CN216304046U - Electrostatic spinning nozzle and electrostatic spinning device - Google Patents

Abstract

The utility model aims to disclose an electrostatic spinning spray head and an electrostatic spinning device, which realize nanometer-grade fineness and high-efficiency spinning by improving the electrostatic spinning spray head and the device.

Description

Electrostatic spinning nozzle and electrostatic spinning device

Technical Field

The utility model relates to the technical field of electrostatic spinning, in particular to an electrostatic spinning nozzle and an electrostatic spinning device.

Background

Electrospinning is a special fiber manufacturing process, where polymer solutions or melts are jet spun in a strong electric field. Under the action of the electric field, the liquid drop at the needle head changes from a spherical shape to a conical shape (i.e. a Taylor cone), and fiber filaments are obtained by extending from the tip of the cone, so that polymer filaments with nanometer-scale diameters can be produced.

The existing electrostatic spinning equipment has defects in the aspects of spinning fineness and spinning efficiency, and simultaneously, the blockage condition of a nozzle can occur in the spinning process.

In view of the above, there is a need for an improved electrospinning device in the prior art to solve the above problems.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide an electrostatic spinning nozzle and an electrostatic spinning apparatus, which can achieve high-efficiency spinning with nanometer-level fineness by improving the electrostatic spinning nozzle and the electrostatic spinning apparatus.

In order to achieve the first purpose, the utility model provides an electrostatic spinning spray head which comprises a spray head assembly, wherein the spray head assembly comprises a flat-head spray head, a spray head seat and a feeding pipe, a conical space is arranged in the spray head seat, and the feeding pipe, the conical space and the flat-head spray head are communicated.

Preferably, the flat head spray head has an inner diameter of 0.3mm-0.7 mm.

In order to achieve the second object, the utility model provides an electrostatic spinning device, which is characterized by comprising a plurality of groups of rollers, wherein an electrostatic spinning assembly is arranged between two adjacent groups of rollers, the electrostatic spinning assembly comprises a transverse screw rod guide rail and a bracket, the bracket moves along the transverse screw rod guide rail, and a plurality of rows of electrostatic spinning nozzles which are arranged transversely are respectively arranged on two sides of the bracket.

Preferably, a high voltage electric field is arranged between the roller and the flat head spray head.

Preferably, the distance between the head of the flat head spray head and the surface of the roller is 12cm-25 cm.

Preferably, the heads of each row of flat head spray heads are equidistant from the surface of the roller.

Preferably, the distance between adjacent rows of the flat head spray heads is 3cm-10 cm.

Preferably, all electrospinning jets of the same row are fed by the same peristaltic pump.

Preferably, the inner diameters of the flat head spray heads in the same row are the same, and the inner diameters of the flat head spray heads in different rows are the same or different.

Preferably, each set of rollers consists of a first roller and a second roller arranged vertically.

Compared with the prior art, the utility model has the following technical effects:

(1) the spray head assembly is provided with a conical space, polymer fluid enters the storage space of the flat-head spray head through the feeding pipe, and the conical space enables the polymer fluid to be extruded, so that the force of spinning is larger, the polymer fluid can be sprayed farther, filaments in the spraying process can be stretched more favorably, and finer spinning is realized;

(2) the electrostatic spinning device contains a plurality of groups of rollers, and set up electrostatic spinning pack between two sets of adjacent rollers, spinning pack can follow guide rail lateral shifting, drives the electrostatic spinning shower nozzle thereupon and removes, realizes under the roller rotation condition, shower nozzle spun nanofiber can irregularly adhere at roller surface or adhesion at the substrate surface through the roller, after the cooperation between the multiunit roller, be equivalent to a plurality of spinning packs in collaborative work, can make spinning efficiency promote by a wide margin.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic cross-sectional view of an electrospinning spray head according to the present invention;

FIG. 2 is a schematic side view of an electrospinning apparatus of the present invention;

FIG. 3 is a schematic front view of an electrospinning spin pack of the present invention;

FIG. 4 is a schematic feed diagram of an electrospinning apparatus according to the present invention.

