CN210916360U

CN210916360U - Electrostatic spinning device

Info

Publication number: CN210916360U
Application number: CN201921781297.4U
Authority: CN
Inventors: 汪屹; 徐岚
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-07-03
Anticipated expiration: 2029-10-23

Abstract

The application relates to an electrostatic spinning device, which comprises a liquid storage mechanism for placing spinning solution, at least one spinning nozzle arranged on one side of the liquid storage mechanism, a propelling mechanism which is in sliding fit with the liquid storage mechanism and pushes the spinning solution to spin, a driving mechanism for driving the propelling mechanism to move, a high-voltage electrostatic generator connected with the spinning nozzle, and a stirring mechanism connected with the propelling mechanism; the driving mechanism drives the propelling mechanism to move and rotate relative to the liquid storage mechanism, and the piston rotates to drive the stirring mechanism to rotate so that the stirring mechanism stirs the spinning solution to be uniformly dispersed. The stirring mechanism is arranged in the liquid storage mechanism and connected with the propelling mechanism, and the propelling mechanism moves to drive the stirring mechanism to rotate so as to continuously stir the spinning solution, so that the solute is uniformly dispersed in the solution, and the agglomeration phenomenon cannot be generated.

Description

Electrostatic spinning device

Technical Field

The utility model relates to an electrostatic spinning device belongs to electrostatic spinning technical field.

Background

The electrostatic spinning technology is one of the most direct and basic methods for preparing superfine fibers and nano fibers at present, and the nano fibers prepared by the electrostatic spinning technology have the characteristics of ultrahigh specific surface area, extremely high length-diameter ratio, high surface activity, superior mechanical properties (high strength and high toughness) and the like, so that the electrostatic spinning technology has very wide application prospects in different fields of textile engineering, environmental engineering, biotechnology, medical treatment, health and hygiene, energy storage, military, anti-terrorism safety and the like. However, the properties of the solutions used for spinning vary from product to product. Some materials are sometimes added into a solution to try to modify the product, but due to the physicochemical properties of the materials, the materials cannot be completely dissolved in the solution, but are dispersed in the solution, and substances such as MnO2, Carbon Nano Tubes (CNT), graphene and some MOF synthesized particles cannot be well dispersed uniformly in the solution, especially in the spinning process, the solution is kept still in a liquid storage tube, so that the materials sink in the solution due to the self gravity, the solution is obviously layered, and the property distribution of the final product is not uniform. Meanwhile, some solutions are too high in viscosity, and the solution is easy to block a needle head in standing spinning, so that normal spinning is hindered.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrostatic spinning device, it is provided with rabbling mechanism in through stock solution mechanism, and the rabbling mechanism is connected with advancing mechanism, and advancing mechanism moves and stirs spinning solution in order to drive the rabbling mechanism rotation and so ceaselessly for solute homodisperse can not produce the reunion phenomenon in solution.

In order to achieve the above purpose, the utility model provides a following technical scheme: an electrostatic spinning device comprises a liquid storage mechanism for placing spinning solution, at least one spinning nozzle arranged on one side of the liquid storage mechanism, a propelling mechanism which is in sliding fit with the liquid storage mechanism and pushes the spinning solution to spin, a driving mechanism for driving the propelling mechanism to move, a high-voltage electrostatic generator connected with the spinning nozzle, and a stirring mechanism connected with the propelling mechanism; the driving mechanism drives the propelling mechanism to move and rotate relative to the liquid storage mechanism, and the piston rotates to drive the stirring mechanism to rotate so that the stirring mechanism stirs the spinning solution to be uniformly dispersed.

Further, the stirring mechanism is a spiral vortex type spring which is stacked in layers and nested into a ring under the pushing of the pushing mechanism.

Further, the length of the spiral scroll spring is smaller than or equal to that of the liquid storage mechanism.

Furthermore, the stirring mechanism is made of special inert metal or high polymer which does not react with the spinning solution.

Furthermore, the electrostatic spinning device also comprises a receiving mechanism connected with the high-voltage electrostatic generator, and the receiving mechanism is arranged on one side of the spinneret and is grounded.

Further, the receiving mechanism is drum-shaped or net-shaped.

Further, the liquid storage mechanism is a needle tube, and the propelling mechanism is a piston in sliding fit with the needle tube.

The beneficial effects of the utility model reside in that: the stirring mechanism is arranged in the liquid storage mechanism and connected with the propelling mechanism, the propelling mechanism moves to drive the stirring mechanism to rotate so as to continuously stir the spinning solution, so that the solute is uniformly dispersed in the solution and cannot be agglomerated, and the solution with higher viscosity can smoothly flow out of the spinning nozzle due to the vortex generated by the stirring mechanism in the stirring process, so that the normal spinning is ensured;

