-voltage power supply 6 is 1-70 kV.
Based on the above apparatus, the preparation method of the nanofiber membrane of this example is as follows:
the components are assembled according to FIG. 1, wherein the outer diameter of the rotating needle 41 is 200 μm, the length of the rotating needle 41 is 50cm, the inner diameter of the annular flow-limiting ring 42 is 800 μm, the width is 100 μm, the distance between adjacent annular flow-limiting rings 42 is 500 μm, and the polar distance between the fiber depositor 9 and the spray head 4 is 15 cm;
1) storing the prepared spinning solution 13 (12% of polyoxyethylene PEO solution, the solvent is alcohol and distilled water, and the volume ratio of the alcohol to the distilled water is 1:1) in a liquid storage tank 3;
2) setting the liquid supply speed of the metering pump 5 to 800 mul/hr, and pumping the spinning solution 13 into the solution tank 2;
3) setting the rotating speed of the rotating motor 1 to be 4900RPM, driving the rotating needle 41 to rotate around the axis of the rotating needle, and climbing the spinning solution 13 to the top of the spray head 4;
4) setting the output voltage of the high-voltage power supply 6 to be 46kV, forming a Taylor cone 7 by the spinning solution 13 at the top of the spray head 4 under the action of shearing force and a high-voltage electric field, spraying the Taylor cone 7 to the fiber depositor 9 in a jet flow mode, and finally depositing the Taylor cone on the fiber depositor 9 in a nanofiber film mode;
5) and the prepared nanofiber membrane is timely transported out of the spinning area by setting the three-dimensional motion platform 8.
Further, in the present embodiment, the structure, size and fitting relationship of the rotary needle 41 and the annular flow restriction ring 42 are determined on the premise that the wesenberg effect and the capillary effect of the spinning solution 13 are ensured to occur therebetween.
Further supplementing and explaining the embodiment, the metering pump 5 and the liquid storage tank 3 are arranged, and are mainly used for continuously supplying liquid to the solution tank 2, so that the speed of pumping the spinning solution 13 is equal to the speed of the spinning solution 13 consumed by spraying, the height of the liquid level of the spinning solution 13 in the solution tank 2 is ensured to be unchanged, and the stability of the Wessenberg effect and the capillary phenomenon is ensured.
The utility model provides a technical scheme, its key technology lies in shower nozzle 4, and shower nozzle 4 of this embodiment comprises rotatory needle 41 and 4 annular current-limiting ring 42, and its innovation point mainly has following two points: firstly, when the rotating needle 41 is driven by the rotating motor 1 to spin, the spinning solution 13 near the rotating needle 41 generates a weissenberg phenomenon; secondly, 4 annular flow restricting rings 42 are provided, and a capillary phenomenon occurs when the spinning solution 13 is transferred between the outer surface of the rotating needle 41 and the inner surface of the annular flow restricting ring 42. The spinning simultaneously has the Wessenberg effect and the capillary effect in the spray nozzle 4, so the spinning solution 13 in the solution tank 2 is stably and continuously conveyed to the tip of the spray nozzle 4, generates the electro-hydraulic coupling effect under the action of an electric field, and finally is deposited on the fiber depositor 9 in the form of a nanofiber membrane.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A batch electrospinning apparatus, characterized by: comprises a solution tank, a spray head, a metering pump, a liquid storage tank, a driving system, a fiber depositor, a three-dimensional motion platform and a high-voltage power supply;
the spray head is arranged in the solution tank and comprises a rotating needle and a plurality of annular flow limiting rings; the annular flow limiting ring is coaxially arranged with the rotating needle, and is arranged at equal intervals along the axial direction of the rotating needle; the lower end of the rotating needle extends out of the solution tank and is connected with a driving system; the solution tank is communicated with the metering pump and the liquid storage tank in sequence; the fiber depositor is arranged above the spray head, and the position of the fiber depositor in the working range is changed through the three-dimensional moving platform; the high-voltage power supply is electrically connected with the fiber depositor, and the solution tank, the spinning solution and the spray head are grounded.
2. The batch electrospinning apparatus according to claim 1, wherein: the driving system is arranged below the solution tank and comprises a rotating motor, a coupler and a motor controller; an output shaft of the rotating motor is in transmission connection with a spray head through a coupler, and the spray head is driven by a driving system to rotate around the axis of the spray head; the rotating motor is electrically connected with the motor controller.
3. The batch electrospinning apparatus according to claim 1, wherein: at least one spray head is arranged in the solution tank, and the spray heads are uniformly arranged in the solution tank.
4. The batch electrospinning apparatus according to claim 1, wherein: the diameter of the outer surface of the rotating needle is 1 mu m-1 mm, and the length of the rotating needle is 50 mu m-1 cm.
5. The batch electrospinning apparatus according to claim 1, wherein: the inner diameter of the annular current-limiting ring is 100 mu m-2 mm, the width of the annular current-limiting ring is 300 mu m-5 mm, and the section of the annular current-limiting ring is rectangular.
6. The batch electrospinning apparatus according to claim 1, wherein: the distance between the fiber depositor and the spray head is 5 mm-100 cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921259254.XU CN210560895U (en) | 2019-08-06 | 2019-08-06 | Batch electrospinning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921259254.XU CN210560895U (en) | 2019-08-06 | 2019-08-06 | Batch electrospinning device |
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| CN210560895U true CN210560895U (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344125A (en) * | 2019-08-06 | 2019-10-18 | 南京工业职业技术学院 | A kind of batch electric spinning equipment and its method for preparing nano fibrous membrane |
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2019
- 2019-08-06 CN CN201921259254.XU patent/CN210560895U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344125A (en) * | 2019-08-06 | 2019-10-18 | 南京工业职业技术学院 | A kind of batch electric spinning equipment and its method for preparing nano fibrous membrane |
| CN110344125B (en) * | 2019-08-06 | 2024-02-02 | 南京工业职业技术学院 | Batch electrospinning device and method for preparing nanofiber membranes by same |
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