Adjustable electrostatic spinning device

Abstract

An adjustable electrostatic spinning device comprises a receiving table, a drawer type conducting layer is slidably connected into the receiving table, a receiving container corresponding to the conducting layer is arranged above the receiving table, and a rack is installed on one side of the receiving container and located above the receiving table. The tail end of the machine frame is connected with a needle head support located above the interior of the receiving container, a needle head is installed on the needle head support and connected with the high-voltage end of a high-voltage power source, and the conducting layer is externally connected to a ground wire of the high-voltage power source to form a closed loop; through space design, electrostatic spinning can be carried out in a solution environment, a needle head is arranged in a solution of a receiving container, spinning in the solution environment is achieved under the action of electrostatic field force, and it is guaranteed that fibers are stably and fully stretched in the solution environment; the device can effectively improve the splashing condition on the surface of the needle fiber, ensures that the position of the needle can be adjusted at multiple angles, and has the characteristic of concentrated and stable spinning.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrostatic spinning, and in particular relates to an adjustable electrostatic spinning device. Background Art

[0002] With the development of nanotechnology, electrospinning, as a simple and effective new processing technology for producing nanofibers, will play a huge role in many fields such as biomedical materials, filtration and protection, catalysis, energy, optoelectronics, food engineering, cosmetics, etc.

[0003] While spinning technology is becoming increasingly sophisticated, the receiving devices of spinning equipment still use rollers and flat plates, and high voltage or ground wires are directly connected to their surfaces; the receiving area of ​​the roller is small under the same volume; the flat plate receiving is prone to uneven film thickness. Existing electrospinning equipment is mostly used in laboratories and cannot meet the needs of mass production. Although a small number of conveyor belts have been used as spinning receiving devices, the receiving device placed under the nozzle is easily contaminated by dripping and splashing during the spinning process, affecting the appearance and quality of the film. In addition, when the conveyor belt receiving device with a general grounding method is cyclically spun to a certain thickness, it is easy for the fibers to "float randomly" and the receiving is not concentrated. In addition, most general conveyor belt receiving devices are fixed and cannot be adjusted, which is inconvenient to operate. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide an adjustable electrospinning device, which changes the traditional spinning environment, and makes the frame and the needle holder adjustably connected. The needle is installed on the needle clamp. The spatial relationship and connection method between the needle, the receiving container and the receiving platform can effectively improve the splashing situation on the needle fiber surface, ensure that the needle position can be adjusted at multiple angles, and has the characteristics of centralized and stable spinning. The utility model ensures the tensile properties of the fiber and improves the quality of the fiber membrane.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An adjustable electrospinning device includes a receiving platform 200, wherein a drawer-type conductive layer 300 is slidably connected inside the receiving platform 200, a receiving container 500 corresponding to the conductive layer 300 is arranged above the receiving platform 200, a frame 100 is installed on one side of the receiving container 500 and above the receiving platform 200, the end of the frame 100 is connected to a needle holder 400 located above the inside of the receiving container 500, a needle 403 is installed on the needle holder 400, the needle 403 is connected to the high voltage end of a high voltage power supply 600, and the conductive layer 300 is externally connected to the ground wire of the high voltage power supply 600 to form a closed loop.

[0007] The frame 100 includes a support rod 101 vertically arranged above the receiving platform 200, and the support rod 101 is vertically and slidably connected to the sliding rod 102; the needle bracket 400 includes a needle clamp fixing rod 401 vertically and slidably connected to the sliding rod 102, and the bottom end of the needle clamp fixing rod 401 is slidably connected to the needle clamp 402, and a needle 403 is installed on the needle clamp 402.

[0008] The materials of the frame 100 and the receiving platform 200 are both polytetrafluoroethylene.

[0009] The conductive layer 300 is provided with a conductive material, wherein the conductive material includes a receiving aluminum foil layer or a copper foil layer or a conductive glass or a silicon wafer.

[0010] The receiving container 500 is made of insulating material.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) The utility model connects the needle holder 400 with the frame 100 by sliding, and sets the needle 403 in the needle clamp 402 of the needle holder 400. This structure can ensure that the needle 403 is partially connected to the liquid in the receiving container 500, and effectively improve the splashing of the needle 403 on the fiber surface, thereby improving the quality of the fiber membrane. In addition, a drawer-type conductive layer 300 with built-in conductive material is installed in the receiving platform 200. The sliding rod 102 is perpendicular to and slidably connected to the needle clamp fixing rod 401, so that it is convenient to adjust the position of the needle 403 through the frame 100, and adjust the distance and angle between the needle 403 and the solution in the receiving container 500, so as to facilitate the control of the diameter of the spun fiber and meet the needs of products with different fiber diameters.

