An electrospinning composite nozzle

Abstract

The present invention relates to the field of electrospinning, and discloses an electrospinning composite nozzle, which includes a nozzle substrate and a plurality of dispensing needles. The nozzle substrate is provided with a plurality of spinning through holes arranged in an array. One end of each spinning through hole is equipped with a quick connector, and the other end is equipped with a Luer connector. The number of dispensing needles is less than or equal to the number of Luer connectors. Each dispensing needle is detachably connected to at least one Luer connector. The plurality of dispensing needles are arranged in an array. An air flow cavity is provided inside the nozzle substrate, an air flow inlet communicating with the air flow cavity is provided on the side surface of the nozzle substrate, and air flow outlets are provided around the Luer connectors on the nozzle substrate. The present invention can flexibly adjust the positions of the dispensing needles, and the air flow outlets effectively suppress the electric field interference between the dispensing needles in the array, ensuring the smooth progress of electrospinning.

Description

Technical Field

[0001] The present invention relates to the field of electrospinning, in particular to an electrospinning composite nozzle. Background Art

[0002] Electrospinning technology is the mainstream technology for manufacturing nanofibers, which has the advantages of low cost, wide raw materials, and simple equipment. The produced nanofiber membrane has the characteristics of high porosity, large specific surface area, and excellent mechanical properties, and has broad application and development prospects in the fields of environmental treatment, biomedicine, power batteries, etc. Existing electrospinning equipment is mostly of the nozzle type and needleless type. Among them, the needleless type has a faster spinning efficiency but has disadvantages such as it is difficult to control the fiber diameter evenly. The nozzle type is divided into single-needle nozzles and multi-needle nozzles. Single-needle nozzles are mostly used for experiments and small-scale test production, and multi-needle nozzles are mainly used in industrial production.

[0003] Existing multi-needle nozzle technology, such as an arc array electrospinning nozzle proposed in a patent document with the publication number of CN1092671608A, is provided with an upper cover plate, a needle mounting plate, a conductive plate, a support plate, a needle array, and an air hood; the upper cover plate is provided with a liquid inlet hole and is connected to a liquid supply device; the needle mounting plate is a stepped structure, and the height difference of the stepped structure is consistent with the height difference of the corresponding needles; the conductive plate is connected to the positive pole of a high-voltage power supply; the support plate cooperates with the conductive plate, and the support plate is provided with a support plate through hole, which is coaxially distributed with the hole on the conductive plate and has the same size; the needle array is provided with needles arranged in an arc array; the air hood is provided with two air inlet holes, and the air hood is connected to an air supply device through a gas pipe. It can reduce the electric field inhibition interference between multiple jets of the electrospinning multi-jet nozzle and the electrostatic interference between multiple jets, improve the multi-jet density and spraying stability, improve the deposition efficiency of electrospun nanofibers, and realize the rapid formation of a large-area uniform nanofiber membrane.

[0004] However, the above scheme has a single function. Most existing multi-needle nozzles supply liquid uniformly to all needles as in the above scheme, and all needles are arranged and installed fixedly, which cannot meet the different needle arrangements and needle types required for electrospinning different materials. Moreover, the needles are installed inside the nozzle, making it inconvenient to replace, clean, and disassemble. Summary of the Invention

[0005] Therefore, it is necessary to provide an electrospinning composite nozzle to solve the problem that the existing needle arrangement method cannot be flexibly adjusted to use electrospinning with multiple materials.

[0006] To achieve the above-mentioned objectives, the present invention provides an electrospinning composite nozzle, comprising a nozzle substrate and a plurality of dispensing needles, wherein the nozzle substrate is provided with a plurality of spinning through holes arranged in an array, a quick connector is installed at one end of the spinning through hole, and a Luer connector is installed at the other end of the spinning through hole, the number of the dispensing needles is less than or equal to the number of Luer connectors, each of the dispensing needles is detachably connected to at least one Luer connector, and the plurality of dispensing needles are arranged in an array, an air flow cavity is provided inside the nozzle substrate, an air flow inlet connected to the air flow cavity is provided on the side of the nozzle substrate, and an air flow outlet is provided on the nozzle substrate around the Luer connector.

