Linear notch type solution self-emission electrostatic spinning device
By using a linear slotted solution self-emission electrospinning device, a uniform jet is generated in the spinning solution tank using conductive elements, which solves the problems of uneven distribution of nanofibers and uneven electrospun film structure, and improves the yield of nanofibers and the uniformity of electrospun films.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN TEXTILE UNIV
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-15
AI Technical Summary
Existing nanofiber electrospinning technology suffers from problems such as uneven distribution of nanofibers in the transverse direction, uneven electrospun film structure, and incomplete reception of the spinning jet, leading to reduced yield.
A linear slotted solution self-emission electrospinning device is used to generate uniformly distributed multiple jets in the open liquid-filled cavity of the spinning solution tank by using conductive elements. The uniform distribution of nanofibers and the increase in yield are achieved by controlling the electric field intensity.
This improves the yield of nanofibers and the structural uniformity of electrospun membranes, avoiding the problems of uneven nanofiber distribution and uneven electrospun membrane thickness caused by uneven electric field strength in existing technologies, and improving the continuity and stability of the spinning process.
Smart Images
Figure CN224243308U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nanofiber preparation technology, and in particular to a linear slotted solution self-emission electrospinning device. Background Technology
[0002] Nanofiber materials, due to their excellent adsorption, separation, and barrier properties, have been widely and deeply applied in fields such as industrial gas-liquid filtration, personal protection, biomedicine, beauty and health, electronic sensing, energy and environment, and national defense and aerospace. Furthermore, they have achieved large-scale / industrial applications in certain areas, such as air and liquid filtration. Electrospinning technology is a relatively simple technique for the mass production of nanofibers, and various types of electrospinning techniques have been applied to the preparation of nanofiber materials in various fields.
[0003] Existing nanofiber electrospinning technologies are mainly divided into two categories based on the electrospinning process mechanism: one is capillary electrospinning, and the other is non-capillary electrospinning. Both types of electrospinning technologies have edge effects, which lead to uneven distribution of nanofibers in the transverse direction and uneven electrospinned film structure (thickness). Furthermore, the spinning jets in the needles on both sides fly to both sides under the action of a strong electric field force. In severe cases, the formed nanofibers cannot be received by the receiving device, resulting in waste of raw materials and reduced yield.
[0004] Therefore, how to improve the yield of nanofibers and the structural uniformity of electrospun membranes is a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0005] In view of this, the purpose of this utility model is to provide a linear slotted solution self-emission electrospinning device to improve the yield of nanofibers and the structural uniformity of electrospun membranes.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A linear slotted solution self-emission electrospinning device, comprising:
[0008] A spinning solution tank is provided with an open filling cavity, which is filled with spinning solution. A conductive element is disposed in the open filling cavity and is capable of conducting with a power source. Based on the conduction state between the conductive element and the power source, the conductive element rapidly injects a large amount of charge into the open filling cavity, thereby generating a uniformly distributed multi-jet stream on the liquid surface at the opening edge of the spinning solution tank.
[0009] Optionally, the above-mentioned linear slotted solution self-emission electrospinning device further includes a shielding shell, which is made of insulating material and has a receiving space, wherein one end of the conductive element for electrical connection with the power supply is located in the receiving space.
[0010] Optionally, in the above-mentioned linear slotted solution self-emission electrospinning device, the open liquid filling cavity is a long strip-shaped cross-section cavity formed by extending along a preset direction;
[0011] The conductive elements are arranged sequentially and evenly along the extension direction of the elongated cross-section cavity, and adjacent conductive electrodes are connected in series.
[0012] Optionally, in the above-mentioned linear slotted solution self-emission electrospinning device, the conductive elements are arranged in at least one row. When the conductive elements are arranged in multiple rows, the multiple rows of conductive elements are symmetrically arranged along the geometric center line of the cross-section of the elongated cross-section cavity.
[0013] Optionally, in the above-mentioned linear slotted solution self-emission electrospinning device, the conductive element includes two opposing first ends and second ends, the first end being one end for electrical connection with a power source, and the second end being disposed facing the outer surface of the spinning solution.