Wherein, 1, a flat head spray head; 2. a nozzle base; 21. a conical space; 3. a feed pipe; 4. a roller; 41. a first set of rollers; 42. a second set of rollers; 43. a third set of rollers; 5. a transverse lead screw guide rail; 6. a support; 7. an electrostatic spinning nozzle; 8. a peristaltic pump; 9. a storage tank.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Example 1

Referring to fig. 1, this example discloses an embodiment of an electrospinning nozzle.

The electrostatic spinning spray head comprises a spray head component, wherein the spray head component comprises a flat head spray head 1, a spray head seat 2 and a feeding pipe 3, a conical space 21 is arranged in the spray head seat 2, and the feeding pipe 3, the conical space 31 and the flat head spray head 1 are communicated. Specifically, in order to realize that the spinning is more powerful and can be farther under the same pressure, a storage space formed by a conical space 21 is designed, polymer fluid enters the storage space of the flat-head nozzle through a feeding pipe, and the conical space enables the polymer fluid to be extruded, so that the spinning force is larger, the spinning can be farther, filaments in the jetting process can be more favorably stretched, finer spinning is realized, and finer fibers are formed.

In order to further guarantee the fineness of the spun yarns, the inner diameter of the flat head nozzle is 0.3mm-0.7mm, in the spinning process, the main power source of the spinning is derived from a high-voltage electric field and the pumping pressure of polymer fluid, the polymer content in the polymer fluid is generally 10%, namely, the diameter of the actual spun yarns is smaller than one tenth of the inner diameter of the nozzle, namely, the maximum diameter of the spun yarns is 0.03mm-0.07mm, and the spun yarns are further divided and stretched in the process of being shot to rollers or base materials, so that the nano-grade fine fibers are finally attached to the rollers or the base materials.

Example 2

Referring to fig. 2 and 4, this example discloses an embodiment of an electrospinning apparatus.

The electrostatic spinning device, as shown in fig. 2 and fig. 3, includes a plurality of groups of rollers 4, an electrostatic spinning pack is disposed between two adjacent groups of rollers, the electrostatic spinning pack includes a transverse screw rod guide 5 and a bracket 6, the bracket 6 moves along the transverse screw rod guide 5, and two sides of the bracket 6 are respectively provided with a plurality of rows of electrostatic spinning nozzles 7 arranged transversely as described in embodiment 1. Specifically, the transverse direction refers to a direction parallel to the rollers 4, referring to fig. 2, the electrostatic spinning device, the plurality of groups of rollers 4 comprise a first group of rollers 41, a second group of rollers 42, a third group of rollers 43, and so on to an nth group of rollers 4n, each group of rollers comprises a first roller and a second roller which are vertically arranged, the plurality of groups of rollers 4 are helpful for performing spinning in a multi-group cooperation manner, so that the spinning efficiency is improved, an electrostatic spinning assembly is arranged between the first group of rollers 41 and the second group of rollers 42, between the second group of rollers 42 and the third group of rollers 43, and so on to an n-1 group of rollers 4(n-1) and an nth group of rollers 4n, the electrostatic spinning assembly comprises a transverse screw guide rail 5 and a bracket 6, the bracket 6 moves along the transverse screw guide rail 5, four transverse rows of electrostatic nozzles 7 are respectively arranged on two sides of the bracket 6, that is the shower nozzle 7 of support 6 one side is towards a set of roller promptly, and the shower nozzle 7 of support 6 opposite side is towards another set of roller, the benefit of design like this lies in, four rows of electrostatic spinning shower nozzles 7 are in work simultaneously towards a set of roller, electrostatic spinning shower nozzle 7 is still moving along horizontal lead screw guide 5 simultaneously, realize that many shower nozzles spout the silk simultaneously under the removal circumstances, make and spout the silk more even and have more fibre intercrossing, it is littleer to make the filtering material aperture that forms, the hole shape is also more crooked, thereby improve filtration efficiency, in addition, form the cooperation between the multiunit roller, spout simultaneously under the silk circumstances, the spinning filter material of the same thickness, required time shortens by a wide margin.

It should be further noted that the electrostatic spinning is mainly to form the polymer into filamentous fibers and adhere the filamentous fibers to the surface of the object through a high-voltage electric field, in this embodiment, the high-voltage electric field is set between the roller 4 and the flat head nozzle 1, and the voltage of the high-voltage electric field is between 2 ten thousand volts and 3 ten thousand volts, and between the voltages, the polymer fluid is difficult to form aggregation, and the possibility of blocking the flat head nozzle 1 is reduced.