[0007] Furthermore, each Luer connector is surrounded by four elongated airflow outlets and four circular airflow outlets. The four elongated airflow outlets enclose a square area, with the Luer connector located within the directional area and the four circular airflow outlets located at the four corners of the directional area. The elongated airflow outlets do not completely separate the square area, but the corners of the square area are separated by the circular airflow outlets. This allows the airflow outlets to completely separate the dispensing needle when it ejects air.

[0008] Furthermore, two adjacent square areas share the airflow outlet therebetween, which reduces the opening area of the bottom surface of the showerhead substrate and ensures the flow rate of the airflow at the airflow outlet.

[0009] Furthermore, the airflow outlets are distributed in a grid pattern on the bottom surface of the nozzle base plate, with each Luer connector located in the middle of each grid. The airflow outlets completely isolate the Luer connector from surrounding areas, effectively isolating the dispensing needles and preventing adjacent dispensing needles from contacting each other.

[0010] Furthermore, each of the Luer connectors is provided with an annular airflow outlet, which is in the shape of a circular ring, thereby fully ensuring the airflow isolation effect between adjacent dispensing needles.

[0011] Furthermore, the Luer connector includes a connecting head, a connecting inner tube and a protective outer tube, the connecting inner tube and the protective outer tube are coaxially arranged on the connecting head, the connecting head is threadedly connected to the spinning through hole, a first connecting seat is fixed on the dispensing needle, the connecting inner tube is inserted into the first connecting seat, and the protective outer tube extends downward beyond the top of the first connecting seat.

[0012] The arrangement of connecting the inner cylinder and the first connecting seat facilitates the quick connection of the dispensing needle and the Luer connector, while the protective outer cylinder plays a certain protective role on the connection between the inner cylinder and the first connecting seat.

[0013] Further, the dispensing needle head is a coaxial needle head. The coaxial needle head includes an inner shaft channel and an outer shaft channel. A second connection seat is provided on the dispensing needle head. The first connection seat communicates with the inner shaft channel of the coaxial needle head, and the second connection seat communicates with the outer shaft channel of the coaxial needle head. The first connection seat and the second connection seat are respectively connected to two adjacent Luer connectors. The coaxial needle head can be used to prepare core-shell structured electrospun fibers. The first connection seat and the second connection seat have the same structure and are both connected to the connection inner cylinder of the Luer connector.

[0014] Further, the spinning through holes on the nozzle substrate are arranged in a rectangular or circular array. The nozzle substrate selects different arrangements according to the needs of different electrospinning.

[0015] Further, the nozzle substrate is a rectangular plate. The multiple spinning through holes on the nozzle substrate are arranged in a rectangle, and the Luer connectors are arranged in a corresponding rectangle. The arrangement of the multiple dispensing needle heads is as follows: multiple groups of arrangements are repeated. Each group includes two columns. The two columns in the same group are arranged in a reverse and staggered manner. At most two dispensing needle heads are continuously arranged in each column. There is a column of Luer connectors spaced between adjacent groups.

[0016] The above technical solutions have the following beneficial effects:

[0017] In the present invention, multiple dispensing needle heads can be quickly installed with Luer connectors, and the arrangement of the dispensing needle heads can be adjusted arbitrarily. When in use, the quick connectors connecting the dispensing needle heads are connected to an external spinning solution, so as to perform electrospinning with various needle head arrangements. Furthermore, electrospinning with various materials can be flexibly used. The Luer connectors and the dispensing needle heads are detachably connected, which is convenient for cleaning the needle heads. The air flow outlet is downward. When the dispensing needle heads perform electrospinning, the air flow outlet ejects an air flow, which effectively suppresses the electric field interference between the dispensing needle heads in the dispensing needle head array, enhances the stability of the electrospinning jet, and improves the deposition efficiency of electrospun nanofibers. Description of the Drawings

