CN113430654A

CN113430654A - Free liquid level electrostatic spinning device

Info

Publication number: CN113430654A
Application number: CN202110852397.7A
Authority: CN
Inventors: 徐岚; 樊培志
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-09-24

Abstract

The application relates to a free liquid level electrostatic spinning device, includes: the containing parts are provided with at least two containing parts and are used for containing solution; the rotating assembly is connected with the at least two containing pieces and drives the containing pieces to rotate; a high voltage generating member disposed at one side of the rotating assembly; a receiving member disposed at one side of the receiving member and grounded; the circulating liquid supply assembly is used for collecting the solution overflowing from the containing part and conveying the solution to the containing part; the circulating liquid supply assembly comprises a spray head for conveying solution, and the containing part is positioned below the spray head in the height direction of the free liquid level electrostatic spinning device. Through being provided with the circulation and supplying liquid subassembly, its excessive solution that will hold a collection back to carry to the shower nozzle from bottom to top, the shower nozzle is located the top that holds a, and then carries solution in the piece that holds to being located the below, when avoiding taking place the shower nozzle jam, still reaches the effect of avoiding extravagant, and simple structure, convenient operation.

Description

Free liquid level electrostatic spinning device

[ technical field ] A method for producing a semiconductor device

The application relates to a free liquid level electrostatic spinning device, and belongs to the technical field of spinning.

[ background of the invention ]

Electrospinning is currently the most common method used in the world to produce nanofibers. In recent years, due to the rapid temperature rise of nano material research, the great interest of people in deep research on electrostatic spinning is aroused. The electrostatic spinning technology has the advantages of simple and convenient operation, wide application range, relatively high production efficiency and the like, and the spun nano-fiber is thin, large in specific surface area and high in porosity, and becomes a hot point of research.

However, the traditional electrostatic spinning equipment has low spinning efficiency and limits the batch production of the nano fibers, so that free liquid level spinning is produced at the same time. The spinning principle is that the electrostatic force provided by a high-voltage electric field is utilized to overcome the surface tension of the polymer liquid surface, a Taylor cone is formed on the polymer liquid surface, jet flow is further formed, and the jet flow is attenuated into nano fibers under the action of an electric field force.

However, although the common free liquid level spinning can realize batch preparation of the nanofibers, the defects that the jet flow is unstable, the solution is easy to solidify, the spinning state cannot be continued, the resource waste is easy to generate and the like exist. And the traditional continuous liquid supply device supplies liquid from the bottom of the groove for containing the solution to the top, and the liquid supply mode is easy to block in the spinning process and influences the continuous preparation of the nanofiber membrane. Although the external liquid supply device can effectively supply liquid, the power supply needs to be turned off, and the liquid supply in the working state has high-pressure risk, so that the yield of the nano fibers is influenced.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

[ summary of the invention ]

An object of the application is to provide a free liquid level electrostatic spinning device, it can improve spinning efficiency and spinning output, convenient and fast.

The purpose of the application is realized by the following technical scheme: a free liquid level electrospinning apparatus comprising:

the device comprises at least two containing parts, wherein the containing parts are used for containing solutions;

the rotating assembly is connected with at least two containing parts and drives the containing parts to rotate;

a high voltage generating member disposed at one side of the rotating assembly;

a receiving member disposed at one side of the receiving member and grounded; and

the circulating liquid supply assembly is used for collecting the solution overflowing from the containing part and conveying the solution to the containing part;

the circulating liquid supply assembly comprises a spray head for conveying a solution, and the containing piece is positioned below the spray head in the height direction of the free liquid level electrostatic spinning device.

In one embodiment, the circulating liquid supply assembly comprises a solution pool, the spray head is connected with the solution pool through a liquid guide pipe, and the rotating assembly is arranged in the solution pool. .

In one embodiment, the solution pool is obliquely arranged, the obliquely arranged solution pool is provided with a peak, and the spray head is arranged on the opposite side of the solution pool from the peak.

In one embodiment, each of the containers has an initial position and a filling position, the rotating assembly drives the container to switch between the initial position and the filling position, the container is far away from the spray head in the initial position, and the spray head delivers the solution into the container in the filling position.

In one embodiment, a boss is arranged in the solution pool, an accommodating groove is formed between the boss and the edge of the solution pool, and the rotating assembly is arranged on the boss.

In one embodiment, the center of the rotating assembly coincides with the center of the boss.

In one embodiment, the rotating assembly comprises a driving shaft connected with a driving part and a supporting shaft connected with the driving shaft, and at least two containing parts are connected with the supporting shaft.

In one embodiment, the solution tank is circular in cross-section;

the holding piece is arranged at the end side of the supporting shaft, and the length of the supporting shaft is smaller than the minimum diameter of the solution pool.

