Micro-nano controllable electrostatic spinning device

Abstract

The micro-nano controllable electrostatic spinning device comprises a base plate, an electrostatic spinning module and a moving module, the base plate is provided with a working surface for deposition of micro-nano fibers, the electrostatic spinning module comprises a spray head and a receiving electrode, the spray head and the receiving electrode are located on the two opposite sides of the base plate respectively, and an electrostatic field is arranged between the spray head and the receiving electrode. The moving module drives the electrostatic spinning module and the substrate to move relatively along a preset track. According to the electrostatic spinning device, the moving module drives the electrostatic spinning module and the base plate to move relatively along the preset track, due to the fact that the spray head and the receiving electrode move synchronously, under the guidance of the receiving electrode, the track of the micro-nano fibers deposited on the base plate is the same as the preset track, and therefore a micro-nano fiber directionally-distributed micro-network is formed. The comprehensive performance of the polymer material can be improved, and application and expansion of the electrostatic spinning technology are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spinning, in particular to a micro-nano controllable electrostatic spinning device. Background Art

[0002] Electrospinning technology can use electrostatic field forces to prepare micro-nano structures, allowing polymer droplets to overcome surface tension under the action of high-voltage electrostatic fields to produce jet streams. The streams are stretched and solidified during the jetting process and fall onto the processing platform to form continuous polymer nanofibers. In related technologies, electrospinning fibers are generally randomly stacked, and the direction of fiber formation cannot be controlled, and a directional fiber network cannot be formed, which limits the expansion of the application scope of electrospinning technology. Summary of the invention

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a micro-nano controllable electrostatic spinning device capable of forming continuous oriented micro-nano fibers.

[0004] According to the micro-nano controllable electrospinning device in the embodiment of the utility model, it includes:

[0005] A substrate having a working surface for deposition of micro-nano fibers;

[0006] An electrospinning module, comprising a nozzle and a receiving electrode, wherein the nozzle is used to spray an electrospinning solution toward the substrate, the nozzle and the receiving electrode are respectively located on opposite sides of the substrate, and an electrostatic field is provided between the nozzle and the receiving electrode, so that the electrospinning solution sprayed from the nozzle forms micro-nano fibers and is deposited on the working surface;

[0007] A moving module, the electrostatic spinning module and / or the substrate is connected to the moving module, and the moving module drives the electrostatic spinning module and the substrate to move relative to each other along a preset track.

[0008] The micro-nano controllable electrospinning device according to the embodiment of the utility model has at least the following beneficial effects:

[0009] In the utility model, the moving module drives the electrospinning module and the substrate to move relative to each other along a preset trajectory. Since the nozzle and the receiving electrode move synchronously, under the guidance of the receiving electrode, the trajectory of the micro-nano fibers deposited on the substrate is the same as the preset trajectory, thereby forming a microscopic network of micro-nano fibers with directional distribution, which can improve the comprehensive properties of polymer materials and is conducive to the application expansion of electrospinning technology.

[0010] According to some embodiments of the present utility model, a moving surface is defined to be parallel to the working surface, and the moving module is connected to the substrate and drives the substrate to move parallel to the moving surface;

[0011] And / or, the nozzle and the receiving electrode are both connected to the moving module, and the moving module drives the nozzle and the receiving electrode to move synchronously parallel to the moving surface.

[0012] According to some embodiments of the utility model, the moving module includes a first driving mechanism, which includes a driving component and a bracket, the nozzle and the receiving electrode are both connected to the bracket, and the driving component is connected to the bracket and is used to drive the bracket to move along a preset trajectory.

[0013] According to some embodiments of the utility model, the moving module includes a first driving mechanism and a second driving mechanism, the first driving mechanism is installed on the second driving mechanism, the first driving mechanism is used to drive the electrospinning module and the substrate to move relative to each other parallel to the moving surface, and the second driving mechanism is used to drive the nozzle and the substrate to move relative to each other in a direction perpendicular to the moving surface.

[0014] According to some embodiments of the present invention, the working surface includes at least one of a plane, a curved surface, and a stepped surface.

[0015] According to some embodiments of the present invention, in a direction perpendicular to the working surface, the distance between the nozzle and the substrate is greater than the distance between the receiving electrode and the substrate.

