Electrospinning near-field direct-write jetting triggering system, method and apparatus

Abstract

The present application relates to the technical field of electrospinning, and discloses an electrospinning near-field direct-writing jet triggering system, method and equipment. The system comprises an electrospinning direct-writing needle assembly, a collecting plate and a driving device. A high-voltage electrostatic field is applied between the electrospinning direct-writing needle assembly and the collecting plate. The driving device is used to trigger the electrospinning direct-writing needle assembly to generate micro-vibration parallel to the direction of the high-voltage electrostatic field, so that the charged droplets of the electrospinning direct-writing needle assembly trigger the charged jet due to the inertial effect under high speed. The present application can improve the reliability and stability of jet triggering, and can realize multi-needle near-field direct-writing jet triggering, thereby improving the feasibility of batch manufacturing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrospinning, and particularly relates to an electrospinning near-field direct writing jet triggering system, method and device. BACKGROUND

[0002] Electrospinning is a special nanofiber manufacturing process, which realizes jet ejection and drawing through applying a high-voltage electric field between a syringe containing a spinning solution or spinning melt and a collection plate, and an unordered nanofiber film can be obtained on the collection plate.

[0003] The electrospinning near-field direct writing technology provides a corresponding scheme for realizing ordered nanometer addition, which makes the jet fall on the collection plate when the jet is in the stable section by reducing the distance between the needle tip of the syringe and the collection plate, and realizes the ordered deposition of fibers by cooperating with the programmable movement of the collection plate or the nozzle. Patent No. CN202010871949 discloses a piezoelectric drive type direct writing electrospinning system, which comprises an electrospinning direct writing needle assembly, a collection plate and a driving device. The electrospinning direct writing needle assembly is located above the collection plate, and the distance between the electrospinning direct writing needle assembly and the collection plate is not greater than 5 mm. The driving device comprises a piezoelectric ceramic actuator and a driving controller, the driving controller is used to make the piezoelectric ceramic actuator produce displacement and adjust and control the displacement, and the piezoelectric ceramic actuator is used to drive the electrospinning direct writing needle assembly or the collection plate to produce micro motion. The patent document realizes the horizontal micro reciprocating motion of the nozzle by increasing the piezoelectric ceramic and the flexible transmission mechanism perpendicular to the electric field direction on the nozzle assembly, so as to achieve the control of the meandering trajectory of the fiber deposition. However, the patent document only realizes the trajectory control of the needle by the micro movement in the needle tip plane coordinate system parallel to the receiving substrate plane, and does not involve the scheme of how to trigger the jet.

[0004] As for the jet triggering scheme, the current electrospinning near-field direct writing technology still has the following problems:

[0005] For the electrospinning near-field direct writing technology, as the distance between the needle tip and the collection plate decreases, the air is easily broken down, causing the jet that is about to be triggered to lose the effect of the electric field instantly. At the same time, since the voltage for triggering the jet is slightly higher than the voltage for keeping the jet stable, the voltage needs to be adjusted back after the jet is triggered, and the specific adjustment amplitude is not easy to control, which reduces the stability and reliability of the jet triggering. In addition, the jet triggering mode of the electrospinning near-field direct writing is mostly that the charged droplet (spinning liquid / spinning melt) naturally drops in the electric field or is pulled by an external tool to trigger the jet, which is difficult to realize the stable production of ordered fiber products.

[0006] Therefore, it is necessary to provide a scheme which is more convenient for stably triggering the jet. SUMMARY

[0007] The application provides an electrospinning near-field direct writing jet flow triggering system, method and equipment, and solves the technical problem that the existing electrospinning near-field direct writing jet flow triggering scheme is difficult to realize reliable and stable jet flow triggering.

[0008] The first aspect of the application provides an electrospinning near-field direct writing jet flow triggering system, which comprises an electrospinning direct writing needle assembly, a collecting plate and a driving device, a high-voltage electrostatic field is applied between the electrospinning direct writing needle assembly and the collecting plate, and the driving device is used to trigger the electrospinning direct writing needle assembly to generate micro-vibration parallel to the direction of the high-voltage electrostatic field, so that the charged droplets of the electrospinning direct writing needle assembly trigger the charged jet flow due to the inertial effect under high speed.

[0009] According to an implementable mode of the first aspect of the application, the electrospinning direct writing needle assembly comprises an electrospinning direct writing needle and a fixed support;

[0010] The electrospinning direct writing needle comprises a needle cylinder and a transfusion needle, the transfusion needle is connected to the bottom of the needle cylinder, and the fixed support is used to fix the needle cylinder;

[0011] When the driving device moves, the fixed support generates micro-vibration parallel to the direction of the high-voltage electrostatic field, the micro-vibration is transmitted to the needle cylinder, and the charged droplets on the corresponding transfusion needle trigger the charged jet flow due to the inertial effect under high speed.