[0013] (2) The utility model changes the traditional spinning environment and designs a receiving container 500 to realize fiber collection in a liquid environment, which makes it easier to achieve a centralized and stable spinning environment and ensure the tensile stability of the fiber in the electrostatic field force. In addition, it ensures that the collected fibers can be transferred and stored in receiving containers 500 of different sizes, thereby realizing the control of the fiber membrane morphology.

[0014] (3) The receiving devices of existing medium and large electrospinning equipment are all set inside the machine, which is extremely inconvenient to operate and easily causes safety accidents. The utility model is provided with a conductive layer 300, and the size of the conductive layer 300 can be flexibly adjusted by conveniently pulling out a drawer, which is further conducive to the stretching and centralized collection of fibers. In addition, the frame 100 and the receiving platform 200 are made of polytetrafluoroethylene material, which avoids the corrosion damage to the equipment caused by the acidity and alkalinity of the spinning solution, and at the same time avoids the short circuit between the two ends of the high-voltage power supply 600, that is, the needle 403 and the conductive layer 300, to ensure the safe use of the equipment.

[0015] In summary, on the one hand, the utility model is established in the electrostatic field under the liquid environment, replacing the spinning environment under the traditional air atmosphere, and the device makes the preparation of fibers more stable and safe; on the other hand, the liquid can be reused as a collection liquid to achieve green production, which is in line with the concept of environmental protection. At the same time, under the action of the liquid environment and the electrostatic field, the electrostatic spinning solution filamentation conditions are effectively reduced. In addition, the stretching of the spun fibers can be enhanced, the jet port can be kept unobstructed, and splashing can be avoided, making the spinning process more stable, effectively improving the spinning efficiency, and effectively improving the quality of the finished fiber spinning products. In addition, through the device, the collected spun fibers can be collected in different containers, and have extremely strong plasticity; the utility model is used to improve the spinning efficiency of hydrophobic or organic solvent-repellent fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the specific structure of the frame 100 and the needle support 400 of the utility model.

[0018] Among them, 100, rack; 200, receiving platform; 300, conductive layer; 400, needle holder; 500, receiving container; 600, high voltage power supply; 101, support rod; 102, sliding rod; 401, needle clamp fixing rod; 402, needle clamp; 403, needle. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model aims to propose an adjustable electrostatic spinning device in view of the problems that the membrane received by the existing receiving device during the spinning process is easily contaminated by dripping and splashing, which affects the quality and the existing receiving device has great limitations in use.

[0021] See also Figure 1This embodiment is an adjustable electrospinning device, which includes a frame 100, a receiving platform 200, a conductive layer 300, a needle holder 400, a receiving container 500 and a high-voltage power supply 600. The frame 100 is mechanically connected to the receiving platform 200, the conductive layer 300 is built into the receiving platform 200 in a drawer-like sliding manner, the conductive layer 300 contains conductive aluminum foil, and the aluminum foil is externally connected to the ground wire of the high-voltage power supply 600, and the needle 403 is connected to the high-voltage end of the high-voltage power supply 600 to form a closed loop.

[0022] See also Figure 2 , the frame 100 shown includes a support rod 101 and a sliding rod 102, and the needle bracket 400 includes a needle clamp fixing rod 401, a needle clamp 402 and a needle 403. The support rod 101 and the sliding rod 102 are mechanically connected (slidably adjustable), one end of the sliding rod 102 can be slidably connected to the support rod 101 up and down, the needle clamp fixing rod 401 and the sliding rod 102 are mechanically connected (slidably adjustable), the needle clamp fixing rod 401 and the needle clamp 402 bracket are mechanically connected (slidably adjustable), and the needle 403 is mechanically connected to the needle clamp 402.

[0023] The structural design of the utility model ensures that the position of the needle 403 can be adjusted at multiple angles such as up, down, left, right, front and back through the vertical and sliding connection between the support rod 101 and the sliding rod 102 in the frame 100, the vertical and sliding connection between the sliding rod 102 and the needle clamp fixing rod 401, and the sliding connection between the bottom end of the needle clamp fixing rod 401 and the needle clamp 402, so as to adapt to the size requirements of the receiving container 500, and ensure that the needle 403 is built into the solution in the receiving container 500, so that the spinning environment is stable, the spinning solution is stretched into a jet under the action of the electrostatic field force of the liquid environment, the jet gradually forms nanofibers and is flushed and deposited to the bottom of the container with the solution in the receiving container 500, thereby obtaining nanofibers with stable form.