[0016] According to some embodiments of the utility model, the nozzle includes an elastic bag, a liquid storage tube and a ventilation tube, the liquid storage tube is used to contain the electrospinning solution, the elastic bag has an air cavity inside, the elastic bag has a retractable inner wall, the inner wall defines a liquid spray port, the liquid spray port is connected to the liquid storage tube, the ventilation tube is connected to the air cavity, and the ventilation tube is used to introduce or extract gas into the air cavity.

[0017] According to some embodiments of the present invention, part of the inner wall of the elastic bag is wrapped around the outside of the liquid storage tube.

[0018] According to some embodiments of the utility model, the liquid storage tube has an annular installation channel, the elastic bag is accommodated in the installation channel, the elastic bag can be expanded and contracted along the inner wall of the installation channel, and part of the elastic bag protrudes to the outside of the installation channel and defines the liquid spray port.

[0019] According to some embodiments of the present invention, the micro-nano controllable electrospinning device also includes a heat source, which is connected to the substrate or relatively independent of the substrate, and is used to heat the working surface.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 A schematic diagram of an embodiment of the micro-nano controllable electrospinning device of the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the coordination between the middle substrate and the electrospinning module;

[0024] Figure 3 for Figure 1 A schematic diagram of an embodiment of a nozzle;

[0025] Figure 4 Schematic diagram of another embodiment of a nozzle.

[0026] Reference numerals:

[0027] Substrate 100, working surface 110; electrospinning module 200, nozzle 210, elastic bag 211, air cavity 2111, liquid injection port 2112, liquid storage tube 212, installation channel 2121, ventilation tube 213, receiving electrode 220; moving module 300, bracket 310, first driving mechanism 320, first part 321, second part 322, driving component 330, second driving mechanism 340, heat source 400; high voltage power supply 500. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Reference Figure 1 and Figure 2 In an embodiment of the utility model, a micro-nano controllable electrospinning device is provided, which includes a substrate 100, an electrospinning module 200 and a moving module 300. The electrospinning module 200 is used to generate micro-nano fibers. The substrate 100 has a working surface 110 for depositing micro-nano fibers. The moving module 300 is used to change the relative position of the substrate 100 and the electrospinning module 200 so that the micro-nano fibers are deposited at different positions on the working surface 110.

[0034] Specifically, the electrospinning module 200 includes a nozzle 210 and a receiving electrode 220. There is an electrostatic field between the nozzle 210 and the receiving electrode 220. The nozzle 210 and the receiving electrode 220 are respectively located on opposite sides of the substrate 100. The substrate 100 is located within the range of the electrostatic field. The nozzle 210 is used to spray the electrospinning solution toward the substrate 100. Under the action of the strong electric field, the droplets generated at the nozzle 210 are conical in shape and extend from the tip of the cone to obtain micro-nano fibers, which are deposited on the working surface 110. The electrospinning module 200 and / or the substrate 100 are connected to the moving module 300, and the moving module 300 drives the electrospinning module 200 and the substrate 100 to move relative to each other along a preset trajectory; the moving path of the electrospinning module 200 and / or the substrate 100 is pre-set in the moving module 300. Under the driving action of the moving module 300, the nozzle 210 and the receiving electrode 220 move synchronously relative to the substrate 100 along the preset trajectory. Under the guidance of the receiving electrode 220, the trajectory of the micro-nano fibers deposited on the substrate 100 is the same as the preset trajectory, thereby forming a microscopic network of micro-nano fibers with directional distribution, which can improve the comprehensive performance of polymer materials and is conducive to the application expansion of electrospinning technology.

[0035] It should be noted that in the present invention, the electrospinning module 200 and / or the substrate 100 continuously moves under the drive of the moving module 300, and a continuous microscopic oriented fiber network can be obtained. In the related art, a plurality of array-arranged electrodes are set to guide the directional arrangement of micro-nano fibers by energizing different electrodes in turn. Affected by parameters such as electrode specifications and arrangement spacing, the fineness of electrode arrangement is limited, and micro-nano fibers are easily interrupted and cannot generate a continuous network; the nozzle 210 and the receiving electrode 220 in the present invention move synchronously relative to the substrate 100, and only one receiving electrode 220 is required to form a continuous oriented micro-nano fiber network, and it is not affected by the fineness of the electrode arrangement, which simplifies the structure of the micro-nano controllable electrospinning device and is more convenient to use.

[0036] It can be understood that the substrate 100 is made of an insulating material that can be penetrated by high voltage electricity, such as glass, so that a stable electrostatic field is formed between the nozzle 210 and the receiving electrode 220, so that the deposition trajectory of the micro-nano fibers is highly consistent with the preset trajectory of the electrospinning module 200 moving relative to the substrate 100.