[0012] According to an implementable mode of the first aspect of the application, the driving device comprises a first control module and a triggering module connected to each other;

[0013] The triggering module is adjacent to the fixed support, and is used to trigger the fixed support to generate micro-vibration parallel to the direction of the high-voltage electrostatic field under the control of the first control module.

[0014] According to an implementable mode of the first aspect of the application, the triggering module is a piezoelectric ceramic trigger;

[0015] Alternatively, the triggering module comprises a stepping motor and a screw rod feeding platform connected to each other, and the screw rod feeding platform is adjacent to the fixed support.

[0016] According to an implementable mode of the first aspect of the application, the driving device comprises a second control module, a driving part and a stop block;

[0017] The driving part is connected to the fixed support, and is used to drive the fixed support to realize feeding movement under the control of the second control module;

[0018] The stop block is fixed below the fixed support and is away from the fixed support by a preset distance threshold, so as to provide a stopping force when the fixed support performs the feeding movement.

[0019] According to an implementable manner of the first aspect of the application, the driving member is a stepper motor.

[0020] According to an implementable manner of the first aspect of the application, the electrospinning direct writing needle is a plurality of, the fixing support includes needle cylinder supports and a connecting plate, each of the needle cylinder supports is used for fixing a needle cylinder of one of the electrospinning direct writing needles, each of the needle cylinder supports is connected into one body through the connecting plate, and the driving device is adjacent to the connecting plate.

[0021] Alternatively, the electrospinning direct writing needle is a plurality of, the needle cylinder of each of the electrospinning direct writing needles is connected to one of the fixing supports, and each of the fixing supports generates a micro-vibration parallel to the direction of the high-voltage electrostatic field under the triggering of the adjacent driving device.

[0022] The second aspect of the application provides an electrospinning near-field direct writing jet triggering method, which is applied to the electrospinning near-field direct writing jet triggering system according to any one of the implementable manners described above, and the method comprises the following steps of:

[0023] Starting the driving device to trigger the electrospinning direct writing needle assembly to generate a micro-vibration parallel to the direction of the high-voltage electrostatic field, so that the charged droplets of the electrospinning direct writing needle assembly trigger the charged jet due to the inertial effect under high speed.

[0024] The third aspect of the application provides an electrospinning near-field direct writing jet triggering device, which comprises:

[0025] A memory for storing instructions, wherein the instructions are used to implement the electrospinning near-field direct writing jet triggering method described above.

[0026] A processor for executing the instructions in the memory.

[0027] The fourth aspect of the application provides a computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the electrospinning near-field direct writing jet triggering method described above.

[0028] As can be seen from the above technical solutions, the application has the following advantages:

[0029] The system of the present application comprises an electrospinning direct writing needle assembly, a collecting plate and a driving device, a high-voltage electrostatic field is applied between the electrospinning direct writing needle assembly and the collecting plate, the present application triggers the micro-vibration of the electrospinning direct writing needle assembly parallel to the direction of the high-voltage electrostatic field through the driving device, so that the charged droplets of the electrospinning direct writing needle assembly trigger the charged jet flow due to the inertia effect at high speed; the present application can overcome the limitations brought by the jet flow triggering scheme of the existing electrospinning near-field direct writing, and is easy to realize programmable control, and overall improves the reliability and stability of jet flow triggering. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 A structural connection block diagram of an electrospinning near-field direct writing jet flow triggering system provided for an optional embodiment of the present application is shown in

[0032] Figure 2 A structural connection block diagram of a driving device provided for an optional embodiment of the present application is shown in

[0033] Figure 3 A schematic diagram of an electrospinning near-field direct writing jet flow triggering system realizing single-needle triggering when the touch module is a piezoelectric ceramic touch trigger provided for an optional embodiment of the present application is shown in

[0034] Figure 4 A schematic diagram of an electrospinning near-field direct writing jet flow triggering system realizing single-needle triggering when the touch module comprises a step motor and a screw rod feeding platform connected to each other provided for an optional embodiment of the present application is shown in

[0035] Figure 5 A structural connection block diagram of a driving device provided for another optional embodiment of the present application is shown in

[0036] Figure 6 A schematic diagram of a needle cylinder stop triggering by the driving device provided for an optional embodiment of the present application is shown in Figure 5

[0037] Figure 7 A schematic diagram of an electrospinning near-field direct writing jet flow triggering system realizing multi-needle single-touch trigger when the touch module is a piezoelectric ceramic touch trigger provided for an optional embodiment of the present application is shown in

[0038] Figure 8 ​The schematic diagram of the programmable triggering of the multi-needle and multi-actuator electrospinning near-field direct writing jet flow triggering system provided by the optional embodiment of the present application is when the triggering module is a piezoelectric ceramic trigger.