In one embodiment, the high voltage generator comprises a high voltage power supply and a metal slide sheet electrically connected with the high voltage power supply.

In one embodiment, each holding piece is also provided with a spinning position, and when the holding piece is located at the spinning position, the holding piece is in contact connection with the metal sliding piece to perform spinning.

In one embodiment, the receiving element is arranged above the receiving element in the spinning position.

Compared with the prior art, the method has the following beneficial effects: through being provided with the circulation and supplying liquid subassembly, its excessive solution that will hold a collection back to carry to the shower nozzle from bottom to top, the shower nozzle is located the top that holds a, and then carries solution in the piece that holds to being located the below, when avoiding taking place the shower nozzle jam, still reaches the effect of avoiding extravagant, and simple structure, convenient operation.

[ description of the drawings ]

Fig. 1 is a schematic structural view of the free liquid surface electrospinning device according to the present application.

[ detailed description ] embodiments

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. 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 application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, a free liquid level electrospinning device according to a preferred embodiment of the present invention includes at least two containers 1 for holding a solution, a rotating assembly 2 connected to the at least two containers 1 and driving the containers 1 to rotate, a high voltage generator 3 disposed at one side of the containers 1, and a receiver 4, wherein the receiver 4 is disposed above an opening of the container 1 for better receiving nanofibers. The receiving member 4 may be a receiving net, a receiving roller, etc., and is not particularly limited herein, depending on the actual situation. The receiving part 4 is grounded, the high-voltage generating part 3 is connected with the containing part 1 to form an electrostatic field with the receiving part 4, the spinning solution in the containing part 1 overcomes the surface tension of the liquid level of the polymer under the action of the electrostatic field, a Taylor cone is formed on the liquid level of the polymer, jet flow is further formed, and the jet flow is attenuated into nano fibers under the action of the electric field force.

In the above, the rotating assembly 2 drives the containing member 1 to rotate, and the high-voltage generating member 3 is in contact with the containing member 1 rotated to the attachment thereof to achieve electrical connection. The rotating assembly 2 comprises a driving shaft 21 connected with the driving member and a supporting shaft 22 connected with the driving shaft 21, and at least two containing members 1 are connected with the supporting shaft 22. The driving member is a motor. In the present embodiment, the containing member 1 is disposed at the end side of the supporting shaft 22, and in other embodiments, the containing member 1 may be disposed at other positions of the supporting shaft 22, which is not particularly limited herein, according to the actual situation. Moreover, the number of the holding members 1 in the present application is four, and correspondingly, the number of the supporting shafts 22 is two. In other embodiments, the number of the containers 1 may be other, for example, three or five, etc., and is not limited specifically herein, depending on the actual situation.

The high voltage generating member 3 includes a high voltage power supply 31 and a metal sliding plate 32 electrically connected to the high voltage power supply 31, wherein the metal sliding plate 32 is made of a conductive metal, such as copper, iron, etc., and is not particularly limited herein, depending on the actual situation. As described above, the containers 1 are rotated by the rotating assembly 2, and thus, each of the containers 1 further has a spinning position, and when located at the spinning position, the container 1 is in contact with the metal slide 32 to perform spinning. Correspondingly, the material of the holding member 1 is also conductive metal, and the conductive metal is the same as the material of the metal sliding sheet 32, which is not described herein again.

For better cooperation with metal sliding sheet 32, in this embodiment, hold a 1 and be circular-arc, circular-arc holds a 1 and has the evagination cambered surface, metal sliding sheet 32 and the cooperation contact of evagination cambered surface.

The liquid supply assembly in the prior art is generally externally arranged, and conveys the solution from bottom to top in the spinning process, and the liquid supply mode easily causes blockage of the spinning nozzle 54, thereby influencing continuous preparation of the nanofiber membrane. In addition, when liquid is supplied, the high-voltage power supply 31 needs to be turned off to supply liquid, and the liquid supply in the working state has a high-voltage risk, but the yield of the nano fibers is affected. Therefore, in order to prevent the occurrence of the phenomenon of clogging the spray head 54 during the liquid supply process and simultaneously prevent the waste of the spinning solution, the free level spinning apparatus of the present application further includes the circulating liquid supply assembly 5.

As the name implies, the circulating liquid supply assembly 5 is intended to collect the solution overflowing from the containing member 1 and to supply it to the containing member 1. Specifically, the circulating liquid supply assembly 5 comprises a solution tank 51 and a spray head 54 communicated with the solution tank 51 through a liquid guide pipe 53, and the rotating assembly 2 is arranged in the solution tank 51. In the height direction of the free level electrospinning device, the holding member 1 is located below the shower head 54. Every holds a 1 and has initial position and liquid feeding position, and rotating assembly 2 drive holds a 1 and switches between initial position and liquid feeding position, and when being located the initial position, hold a 1 and keep away from shower nozzle 54 and set up, when being located the liquid feeding position, shower nozzle 54 is to holding and carry solution in 1.

