A composite liquid-supply electrospinning nozzle with controllable components

Abstract

The present invention provides a component-controllable composite liquid supply electrospinning nozzle, comprising a needle and a plurality of transversely spliced flow channel plates, wherein a liquid inlet for connecting a liquid supply device is provided at the connection between each two adjacent flow channel plates, a receiving chamber and a flow channel are provided inside each flow channel plate, the receiving chamber being used to connect the liquid inlet and the flow channel, a liquid outlet being provided at the end of the flow channel, and the liquid outlet being provided at the bottom of the flow channel plate; a flow channel joint is provided at the connection between the receiving chamber and the liquid inlet, the flow channel joint comprising a baffle and a drive module, the drive module being configured such that the baffle can be driven to move, and the movement of the baffle can separately control the flow of the spinning solution into the two adjacent receiving chambers; the needle is installed in the liquid outlet and fixed by a conductive plate, each two adjacent conductive plates are connected by a wire, and the conductive plate at the end is connected to the positive electrode of a power supply for providing a high-voltage electric field. The nozzle of the present invention has a simple structure and is easy to install, and can meet the needs of preparing a variety of composite nanofibers.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic spinning, in particular to a composite liquid-supply electrostatic spinning nozzle with controllable components. Background Art

[0002] Electrospinning, as a nanofiber jet-forming technology, offers numerous advantages over other nanofiber manufacturing techniques due to its simple equipment, easy operation, low cost, and wide availability of raw materials. It has become a mainstream nanofiber production technology and has been widely adopted. However, current electrospinning nozzles, such as the one with rapid multi-needle positioning disclosed in patent CN109267159A and the "shower-shaped" electrospinning nozzle disclosed in patent CN203960405U, have a fixed number of needles, are complex to install, and cannot meet the requirements for producing multi-material composite nanofibers.

[0003] In view of this, the applicant filed this application after studying the existing technology. Summary of the Invention

[0004] The present invention provides a composite liquid-supply electrospinning nozzle with controllable components, aiming to improve at least one of the above-mentioned technical problems.

[0005] To solve the above technical problems, the present invention provides a composite liquid supply electrospinning nozzle with controllable components, comprising a needle and a plurality of transversely spliced flow channel plates, wherein a liquid inlet for connecting to a liquid supply device is provided at the connection between each two adjacent flow channel plates, and each of the flow channel plates is provided with a receiving cavity and a flow channel therein, wherein the receiving cavity is used to connect the liquid inlet and the flow channel, and a liquid outlet is provided at the end of the flow channel, wherein the liquid outlet is provided at the bottom of the flow channel plate;

[0006] A flow channel joint is provided at the connection between the accommodating cavity and the liquid inlet hole. The flow channel joint includes a baffle and a driving module. The driving module is configured such that the baffle can be driven to move, and the flow rate of the spinning solution entering the two adjacent accommodating cavities can be controlled respectively through the movement of the baffle.

[0007] The needle is installed in the liquid outlet and fixed by a conductive plate. Every two adjacent conductive plates are connected by a wire. The conductive plate at the end is connected to the positive pole of the power supply to provide a high-voltage electric field.

[0008] As a further optimization, every two adjacent flow channel plates are connected by a connecting plate, and the flow channel plates on the outermost sides are connected to fixing plates, which are used to axially fix the flow channel plates and seal the flow channel plates on the outermost sides.

[0009] As a further optimization, the connecting plate and the fixing plate are fixedly connected to the flow channel plate by using locking screws, and a through hole adapted to the liquid inlet hole is provided on the connecting plate.

[0010] As a further optimization, the fixed plate is an L-shaped plate, the two ends of the L-shaped plate are respectively connected to the top and side walls of the flow channel, and the end of the L-shaped plate connected to the top surface of the flow channel plate is provided with a through hole adapted to the liquid inlet hole.

[0011] As a further optimization, the driving device includes a motor and a gear, and the baffle is provided with helical teeth meshing with the gear. The motor can drive the gear to rotate, and the gear drives the baffle to move through the helical tooth meshing.

