Rotatable lifting sawtooth electrospinning device

Abstract

The present application relates to a rotatable lifting sawtooth electrostatic spinning device, comprising: a liquid storage tank for holding a spinning solution; a high-voltage electrostatic generator electrically connected to the liquid storage tank; a sawtooth disk disposed in the liquid storage tank and movable relative to the liquid storage tank; a driving mechanism for driving the sawtooth disk to move; and a receiving mechanism disposed on one side of the sawtooth disk to receive the prepared nanofibers, the receiving mechanism being grounded to form an electrostatic field with the liquid storage tank; the sawtooth disk has a plurality of tip portions, a groove for holding a spinning solution is formed between two adjacent tip portions, and the driving mechanism drives the sawtooth disk to move along the axial direction of the liquid storage tank so that when the sawtooth disk extends to the spinning liquid surface of the spinning solution, the liquid surface of the spinning solution in the groove is flush with the tip portion. It can prevent the spinning solution from solidifying and improve the spinning efficiency.

Description

Technical Field

[0001] The invention relates to a rotatable lifting type sawtooth electrostatic spinning device, belonging to the technical field of electrostatic spinning. Background Art

[0002] At present, as the basis of nanofibers, electrospun nanofibers have become a hot spot in applied research. Electrospun nanofibers have obvious advantages, mainly reflected in the wide range of spinnable raw materials, adjustable structure, diverse morphology, and large fiber specific surface area. The electrospinning equipment is simple and the technical operation is simple, but the traditional electrospinning equipment has low spinning efficiency, which limits the mass production of nanofibers. Therefore, free surface spinning came into being. As a new spinning method, free surface electrospinning uses the electrostatic force provided by the high-voltage electric field to overcome the surface tension of the polymer liquid surface, form a Taylor cone on the polymer liquid surface, and further form a jet. The jet is stretched into nanofibers under the action of the electric field force. However, although ordinary free surface spinning can achieve batch preparation of nanofibers, it also has defects such as unstable jets, easy coagulation of solutions, uneven spinning, and easy waste of resources. Summary of the invention

[0003] The object of the present invention is to provide a rotatable lifting sawtooth electrostatic spinning device, which can prevent the spinning solution from coagulating and improve the spinning efficiency.

[0004] In order to achieve the above object, the present invention provides the following technical solution: a rotatable lifting sawtooth electrospinning device, comprising:

[0005] A liquid storage tank for holding a spinning solution;

[0006] A high-voltage electrostatic generator electrically connected to the liquid storage tank;

[0007] a serrated disk disposed in the liquid reservoir and movable relative to the liquid reservoir;

[0008] A driving mechanism for driving the sawtooth disk to move;

[0009] and a receiving mechanism disposed on one side of the sawtooth disk to receive the prepared nanofibers, the receiving mechanism being grounded to form an electrostatic field with the liquid storage tank;

[0010] The serrated disk has a plurality of pointed ends, and a groove for holding the spinning solution is formed between two adjacent pointed ends. The driving mechanism drives the serrated disk to move axially along the liquid storage tank so that when the serrated disk extends to the spinning liquid surface of the spinning solution, the liquid surface of the spinning solution in the groove is flush with the pointed ends.

[0011] Furthermore, the plurality of tip portions are equidistantly distributed.

[0012] Furthermore, the driving mechanism includes a lifting component for driving the serrated disk to move axially along the liquid reservoir, and a rotating component for driving the serrated disk to move circumferentially along the liquid reservoir, and the lifting component is connected to the rotating component.

[0013] Furthermore, the lifting component is any one of an electric cylinder, a hydraulic cylinder, a pneumatic cylinder and a lead screw.

[0014] Furthermore, the rotating component is a rotating motor.

[0015] Furthermore, a through hole is provided on the liquid storage tank, and at least a part of the driving mechanism extends into the liquid storage tank through the through hole to be connected with the sawtooth disk.

[0016] Furthermore, a sealing member is provided on the liquid storage tank, and the sealing member is used to prevent the spinning solution from flowing out from the gap between the through hole and the driving mechanism.

[0017] Furthermore, the sealing member is a rubber ring or a silicone ring.

[0018] Furthermore, the rotatable and liftable sawtooth electrospinning device also includes a liquid supply mechanism connected to the liquid storage tank to supply liquid to the liquid storage tank.

[0019] Furthermore, the receiving mechanism is a roller.