[0018] Figure 1 Structural diagram of the electrospinning composite nozzle for Example 1;

[0019] Figure 2 Structural diagram of the electrospinning composite nozzle for Example 1;

[0020] Figure 3 Side structural diagram of the electrospinning composite nozzle for Example 1;

[0021] Figure 4 For the electrospinning composite nozzle for Example 1 along Figure 3 Cross-sectional structural diagram along line A-A;

[0022] Figure 5 Top view structural diagram of the electrospinning composite nozzle for Example 1;

[0023] Figure 6 The cross-sectional structure diagram of the electrospinning composite nozzle along the Figure 5 B-B line described in Example 1;

[0024] Figure 7 The cross-sectional structure diagram of the nozzle substrate of the electrospinning composite nozzle described in another embodiment;

[0025] Figure 8 The cross-sectional structure diagram of the nozzle substrate of the electrospinning composite nozzle described in another embodiment;

[0026] Figure 9 The structure diagram of the electrospinning composite nozzle described in Example 2;

[0027] Figure 10 The cross-sectional structure diagram of the electrospinning composite nozzle described in Example 2;

[0028] Figure 11 The structure diagram of the electrospinning composite nozzle described in Example 3;

[0029] Explanation of reference numerals:

[0030] 1. Nozzle substrate; 11. Spinning through-hole; 12. Air flow chamber; 13. Air flow inlet; 14. Air flow outlet;

[0031] 2. Dispensing needle; 21. First connecting seat; 22. Inner shaft channel; 23. Outer shaft channel; 24. Second connecting seat;

[0032] 3. Quick connector;

[0033] 4. Luer connector; 41. Connector; 42. Connecting inner cylinder; 43. Protective outer cylinder. Detailed implementation manners

[0034] To describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following is a detailed description in combination with specific embodiments and with reference to the accompanying drawings.

[0035] Example 1

[0036] Please refer to Figures 1-6The present embodiment discloses an electrospinning composite nozzle, comprising a nozzle substrate 1 and a plurality of dispensing needles 2. The nozzle substrate 1 is provided with a plurality of spinning through holes 11 arranged in an array, a quick connector 3 is installed at one end of the spinning through hole 11, and a Luer connector 4 is installed at the other end of the spinning through hole 11. The number of dispensing needles 2 is less than or equal to the number of Luer connectors 4, and each dispensing needle 2 is detachably connected to at least one Luer connector 4. The plurality of dispensing needles 2 are arranged in an array, an air flow cavity 12 is provided inside the nozzle substrate 1, an air flow inlet 13 connected to the air flow cavity 12 is provided on the side of the nozzle substrate 1, and an air flow outlet 14 is provided on the nozzle substrate 1 around the Luer connector 4.

[0037] In this embodiment, the spinning hole 11 is an M4 threaded hole, and the quick connector 3 and the Luer connector 4 are threadedly connected to the spinning hole 11. When in use, the quick connector 3 is connected to the external electrospinning solution through a hose, and the air flow inlet 13 is connected to the external air pump through a hose.

[0038] Each Luer connector 4 is surrounded by four long strip air flow outlets 14 and four circular air flow outlets 14. The four long strip air flow outlets 14 enclose a square area. The Luer connector 4 is located in the directional area. The four circular air flow outlets 14 are respectively located at the four corners of the directional area. Two adjacent square areas share the air flow outlet 14 between them.

[0039] The elongated airflow outlets 14 do not completely separate the square area; instead, the corners of the square area are separated by the circular airflow outlets 14. This allows the airflow outlets 14 to completely separate the dispensing needles 2 when the airflow is ejected. Sharing the airflow outlets 14 reduces the opening area on the bottom surface of the nozzle substrate 1, ensuring the flow rate of the airflow from the airflow outlets 14.