[0037] The micro-nano controllable electrospinning device further includes a heat source 400, which is connected to the substrate 100 or relatively independent of the substrate 100, and is used to heat the working surface 110 to quickly solidify and form the micro-nano fibers; in some embodiments, the heat source 400 is connected to the substrate 100, and the connection method is not limited to the heat source 400 being attached to the surface of the substrate 100, being built into the interior of the substrate 100, etc. After the heat source 400 is powered on, the working surface 110 of the substrate 100 can be heated; or, as Figure 2 As shown, the heat source 400 is spaced apart from the substrate 100. In this case, the heat source 400 and the substrate 100 are independent of each other. The heat source 400 faces the working surface 110 and heats the working surface 110 by thermal radiation. The high-voltage breakdown performance of the substrate 100 is not affected by the heat source 400, so that the electrostatic field between the nozzle 210 and the receiving electrode 220 is more stable.

[0038] In addition, the arrangement direction of the nozzle 210, the substrate 100 and the receiving electrode 220 is perpendicular to the working surface 110, and the nozzle 210 and the receiving electrode 220 are arranged relative to each other in the arrangement direction, that is, the projection of the center of the nozzle 210 and the center of the receiving electrode 220 on the working surface 110 coincides, so as to improve the correspondence between the nozzle 210 and the receiving electrode 220, and ensure that the micro-nano fibers are deposited along a preset trajectory. A high-voltage power supply 500 can be introduced into the micro-nano controllable electrostatic spinning device, the nozzle 210 is connected to the positive electrode of the high-voltage power supply 500, and the receiving electrode 220 is connected to the negative electrode of the high-voltage power supply 500, so that a strong electrostatic field is formed between the relatively distributed nozzles 210 and the receiving electrode 220.

[0039] The moving module 300 can be configured as a multi-axis module or a manipulator. The moving module 300 can drive the electrospinning module 200 to move independently, so that the electrospinning module 200 moves relative to the substrate 100 along a preset track; or, the moving module 300 drives the substrate 100 to move independently, so that the substrate 100 moves relative to the electrospinning module 200 along a preset track; or, the moving module 300 drives the substrate 100 and the electrospinning module 200 to move simultaneously, so that the two move relative to each other along a preset track.

[0040] Exemplarily, the moving surface is defined to be parallel to the working surface 110, the moving module 300 is connected to the substrate 100, and drives the substrate 100 to move parallel to the moving surface. When the substrate 100 moves, the nozzle 210 and the receiving electrode 220 are in a stationary state, and the nozzle 210 and the receiving electrode 220 move synchronously along a preset track relative to the substrate 100, and the electrostatic spinning solution ejected by the nozzle 210 is deposited on the working surface 110 along the preset track as the substrate 100 moves. Alternatively, the nozzle 210 and the receiving electrode 220 are both connected to the moving module 300, and the moving module 300 drives the nozzle 210 and the receiving electrode 220 to move synchronously along the preset track. When the nozzle 210 and the receiving electrode 220 move, the substrate 100 remains stationary, so that the electrostatic spinning solution ejected by the nozzle 210 is deposited on the working surface 110 along the preset track. Alternatively, the electrospinning module 200 and the substrate 100 are both connected to the moving module 300. Driven by the moving module 300, the electrospinning module 200 and the substrate 100 move toward each other or in the same direction. The electrospinning module 200 and the substrate 100 move relative to each other along a preset trajectory. The electrospinning solution is deposited on the working surface 110 along the preset trajectory to form micro-nano fibers.

[0041] Regarding the way in which the moving module 300 drives the electrospinning module 200 to move, the moving module 300 may be provided with driving mechanisms for driving the nozzle 210 and the receiving electrode 220 respectively; illustratively, the moving module 300 includes a first driving mechanism and a second driving mechanism, the nozzle 210 is connected to the first driving mechanism, the receiving electrode 220 is connected to the second driving mechanism, the first driving mechanism and the second driving mechanism act simultaneously, and synchronously drive the nozzle 210 and the receiving electrode 220 to move. The synchronous driving mode of the first driving mechanism and the second driving mechanism is not limited to that the first driving mechanism and the second driving mechanism are connected through a transmission mechanism, so that only one power component is provided to synchronously drive the nozzle 210 and the receiving electrode 220 to move; for example, the first driving mechanism includes a driving component, such as a motor, etc., the first driving mechanism and the second driving mechanism are connected through a belt, a gear or other structure transmission, when the driving component drives the nozzle 210 to move, through the power transmission of the transmission mechanism, the second driving mechanism synchronously drives the receiving electrode 220 to move, so that the driving component provides power for the movement of the nozzle 210 and the receiving electrode 220 at the same time.