[0014] The cross-sectional area of the first end is greater than the cross-sectional area of the second end.
[0015] Optionally, in the above-mentioned linear slotted solution self-emission electrospinning device, the cross-sectional shape of the open liquid-filling cavity is symmetrical.
[0016] Optionally, the conductive element described above may also include, but is not limited to, other metal components with symmetrical structures, such as linear filaments, linear blades, linear serrations, multi-discs, helical blades, springs or helices, and helical serration structures.
[0017] When using the linear slotted solution self-emission electrospinning device provided by this invention, the conductive element and the power supply are in a conductive state. The conductive element excites a uniformly distributed multi-jet to the outer surface of the spinning solution in the open liquid-filled cavity. The spinning solution forms spinning jets at the edge of its open liquid surface. When the external electric field strength applied by the conductive element to the spinning solution is high, a large number of spinning jets are formed at the edge of the open liquid surface. When the external electric field strength applied by the conductive element to the spinning solution is low, a small number of spinning jets are formed at the edge of the open liquid surface. These jets are then stretched into nanofibers by the electric field force. This improves the uneven distribution of nanofibers and the uneven structure (thickness) of the electrospun film caused by uneven electric field strength. Furthermore, based on the dynamic and continuous switching of adjacent nanofiber spinning points (jet emission sites) with the electric field strength, the uniformity of the distribution of nanofibers is further increased. Unlike the multi-needle electrospinning technology in the prior art, there is no need to compensate for the uniformity of the electrospun film structure by lateral movement of the spinning head.
[0018] Different shapes, array structures, and arrangements of conductive elements can precisely control the magnitude and distribution of the electric field. Therefore, the linear slotted solution self-emission electrospinning device provided by this invention, using conductive elements as the electrospinning head, not only improves the uniformity of nanofiber and electrospun membrane structures, but also effectively increases nanofiber yield through single-row or / multi-row spinning jets. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the structure of an electrostatic spinning head with multiple solid needles in a single row, provided for an embodiment of the present invention, is arranged in a spinning solution tank with a trapezoidal cross-section.
[0021] Figure 2 A schematic diagram of the structure of an electrostatic spinning head with multiple solid needles in two rows arranged in a spinning solution tank with a trapezoidal cross-section, provided for an embodiment of this utility model;
[0022] Figure 3 This is a schematic diagram of the structure of a conductive element provided in an embodiment of the present utility model;
[0023] Figure 4 This is a schematic diagram of another conductive element provided in an embodiment of the present invention;
[0024] Figure 5 This is a schematic diagram of another conductive element provided in an embodiment of the present invention;
[0025] Figure 6 A schematic diagram of the structure of an electrostatic spinning head with a single row of serrations set in a spinning solution tank with a trapezoidal cross-section, provided for an embodiment of this utility model;
[0026] Figure 7 A schematic diagram of the structure of an electrostatic spinning head with double rows of serrations set in a spinning solution tank with a trapezoidal cross-section, provided for an embodiment of this utility model;
[0027] Figure 8 A schematic diagram of the structure of an electrostatic spinning head with a single row of blades set in a spinning solution tank with a trapezoidal cross-section, provided for an embodiment of this utility model;
[0028] Figure 9 This is a schematic diagram of the structure of an electrostatic spinning head with double rows of blades set in a spinning solution tank with a trapezoidal cross-section, according to an embodiment of the present invention.
[0029] Among them, 100 is the spinning solution tank and 200 is the conductive element. Detailed Implementation
[0030] In view of this, the core of this utility model is to provide a linear slotted solution self-emission electrospinning device to improve the yield of nanofibers and the structural uniformity of electrospun membranes.
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] like Figures 1 to 9 As shown in the figure, this utility model embodiment discloses a linear slotted solution self-emission electrospinning device, including a spinning solution tank 100 and a conductive element 200.