[0039] Figure 9 The flow chart of the electrospinning near-field direct writing jet flow triggering method provided by the optional embodiment of the present application.

[0040] Reference signs:

[0041] 1-electrospinning direct writing needle assembly; 2-driving device; 3-collecting plate; 11-electrospinning direct writing needle; 12-fixing support; 111-needle cylinder; 112-infusion needle; 21-first control module; 2-triggering module; 221-piezoelectric ceramic trigger; 222-stepping motor; 223-screw rod feeding platform; 23-second control module; 24-driving part; 25-stop block; 121-needle cylinder frame; 122-connection plate. DETAILED DESCRIPTION

[0042] The embodiment of the present application provides an electrospinning near-field direct writing jet flow triggering system, method and equipment, and is used for solving the technical problem that the existing electrospinning near-field direct writing jet flow triggering scheme is difficult to realize reliable and stable jet flow triggering.

[0043] In order to make the application purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0044] The present application provides an electrospinning near-field direct writing jet flow triggering system.

[0045] Please refer to Figure 1 , Figure 1 The structure connection block diagram of the electrospinning near-field direct writing jet flow triggering system provided by the embodiment of the present application is shown.

[0046] The electrospinning near-field direct writing jet flow triggering system provided by the embodiment of the present application comprises an electrospinning direct writing needle assembly 1, a driving device 2 and a collecting plate 3, a high-voltage electrostatic field is applied between the electrospinning direct writing needle assembly 1 and the collecting plate 3, and the driving device 2 is used for triggering the electrospinning direct writing needle assembly 1 to generate a micro-vibration parallel to the direction of the high-voltage electrostatic field, so that the charged droplets of the electrospinning direct writing needle assembly 1 trigger the charged jet flow due to the inertial effect under high speed.

[0047] For jet triggering, it is necessary to build instantaneous action in the direction of the electric field to facilitate the triggering of the jet, in the embodiment of the present application, the charged liquid droplets are triggered by inertia at high speed, which can overcome the limitations of the existing electrospinning near-field direct writing jet triggering scheme, and is easy to realize programmable control, thereby improving the reliability and stability of the jet triggering as a whole.

[0048] In an implementable manner, the electrospinning direct writing needle assembly 1 comprises an electrospinning direct writing needle 11 and a fixed support 12; the electrospinning direct writing needle 11 comprises a needle cylinder 111 and a liquid delivery needle 112 connected to the bottom of the needle cylinder 111, and the fixed support 12 is used to fix the needle cylinder 111.

[0049] When the driving device 2 moves, the fixed support 12 generates a micro-vibration parallel to the direction of the high-voltage electrostatic field, and the micro-vibration is transmitted to the needle cylinder 111, so that the charged liquid droplets on the corresponding liquid delivery needle 112 are triggered by inertia at high speed.

[0050] It should be noted that when the impact type triggering is used, the driving device 2 should be kept with a slight gap from the impact position, and the length of the gap is set based on the required triggering force of the solution viscosity of the charged liquid droplets.

[0051] In an implementable manner, as shown in Figure 2 The driving device 2 comprises a first control module 21 and a touch module 22 connected to each other.

[0052] The touch module 22 is adjacent to the fixed support 12 to trigger the fixed support 12 to generate a micro-vibration parallel to the direction of the high-voltage electrostatic field under the control of the first control module 21.

[0053] In the embodiment of the present application, the charged liquid droplets are triggered by inertia at high speed by actively impacting the needle cylinder 111 by the touch module 22.

[0054] As an embodiment, as shown in Figure 3 The touch module 22 is a piezoelectric ceramic touch actuator 221. The spinning liquid / spinning melt of the needle tip can be made to appear micro-nano vibration by programmable control of the piezoelectric ceramic by the first control module 21, and because of inertia, the spinning liquid / spinning melt will definitely produce drawing, and the ready-made direct writing electric field can make the jet produced by drawing stable.

[0055] It should be noted that the piezoelectric ceramic touch actuator 221 in the embodiment of the present application can be a general piezoelectric ceramic trigger product on the market, and the specific structure of the piezoelectric ceramic touch actuator 221 is not limited in the embodiment.