set stirring mechanism into spiral vortex type spring, spiral vortex type spring when having good elasticity performance, contracts gradually with the layering nestification cyclization under advancing mechanism's promotion, is totally the mosquito-repellent incense form at last and piles together, does not occupy stock solution mechanism's stock solution space to can not cause the waste to solution.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of the electrostatic spinning device of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1, the electrostatic spinning apparatus according to a preferred embodiment of the present invention includes a liquid storage mechanism 7 for storing a spinning solution, at least one spinning nozzle disposed on one side of the liquid storage mechanism 7, a propulsion mechanism 2 sliding-fitted with the liquid storage mechanism 7 to push the spinning solution for spinning, a driving mechanism 1 for driving the propulsion mechanism 2 to move, a high voltage electrostatic generator 5 connected to the spinning nozzle, and an agitating mechanism 6 connected to the propulsion mechanism 2, wherein the driving mechanism 1 drives the propulsion mechanism 2 to move and rotate relative to the liquid storage mechanism 7, and the piston rotates to drive the agitating mechanism 6 to rotate, so that the agitating mechanism 6 agitates the spinning solution to uniformly disperse the spinning solution. In this embodiment, the liquid storage mechanism 7 is a needle tube, the propelling mechanism 2 is a piston slidably engaged with the needle tube, and the driving mechanism 1 is a servo motor. Indeed, in other embodiments, the liquid storage mechanism 7, the propelling mechanism 2 and the servo motor may be other, and are not limited herein according to the actual situation.

The electrostatic spinning device further comprises a receiving mechanism 4 connected with the high-voltage electrostatic generator 5, the receiving mechanism 4 is arranged on one side of the spinneret and is provided with a grounding electrode 3, and the receiving mechanism 4 is in a drum type or net type shape and the like. More specifically, the receiving mechanism 4 is arranged opposite to the spinneret to better receive the nanofibers. In the present embodiment, the receiving means 4 is in the shape of a roller, so that the produced nanofibers are uniformly received on the roller-shaped receiving means 4. Indeed, in other embodiments, the receiving mechanism 4 may have other shapes, and is not limited in particular.

The stirring mechanism 6 is a spiral vortex type spring, the diameter of the spiral vortex type spring is gradually reduced or gradually increased, so that the spiral vortex type spring is stacked in layers and nested into a ring under the pushing of the propelling mechanism 2, and the purpose of the arrangement is that: spiral vortex type spring when having good elasticity performance, contracts gradually and piles up the nestification ring with the layering under advancing mechanism 2's promotion, is the mosquito-repellent incense form at last and piles up together completely, does not occupy stock solution mechanism 7's stock solution space to can not cause the waste to solution. The length of the spiral vortex type spring is smaller than or equal to that of the liquid storage mechanism 7, so that the spinning solution can be stirred in the liquid storage mechanism 7 better. The stirring mechanism 6 is made of special inert metal or high polymer which does not react with the spinning solution, so that the quality of the finally prepared nano composite fiber membrane is ensured.

The utility model discloses an implementation process does: the spinning solution is prepared, the spinning solution is placed in the liquid storage mechanism 7, the driving mechanism 1 is started, the rotating speed of the driving mechanism 1 is adjusted, the driving mechanism 1 drives the propelling mechanism 2 to advance and rotate, and the stirring mechanism 6 rotates and is compressed along with the advancing and rotating of the propelling mechanism 2 so as to ceaselessly stir the spinning solution and prevent the spinning solution from being agglomerated in the liquid storage mechanism 7. And simultaneously, the high-voltage electrostatic generator 5 is started, an electrostatic field is generated between the liquid storage mechanism 7 and the receiving mechanism 4, the spinning solution is pushed to be sprayed from the spinning nozzle and is stretched into filaments under the action of the electrostatic field force, so that a Taylor cone is formed and is finally received on the receiving mechanism 4.

Three examples are specifically described below.

The first embodiment is as follows:

the spinning solution in this example is a graphene solution that is easily agglomerated in a solution. Firstly, preparing a 12% (m/v) PAN solution, then weighing 0.5766g of graphene, adding the graphene into the stirred PAN solution, continuously stirring for 6h conventionally, so that the graphene can be primarily dispersed in the PAN solution, and performing ultrasonic treatment in an ultrasonic instrument for 1h after stirring is completed, so that the graphene can be better dispersed. Then the solution is injected into the liquid storage mechanism 7, and the spiral vortex type stirring mechanism 6 and the propelling mechanism 2 are arranged at one end of the liquid storage mechanism 7. Then, the driving mechanism 1 is turned on, the rotation speed is adjusted to 200rpm, and the advancing speed is adjusted to 1mL/h, so that the advancing mechanism 2 and the stirring mechanism 6 can be stably advanced and rotated. And then the solution flows out from a spinning head at the tail end of the liquid storage mechanism 7, the high-voltage electrostatic generator 5 is opened at the moment, the voltage is adjusted to be 18KV, the jet flow is stretched into filaments under the strong action of the electrostatic field of the high-voltage electrostatic generator 5, a Taylor cone is formed and received by the receiving mechanism 4, and finally the nano composite fiber membrane with uniformly dispersed graphene is formed.