[0040] like Figure 7 In another embodiment, the airflow outlets 14 are arranged in a grid pattern on the bottom surface of the nozzle base plate 1, with each Luer connector 4 located in the center of each grid. The airflow outlets 14 completely isolate the area surrounding the Luer connector 4, effectively isolating the dispensing needles 2 and preventing adjacent dispensing needles 2 from interfering with each other.

[0041] like Figure 8 In another embodiment, an annular airflow outlet 14 is provided around each Luer connector 4. The airflow outlet 14 is annular, which fully ensures the isolation effect of the airflow isolation between adjacent dispensing needles 2.

[0042] In the above two embodiments, in order to ensure the air pressure and flow rate of the air flow outlet 14, the four sides of the nozzle substrate 1 can be simultaneously provided with air flow inlets 13 to ensure the air pressure and flow rate while also ensuring the uniformity of air flow distribution.

[0043] In this embodiment, the luer connector 4 includes a connector 41, a connecting inner cylinder 42, and a protective outer cylinder 43. The connecting inner cylinder 42 and the protective outer cylinder 43 are coaxially arranged on the connector 41. The connector 41 is threadedly connected to the spinning through-hole 11. A first connecting seat 21 is fixed on the dispensing needle head 2. The connecting inner cylinder 42 is inserted into the first connecting seat 21, and the protective outer cylinder 43 extends downward beyond the top of the first connecting seat 21.

[0044] The arrangement of the connecting inner cylinder 42 and the first connecting seat 21 facilitates the quick connection of the dispensing needle head 2 and the luer connector 4. At the same time, the protective outer cylinder 43 plays a certain protective role for the connection between the connecting inner cylinder 42 and the first connecting seat 21.

[0045] The spinning through-holes 11 on the nozzle substrate 1 are arranged in a rectangular or circular array. The nozzle substrate 1 selects different arrangements according to the needs of different electrospinning.

[0046] In this embodiment, the nozzle substrate 1 is a rectangular plate. The spinning through-holes 11 on the nozzle substrate 1 are arranged in a rectangular pattern of nine columns and ten rows. The dispensing needle heads 2 are arranged in a rectangular array, and the number of dispensing needle heads 2 is equal to the number of luer connectors 4.

[0047] In another embodiment, the nozzle substrate 1 is a circular plate, and the spinning through-holes 11 on the nozzle substrate 1 are arranged in a circular pattern.

[0048] Two usage methods of this embodiment:

[0049] The first one:

[0050] This embodiment is the most basic application. In application, a rectangular array of nine columns and ten rows of rectangular single-axis dispensing needle heads 2 is fixed on a rectangular array of nine columns and ten rows of luer connectors 4. The length of the dispensing needle heads 2 in the dispensing needle head 2 array is 30 mm, and the inner diameter is 0.51 mm. One of the M4 threaded holes is connected to a 25 kV high-voltage static electricity. The high-voltage static electricity is transmitted to the dispensing needle head 2 array through the nozzle substrate 1 and the luer connector 4 array to form an electric field in the nozzle and the collecting device for electrospinning. The air inlet 13 is connected to an air pump through a hose to introduce an air flow with a pressure of 0.2 Mpa into the nozzle. An air flow is generated through the air outlet 14 to surround the luer connector 4 array in the direction of the spinning direction of the nozzle, suppressing the electric field interference between the dispensing needle heads 2 in the dispensing needle head 2 array of the nozzle, enhancing the stability of the electrospinning jet, and improving the deposition efficiency of electrospun nanofibers. A rectangular array of nine columns and ten rows of quick connectors 3. All the quick connectors 3 are combined into one path through hoses and adapters and connected to a liquid supply pump to introduce electrospinning solution A into the nozzle at a supply speed of 10 mL / h. Through the above electric field, the solution flowing out of the dispensing needle head 2 array is stretched into nanofibers and deposited on the collecting device to produce a nanofiber membrane.