[0056] As another implementation manner, as shown in Figure 4 The triggering module 22 comprises a stepper motor 222 and a screw feeding platform 223 connected to each other, and the screw feeding platform 223 is adjacent to the fixed support 12.

[0057] It should be noted that the specific structure of the screw feeding platform 223 can refer to the prior art, and is not limited in the embodiment of the present application.

[0058] In the embodiment of the present application, the needle cylinder 111 is in a fixed state with the fixed support 12, and the screw feeding platform 223 is driven by the stepper motor 222. Under the premise that the stiffness of the needle cylinder 111 and the fixed support 12 is high, the high-speed feeding impact of the screw feeding platform 223 will cause the needle cylinder 111 to vibrate slightly, and then the liquid bead suspended by the needle will be shaken off, triggering the jet flow.

[0059] In an implementable manner, as shown in Figure 5 、 Figure 6 The driving device 2 comprises a second control module 23, a driving member 24 and a cutoff block 25.

[0060] The driving member 24 is connected to the fixed support 12 to drive the fixed support 12 to realize feeding motion under the control of the second control module 23.

[0061] The cutoff block 25 is fixed below the fixed support 12 and is away from the fixed support 12 by a preset distance threshold, so as to provide a cutoff force when the fixed support 12 performs feeding motion.

[0062] As an implementation manner, the driving member 24 is a stepper motor 222, which drives the fixed support 12 to realize feeding motion under the control of the second control module 23.

[0063] In the embodiment of the present application, the charged liquid droplet is triggered to form a jet flow due to the inertia of high-speed under the mode of being passively vibrated by the cutoff force caused by the movement of the needle cylinder 111. Specifically, when the needle cylinder 111 touches the cutoff block 25 (the cutoff block 25 is in a fixed state), the needle cylinder 111 stops moving, but the liquid droplet at the needle tip will continue to move in the direction of movement due to inertia, thereby realizing the triggering of the jet flow.

[0064] Based on the above system, the present application can realize multi-needle near-field direct writing jet flow triggering, thereby improving the implementation feasibility of batch manufacturing.

[0065] Taking the piezoelectric ceramic trigger 221 of the triggering module 22 as an example, in an implementable manner, as shown in Figure 7As shown, the electrospinning direct writing needle 11 is multiple, the fixed support 12 includes a needle cylinder frame 121 and a connecting plate 122, each needle cylinder frame 121 is used for fixing the needle cylinder 111 of one electrospinning direct writing needle 11, and each needle cylinder frame 121 is connected into an integrated whole through the connecting plate 122, and the driving device 2 is adjacent to the connecting plate 122.

[0066] In the embodiment of the present application, the connecting plate 122 is added between the piezoelectric ceramic touch actuator 221 and the needle cylinder 111, so that the single-point micro-vibration can be transmitted to multiple needle cylinders 111 at the same time, thereby realizing the simultaneous triggering of the single trigger of the multiple needle heads.

[0067] It should be noted that, Figure 7 The mode of adding the connecting plate 122 shown can also be applied to Figure 4 and Figure 5 corresponding driving devices 2 to realize the simultaneous triggering of the single trigger of the multiple needle heads.

[0068] In another implementable mode, the electrospinning direct writing needle 11 is multiple, the needle cylinder 111 of each electrospinning direct writing needle 11 is connected to one fixed support 12, and each fixed support 12 generates micro-vibration parallel to the direction of the high-voltage electrostatic field under the triggering of the adjacent driving device 2. As an embodiment, Figure 8 As shown, each fixed support 12 is adjacent to one touch module 22 to generate micro-vibration parallel to the direction of the high-voltage electrostatic field under the triggering of the adjacent touch module 22.

[0069] In the embodiment of the present application, the programmable triggering of the multiple-needle multiple-touch actuator can be realized.

[0070] It should be noted that, Figure 8 The mode shown can also be applied to Figure 4 and Figure 5 corresponding driving devices 2 to realize the programmable triggering of the multiple-needle multiple-touch actuator.

[0071] In the above embodiment of the present application, the scheme of multiple-needle near-field direct writing is proposed, and the unified triggering of the multiple-needle near-field direct writing jet flow is realized through the controllable vibration, which helps to improve the yield of the near-field direct writing microstructure manufacturing.

[0072] The present application also provides an electrospinning near-field direct writing jet flow triggering method, which is applied to the electrospinning near-field direct writing jet flow triggering system capable of being realized in any one of the above modes.

[0073] Please refer to Figure 9 , Figure 9 The flow chart of the electrospinning near-field direct writing jet flow triggering method provided by the embodiment of the present application is shown.