Example two:

the spinning solution in this example is a non-dispersible Carbon Nanotube (CNT) solution. Firstly preparing polyaniline solution, weighing 0.1g of polyaniline solution, dissolving the polyaniline solution in 10ml of chloroform, adding 0.129g of camphorsulfonic acid, stirring for 12 hours at room temperature by using a magnetic stirrer, and then filtering by using a filter membrane. Then 0.1g of CNT is added, and ultrasonic treatment is carried out for 2h to carry out primary dispersion on the CNT. Then electrostatic spinning can be carried out. Firstly, the solution is injected into the liquid storage mechanism 7, and at the moment, the spiral vortex type stirring mechanism 6 and the propelling mechanism 2 are positioned at one end of the liquid storage mechanism 7. Then, the driving mechanism 1 is turned on, the rotating speed is adjusted to be 100rpm, and the advancing speed is adjusted to be 0.8mL/h, so that the advancing mechanism 2 and the stirring mechanism 6 can be stably advanced and rotated. And then the solution flows out of a spinneret of the liquid storage mechanism 7, the high-voltage electrostatic generator 5 is started at the moment, the voltage is adjusted to be 20KV, the jet flow is stretched into filaments under the strong action of the electrostatic field of the high-voltage electrostatic generator 5, Taylor cones are formed and received by the receiving mechanism 4, and finally the polyaniline carbon nanotube composite fiber membrane with uniformly dispersed CNT is formed.

Example three:

the spinning solution in this example is a chitosan/PVA solution with a higher viscosity. Firstly, a chitosan/PVA solution is prepared, the concentration of the chitosan/PVA solution is 8%, the concentration of acetic acid is 2%, the mass ratio of chitosan to PVA is 1:1, the surface tension of the final solution is 57.06mN/m, the viscosity of the solution is 20Pa.s, the viscosity is very high, continuous spinning can not be normally carried out in the traditional electrostatic spinning device, and the needle head of the spinning device can be blocked. After the improved device is adopted, firstly, the solution is injected into the liquid storage mechanism 7, and at the moment, the spiral vortex type stirring mechanism 6 and the propelling mechanism 2 are positioned at the tail end of the liquid storage mechanism 7. Then, the driving mechanism 1 is turned on, the rotating speed is adjusted to be 500rpm, and the advancing speed is adjusted to be 0.5mL/h, so that the advancing mechanism 2 and the stirring mechanism 6 can be stably advanced and rotated. And then the solution flows out of a spinneret of the liquid storage mechanism 7, the high-voltage electrostatic generator 5 is started at the moment, the voltage is adjusted to be 25KV, the jet flow is stretched into filaments under the strong action of the electrostatic field of the high-voltage electrostatic generator 5, Taylor cones are formed and received by the receiving mechanism 4, and finally the chitosan/PVA nanofiber membrane is formed.

In summary, the following steps: the stirring mechanism 6 is arranged in the liquid storage mechanism 7, the stirring mechanism 6 is connected with the propelling mechanism 2, the propelling mechanism 2 moves to drive the stirring mechanism 6 to rotate so as to continuously stir the spinning solution, so that the solute is uniformly dispersed in the solution, the agglomeration phenomenon cannot be generated, and the solution with higher viscosity can smoothly flow out of a spinning nozzle by the vortex generated by the stirring mechanism 6 during stirring, so that the normal running of spinning is ensured;

set stirring mechanism 6 into spiral vortex type spring, spiral vortex type spring when having good elasticity performance, shrink gradually with the layering nestification cyclization under advancing mechanism 2's promotion, at last be mosquito-repellent incense form pile together completely, do not occupy stock solution mechanism 7's stock solution space to can not cause the waste to solution.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An electrostatic spinning device is characterized by comprising a liquid storage mechanism for placing spinning solution, at least one spinning nozzle arranged on one side of the liquid storage mechanism, a propelling mechanism which is in sliding fit with the liquid storage mechanism and pushes the spinning solution to spin, a driving mechanism for driving the propelling mechanism to move, a high-voltage electrostatic generator connected with the spinning nozzle, and a stirring mechanism connected with the propelling mechanism; the driving mechanism drives the propelling mechanism to move and rotate relative to the liquid storage mechanism, and the propelling mechanism rotates and then drives the stirring mechanism to rotate, so that the stirring mechanism stirs the spinning solution to be uniformly dispersed.

2. The electrospinning apparatus of claim 1, wherein the agitation mechanism is a spiral scroll-type spring that is stacked in layers and nested into a ring under the urging of the urging mechanism.

3. The electrospinning apparatus of claim 2, wherein the helical scroll spring has a length less than or equal to the length of the reservoir.

4. The electrospinning apparatus of claim 1, wherein the stirring mechanism is made of an inert metal or a high polymer that does not chemically react with the spinning solution.

5. The electrospinning apparatus of claim 1, further comprising a receiving mechanism coupled to the high voltage electrostatic generator, wherein the receiving mechanism is disposed on a side of the spinneret and is grounded.

6. The electrospinning apparatus of claim 5, wherein the receiving mechanism is drum-type or web-type.

7. The electrospinning apparatus of claim 1, wherein the reservoir mechanism is a needle and the advancing mechanism is a piston slidably engaged with the needle.