[0033] The spinning solution tank 100 is provided with an open filling cavity, which is filled with spinning solution. The conductive element 200 is disposed in the open filling cavity and can be connected to the power source. Based on the connection between the conductive element 200 and the power source, the conductive element 200 excites a uniformly arranged multi-jet stream to the outer surface of the open filling cavity.
[0034] When using the linear slotted solution self-emission electrospinning device provided by this invention, the conductive element 200 is in a conductive state with the power supply. The conductive element 200 excites a uniformly distributed multi-jet to the outer surface of the spinning solution in the open liquid-filled cavity. The spinning solution forms spinning jets at the edge of its open liquid surface. When the external electric field strength applied by the conductive element 200 to the spinning solution is high, a large number of spinning jets are formed at the edge of the open liquid surface. When the external electric field strength applied by the conductive element 200 to the spinning solution is low, a small number of spinning jets are formed at the edge of the open liquid surface. These jets are then stretched into nanofibers by the electric field force, which improves the uneven distribution of nanofibers and the uneven structure (thickness) of the electrospun film caused by the uneven distribution of electric field strength. Furthermore, based on the dynamic and continuous switching of adjacent nanofiber spinning points (jet emission sites) with the electric field strength, the uniformity of the distribution of nanofibers is further increased. Unlike the multi-needle electrospinning technology in the prior art, there is no need to compensate for the uniformity of the electrospun film structure by lateral movement of the spinning head.
[0035] Therefore, it can be seen that the linear slotted solution self-emission electrospinning device provided by this utility model uses a conductive element 200 as the electrospinning head, which not only improves the uniformity of nanofiber and electrospun film structure, but also greatly increases the nanofiber yield by simultaneously exciting a double-layer spinning jet along the length of the spinning solution slot.
[0036] It should be noted that the conductive element 200 and the power supply can be connected by a metal wire, a terminal block, a terminal block, or a combination of any two of the above conductive elements. Any type of part that can enable the conductive element 200 to conduct to the power supply is within the protection scope of this utility model. Optionally, in some embodiments of this utility model, a power interface is provided on the wall of the spinning solution tank 100, and the conductive element 200 is connected to an external high-voltage DC / AC / pulse / (AC+DC) power supply through the power interface via a metal wire.
[0037] Furthermore, the liquid level height of the spinning solution within the open filling cavity is not specifically limited. The spinning solution may or may not completely fill the open filling cavity; any liquid level height that meets the requirements for the spinning solution level falls within the protection scope of this utility model. Simultaneously, the conductive electrode may protrude from the outer surface of the spinning solution, be located below the outer surface of the spinning solution, or be flush with the outer surface of the spinning solution. This utility model does not specifically limit the relative relationship between the height of the conductive electrode and the height of the outer surface of the spinning solution; any arrangement that meets the spinning requirements falls within the protection scope of this utility model.
[0038] Furthermore, the aforementioned linear slotted solution self-emission electrospinning device also includes a shielding shell. The shielding shell is made of insulating material and has a receiving space. One end of the conductive element 200 used for electrical connection with the power supply is located in the receiving space. When using a metal wire to connect the conductive element 200 and the power supply, the end of the conductive element 200 near the metal wire and the metal wire connected to the conductive element 200 are both located in the receiving space of the shielding shell to prevent the conductive element 200 and the metal wire from interfering with the electric field strength and affecting the uniformity of the electric field strength distribution.
[0039] It should be understood that the above-mentioned insulating materials include, but are not limited to, non / micro-polar polymer materials, resins, ceramics, glass, wood or their composite materials and coatings. Any material that can meet the insulation requirements is within the protection scope of this utility model. Furthermore, this utility model does not specifically limit the shape of the shielding shell. Any shape that can shield the tail end of the metal wire and conductive element 200 in its accommodating space is within the protection scope of this utility model.
[0040] In addition, the cross-sectional shape of the above-mentioned open liquid-filled cavity in the horizontal plane can be elongated, circular or polygonal, etc. Any shape that can meet the usage requirements is within the protection scope of this utility model.