[0042] Regarding the way in which the moving module 300 drives the electrospinning module 200 to move, in another embodiment, the nozzle 210 and the receiving electrode 220 are connected through the bracket 310, so that the positions of the nozzle 210 and the receiving electrode 220 are relatively fixed, and the driving component is connected to the bracket 310, so that the driving component can synchronously drive the nozzle 210 and the receiving electrode 220. Specifically, the moving module 300 includes a first driving mechanism 320, and the first driving mechanism 320 includes a driving component 330 and a bracket 310. The nozzle 210 and the receiving electrode 220 are respectively connected to the two ends of the bracket 310, and the bracket 310 is connected to the driving component 330. The driving component 330 drives the bracket 310 to move along a preset trajectory, so that the nozzle 210 and the receiving electrode 220 move synchronously. It can be understood that the first driving mechanism 320 can simultaneously drive the bracket 310 to move in the x and y directions, or drive the substrate to move in the x and y directions; or, as Figure 1 and Figure 2 The first part 321 of the first driving mechanism 320 drives the bracket 310 to move along the x direction, and the second part 322 drives the substrate to move along the y direction.

[0043] Furthermore, the moving module 300 includes a guiding structure for guiding the movement of the bracket 310, and the guiding structure may be a guide rail; illustratively, the moving module 300 includes a first guide rail and a second guide rail, the extension directions of the first guide rail and the second guide rail are perpendicular, and both are perpendicular to the working surface 110, the second guide rail is slidably connected to the first guide rail, and the bracket 310 is slidably connected to the second guide rail, and the bracket 310 is driven by a driving component so that the bracket 310 can move along the first guide rail and / or the second guide rail.

[0044] Alternatively, the nozzle 210 and the guide rail each have an independent guide structure. Exemplarily, the moving module 300 includes a first guide structure and a second guide structure, and both the first guide structure and the second guide structure can include guide rails in multiple directions. The first guide structure is used to guide the movement of the nozzle 210 in a direction parallel to the working surface 110, and the second guide structure is used to guide the movement of the receiving electrode 220 in a direction parallel to the working surface 110. When the driving component drives the bracket 310 to move, the nozzle 210 and the receiving electrode 220 are guided by the first guide structure and the second guide structure to move along a preset track.

[0045] It can be understood that the driving method of the above-mentioned driving component for the bracket 310, the driving method of the driving component for the substrate 100, and the driving method of the driving component for the nozzle 210 and the receiving electrode 220 are not limited to ball screws, linear motors, belt drives, gear rack drives, etc.

[0046] It should be noted that, refer to Figure 1 , the working surface 110 is defined to be parallel to the xy plane. When the moving module 300 drives the electrospinning module 200 and the substrate 100 to move relative to each other along a preset trajectory parallel to the moving surface, the micro-nano fibers form a two-dimensional oriented network on the working surface 110. In one embodiment of the utility model, the moving module 300 can also drive the nozzle 210 and the substrate 100 to move in a direction perpendicular to the moving surface, that is, the nozzle 210 can also move relative to the substrate 100 along the z-axis to change the distance between the nozzle 210 and the substrate 100; in this way, the relative movement trajectory of the nozzle 210 and the substrate 100 can be pre-set in the x, y, and z directions at the same time, so that the preset trajectory involves the x, y, and z directions, and the structural design of the electrospinning network is realized in a macroscopic manner, and the micro-nano fibers in the electrospinning network are oriented and distributed.

[0047] Specifically, Figure 1 The moving module 300 includes a first driving mechanism 320 and a second driving mechanism 340. The first driving mechanism 320 is installed on the second driving mechanism 340. The first driving mechanism 320 is used to drive the electrospinning module 200 and the substrate 100 to move relative to each other parallel to the working surface 110 (i.e., the xy plane). The second driving mechanism 340 is used to drive the nozzle 210 and the substrate 100 to move relative to each other in a direction perpendicular to the working surface 110 (i.e., the z direction). The nozzle 210 or the substrate 100 has the freedom to move in the x, y, and z directions at the same time. In this way, the micro-nano controllable electrospinning device can form a three-dimensional oriented micro-nano fiber network on the working surface 110 in the form of electrospinning through the movement of the nozzle 210 or the substrate 100 in the x, y, and z directions.