[0020] The beneficial effects of the present invention are as follows: by providing a driving mechanism and a serrated disk, the driving mechanism can drive the serrated disk to move relative to the liquid storage tank, thereby stirring the spinning solution in the liquid storage tank to prevent the spinning solution from coagulating, reduce the viscosity of the solution, improve the material dispersion of the solution and increase the drawing force of the electric field on the solution during spinning, thereby improving the spinning efficiency; by providing a serrated disk, the serrated disk has a tip portion and a groove is formed between two adjacent tip portions, the groove is used to hold the spinning solution, and the tip portion provides more spinning sites, further improving the spinning efficiency.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the rotatable lifting sawtooth electrospinning device of the present invention. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] See also Figure 1 In a preferred embodiment of the present invention, a rotatable lifting sawtooth electrospinning device comprises a liquid reservoir 3 for holding a spinning solution, a high-voltage electrostatic generator 5 electrically connected to the liquid reservoir 3, a sawtooth disk 1 disposed in the liquid reservoir 3 and movable relative to the liquid reservoir 3, a driving mechanism 2 for driving the sawtooth disk 1 to move, and a receiving mechanism 6 disposed on one side of the sawtooth disk 1 to receive the prepared nanofibers, wherein the liquid reservoir 3 is connected to the positive electrode of the high-voltage electrostatic generator 5, and the receiving mechanism 6 is grounded 7 and connected to the negative electrode of the high-voltage electrostatic generator 5, so that an electrostatic field is formed between the receiving mechanism 6 and the liquid reservoir 3, so that the spinning solution forms a Taylor cone under the action of the electrostatic field, and the surface tension of the Taylor cone is further overcome under the action of the electrostatic field to generate a jet, and the jet is stretched into a filament under the action of the electrostatic field until it is received by the receiving mechanism 6. That is, in this embodiment, the material of the liquid reservoir is a conductive metal, and the conductive metal can be copper, iron, etc.

[0025] In this embodiment, the receiving mechanism 6 is arranged just above the sawtooth disk 1, and the receiving mechanism 6 is a roller 6. The roller 6 rotates under the drive of an external force, and the external force can be a mechanical force of a driving motor or a human force, which is not specifically limited here and depends on the actual situation. The roller 6 rotates at a constant speed under the drive of an external force, so that the prepared nanofibers can be evenly received on the roller 6 to improve the quality of the nanofibers.

[0026] Among them, the liquid reservoir 3 is in the shape of a ring, and correspondingly, the serrated disk 1 is also in the shape of a ring, so that the serrated disk 1 matches the liquid reservoir 3. Of course, in other embodiments, the shape of the liquid reservoir 3 may also be other, which is not specifically limited here, and it depends on the actual situation. The serrated disk 1 has a plurality of tip portions 11, and a groove for holding the spinning solution is formed between two adjacent tip portions 11. The driving mechanism 2 drives the serrated disk 1 to move along the axial direction of the liquid reservoir 3 so that when the serrated disk 1 extends to the spinning liquid surface of the spinning solution, the liquid surface of the spinning solution in the groove is flush with the tip portion 11. In order to ensure the spinning quality, in this embodiment, a plurality of tip portions 11 are equidistantly distributed. Of course, in other embodiments, the tip portions 11 may also be arranged at non-equidistant intervals, which is not specifically limited here, and it depends on the actual situation.

[0027] The driving mechanism 2 includes a lifting assembly for driving the sawtooth disk 1 to move along the axial direction of the liquid reservoir 3, and a rotating assembly for driving the sawtooth disk 1 to move along the circumferential direction of the liquid reservoir 3, wherein the lifting assembly is connected to the rotating assembly, wherein the axial direction of the liquid reservoir 3 is the height direction of the liquid reservoir 3, and the circumferential direction of the liquid reservoir 3 is the circumferential direction of the liquid reservoir 3. The lifting assembly is any one of an electric cylinder, a hydraulic cylinder, a cylinder and a screw, and the rotating assembly is a rotating motor. In this embodiment, the rotating motor is connected to the sawtooth disk 1. Of course, in other embodiments, an electric cylinder or the like may be connected to the sawtooth disk 1, that is, the upper and lower positions of the connection between the rotating assembly and the lifting assembly are not limited, and the purpose of rotation and lifting can be achieved. A through hole is provided on the liquid reservoir 3, and at least part of the driving mechanism 2 extends into the liquid reservoir 3 through the through hole and is connected to the sawtooth disk 1. In order to prevent the spinning solution from flowing out of the gap between the through hole and the driving mechanism 2, a sealing member is also provided on the liquid reservoir 3. The sealing member is a rubber ring or a silicone ring, and only needs to achieve a sealing effect.