[0012] As a further optimization, the flow channel joint is a three-way joint, which connects the liquid inlet hole with the accommodating cavity of two adjacent flow channel plates. The two ports connected to the flow channel joint and the accommodating cavity are respectively provided with baffles, and each baffle can independently control the spinning solution flow rate of its corresponding port.

[0013] As a further optimization, a control module is also included, which can transmit control signals to the high-voltage electric field, the liquid supply device and the drive module.

[0014] As a further optimization, the liquid supply device includes a syringe pump and a syringe, and the syringe is connected to the liquid inlet through a connecting tube.

[0015] As a further optimization, the conductive plate and the flow channel plate are fixedly connected by screws.

[0016] As a further optimization, two flow channels are provided inside each of the flow channel plates, each flow channel has the same length, and a liquid outlet is provided at the end thereof, and each liquid outlet is provided with a needle.

[0017] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0018] The present application provides a component-controllable composite liquid supply electrospinning nozzle, which is formed by horizontally splicing several flow channel plates. Two adjacent flow channel plates are fixedly connected by a connecting plate, and the two outermost flow channel plates are axially fixed using a fixing plate. A liquid inlet hole connected to a liquid supply device is provided on each two adjacent flow channel plates. A accommodating chamber and a flow channel are provided in each flow channel plate. The accommodating chamber connects the liquid inlet hole and the flow channel. A flow channel joint is provided at the connection between the accommodating chamber and the liquid inlet hole. A movable baffle is provided in the flow channel joint. A liquid outlet hole is provided at the end of the flow channel. A needle is installed in the liquid outlet hole. The needle is fixed by a conductive plate. Adjacent conductive plates are connected by a wire. The endmost conductive plate is connected to the positive pole of the power supply. The entire nozzle structure is simple and easy and quick to install. The number of spliced flow channel plates can be changed according to the preparation requirements of the nanofiber material. The movable baffle provided in the flow channel joint can control the flow area of the spinning solution at the port by moving the baffle to control the flow rate of the spinning solution to meet the preparation requirements of composite nanofibers of different components. It can also be used to prepare multiple nanofibers simultaneously, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a composite liquid-supply electrospinning nozzle with controllable components according to the present invention;

[0021] Figure 2 This is a schematic structural diagram of a component-controllable composite liquid-supply electrospinning nozzle of the present invention, in which four flow channel plates are spliced;

[0022] Figure 3 Schematic diagram of the top view of the baffle and the drive module;

[0023] Figure 4 This is a structural diagram of the baffle and drive module from another perspective;

[0024] Figure 5 This is a schematic diagram of the structure when three flow channel plates are spliced together;

[0025] Figure 6 is a structural diagram of another embodiment;