[0048] Furthermore, the working surface 110 may be a plane, a curved surface, an arc, a stepped surface, etc. By driving the electrospinning module 200 and the substrate 100 by the moving module 300, the preset trajectory may involve the x, y, and z directions at the same time. When the working surface 110 is not a plane, the nozzle 210 or the substrate 100 may be driven along the z direction by the moving module 300 to make the micro-nano fiber adapt to the shape of the current working surface 110. The use of the micro-nano controllable electrospinning device is more flexible and can meet a variety of application scenarios.

[0049] In order to make the positioning between the nozzle 210 and the receiving electrode 220 more precise and to make the nozzle 210 as close to the receiving electrode 220 as possible, in one embodiment, in the direction perpendicular to the working surface 110, the distance between the nozzle 210 and the substrate 100 is greater than the distance between the receiving electrode 220 and the substrate 100. On the premise that the micro-nano fibers formed by the electrospinning solution sprayed by the nozzle 210 can be deposited on the working surface 110, the distance between the receiving electrode 220 and the substrate 100 and between the receiving electrode 220 and the nozzle 210 are shortened, so that the receiving electrode 220 can guide the micro-nano fibers more precisely.

[0050] Furthermore, the receiving electrode 220 is arranged to contact the side of the substrate 100 facing away from the nozzle 210, so that the receiving electrode 220 is as close to the substrate 100 as possible, and the accuracy of the receiving electrode 220 in guiding the micro-nano fiber is further improved. It can be understood that in order to reduce the friction between the receiving electrode 220 and the substrate 100 during the relative movement between the two, a smooth coating is arranged on the surface of the substrate 100 facing the receiving electrode 220; in addition, considering the processing and assembly errors, the receiving electrode 220 is in contact with one side of the substrate 100, which means that the receiving electrode 220 is infinitely close to the substrate 100, and a small gap is allowed between the two.

[0051] Reference Figure 3The nozzle 210 further includes an elastic capsule 211, a liquid storage tube 212 and a ventilation tube 213. The liquid storage tube 212 is used to contain the electrospinning solution. The elastic capsule 211 has an air cavity 2111 inside. The elastic capsule 211 has a retractable inner wall, and at least a portion of the inner wall defines a liquid spraying port 2112. The liquid spraying port 2112 is connected to the liquid storage tube 212. The electrospinning solution in the liquid storage tube 212 can be sprayed out through the liquid spraying port 2112; the ventilation tube 213 The tube 213 is connected to the air cavity 2111, and can pass or extract gas into the air cavity 2111. When the vent tube 213 passes gas into the air cavity 2111, the inner wall is stretched inward by the pressure of the gas in the air cavity 2111, and the liquid injection port 2112 is reduced. When the vent tube 213 extracts the gas in the air cavity 2111, the gas pressure in the air cavity 2111 is reduced, and the inner wall of the elastic capsule 211 shrinks, and the liquid injection port 2112 is enlarged. In this way, the liquid injection port 2112 of the nozzle 210 is limited by the inner wall of the elastic capsule 211. By charging and deflating the air cavity 2111 inside the elastic capsule 211, the opening size of the liquid injection port 2112 is adjusted to change the real-time injection amount and injection speed of the nozzle 210, and to achieve variable speed adjustment of the electrospinning solution, thereby changing the micro-nano fiber morphology, so that the micro-nano controllable electrospinning device can be suitable for different usage scenarios.

[0052] In one embodiment, part of the inner wall of the elastic bag 211 is wrapped around the outside of the liquid storage tube 212. Since the elastic bag 211 is flexible, after the elastic bag 211 is wrapped around the outer wall of the liquid storage tube 212, under the action of its own elastic force, the elastic bag 211 has a tendency to shrink and cling to the outer wall of the liquid storage tube 212, so that the elastic bag 211 is fixed to the liquid storage tube 212. In another embodiment, part of the inner wall of the elastic bag 211 is wrapped around the outer wall of the liquid storage tube 212 and bonded to the outer wall of the liquid storage tube 212, so that the elastic bag 211 is fixed more firmly.