[0051] The second one:

[0052] This embodiment is for the production of a composite nanofiber membrane of two materials. An array of rectangular Luer connectors 4 with nine columns and ten rows is fixed with an array of rectangular single-axis dispensing needles 2 with nine columns and ten rows. Among the array of dispensing needles 2, the needles in the odd rows from left to right are the needle group A, and the corresponding quick connectors 3 for the needle group A are the quick connector group A. The length of the dispensing needle 2 in the needle group A is 17 mm, and the inner diameter is 0.51 mm; the needles in the even rows are the needle group B, and the corresponding quick connectors 3 for the needle group B are the quick connector group B. The length of the needles in the needle group B is 21 mm, and the inner diameter is 0.23 mm. One of the M4 threaded holes is connected to a 30 kV high-voltage static electricity. The high-voltage static electricity is transmitted to the array of dispensing needles 2 through the nozzle substrate 1 and the Luer connector 4 array, forming an electric field in the nozzle and the collecting device for electrospinning. The air inlet 13 is connected to an air pump through a hose, introducing an air flow with a pressure of 0.2 Mpa into the nozzle, generating an air flow that surrounds the Luer connector 4 array and is in the direction of the nozzle spinning direction through the air outlet 14, suppressing the electric field interference between the dispensing needles 2 in the array of dispensing needles 2 of the nozzle, enhancing the stability of the electrospinning jet, and improving the deposition efficiency of the electrospun nanofibers. Through the rectangular quick connector 3 array with nine columns and ten rows, the quick connector group A is assembled into 1 path through a hose and an adapter and connected to the liquid supply pump A, introducing the electrospinning solution A into the nozzle with a liquid supply speed of 10 mL / h; the quick connector group B is assembled into 1 path through a hose and an adapter and connected to the liquid supply pump B, introducing the electrospinning solution B into the nozzle with a liquid supply speed of 6 mL / h. Through the above electric field, the solution flowing out of the array of dispensing needles 2 is stretched into nanofibers and deposited on the collecting device to produce a composite nanofiber membrane of two materials.

[0053] Example 2

[0054] Please refer to Figures 9-10 , the difference between this embodiment and Embodiment 1 is as follows:

[0055] The dispensing needle 2 is a coaxial needle. The coaxial needle includes an inner shaft channel 22 and an outer shaft channel 23. A second connecting seat 24 is provided on the dispensing needle 2. The first connecting seat 21 communicates with the inner shaft channel 22 of the coaxial needle, and the second connecting seat 24 communicates with the outer shaft channel 23 of the coaxial needle. The first connecting seat 21 and the second connecting seat 24 are respectively connected to two adjacent Luer connectors 4.

[0056] The coaxial needle can be used to prepare core-shell structured electrospun fibers. The structures of the first connecting seat 21 and the second connecting seat 24 are the same, and both are connected to the connecting inner cylinder 42 of the Luer connector 4. The dispensing needles 2 are arranged in a rectangular array.

[0057] The usage method of this embodiment is as follows:

[0058] A nine-column and ten-row rectangular Luer connector 4 array is fixed with a nine-column and five-row rectangular coaxial dispensing needle 2 array. In the dispensing needle 2 array, the length of the dispensing needle 2 is 17 mm, the inner diameter of the outer shaft is 1.01 mm; the outer diameter of the inner shaft is 0.72 mm, and the inner diameter is 0.41 mm. The quick connector 3 corresponding to the inner shaft channel 22 in the coaxial dispensing needle 2 is the quick connector 3 group D, and the quick connector 3 corresponding to the outer shaft channel 23 is the quick connector 3 group E. One of the M4 threaded holes is connected to a 30 kV high-voltage static electricity. The high-voltage static electricity is transmitted to the dispensing needle 2 array through the nozzle substrate 1 and the Luer connector 4 array to form an electric field in the nozzle and the collection device for electrospinning. The air inlet 13 is connected to an air pump through a hose to introduce an air flow with a pressure of 0.2 Mpa into the nozzle. An air flow is generated through the air outlet 14 to surround the Luer connector 4 array in the spinning direction of the nozzle, suppressing the electric field interference between the dispensing needles 2 in the dispensing needle 2 array of the nozzle, enhancing the stability of the electrospinning jet, and improving the deposition efficiency of the electrospinning nanofibers. Through a nine-column and ten-row rectangular quick connector 3 array, the quick connector 3 group D is aggregated into 1 path through a hose and an adapter and connected to the liquid supply pump D to introduce the inner shaft electrospinning solution D into the nozzle at a liquid supply speed of 4 mL / h; the quick connector 3 group E is aggregated into 1 path through a hose and an adapter and connected to the liquid supply pump E to introduce the electrospinning solution E into the nozzle at a liquid supply speed of 6 mL / h. Through the above electric field, the solution flowing out of the dispensing needle 2 array is stretched into core-shell structure nanofibers and deposited on the collection device to produce a core-shell structure nanofiber membrane.