In order to ensure that the diameter of the spinning is nanometer, the distance between the head of the flat head nozzle 1 and the surface of the roller 4 is 12cm-25cm, and in the distance range, the filaments are divided and stretched, so that the nanometer fine fibers are attached to the surface of an object.

In order to prevent the voltage difference between the adjacent rows of the electrostatic spinning nozzles 7 and thus the effect and the trend of spinning are disturbed, the distance between the head of each row of the flat-head nozzles 1 and the surface of the roller 4 is equal, because the surface of the roller is a circular arc, and in order to prevent the voltage difference between the adjacent rows of the electrostatic spinning nozzles 7, the top row and the bottom row of the electrostatic spinning nozzles 7 are closer to the axis of the roller 4, which is shown in fig. 2.

In order to reduce the mutual interference between the adjacent rows of the electrostatic spinning nozzles 7, the distance between the adjacent rows of the flat head nozzles is 3cm-10 cm.

In order to ensure that the polymer fluid outlet pressure in each nozzle 7 is the same, referring to fig. 4, the same peristaltic pump 8 is used to supply the polymer fluid to all the electrostatic spinning nozzles 7 in the same row, specifically, a plurality of polymer fluids are stored in the storage tank 9, pass through the peristaltic pump 8, enter the header pipe, and then enter the tapered spaces arranged in each nozzle seat, so that the polymer fluid outlet pressure in each nozzle 7 in the same row can be ensured to be the same.

In order to spray the fine fibers with different apertures, the inner diameters of the flat head spray heads 1 in the same row are the same, the inner diameters of the flat head spray heads 1 in different rows are the same or different, and the fine fibers with different diameters can be sprayed to the rollers 4 simultaneously under the condition that the inner diameters of the flat head spray heads 1 in different rows are different, so that a structure with different-diameter fibers laid in layers is formed, and the fine fiber filtering device has the characteristic of an asymmetric filtering material.

Through this embodiment, electrostatic spinning device contains a plurality of groups of rollers, and set up electrostatic spinning pack between two sets of adjacent rollers, spinning pack can follow guide rail lateral shifting, drive electrostatic spinning shower nozzle thereupon and remove, realize under the roller rotation condition, shower nozzle spun nanofiber can irregularly adhere on the roller surface or the adhesion is on the substrate surface through the roller, after the cooperation between the multiunit roller, be equivalent to a plurality of spinning packs in collaborative work, can make and spout the promotion by a wide margin of spinning efficiency.

Claims (10)

1. The electrostatic spinning spray head is characterized by comprising a spray head assembly, wherein the spray head assembly comprises a flat head spray head, a spray head seat and a feeding pipe, a conical space is arranged in the spray head seat, and the feeding pipe, the conical space and the flat head spray head are communicated.

2. The electrospinning spray head of claim 1, wherein the flat head nozzle has an inner diameter of 0.3mm to 0.7 mm.

3. An electrospinning device comprising a plurality of sets of rollers, wherein an electrospinning spinning pack is disposed between two adjacent sets of rollers, the electrospinning spinning pack comprises a transverse screw guide and a bracket, the bracket moves along the transverse screw guide, and a plurality of rows of the electrospinning nozzles according to any of claims 1 to 2 are disposed on two sides of the bracket respectively.

4. An electrospinning device as claimed in claim 3, wherein a high voltage electric field is provided between the roller and the flat head nozzle.

5. The electrospinning apparatus of claim 4, wherein the head of the flat head nozzle is spaced from the surface of the roller by a distance of 12cm to 25 cm.

6. The electrospinning apparatus of claim 5, wherein the heads of the flat head nozzles in each row are equidistant from the surface of the roller.

7. The electrospinning apparatus of claim 4, wherein the distance between adjacent rows of the flat head nozzles is 3cm to 10 cm.

8. An electrospinning device according to claim 4, wherein all electrospinning nozzles in a row are fed by the same peristaltic pump.

9. The electrospinning apparatus of any one of claims 3 to 8, wherein the internal diameters of the flat head nozzles in the same row are the same, and the internal diameters of the flat head nozzles in different rows are the same or different.

10. An electrospinning device according to any of claims 3 to 8, wherein each set of rollers consists of a first roller and a second roller arranged vertically.

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