[0053] Furthermore, in one embodiment, the liquid storage tube 212 has an annular installation channel 2121, and the elastic capsule 211 is accommodated in the installation channel 2121. When the vent tube 213 is inflated or deflated to the air cavity 2111, the elastic capsule 211 can be extended or contracted along the inner wall of the installation channel 2121, and part of the elastic capsule 211 protrudes to the outside of the installation channel 2121 and defines the liquid injection port 2112; part of the elastic capsule 211 is restricted by the inner wall of the installation channel 2121, and when the air cavity 2111 is inflated or deflated, the elastic capsule 211 can be extended or contracted along the inner wall of the installation channel 2121. It cannot expand or contract, while the portion of the elastic bag 211 that protrudes to the outside of the installation channel 2121 can expand or contract freely. In this way, the air pressure change in the air cavity 2111 drives the expansion and contraction of the elastic bag 2111 to be mainly concentrated on the portion of the elastic bag 211 that protrudes to the outside of the installation channel 2121, and the liquid spray port 2112 is limited by this portion. The opening of the liquid spray port 2112 changes more rapidly and evenly during the process of filling and deflating the air cavity 2111, the shape of the liquid spray port 2112 is more regular, and the generated micro-nano fibers are more stable.

[0054] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A micro-nano controllable electrospinning device, characterized in that: include: A substrate having a working surface for deposition of micro-nano fibers; An electrospinning module, comprising a nozzle and a receiving electrode, wherein the nozzle is used to spray an electrospinning solution toward the substrate, the nozzle and the receiving electrode are respectively located on opposite sides of the substrate, and an electrostatic field is provided between the nozzle and the receiving electrode, so that the electrospinning solution sprayed from the nozzle forms micro-nano fibers and is deposited on the working surface; A moving module, the electrostatic spinning module and / or the substrate is connected to the moving module, and the moving module drives the electrostatic spinning module and the substrate to move relative to each other along a preset track.

2. The micro-nano controllable electrospinning device according to claim 1, characterized in that: A moving surface is defined to be parallel to the working surface, and the moving module is connected to the substrate and drives the substrate to move parallel to the moving surface; And / or, the nozzle and the receiving electrode are both connected to the moving module, and the moving module drives the nozzle and the receiving electrode to move synchronously parallel to the moving surface.

3. The micro-nano controllable electrospinning device according to claim 2, characterized in that: The moving module includes a first driving mechanism, which includes a driving component and a bracket. The nozzle and the receiving electrode are both connected to the bracket. The driving component is connected to the bracket and is used to drive the bracket to move along a preset trajectory.

4. The micro-nano controllable electrospinning device according to claim 2, characterized in that: The moving module includes a first driving mechanism and a second driving mechanism, the first driving mechanism is installed on the second driving mechanism, the first driving mechanism is used to drive the electrospinning module and the substrate to move relative to each other parallel to the moving surface, and the second driving mechanism is used to drive the nozzle and the substrate to move relative to each other in a direction perpendicular to the moving surface.

5. The micro-nano controllable electrospinning device according to claim 1, characterized in that: The working surface includes at least one of a plane, a curved surface, and a stepped surface.

6. The micro-nano controllable electrospinning device according to claim 1, characterized in that: In a direction perpendicular to the working surface, the distance between the shower head and the substrate is greater than the distance between the receiving electrode and the substrate.

7. The micro-nano controllable electrospinning device according to any one of claims 1 to 6, characterized in that: The nozzle includes an elastic bag, a liquid storage tube and a ventilation tube. The liquid storage tube is used to contain the electrospinning solution. The elastic bag has an air cavity inside. The elastic bag has a retractable inner wall. The inner wall defines a liquid spray port. The liquid spray port is connected to the liquid storage tube. The ventilation tube is connected to the air cavity. The ventilation tube is used to introduce or extract gas into the air cavity.

8. The micro-nano controllable electrospinning device according to claim 7, characterized in that: Part of the inner wall of the elastic bag is wrapped around the outside of the liquid storage tube.

9. The micro-nano controllable electrospinning device according to claim 7, characterized in that: The liquid storage tube has an annular installation channel, the elastic bag is accommodated in the installation channel, the elastic bag can be expanded and contracted along the inner wall of the installation channel, and part of the elastic bag protrudes to the outside of the installation channel and defines the liquid spraying port.

10. The micro-nano controllable electrospinning device according to claim 1, characterized in that: The micro-nano controllable electrospinning device also includes a heat source, which is connected to the substrate or relatively independent of the substrate, and is used to heat the working surface.

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