[0024] In some embodiments, the materials of the rack 100 and the receiving platform 200 are both polytetrafluoroethylene. When the needle 403 and the conductive layer 300 are respectively connected to the high-voltage power supply 600, the rack 100 and the receiving platform 200 can avoid short circuits caused by high-voltage conduction, ensuring safe operation. The materials used in the rack 100 and the receiving platform 200 are resistant to acid, alkali, and various organic solvents, ensuring that they are not affected by the properties of the spinning solution in actual application, avoiding damage to the equipment during the spinning process.

[0025] In some embodiments, the receiving container 500 may be made of insulating materials such as quartz in addition to a glass container, and the size may be flexibly adjusted by the operator according to needs.

[0026] In some embodiments, a conductive material is laid on the conductive layer 300 , and the conductive material is an aluminum foil layer, and may also be replaced by a copper foil layer or other conductive materials such as conductive glass or silicon wafer.

[0027] In some embodiments, the conductive layer 300 is provided with aluminum foil at an equal or substantially equal distance from the receiving surface of the receiving platform 200. Thus, the jet is stretched under the same conditions as much as possible, thereby improving the distribution uniformity of the diameter of the nanofiber and the uniformity of the morphological structure. Of course, in other embodiments, the conductive layer 300 can be provided with aluminum foils of different sizes, and the stretching surface of the receiving surface of the receiving platform 200 is not equal. It is more convenient to clean, clean, debug, replace parts, etc. of the conductive layer 300 of the drawer-type sliding connection from the side.

[0028] The working principle of the utility model is:

[0029] The space design allows electrospinning to be performed in a solution environment. The support rod 101 of the frame 100 is vertically and slidably connected to the sliding rod 102, the sliding rod 102 is vertically and slidably connected to the needle clamp fixing rod 401, and the bottom end of the needle clamp fixing rod 401 is slidably connected to the needle clamp 402, so that the spatial position of the needle 400 in the spinning device can be flexibly adjusted, and the needle 400 is built into the solution of the receiving container 500, and the solution environment spinning is realized under the action of the electrostatic field force, ensuring that the fiber is stably and fully stretched in the solution environment. The size and material design of the receiving container 500 can simply obtain a fiber membrane with controllable structure. In addition, the collected liquid in the receiving container 500 can be reused to achieve green production.

[0030] Those skilled in the art should understand that what is disclosed above is only an implementation method of the utility model, and it certainly cannot be used to limit the scope of rights for patent protection requested for the utility model. Equivalent changes made according to the implementation method of the utility model are still within the scope covered by the claims of the utility model.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. An adjustable electrospinning device, characterized in that: The invention comprises a receiving platform (200), wherein a drawer-type conductive layer (300) is slidably connected inside the receiving platform (200), a receiving container (500) corresponding to the conductive layer (300) is arranged above the receiving platform (200), a frame (100) is installed on one side of the receiving container (500) and above the receiving platform (200), the end of the frame (100) is connected to a needle holder (400) located above the inside of the receiving container (500), a needle (403) is installed on the needle holder (400), the needle (403) is connected to the high voltage end of a high voltage power supply (600), and the conductive layer (300) is externally connected to the ground wire of the high voltage power supply (600), so as to form a closed loop.

2. An adjustable electrospinning device according to claim 1, characterized in that: The frame (100) includes a support rod (101) vertically arranged above the receiving platform (200), and the support rod (101) is vertically and slidably connected to the sliding rod (102); the needle support (400) includes a needle clamp fixing rod (401) vertically and slidably connected to the sliding rod (102), the bottom end of the needle clamp fixing rod (401) is slidably connected to the needle clamp (402), and a needle (403) is installed on the needle clamp (402).

3. An adjustable electrospinning device according to claim 1 or 2, characterized in that: The materials of the frame (100) and the receiving platform (200) are both polytetrafluoroethylene.

4. The adjustable electrospinning device according to claim 1, characterized in that: The conductive layer (300) is provided with a conductive material, the conductive material comprising a receiving aluminum foil layer or a copper foil layer or a conductive glass or a silicon wafer.

5. The adjustable electrospinning device according to claim 1, characterized in that: The receiving container (500) is made of insulating material.

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