The solution tank 51 is circular in cross section. In order to prevent the spinning solution in the container 1 from overflowing to the outside of the solution tank 51, the length of the support shaft 22 is smaller than the minimum diameter of the solution tank 51. In the present embodiment, the solution pool 51 has a cylindrical shape, and therefore, the diameter of the solution pool 51 is uniform in each place. In other embodiments, the solution tank 51 may also be tapered, and in this case, the length of the support shaft 22 should be smaller than the minimum diameter of the tapered solution tank 51.

Specifically, a boss 52 is arranged in the solution pool 51, the boss 52 and the edge of the solution pool 51 form a containing groove, the rotating assembly 2 is arranged on the boss 52, and the driving member can be arranged in the boss 52. In this embodiment, the center of the rotating assembly 2 coincides with the center of the boss 52. That is, the center of the driving shaft 21 coincides with the center of gravity of the boss 52 to facilitate the arrangement of the driving assembly, and each of the receiving members 1 comes into contact with the metal slide piece 32 to achieve spinning when reaching a position close to the metal slide piece 32. At this time, the position where the containing member 1 contacts the metal slide 32 to spin is the spinning position.

The solution tank 51 is disposed obliquely, the obliquely disposed solution tank 51 has a peak, and the spray head 54 is disposed on the opposite side of the solution tank 51 from the peak. That is, the spray head 54 is disposed at the lowest point of the solution tank 51, and the spinning solution can move from the highest point to the lowest point and be collected. The spinning solution is conveyed to the spray head 54 through the liquid guide pipe 53 under the action of the pump, and is conveyed to the containing part 1 positioned below the spray head 54 through the spray head 54 from top to bottom, so that the spray head 54 is effectively prevented from being blocked, the spinning solution is recycled, and the waste of the spinning solution is prevented.

The implementation process of the free liquid level spinning device comprises the following steps: the driving part is started to drive the driving shaft 21 to rotate, and then the supporting shaft 22 is driven to rotate, so that one of the containing parts 1 moves to a spinning position, and the metal sliding sheet 32 is in contact with the containing part 1 to realize spinning. While the containing element 1 in the spinning position is now in the filling position, the nozzle 54 can feed the solution into the containing element 1. The other two containers 1 are in the initial position and do not perform spinning nor filling. At this point, the drive stops. After a certain time interval, the drive element drives the drive shaft 21 to rotate again until the next receiving element 1 is in the spinning position. The above-mentioned mode can raise spinning efficiency, at the same time can prevent spray head 54 from blocking up.

In summary, the following steps: through being provided with circulation liquid supply assembly 5, it will hold the excessive solution collection back of 1 to carry to shower nozzle 54 from bottom to top, shower nozzle 54 is located the top that holds 1, and then carries solution in holding 1 to being located the below, when avoiding taking place shower nozzle 54 and blockking up, still reaches the effect of avoiding extravagant, and simple structure, convenient operation.

The above is only one specific embodiment of the present application, and any other modifications based on the concept of the present application are considered as the protection scope of the present application.

Claims

1. A free liquid level electrospinning apparatus comprising:

a high voltage generating member disposed at one side of the rotating assembly;

2. The free-liquid electrospinning device of claim 1 wherein the circulating liquid supply assembly comprises a solution reservoir to which the spray head is connected via a liquid conduit and the rotating assembly is disposed within the solution reservoir.

3. The free-surface electrospinning device of claim 2 wherein the solution pool is inclined, the inclined solution pool has a peak, and the spray head is disposed on a side of the solution pool opposite the peak.

4. The free-level electrospinning apparatus of claim 2 wherein each of said containers has an initial position and a filling position, said rotary assembly driving said container between said initial position in which said container is positioned away from said nozzle and said filling position in which said nozzle delivers solution into said container.

5. The free liquid level electrospinning device of claim 2, wherein a boss is provided in the solution tank, the boss and an edge portion of the solution tank form a receiving groove, and the rotating member is provided on the boss.

6. The free-liquid electrospinning device of claim 5 wherein the center of the rotating assembly coincides with the center of the boss.

7. The free-liquid-level electrospinning device of claim 2, wherein the rotating assembly comprises a drive shaft connected to a drive member and a support shaft connected to the drive shaft, at least two of the receptacles being connected to the support shaft.

8. The free-surface electrospinning apparatus of claim 7 wherein the solution pool is circular in cross-section;

9. The free-liquid-level electrospinning device of claim 1, wherein the high voltage generating member comprises a high voltage power supply and a metal slide electrically connected to the high voltage power supply.

10. The free-liquid electrospinning device of claim 9 wherein each said receptacle further comprises a spinning position in which said receptacle is in contact with said metallic slide for spinning.