Electrospinning device for preparing multi-scale nanofibers

Abstract

The present application relates to an electrospinning device for preparing multi-scale nanofibers, including a driving device; a syringe fixed on the driving device, the syringe including a tube body and a piston arranged in the tube body, the driving device driving the piston to move; a nozzle assembly including a main body connected to the tube body and at least two nozzles connected to the main body; a power supply device electrically connected to the nozzle assembly; and a receiving device arranged toward the nozzle assembly; wherein at least two nozzles are arranged step by step from the main body toward the receiving device, and the nozzles of the adjacent two levels have an upper nozzle close to the receiving device and a lower nozzle away from the receiving device, and the diameter of the upper nozzle is smaller than the diameter of the lower nozzle. The present application provides nozzles with multiple diameters, so that the nozzle assembly of the electrospinning device can simultaneously produce multi-scale nanofiber membranes, improve spinning efficiency, and is simple to operate.

Description

Technical Field

[0001] The invention relates to an electrostatic spinning device for preparing multi-scale nanofibers, belonging to the technical field of electrostatic spinning. Background Art

[0002] Compared with traditional electrospinning, multi-scale nanofiber membranes have higher specific surface area, better mechanical properties, and better biocompatibility. Therefore, multi-scale nanofiber membranes have good application prospects in the fields of environment, biomedicine, and energy. The multi-scale nanonet structure can increase the specific surface area and porosity of the material, reduce the filtration resistance, and improve the filtration adsorption of the nanofiber membrane. In the prior art, multi-scale nanofiber membranes are usually prepared by adding additives to the spinning solution to make the generated jet unstable. However, during the preparation process, the production of nanofiber membranes will be affected by various factors, reducing the spinning efficiency and even causing spinning failure. Summary of the invention

[0003] The object of the present invention is to provide an electrospinning device which can prepare multi-scale nanofiber membranes and has simple operation and high spinning efficiency.

[0004] To achieve the above object, the present invention provides the following technical solution: an electrospinning device for preparing multi-scale nanofibers, comprising:

[0005] Drive device;

[0006] A syringe, fixed on the driving device, the syringe comprising a tube body and a piston arranged in the tube body, and the driving device drives the piston to move;

[0007] A spray head assembly, comprising a main body connected to the tube body and at least two stages of nozzle parts connected to the main body;

[0008] a power supply device, electrically connected to the nozzle assembly; and

[0009] A receiving device, disposed toward the nozzle assembly;

[0010] Among them, at least two levels of the nozzle parts are arranged step by step from the main body toward the receiving device, and the nozzle parts of two adjacent levels include an upper-level nozzle part close to the receiving device and a lower-level nozzle part away from the receiving device, and the diameter of the upper-level nozzle part is smaller than the diameter of the lower-level nozzle part.

[0011] Furthermore, at least two levels of the nozzle parts and the main body part are arranged in the same plane.

[0012] Furthermore, at least two levels of nozzle portions are distributed step by step along the circumferential direction of the main body portion.

[0013] Furthermore, in the nozzle parts of two adjacent stages, the lower stage nozzle part is arranged on the upper stage nozzle part.

[0014] Furthermore, at least two levels of the nozzle parts are arranged on the main body part.

[0015] Furthermore, the receiving device is a horizontal plate or an arc-shaped plate or a three-dimensional mold.

[0016] Furthermore, the electrospinning device also includes a collecting device, which includes a unwinding shaft, a reeling shaft, and a substrate connecting the unwinding shaft and the reeling shaft, and the substrate is covered on the receiving surface of the receiving device.

[0017] Furthermore, a driving assembly is also provided on the collecting device, and the driving assembly synchronously drives the unwinding shaft to rotate along a first direction and drives the rewinding shaft to rotate along a second direction.

[0018] Furthermore, the collecting device comprises a plurality of rollers, and the plurality of rollers drive the substrate to move.

[0019] Furthermore, the power supply device and the receiving device are both grounded.

[0020] The beneficial effects of the present invention are as follows: the present application sets at least two levels of nozzle parts which are arranged step by step from the main body toward the receiving device, and the nozzle parts of the two adjacent levels include an upper nozzle part close to the receiving device and a lower nozzle part far away from the receiving device, and the diameter of the upper nozzle part is smaller than the diameter of the lower nozzle part, that is, the nozzle assembly of the electrostatic spinning device has nozzles of multiple sizes at the same time, which can simultaneously produce nanofiber membranes of multiple scales, thereby improving the spinning efficiency. Compared with the prior art, there is no need to add additional additives to the spinning solution, and the operation is simpler.

