CN210974940U

CN210974940U - Needleless roller type electrostatic spinning equipment

Info

Publication number: CN210974940U
Application number: CN201920491488.0U
Authority: CN
Inventors: 石浩; 宁平凡; 牛萍娟; 李天童; 李玉豪; 马雪茹
Original assignee: Tianjin Polytechnic University
Current assignee: Tianjin Polytechnic University
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-07-10
Anticipated expiration: 2029-04-10

Abstract

The utility model relates to a needleless roller type electrostatic spinning device, which mainly comprises a high voltage power supply, a liquid tank, a roller, a receiving device and an auxiliary electrode; the anode of the high-voltage power supply is connected with the liquid tank, the cathode of the high-voltage power supply is connected with the receiving device, and the receiving device is positioned above the roller; the electrode is positioned above the receiving device. The utility model discloses a gyro wheel electrostatic spinning equipment has solved the low problem of electrostatic spinning productivity, realizes improving electrostatic spinning nanofiber quality for electrostatic spinning membrane is homogeneous more.

Description

Needleless roller type electrostatic spinning equipment

Technical Field

The utility model relates to an electrostatic spinning equipment, concretely relates to needleless roller type electrostatic spinning equipment with even electric field distribution belongs to nanofiber material preparation field.

Background

The development of modern science and technology puts higher and higher requirements on material performance, and the century is the era that new materials, particularly nano materials, are rapidly developed and widely applied, and the nano materials become one of the important pillars for promoting the progress of modern science and technology. The nanometer material has many unique properties and new rules, such as small-size effect, surface effect, quantum size effect macroscopic quantum tunneling effect, etc. The nanofiber is similar to other nanomaterials, has a very significant size effect, shows many novel characteristics in the aspects of light, heat, magnetism, electricity and the like, is highly concerned by researchers, and is expected to be applied to the fields of clothing, food, medicines, energy, electronics, paper making, aviation and the like. The potential application value of the nano-fiber provides new development space for the development of the preparation technology of the nano-fiber, and also provides new requirements.

The electrospinning technology is one of the most studied and widely used technologies in the field of preparing nanofibers and their applications in recent years. The electrostatic spinning is that polymer solution is charged under a high-voltage electrostatic field, and with the rise of voltage, the electric field force overcomes the tension and viscous force of the drawing surface to make the micro liquid flow jet out from the drawing surface of the solution at high speed, and the micro liquid flow is stretched and thinned under the action of the electric field to be finally solidified into nano fibers with diameters ranging from tens of nanometers to hundreds of nanometers.

The spinneret used in the traditional electrostatic spinning device is mainly a needle capillary tube, and has the advantages of simple equipment, convenient operation and the like. The method can be used for preparing organic, inorganic-organic composite and inorganic nano fibers and the like, the nano fiber material prepared by the electrostatic spinning technology has been successfully applied in the fields of tissue engineering, nerve regeneration, catalysis, filtration, protection, energy, sensors, food engineering, cosmetics and the like, and becomes an important hot problem for research in related fields at home and abroad, and the market scale of the global nano fibers is expected to reach billions of dollars in the year. However, conventional single-needle electrospinning, which is usually produced in one gram hour, has a low production efficiency, so that the use of nanofibers in commercial production is inhibited. Therefore, the exploration of a new method for improving the efficiency of the electrostatic spinning nanofiber is an important direction for the research of the electrostatic spinning technology in the future, and scholars at home and abroad carry out improvement research on the electrostatic spinning device and technology to improve the yield of the electrostatic spinning nanofiber.

Of these studies, most of them focus on the design of the needle, and few have analyzed simple electric field distribution, but few have studied the influence of the auxiliary electrode on the needle-free electrospinning field. Accordingly, a glass flywheel spray head was designed and a ring electrode and an isostatic capacitor were added. The application of the auxiliary electrode not only improves the productivity of electrostatic spinning, but also realizes the inhibition of the bending instability of jet flow.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a needleless roller type electrostatic spinning equipment with even electric field distribution, solved the inhomogeneous problem of fibre membrane structure, and then improve nanofiber preparation efficiency and quality. Therefore, the flywheel nozzle made of glass material is designed, and the auxiliary electrode is added. The application of the auxiliary electrode not only improves the productivity of electrostatic spinning, but also realizes the inhibition of the bending instability of jet flow.