[0059] Example 3

[0060] Please refer to Figure 11 , the difference between this example and Example 1 is as follows:

[0061] The nozzle substrate 1 is a rectangular plate, and multiple spinning through holes on the nozzle substrate 1 are arranged in a rectangular pattern. The Luer connectors 4 are arranged in a corresponding rectangular pattern. The arrangement of multiple dispensing needles 2 is as follows: multiple groups of arrangements are repeated. Each group includes two columns. The two columns in the same group of dispensing needles 2 are arranged in a reverse offset manner. At most two dispensing needles 2 are continuously arranged in each column, and there is a column of Luer connectors 4 between adjacent groups.

[0062] Specifically, in this embodiment, the spinning through-holes on the nozzle substrate 1 are arranged in a rectangular pattern of nine columns and ten rows, and the Luer connectors 4 are arranged in a corresponding rectangular pattern. The arrangement of the multiple dispensing needles 2 is as follows: three groups of arrangements are repeated, each group includes two columns, and each column includes five dispensing needles 2. In the same group, one dispensing needle 2 is arranged in the first column first, and then two Luer connectors 4 are spaced apart, and then two dispensing needles 2 are sequentially arranged. The dispensing needles 2 in the second column are arranged in a reverse dislocation pattern with respect to the dispensing needles 2 in the first column. There is a column of Luer connectors 4 spaced between adjacent groups. The arrangement of the dispensing needles in this embodiment has a higher electric field strength and better uniformity at the tip of the needle compared to a rectangular array under the same voltage conditions. It can spin materials with higher requirements for spinning conditions.

[0063] The usage method of this embodiment:

[0064] As Figure 11 shown, a uniaxial dispensing needle 2 array is fixed on a rectangular Luer connector 4 array of nine columns and ten rows. The length of the dispensing needle 2 in the dispensing needle 2 array is 21 mm, and the inner diameter is 0.51 mm. One of the M4 threaded holes is connected to a 40 kV high-voltage static electricity. The high-voltage static electricity is transmitted to the dispensing needle 2 array through the nozzle substrate 11 and the Luer connector 4 array to form an electric field in the nozzle and the collection device for electrospinning. The air inlet 13 is connected to an air pump through a hose to introduce an air flow with a pressure of 0.2 Mpa into the nozzle, and an air flow that surrounds the Luer connector 4 array and is in the spinning direction of the nozzle is generated through the air outlet 14 to suppress the electric field interference between the dispensing needles 2 in the dispensing needle 2 array of the nozzle, enhance the stability of the electrospinning jet, and improve the deposition efficiency of electrospun nanofibers. The quick connectors 3 corresponding to the dispensing needles 2 are combined into one path through hoses and adapters and connected to a liquid supply pump to introduce the electrospinning solution C into the nozzle at a liquid supply speed of 3 mL / h. The electrospinning solution C requires a relatively high electric field for electrospinning. Through the arrangement of this embodiment, the distance between the needles is increased, and the electric field uniformity and strength are improved. The electric field generated by the needle array meets the requirements for electrospinning of the solution C. Through the above electric field, the solution flowing out of the dispensing needle 2 array is stretched into nanofibers and deposited on the collection device to produce nanofiber membranes of special materials. At the same time, other arrays such as a circular array can be used to meet the requirements for electrospinning of other materials.