[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 A schematic diagram of the structure of an electrospinning device for preparing multi-scale nanofibers according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 The structural schematic diagram of the nozzle assembly shown;

[0024] Figure 3 It is a schematic structural diagram of a nozzle assembly according to another embodiment of the present invention. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figures 1 to 3 , an electrospinning device for preparing multi-scale nanofibers shown in one embodiment of the present invention comprises a driving device 1, a syringe 2, a nozzle assembly 3, a power supply device 4 and a receiving device 5. The syringe 2 is fixed on the driving device 1, and the syringe 2 comprises a tube body 21 and a piston 22 arranged in the tube body 21, and the driving device 1 drives the piston 22 to move. The nozzle assembly 3 comprises a main body 31 connected to the tube body 22 and at least two levels of nozzle parts 32 connected to the main body 31. The power supply device 4 is electrically connected to the nozzle assembly. The receiving device 5 is arranged toward the nozzle assembly 3. Specifically, at least two levels of nozzle parts 32 are arranged step by step from the main body 31 toward the receiving device 5, and the nozzle parts 32 of the adjacent two levels have an upper nozzle part 32 close to the receiving device 5 and a lower nozzle part 32 away from the receiving device, and the diameter of the upper nozzle part 32 is smaller than the diameter of the lower nozzle part 32. By setting the nozzle parts 32 with different diameters, the nozzle assembly 3 can simultaneously produce nanofiber membranes of different sizes, thereby improving the spinning efficiency. Compared with the prior art, there is no need to add additional additives to the spinning solution, and the operation is simpler.

[0027] It should be noted that the driving device 1 is specifically a propulsion pump, the syringe 2 is fixed on the propulsion pump 1, and the tube body 21 has a cavity 23. The propulsion pump 1 pushes the piston 22 to push the spinning solution (not shown) in the cavity 23 to the nozzle assembly 3. In this way, the spinning speed can be controlled by setting the speed at which the propulsion pump 1 pushes the piston 22. The power supply device 4 is electrically connected to the main body 31. When the power supply device 4 is powered, under the action of the electric field, the spinning solution at each nozzle portion 32 of the nozzle assembly 3 can form a jet to form a multi-scale nanofiber membrane. In this embodiment, the power supply device 4 is also provided with a display screen 41 and an adjustment knob 42. The power supply size is changed by adjusting the adjustment knob 42. At the same time, the display screen 41 can also display the relevant data of the power supply device 4. If there is a problem, the user can find and deal with it in time to improve the safety of use. The propulsion pump 1 and the power supply device 4 both adopt the existing technology, so they are not elaborated in detail here.

[0028] In this embodiment, at least two levels of nozzle parts 32 and the main body 31 are arranged in the same plane. Specifically, six levels of nozzle parts 32 are arranged, and the six levels of nozzle parts 32 are named as the first to sixth levels of nozzle parts 32 in sequence from the main body 31 to the direction of the receiving device 5. The diameters of the first to sixth levels of nozzle parts 32 decrease step by step, and each level of nozzle parts 32 do not affect each other. In other embodiments, at least two levels of nozzle parts 32 are distributed step by step along the circumferential direction of the main body 31. Specifically, at least two levels of nozzle parts 32 are regularly or irregularly distributed along the circumferential direction of the main body 31, so that the nozzle assembly 3 presents a three-dimensional structure.

[0029] In the nozzle parts 32 of two adjacent stages, the lower stage nozzle part 32 is arranged on the upper stage nozzle part 32. Taking this embodiment as an example, the second stage nozzle part 32 is arranged on the first stage nozzle part 32, the third stage nozzle part 32 is arranged on the second stage nozzle part 32, and so on (such as Figure 2 ). Of course, in other embodiments, the nozzle part 32 and the main body 31 can also be configured as: at least two stages of nozzle parts 32 are both arranged on the main body 31. According to the shape of the multi-scale nanofiber membrane actually required, the arrangement relationship between the nozzle part 32 and the main body 31 can be adjusted accordingly. It should be noted that the cross section of the nozzle part 32 in this embodiment is circular. In other embodiments, the nozzle part 32 can also be configured as a cross or a triangle, which will not be given one by one here.

[0030] The receiving device 5 is a horizontal plate or an arc plate or a three-dimensional mold. The shape of the receiving device 5 can be adjusted according to the needs. For example, when it is necessary to prepare a multi-scale nanofiber membrane with a three-dimensional structure, at least two stages of nozzle parts 32 need to be distributed step by step along the circumferential direction of the main body 31. Correspondingly, the receiving device 5 needs to be set into a three-dimensional mold of the required shape, such as a cylindrical or hemispherical shape. When powered on, the multi-stage nozzle part 32 will generate jets in multiple directions, and multiple jets are all received by the three-dimensional mold. In this way, a multi-scale nanofiber membrane with a three-dimensional structure can be prepared; when it is necessary to prepare a sheet-like multi-scale nanofiber membrane, at least two stages of nozzle parts 32 and the main body 31 are set in the same plane. At this time, each stage of nozzle parts 32 generates a jet in one direction, and the receiving device 5 can be set as a horizontal plate or an arc plate to receive the jet. In the specific use process, the setting relationship between the nozzle 32 and the main body 31 can be adjusted according to the needs, and a suitable receiving device 5 can be selected to achieve the spinning purpose.