[0026] Markings in the figure: 1-flow channel plate; 11-liquid inlet; 12-accommodating chamber; 13-flow channel; 14-liquid outlet; 2-needle; 3-conductive plate; 4-wire; 5-fixing plate; 51-connecting plate; 52-locking screw; 6-flow channel connector; 61-baffle; 62-drive module; 621-motor; 622-gear; 7-liquid supply device; 71-injection pump; 72-syringe; 73-connecting tube; 8-control module. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Depend on Figures 1 to 5As shown, an embodiment of the present invention provides a composite liquid supply electrospinning nozzle with controllable components, including a transversely spliced flow channel plate 1, where every two adjacent flow channel plates 1 are connected by a connecting plate 51, and the two flow channel plates 1 on the outermost sides are connected with a fixing plate 5, which is an L-shaped plate that can be connected to the top surface and side wall of the flow channel plate 1 at the same time, and is used to axially fix the flow channel plate 1. The connecting plate 51 and the fixing plate 5 are both fixedly connected to the flow channel plate 1 by locking screws 52, and the number of splicing flow channel plates 1 can be changed according to the preparation requirements of the nanofibers. A liquid inlet hole 11 is provided at the connection between every two adjacent flow channel plates 1, and the liquid inlet hole 11 is connected to the liquid supply device 7. A accommodating chamber 12 and a flow channel 13 are provided inside each flow channel plate 1, and the accommodating chamber 12 connects the liquid inlet hole 11 and the flow channel 13. The accommodating chambers 12 of the two adjacent flow channel plates 1 can be connected, and the accommodating chambers 12 of the flow channel plates on the outermost sides are sealed by the fixing plates 5 connected to the side walls. The connection between the accommodating chamber 12 and the liquid inlet hole 11 is provided with a flow channel joint 6. The flow channel joint 6 adopts a three-way joint for connecting the liquid inlet hole 11 and the two adjacent accommodating chambers 12. The two ports connected to the accommodating chamber 12 are provided with a baffle 61. The baffle 61 is connected to a driving module 62. The driving module 62 includes a motor 621 and a gear 622. The baffle 61 is provided with helical teeth meshing with the gear 622. The motor 621 can drive the gear 622 to rotate. The gear 622 drives the baffle 61 up and down through the helical teeth meshing with it, thereby controlling the flow of the spinning solution in the liquid inlet hole 11. The flow rate to the accommodating chamber 12 is controlled by a motor 621 and a gear 622 at each of the two ports of the baffle, so that the flow rate of the spinning solution flowing from the corresponding port into the accommodating chamber 12 can be independently controlled; a liquid outlet 14 is provided at the end of the flow channel 13, and the liquid outlet 14 is located at the bottom of the flow channel plate 1. A needle 2 is installed in the liquid outlet 14, and the needle 2 can be inserted from the liquid outlet 14 and fixed by a conductive plate 3. The conductive plate 3 and the flow channel plate 1 are fixed with screws. Each adjacent two conductive plates 3 are connected by a wire 4. The conductive plate 3 at the end is connected to the positive pole of the power supply to provide a high-voltage electric field. Multiple flow channels 12 can be provided in each flow channel plate 1, and a liquid outlet 14 is provided at the end of each flow channel 12. A needle 2 is installed in each liquid outlet 14 to improve the preparation efficiency of nanofibers. The present application preferably provides two flow channels 12, and the lengths of the two flow channels 12 are the same to ensure that the speed of the spinning solution is consistent when it reaches the needle 2.

[0029] Depend on Figure 1As shown, the liquid supply device 7 includes an injection pump 71, a syringe 72 and a connecting tube 73. The connecting tube 73 connects the liquid inlet 11 and the syringe 72. The spinning solution is loaded in the syringe 72. The injection pump 71 provides power for the syringe 72 so that the spinning solution can be transported to the flow channel plate 1 through the connecting tube 73. One end of the L-shaped plate connected to the top surface of the flow channel plate 1 and the connecting plate 51 are provided with a through hole adapted to the liquid inlet 11, so that the connecting tube 73 can be connected to the through hole, thereby connecting to the liquid inlet 11.

[0030] Depend on Figure 1 and Figure 2 As shown, the control module 8 is further included. The control module 8 can output control signals to the electric field, the liquid supply device 7, and the drive module 62 to control their activation, the flow rate and velocity of the spinning solution, etc. For the preparation of composite nanomaterials, the component ratio, such as 4:6, 1:1, 1:9, etc., can be input into the control module 8. The control module 8 calculates the component ratio and converts it into the travel distance of the baffle 61 corresponding to the spinning solution delivery port. The control module 8 controls the motor 621 to drive the baffle 61 to move, thereby controlling the delivery area of the spinning solution at the port, thereby controlling the flow rate of the spinning solution into the receiving chamber 12.

[0031] As shown in FIG6 , the connection between each two adjacent flow channel plates 1 can be provided with different numbers of liquid inlet holes 11 , such as 2, 3, etc., so that a variety of spinning solutions can be transported to the accommodating cavity 12 to meet the preparation of more types of composite nanofibers.