The utility model provides a technical scheme of above-mentioned technical problem is:

the utility model discloses a needleless roller type electrostatic spinning device, which comprises a high voltage power supply, a solution supply device, a spinning device, an auxiliary electrode and a receiving plate; the solution supply device comprises a conveyor and a solution tank; the spinning device comprises a roller; the anode of the high-voltage power supply is connected with the liquid tank, the cathode of the high-voltage power supply is connected with the receiving plate, and the receiving plate is positioned above the spinning nozzle; the electrode is positioned above the receiving plate. The utility model discloses a gyro wheel electrostatic spinning equipment has solved the low problem of electrostatic spinning productivity, realizes improving electrostatic spinning nanofiber quality for electrostatic spinning membrane is more homogeneous. Furthermore, the nozzle of the electrostatic spinning equipment is designed into a roller, and compared with the traditional needle type electrostatic spinning, the electrostatic spinning equipment has the advantages that electrostatic spinning solution cannot block the needle head, and the production efficiency is greatly improved. Further, the roller is made of glass, and the distance between the roller and the liquid groove is 1.0 cm. Further, the electrospinning solution is by adhering to rollers, when at the highest point. Ejection occurs under the force of an electric field. Further, the auxiliary electrode is larger than the copper plate of the receiving plate.

Further, the voltage switched on by the auxiliary electrode is opposite to the voltage switched on by the liquid tank.

Furthermore, voltage is connected to the bottom of the liquid tank, and the receiving plate is grounded.

Drawings

FIG. 1 is a schematic view of an electrospinning apparatus;

FIG. 2 is a schematic view of a liquid bath model;

Detailed Description

The following describes a specific embodiment of the present invention with reference to the drawings.

As shown in fig. 1, the auxiliary electrode roller type electrospinning device of the present embodiment includes a receiving plate 1, a voltage source 2, a liquid tank 5, and an auxiliary electrode 4, wherein the solution supplying device includes a conveyor and a solution tank; the spinning device comprises a roller; the anode of the high-voltage power supply is connected with the liquid tank, the cathode of the high-voltage power supply is connected with the receiving plate, and the receiving plate is positioned above the spinning nozzle; the electrode is positioned above the receiving plate. The electrostatic spinning equipment nozzle is designed into a roller. The roller is made of glass, and the distance between the roller and the liquid groove is 1.0 cm.

The electrostatic spinning equipment nozzle is designed into the roller, and compared with the traditional needle type electrostatic spinning, the electrostatic spinning device has the advantages that electrostatic spinning solution can not block the needle head, and the production efficiency is greatly improved. The roller is made of glass, and the distance between the roller and the liquid groove is 1.0 cm. The electrospinning solution is applied by attachment to rollers, when at the highest point. Ejection occurs under the force of an electric field. The auxiliary electrode is larger than the copper plate of the receiving plate, and the auxiliary electrode is connected with-700V voltage. The bottom of the liquid tank is connected with a voltage, and the receiving plate is grounded.

Referring to fig. 1, the utility model discloses an auxiliary electrode roller type electrostatic spinning equipment with even electric field distribution's specific working process does:

when the electrostatic spinning device works, electrostatic spinning solution is injected into the liquid tank 5, 35kV direct-current voltage is applied to the liquid tank, the receiving plate 1 is grounded, and voltage is applied to the auxiliary electrode. The motor connected with the roller 6 starts to work and rotates at the speed of 20r/min, the electrostatic spinning solution reaches the highest point along with the roller 6, and in the whole working domain, the liquid surface tension and viscous force are overcome under the action of an electric field force, so that tiny liquid flow is ejected from a spinning nozzle at the lower end of the needle at a high speed, and the tiny liquid flow is stretched and thinned under the action of the electric field, and finally solidified into nano fibers with diameters ranging from dozens of nanometers to hundreds of nanometers.

In roller electrostatic spinning, if an auxiliary electrode is not arranged, higher voltage is often needed, and under the same condition, 150kV voltage is needed to enable liquid to be sprayed. The roller electrostatic spinning equipment with the auxiliary electrode greatly reduces the voltage connected to the bottom of the liquid tank, and saves energy. And the liquid drop can be ensured to spray the nano fiber, the uncertainty of the nano fiber spraying area in the electrostatic spinning process is also inhibited, and the uniformity of electric field distribution is improved.

Claims

1. A needleless roller type electrostatic spinning device is characterized in that: comprises a high-voltage power supply, a liquid tank, a roller, a receiving device and an auxiliary electrode; the anode of the high-voltage power supply is connected with the liquid tank, the cathode of the high-voltage power supply is connected with the receiving device, and the receiving device is positioned above the roller; the electrode is positioned above the receiving device.

2. The needle-free roller electrospinning apparatus of claim 1, wherein the electrospinning apparatus nozzles are designed as rollers.

3. The needle-free roller electrospinning apparatus of claim 2, wherein the roller is made of glass and the roller is 1.0cm from the liquid bath.

4. The needle-free roller electrospinning apparatus of claim 1, wherein the electrospinning solution is sprayed by an electric field force by attaching to a roller when at the highest point.

5. The needle-free roller electrospinning apparatus of claim 1, wherein the auxiliary electrode is larger than the copper plate of the receiving plate.

6. The needle-free roller electrospinning apparatus of claim 5, wherein the auxiliary electrode is switched on at a voltage opposite to the liquid bath switching voltage.

7. The needle-free roller electrospinning apparatus of claim 1, wherein the liquid tank bottom is connected to a voltage potential and the receiving plate is grounded.