[0031] The electrospinning device also includes a collecting device 6, which includes a reel 61, a reel 62, and a substrate 63 connecting the reel 61 and the reel 62, and the substrate 63 is covered on the receiving surface (unnumbered) of the receiving device 5. By setting the collecting device 6, the formed multi-scale nanofiber membrane can be collected and sorted in time, and it is more convenient to store it together through the reel 62. Of course, in other embodiments, the collecting device 6 may not be provided. It should be noted that the reel 61 is used to transport the substrate 63 to the receiving device 5, the substrate 63 is used to receive the formed multi-scale nanofiber membrane, and the reel 62 is used to reel the substrate 63 attached with the multi-scale nanofiber membrane. The reel 61, the substrate 63 and the reel 62 all adopt the existing technology, so they are not expanded in detail here.

[0032] The collecting device 6 is also provided with a driving assembly (not shown), which synchronously drives the unwinding shaft 61 to rotate in a first direction and drives the reeling shaft 62 to rotate in a second direction. The first direction refers to clockwise or counterclockwise rotation along the central axis of the unwinding shaft 61, and the second direction is opposite to the first direction. When the unwinding shaft 61 rotates clockwise along its central axis, the reeling shaft 62 rotates in the opposite direction from the unwinding shaft 61, which is beneficial to the drawing of the jet and allows the multi-scale nanofiber membrane to be orderly arranged on the substrate 63 covering the receiving surface of the receiving device 5. It should be noted that the driving assembly drives the unwinding shaft 61 and the reeling shaft 62 to rotate intermittently, so that the multi-scale nanofiber membrane produced can be evenly and fully arranged on the substrate 63, and then the section of the substrate 63 is collected in the reeling shaft 62, saving resources and improving the spinning quality.

[0033] The collecting device 6 includes a plurality of rollers 64, and the plurality of rollers 64 drive the substrate 63 to move. In the present embodiment, the number of rollers 64 is three, and the three rollers 64 are named as the first to third rollers 64 in sequence, wherein the two first rollers 64 and the second roller 64 are arranged between the unwinding shaft 61 and the receiving device 5 and are arranged relatively on both sides of the substrate 63, for supporting, arranging and transferring the substrate 63, and the third roller 64 is installed above the receiving device 5, for supporting and transferring the substrate 63 attached with the multi-scale nanofiber membrane. The reel 62 is installed behind the third roller 64, for reeling the substrate 63 attached with the multi-scale nanofiber membrane. Under the joint action of the unwinding shaft 61, the first to third rollers 64 and the reel 62, the continuous preparation of the multi-scale nanofiber membrane is realized.

[0034] The power supply device 4 and the receiving device 5 are both grounded. Excess electricity is discharged through the ground, which prevents the excess electricity from damaging the electrospinning device and also prevents the user from being injured by static electricity when touching the machine, thereby improving the safety of use and extending the service life of the electrospinning device.

[0035] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0036] The above 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 those of ordinary skill in the art, 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. An electrospinning device for preparing multi-scale nanofibers, It is characterized in that include: Drive device; A syringe, fixed on the driving device, the syringe comprising a tube body and a piston arranged in the tube body, and the driving device drives the piston to move; A spray head assembly, comprising a main body connected to the tube body and at least two stages of nozzle parts connected to the main body; A power supply device, electrically connected to the nozzle assembly; and A receiving device, disposed toward the nozzle assembly; Wherein, at least two levels of the nozzle parts are arranged step by step from the main body toward the receiving device, and the nozzle parts of two adjacent levels have an upper nozzle part close to the receiving device and a lower nozzle part away from the receiving device, and the diameter of the upper nozzle part is smaller than the diameter of the lower nozzle part. At least two levels of the nozzle parts are arranged on the main body, and among the nozzle parts of two adjacent levels, the lower nozzle part is arranged on the upper nozzle part; At least two stages of the nozzle parts and the main body are arranged in the same plane, the receiving device is configured as a horizontal plate or an arc plate, at least two stages of the nozzle parts jet in one direction to the horizontal plate or the arc plate to form a planar multi-scale nanofiber membrane, or, at least two stages of the nozzle parts are distributed step by step along the circumferential direction of the main body, at least two stages of the nozzle parts are regularly or irregularly distributed along the circumferential direction of the main body to make the nozzle assembly present a spatial three-dimensional structure, the receiving device is configured as a cylinder or a hemisphere, at least two stages of the nozzle parts jet in multiple directions to the cylinder or hemisphere to form a three-dimensional multi-scale nanofiber membrane.

2. The electrospinning device for preparing multi-scale nanofibers according to claim 1, It is characterized in that The electrostatic spinning device also includes a collecting device, which includes a reel-out shaft, a reel-in shaft, and a substrate connecting the reel-out shaft and the reel-in shaft, and the substrate covers the receiving surface of the receiving device.

3. The electrospinning device for preparing multi-scale nanofibers according to claim 2, It is characterized in that The collecting device is provided with a driving assembly, and the driving assembly synchronously drives the unwinding shaft to rotate along a first direction and drives the rewinding shaft to rotate along a second direction.

4. The electrospinning device for preparing multi-scale nanofibers according to claim 3, It is characterized in that The collecting device comprises a plurality of rollers, and the plurality of rollers drive the substrate to move.

5. The electrospinning device for preparing multi-scale nanofibers according to claim 1, It is characterized in that The power supply device and the receiving device are both grounded.

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