[0032] Working Principle: Figure 1 shows an example of simultaneously producing two composite nanofibers. In this example, the two composite nanofibers contain the same spinning solution composition. The nozzle in this example utilizes four manifold plates 1, each equipped with three inlet ports. Each inlet port 11 is connected to a liquid supply device, and the central inlet port 11 is connected to a liquid supply device loaded with a spinning solution of the same composition. The control module 8 inputs the composition ratio of the composite nanofiber material. The control module 8 controls the drive module 62 to move the baffle 61 a corresponding distance, freeing the flow area of the corresponding port of the manifold connector 6. The control module 8 activates the electric field and activates the liquid supply device 7. Each liquid supply device 7 delivers the same spinning solution flow rate. The spinning solution enters the manifold plate 1 through the inlet port 11 via the connecting tube 73, flows through the manifold connector 6, and then flows into the receiving chamber 12, where it mixes. The solution then flows from the flow channel connected to the receiving chamber to the outlet port, where it is ejected through the needle. This allows the simultaneous production of two composite nanofibers, improving nanofiber production efficiency. When preparing a single type of nanofiber, the control module 8 controls the baffle 61 to completely open the port. Alternatively, the baffle 61 can be used to completely close some of the flow ports, dividing the flow channel plate 1 into several independent parts, so as to prepare multiple types of nanofibers simultaneously.

[0033] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A composite liquid supply electrospinning nozzle with controllable components, characterized in that: It includes a needle and several transversely spliced flow channel plates. The connection between each two adjacent flow channel plates is provided with a liquid inlet for connecting to a liquid supply device. Each of the flow channel plates is provided with a receiving cavity and a flow channel. The receiving cavity is used to connect the liquid inlet and the flow channel. The end of the flow channel is provided with a liquid outlet. The liquid outlet is provided at the bottom of the flow channel plate. A flow channel joint is provided at the connection between the accommodating cavity and the liquid inlet hole, and the flow channel joint includes a baffle and a driving module, and the driving module is configured to drive the baffle to move, and control the flow rate of the spinning solution entering the two adjacent accommodating cavities respectively through the movement of the baffle; The needle is installed in the liquid outlet and fixed by a conductive plate. Every two adjacent conductive plates are connected by a wire. The conductive plate at the end is connected to the positive electrode of the power supply to provide a high-voltage electric field. The flow channel joint is a three-way joint that connects the liquid inlet hole with the accommodating cavity of two adjacent flow channel plates. The two ports connecting the flow channel joint with the accommodating cavity are respectively provided with baffles, and each baffle can independently control the spinning solution flow rate of its corresponding port.

2. A component-controllable composite liquid supply electrospinning nozzle according to claim 1, characterized in that Each two adjacent flow channel plates are connected by a connecting plate, and the flow channel plates on the outermost sides are connected with a fixing plate, which is used to axially fix the flow channel plates and seal the flow channel plates on the outermost sides.

3. A component-controllable composite liquid supply electrospinning nozzle according to claim 2, characterized in that The connecting plate and the fixing plate are fixedly connected to the flow channel plate by locking screws, and a through hole that is compatible with the liquid inlet hole is provided on the connecting plate.

4. A component-controllable composite liquid supply electrospinning nozzle according to claim 2, characterized in that The fixed plate is an L-shaped plate, and the two ends of the L-shaped plate are respectively connected to the top and side walls of the flow channel. The end of the L-shaped plate connected to the top surface of the flow channel plate is provided with a through hole adapted to the liquid inlet hole.

5. A component-controllable composite liquid supply electrospinning nozzle according to claim 1, characterized in that The driving module includes a motor and a gear. The baffle is provided with helical teeth that mesh with the gear. The motor can drive the gear to rotate, and the gear drives the baffle to move through the helical teeth meshing.

6. A component-controllable composite liquid supply electrospinning nozzle according to claim 1, characterized in that , also includes a control module, which can transmit control signals to the high-voltage electric field, the liquid supply device and the driving module.

7. The component-controllable composite liquid supply electrospinning nozzle according to claim 1, characterized in that The liquid supply device includes an injection pump and a syringe, and the syringe is connected to the liquid inlet through a connecting tube.

8. The component-controllable composite liquid supply electrospinning nozzle according to claim 1, characterized in that , the conductive plate and the flow channel plate are fixedly connected by screws.

9. The component-controllable composite liquid supply electrospinning nozzle according to claim 1, characterized in that Each of the flow channel plates is provided with two flow channels inside, each flow channel has the same length, and a liquid outlet is provided at the end thereof, and each liquid outlet is provided with a needle.

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