[0041] Optionally, in a specific embodiment of this utility model, the open liquid filling cavity is a long strip-shaped cross-section cavity formed by extending along a preset direction; wherein, multiple conductive elements 200 are arranged sequentially and evenly distributed along the extension direction of the long strip-shaped cross-section cavity, and after adjacent conductive electrodes are connected in series, they are led out from the power supply structure in the middle position of the tank wall on both sides of the spinning liquid tank 100 and connected to an external high voltage DC / AC / pulse / (AC+DC) power supply.
[0042] The conductive element 200 provided by this utility model is made of metal, including but not limited to silver, copper, iron, zinc, tin, steel, chromium, and manganese, which will not be listed here. In addition, the conductive element 200 includes, but is not limited to, at least one row of linearly arranged metal needles, serrations, blades, fine metal wires, metal rods, fine metal springs, series of multi-discs, spiral sheets, brush rollers, spirally arranged metal needles, spirally arranged serrations, and other similar structures. As long as the conductive element is made of metal and has a symmetrical structure, regardless of whether it has a protruding tip, as long as the conductive element is located below or flush with the spinning liquid, it is within the protection scope of this utility model. Furthermore, the conductive element 200 can move within a certain range below the spinning liquid, such as by translation or rotation, to stimulate the spinning liquid surface to continuously generate more spinning jets. In addition, an ultrasonic transducer can be added in the spinning liquid tank below the spinning liquid surface to help induce the spinning liquid surface to more easily generate spinning jets.
[0043] Meanwhile, the cross-sectional shape of the open filling cavity of the above-mentioned spinning solution tank 100 can be trapezoidal, square, rectangular, isosceles triangle, or any straight or curved structure symmetrical about the geometric center line of the cross section. As long as the symmetrical structure can meet the usage requirements, it is within the protection scope of this utility model. Furthermore, the material of the spinning solution tank 100 can be metal, resin, glass, ceramic, wood, or its composite coating material. As long as the material can meet the usage requirements, it is within the protection scope of this utility model.
[0044] Furthermore, the conductive elements 200 provided by this utility model are arranged in at least one row, such as... Figure 1 As shown, in a specific embodiment of this utility model, the conductive element 200 consists of a plurality of solid needles arranged in a row along the length of the spinning solution tank 100, and the cross-section of the open filling cavity of the spinning solution tank 100 is trapezoidal; as shown Figure 6 As shown, in another specific embodiment of this utility model, the conductive element 200 is a single-row serrated structure arranged along the length direction of the spinning solution tank 100, and the cross-section of the open filling cavity of the spinning solution tank 100 is trapezoidal; as shown Figure 8 As shown, in another specific embodiment of this utility model, the conductive element 200 is a single-row blade structure extending along the length direction of the spinning solution tank 100, and the cross-section of the open liquid filling cavity of the spinning solution tank 100 is trapezoidal.
[0045] The conductive element 200 provided by this utility model can be arranged in a row, but is not limited to a row. It can also be arranged in multiple rows. When the conductive element 200 is arranged in multiple rows, the multiple rows of conductive elements 200 are symmetrically arranged along the geometric center line of the cross-section of the elongated cross-section cavity to form a multilayer linear arrangement of countless spinning jets. This makes the electric field strength and nanofibers uniformly distributed along the length direction of the spinning liquid tank 100, further improving the uniformity of the nanofibers and electrospun membrane structure.
[0046] Preferably, when the conductive elements 200 are arranged in a double row, based on the preferred structural parameters of the conductive elements 200, the conductive elements can generate dense and uniformly distributed double-row multi-jet streams along the length direction on the spinning liquid surface, resulting in high nanofiber yield, uniform product structure, and continuous, stable, safe, and high-yield spinning process.