[0028] The rotatable and liftable sawtooth electrospinning device also includes a liquid supply mechanism 4 connected to the liquid storage tank 3 to supply liquid to the liquid storage tank 3. The liquid supply mechanism 4 is connected to the liquid storage tank 3 through a liquid guide tube. Correspondingly, a seal is also provided between the liquid guide tube and the liquid storage tank 3 to prevent leakage of the spinning solution and waste of the spinning solution.

[0029] The implementation process of the rotatable lifting sawtooth electrostatic spinning device of the present invention is as follows: the liquid supply mechanism 4 is turned on to inject the spinning solution into the liquid reservoir 3 at a constant rate until the liquid surface of the spinning solution is flush with the upper surface of the liquid reservoir 3. At the same time, the high-voltage electrostatic generator 5 and the driving mechanism 2 are turned on, and the sawtooth disk 1 is continuously rotated and lifted in the spinning solution under the control of the driving mechanism 2. When the sawtooth disk 1 extends out of the spinning solution, the spinning solution on the liquid reservoir 3 and the sawtooth disk 1 forms a Taylor cone under the action of high-voltage static electricity. The surface tension of the Taylor cone is further overcome under the action of the electrostatic field to generate a jet, and the jet is stretched into a filament under the action of the electrostatic field and received by the roller receiving mechanism 6, and finally a large number of uniform nanofibers are formed.

[0030] To sum up: by providing a driving mechanism 2 and a serrated disk 1, the driving mechanism 2 can drive the serrated disk 1 to move relative to the liquid storage tank 3, and then stir the spinning solution in the liquid storage tank 3 to prevent the spinning solution from coagulating, reduce the viscosity of the solution, improve the material dispersion of the solution and increase the drawing force of the electric field on the solution during spinning, thereby improving the spinning efficiency; by providing a serrated disk 1, the serrated disk 1 has a tip portion 11 and a groove is formed between two adjacent tip portions 11, the groove is used to hold the spinning solution, and the tip portion 11 provides more spinning sites, further improving the spinning efficiency.

[0031] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A rotatable lifting sawtooth electrospinning device, characterized in that: include: A liquid storage tank for holding a spinning solution, wherein the liquid storage tank is in a ring shape; A high-voltage electrostatic generator electrically connected to the liquid storage tank; A sawtooth disk disposed in the liquid reservoir and movable relative to the liquid reservoir, wherein the sawtooth disk is in a circular ring shape; A driving mechanism for driving the sawtooth disk to move, the driving mechanism comprising a lifting assembly for driving the sawtooth disk to move axially along the liquid reservoir, and a rotating assembly for driving the sawtooth disk to move circumferentially along the liquid reservoir, the lifting assembly being connected to the rotating assembly; and a receiving mechanism disposed on one side of the sawtooth disk to receive the prepared nanofibers, the receiving mechanism being grounded to form an electrostatic field with the liquid storage tank; The serrated disk has a plurality of pointed ends, and a groove for holding the spinning solution is formed between two adjacent pointed ends. The driving mechanism drives the serrated disk to move axially along the liquid storage tank so that when the serrated disk extends to the spinning liquid surface of the spinning solution, the liquid surface of the spinning solution in the groove is flush with the pointed ends.

2. The rotatable lifting sawtooth electrospinning device according to claim 1, characterized in that: A plurality of pointed ends are equidistantly distributed.

3. The rotatable lifting sawtooth electrospinning device according to claim 1, characterized in that: The lifting component is any one of an electric cylinder, a hydraulic cylinder, a pneumatic cylinder and a lead screw.

4. The rotatable lifting sawtooth electrospinning device according to claim 1, characterized in that: The rotating component is a rotating motor.

5. The rotatable lifting sawtooth electrospinning device according to claim 1, characterized in that: The liquid storage tank is provided with a through hole, and at least a part of the driving mechanism extends into the liquid storage tank through the through hole and is connected with the sawtooth disk.

6. The rotatable lifting sawtooth electrospinning device according to claim 5, characterized in that: The liquid storage tank is also provided with a sealing member, which is used to prevent the spinning solution from flowing out of the gap between the through hole and the driving mechanism.

7. The rotatable lifting sawtooth electrospinning device according to claim 6, characterized in that: The sealing element is a rubber ring or a silicone ring.

8. The rotatable lifting sawtooth electrospinning device according to claim 1, characterized in that: The rotatable lifting sawtooth electrostatic spinning device also includes a liquid supply mechanism connected to the liquid storage tank to supply liquid to the liquid storage tank.

9. The rotatable lifting sawtooth electrospinning device according to claim 1, characterized in that: The receiving mechanism is a roller.

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