[0065] In the present invention, multiple dispensing needles 2 are quickly installed with Luer connectors 4, and the arrangement of the dispensing needles 2 can be adjusted arbitrarily. During operation, the quick connectors 3 connected to the dispensing needles 2 are connected to an external spinning solution, so as to perform spinning in various needle arrangements, and thus various materials can be flexibly used for electrospinning. The Luer connectors 4 and the dispensing needles 2 are detachably connected, which is convenient for cleaning the needles. The air flow outlet 14 faces downward. When the dispensing needles 2 are spinning, the air flow outlet 14 ejects an air flow, which effectively suppresses the electric field interference between the dispensing needles 2 in the dispensing needle 2 array, enhances the stability of the electrospinning jet, and improves the deposition efficiency of electrospun nanofibers.

[0066] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, the elements defined by the statement "comprising..." or "including..." do not exclude the existence of additional elements in the process, method, article or terminal device comprising the said elements. In addition, in this article, "greater than", "less than", "exceeding", etc. are understood not to include the present number; "above", "below", "within", etc. are understood to include the present number.

[0067] Although the above-described embodiments have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the above are only the embodiments of the present invention, and do not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An electrospinning composite nozzle, characterized in that It includes a nozzle substrate and a plurality of dispensing needles. A plurality of spinning through-holes arranged in an array are provided on the nozzle substrate. A quick connector is installed at one end of each spinning through-hole, and a luer connector is installed at the other end of each spinning through-hole. The number of the dispensing needles is less than or equal to the number of the luer connectors. Each dispensing needle is detachably connected to at least one luer connector. The plurality of dispensing needles are arranged in an array. An air flow chamber is provided inside the nozzle substrate. An air flow inlet communicating with the air flow chamber is provided on the side surface of the nozzle substrate. Air flow outlets are provided around the luer connectors on the nozzle substrate. All the quick connectors are assembled into one path through hoses and adapters and are connected to a liquid supply pump. The luer connector includes a connecting head, a connecting inner cylinder and a protective outer cylinder. The connecting inner cylinder and the protective outer cylinder are coaxially arranged on the connecting head. The connecting head is threadedly connected to the spinning through-hole. A first connecting seat is fixed on the dispensing needle. The connecting inner cylinder is inserted into the first connecting seat. The protective outer cylinder extends downward beyond the top of the first connecting seat. Four strip-shaped air flow outlets and four circular air flow outlets are provided around each luer connector. The four strip-shaped air flow outlets enclose a square area. The luer connector is located within the square area. The four circular air flow outlets are respectively located at the four corners of the square area.

2. The electrospinning composite nozzle according to claim 1, wherein The dispensing needle is a coaxial needle. The coaxial needle includes an inner shaft channel and an outer shaft channel. A second connecting seat is provided on the dispensing needle. The first connecting seat communicates with the inner shaft channel of the coaxial needle. The second connecting seat communicates with the outer shaft channel of the coaxial needle. The first connecting seat and the second connecting seat are respectively connected to two adjacent luer connectors.

3. The electrospinning composite nozzle according to claim 1, characterized in that, Two adjacent square areas share the air flow outlet therebetween.

4. The electrospinning composite nozzle according to claim 1, wherein, The spinning through-holes on the nozzle substrate are arranged in a rectangular or circular array.

5. The electrospinning composite nozzle according to claim 4, characterized in that, The nozzle substrate is a rectangular plate. The plurality of spinning through-holes on the nozzle substrate are arranged in a rectangle. The luer connectors are arranged in a corresponding rectangle. The arrangement of the plurality of dispensing needles is as follows: multiple groups of arrangements are repeated. Each group includes two columns. The dispensing needles in the two columns of the same group are arranged in a reverse offset manner. At most two dispensing needles are continuously arranged in each column. There is an interval of one column of luer connectors between two adjacent groups.

Images