[0047] For example, such as Figure 2 As shown, in a specific embodiment of this utility model, the conductive element 200 is a double row of solid needles arranged along the length of the spinning solution tank 100, and the cross-section of the open filling cavity of the spinning solution tank 100 is trapezoidal; as Figure 7 As shown, in another specific embodiment of this utility model, the conductive element 200 is a double-row sawtooth structure arranged along the length direction of the spinning solution tank 100, and the cross-section of the open filling cavity of the spinning solution tank 100 is trapezoidal; as shown Figure 9 As shown, in another specific embodiment of this utility model, the conductive element 200 is a double-row blade structure extending along the length direction of the spinning liquid tank 100. The cross-section of the open liquid-filled cavity of the spinning liquid tank 100 is trapezoidal to form a double-layer linearly arranged countless spinning jets, so that the electric field strength and nanofibers are evenly distributed along the length direction of the spinning liquid tank 100.
[0048] It should be understood that this utility model does not specifically limit the type of spinning solution involved. In practical applications, the type of spinning solution can be adapted to meet actual needs. Any type of spinning solution that can meet the usage requirements falls within the protection scope of this utility model.
[0049] In addition, the conductive element 200 includes two opposing first ends and second ends. The first end is used for electrical connection with a power source, and the second end is disposed facing the outer surface of the spinning solution. The cross-sectional area of the first end is larger than that of the second end, so that the second end of the conductive element 200 has a pointed structure compared to its first end, and the second end can release more charge during the spinning process.
[0050] like Figure 3 As shown, the conductive element 200 is a solid needle structure with a tapered tip at the second end, such as... Figure 4 As shown, the conductive element 200 is a solid needle structure with a truncated cone tip at the second end, such as... Figure 5 As shown, the conductive element 200 is a solid needle structure with a polygonal pyramidal tip at the second end.
[0051] The linear slotted solution self-emission electrospinning device provided by this utility model also includes a feeding mechanism connected to an open liquid filling chamber. The feeding mechanism supplies spinning solution to the open liquid filling chamber based on the siphon principle, which has the advantages of controllable and safe feeding rate, uniform nanofiber fineness, and uniform electrospun membrane (nanofiber material) structure.
[0052] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units may include steps or units not listed, but rather not listed.
[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A linear slotted solution self-emission electrospinning device, characterized in that, include: The spinning solution tank is provided with an open filling cavity, which is filled with spinning solution. A conductive element is disposed in the open liquid-filled cavity, and the conductive element is capable of conducting with a power source. Based on the conduction state between the conductive element and the power source, the conductive element rapidly injects a large amount of charge into the open liquid-filled cavity, thereby generating a uniformly distributed multi-jet stream on the liquid surface at the opening edge of the spinning solution tank.
2. The linear slotted solution self-emission electrospinning device according to claim 1, characterized in that, It also includes a shielding housing, which is made of insulating material and has a receiving space, wherein one end of the conductive element for electrical connection with the power supply is located in the receiving space.
3. The linear slotted solution self-emission electrospinning device according to claim 1, characterized in that, The open-type liquid-filled cavity is a long strip-shaped cross-section cavity formed by extending along a preset direction; The conductive elements are arranged sequentially and evenly along the extension direction of the elongated cross-section cavity, and adjacent conductive elements are connected in series.
4. The linear slotted solution self-emission electrospinning device according to claim 3, characterized in that, The conductive elements are arranged in at least one row. When the conductive elements are arranged in multiple rows, the multiple rows of conductive elements are symmetrically arranged along the geometric center line of the cross-section of the elongated cross-section cavity.
5. The linear slotted solution self-emission electrospinning device according to claim 1, characterized in that, The conductive element includes two opposing first ends and second ends. The first end is used for electrical connection with a power source, and the second end is disposed facing the outer surface of the spinning solution. The cross-sectional area of the first end is greater than the cross-sectional area of the second end.
6. The linear slotted solution self-emission electrospinning apparatus according to claim 1, characterized in that, The cross-sectional shape of the open liquid-filled cavity is symmetrical.
7. The linear slotted solution self-emission electrospinning device according to claim 1, characterized in that, The conductive element includes a metal component with a symmetrical structure.
8. The linear slotted solution self-emission electrospinning apparatus according to claim 1, characterized in that, The cross-sectional shape of the linear slot is symmetrical about a geometric center line parallel to the vertical direction.