[0074] The electrospinning near-field direct writing jet triggering method provided by the embodiment comprises the following steps:

[0075] In step S1, the driving device 2 is started to trigger the micro-vibration of the electrospinning direct writing needle assembly 1 parallel to the direction of the high-voltage electrostatic field, so that the charged droplets of the electrospinning direct writing needle assembly 1 trigger the charged jet due to the inertial effect under high speed.

[0076] The electrospinning near-field direct writing jet triggering device provided by the embodiment comprises the following steps:

[0077] The memory is used for storing instructions; wherein the instructions are used for realizing the electrospinning near-field direct writing jet triggering method as described above.

[0078] The processor is used for executing the instructions in the memory.

[0079] The application further provides a computer readable storage medium, characterized in that the computer readable storage medium has a computer program stored thereon, and the computer program is executed by the processor to realize the electrospinning near-field direct writing jet triggering method as described above.

[0080] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the method and device described above can refer to the corresponding process in the foregoing system embodiments, and the specific beneficial effects of the method and device described above can refer to the corresponding beneficial effects in the foregoing system embodiments, which will not be described here.

[0081] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrospinning near-field direct-write jetting trigger system comprising an electrospinning direct-write needle assembly, a collector plate, and a driving device, a high-voltage electrostatic field being applied between the electrospinning direct-write needle assembly and the collector plate, characterized in that, The electrospinning direct writing needle assembly comprises an electrospinning direct writing needle and a fixing support; The electrospinning direct writing needle comprises a needle cylinder and a delivery needle, the delivery needle is connected to the bottom of the needle cylinder, and the fixing support is used to fix the needle cylinder; The driving device triggers the fixing support to generate micro-vibration parallel to the direction of the high-voltage electrostatic field when the driving device moves, the micro-vibration is transmitted to the needle cylinder, and the charged droplets on the corresponding delivery needle trigger the charged jet due to the inertia effect under high speed.

2. The electrospinning near-field direct-write jetting trigger system according to claim 1, wherein, The driving device comprises a first control module and a triggering module connected to each other; The triggering module is adjacent to the fixing support to trigger the fixing support to generate micro-vibration parallel to the direction of the high-voltage electrostatic field under the control of the first control module.

3. The electrospinning near-field direct-write jetting trigger system according to claim 2, wherein, The triggering module is a piezoelectric ceramic trigger. Alternatively, the triggering module comprises a stepping motor and a screw rod feeding platform connected to each other, and the screw rod feeding platform is adjacent to the fixing support.

4. The electrospinning near-field direct-write jetting trigger system according to claim 1, wherein, The driving device comprises a second control module, a driving member and a stop block; The driving member is connected to the fixing support to drive the fixing support to realize feeding motion under the control of the second control module; The stop block is fixed below the fixing support and is away from the fixing support by a preset distance threshold to provide a stopping force when the fixing support moves in feeding motion.

5. The electrospinning near-field direct-write jetting trigger system according to claim 4, wherein, The driving member is a stepping motor.

6. The electrospinning near-field direct-write jetting trigger system according to claim 1, wherein, The electrospinning direct writing needle is a plurality of, the fixing support comprises a needle cylinder holder and a connecting plate, each needle cylinder holder is used to fix the needle cylinder of one electrospinning direct writing needle, each needle cylinder holder is connected to be integrated through the connecting plate, and the driving device is adjacent to the connecting plate. Alternatively, the electrospinning direct writing needle is a plurality of, the needle cylinder of each electrospinning direct writing needle is connected to one fixing support, and each fixing support generates micro-vibration parallel to the direction of the high-voltage electrostatic field under the triggering of the adjacent driving device.

7. An electrospinning near-field direct-write jetting method, comprising: The method is applied to the electrospinning near-field direct writing jet triggering system as claimed in any one of claims 1-6, and the method comprises: Starting the driving device to trigger the electrospinning direct writing needle assembly to generate micro-vibration parallel to the direction of the high-voltage electrostatic field, so that the charged droplets of the electrospinning direct writing needle assembly trigger the charged jet due to the inertia effect under high speed.

8. An electrospinning near-field direct-write jetting trigger device, comprising: It comprises: A memory for storing instructions; wherein the instructions are used to realize the electrospinning near-field direct writing jet triggering method as claimed in claim 7; A processor for executing the instructions in the memory.

9. A computer-readable storage medium, characterized in that, The computer program is stored on the computer readable storage medium, and the computer program is executed by the processor to realize the electrospinning near-field direct writing jet triggering method as claimed in claim 7.

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