An insulating surface electrospray printing device and method based on real-time plasma treatment

Abstract

The present application belongs to the technical field of curved surface electronic Wiener manufacturing, and discloses an insulating surface electroblotting device and method based on real-time plasma processing, which comprises an electroblotting assembly and a plasma assembly, wherein the electroblotting assembly and the plasma assembly work synchronously; the electroblotting assembly is used for conveying ink to a nozzle to form a jetting jet; the plasma assembly is used for processing an insulating surface by adopting a ring-shaped plasma beam to inject a polarized group into the insulating surface, and the polarized group generates a negative polarity charge under the action of an electroblotting electric field, and at the same time, residual charges of ink liquid and polarized charges of the insulating surface are neutralized to realize stable jetting and deposition of ink jets / drops on the insulating surface. The present application solves the printing and forming problem of a complex microstructure of an insulating substrate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of curved surface electronic manufacturing, and more particularly to an insulating surface electro-spraying device and method based on real-time plasma processing. BACKGROUND

[0002] Curved surface electronics have the characteristics of large specific surface area, large contact area, high spatial adaptability, high stability, etc., and have a wide range of applications in the fields of aerospace, flexible display, flexible sensing and flexible energy. Due to the non-planar and complex shape, curved surface electronics are not compatible with traditional planar electronic photolithography process. Electrohydrodynamic jet printing is to use a high-voltage waveform to build a strong electric field between the nozzle and the substrate, so that an induced charge is formed on the meniscus at the front end of the nozzle, thereby forming droplet ejection under the action of electric field force, surface tension and gravity. Electrohydrodynamic jet printing has the advantages of high resolution, wide range of printing materials, and non-contact printing, and is well suited for curved surface manufacturing.

[0003] However, for printing of insulating components with high dielectric constant, large curvature or large area, and large thickness, the electrohydrodynamic jet printing process has the following shortcomings: 1) The formation of a stable conical jet in electrohydrodynamic jet printing requires a critical field strength threshold, but large insulating substrates have a high profile, and it is usually difficult to build sufficient electric field strength; 2) The tip discharge generated by the nozzle can cause the accumulation of surface charges on the substrate, and there are also residual charges in the printed structure, which can cause spatial electric field distortion and affect electrojet printing formation.

[0004] Currently, a new principle and method of plasma surface pretreatment assisted insulating surface electrojet printing has been proposed, which can inhibit the accumulation of insulating surface charges, accelerate the dissipation of insulating charges, and thus eliminate electric field distortion and enhance the electric field. However, plasma surface treatment has timeliness, and the step-by-step process has the problems of high cost, difficulty in ensuring uniformity, and low efficiency for large-size and large-curvature workpieces. Therefore, there is an urgent need in the field to propose a printing method that synchronizes plasma surface treatment with electrohydrodynamic jet printing, and to develop a printing device that integrates plasma and electrohydrodynamic jet printing functions to adapt to the efficient and stable manufacturing of large-area and large-curvature insulating component surface structures. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the present application provides an insulating surface electrojet printing device and method based on real-time plasma processing, which synchronizes plasma processing with electrohydrodynamic jet printing, so that the residual charges of the deposited ink and the polarization charges of the insulating surface can be quickly neutralized to realize stable jet / ejection deposition of ink droplets on the insulating surface, solving the problem of printing and forming complex microstructures on insulating substrates.

[0006] To achieve the above object, according to one aspect of the present application, there is provided an insulating surface electrospray printing device based on real-time plasma processing, which comprises an electrospray printing assembly and a plasma assembly, the electrospray printing assembly and the plasma assembly work synchronously; the electrospray printing assembly is used for delivering ink to a nozzle to form a jet; the plasma assembly is used for processing an insulating surface with a ring-shaped plasma beam to inject a polarized group into the insulating surface, the polarized group generates a negative polarity charge under the action of an electrospray printing electric field, and the residual charge of the ink and the polarization charge of the insulating surface are neutralized to realize stable jet / drop deposition of the ink on the insulating surface.

[0007] Further, the electrospray printing assembly comprises a clamping groove base, a press buckle, an ink supply chuck, a syringe, a needle plug, a glass nozzle and an electrospray printing electrode, the press buckle is connected to the clamping groove base; the ink supply chuck is arranged on one end of the clamping groove base and clamped to one end of the syringe; the syringe is located between the press buckle and the clamping groove base; the needle plug is connected to the syringe and the glass nozzle at opposite ends, and a through hole is arranged in the needle plug to communicate the syringe and the glass nozzle; the electrospray printing electrode is arranged in the glass nozzle and used for applying voltage to build an electrospray printing electric field.

[0008] Further, the plasma assembly is connected to the clamping groove base, and the glass nozzle is located in the plasma assembly.

[0009] Further, the plasma assembly further comprises a tower joint, a cover plate, an upper body, a lower body, an inner dielectric tube, an outer dielectric tube and a protective shell, the tower joint is arranged on the cover plate, the upper body connects the cover plate and the lower body, and the lower body is connected to the protective shell; the inner dielectric tube is threadedly connected to the upper body, the outer dielectric tube is threadedly connected to the lower body, and the inner dielectric tube is sleeved in the outer dielectric tube.

[0010] Further, the plasma assembly is connected to the clamping groove base through the cover plate, a first threaded hole and a first through hole are formed in the cover plate, the first through hole and the first threaded hole both penetrate the cover plate, the tower joint is threadedly connected with the first threaded hole, so that the tower joint is threadedly connected with the cover plate; the first through hole is used for accommodating part of the syringe and the needle plug.

[0011] Further, the upper body is stepped, one end of which is provided with a first groove, the bottom surface of the first groove is provided with a second groove, and the bottom surface of the second groove is provided with a second through hole; the other end of the upper body is provided with a third through hole, a fourth through hole, an arc-shaped groove, a horizontal groove and a vertical groove, the third through hole and the fourth through hole both penetrate the upper body, and the third through hole and the fourth through hole penetrate the bottom surfaces of the two ends of the arc-shaped groove respectively to communicate with the arc-shaped groove; the arc-shaped groove communicates with the pagoda joint; the vertical groove penetrates the upper body, and the vertical groove intersects with one end of the horizontal groove and communicates with the horizontal groove.

[0012] Further, the inner medium pipe is stepped, one end of which is threadedly connected with the upper body; a first annular cavity is formed between the step of the inner medium pipe and the bottom surface of the first groove, a first high-voltage conductive ring and a second high-voltage conductive ring are arranged in the first annular cavity, and the first annular cavity communicates with the vertical groove; a first connecting hole is formed at the step of the inner medium pipe, the first connecting hole penetrates the outer circumferential surface of the inner medium pipe, and the first connecting hole communicates with the first annular cavity; meanwhile, the inner medium pipe is sleeved in the outer medium pipe, and the glass nozzle penetrates the inner medium pipe; a circumferential array of protrusions is arranged on the outer circumference of the inner medium pipe, the outer diameter of the circumferential array of protrusions is equal to the inner diameter of the outer medium pipe, and the circumferential array of protrusions is used to ensure the coaxiality of the inner medium pipe and the outer medium pipe.

[0013] Further, the lower body includes a first cylindrical segment, a tapered segment and a second cylindrical segment connected with each other, the diameter of the first cylindrical segment is greater than the diameter of the second cylindrical segment; one end of the lower body is provided with a third groove, the bottom surface of the third groove is provided with a fourth groove, the other end of the lower body is provided with a fifth groove, the bottom surface of the fifth groove is provided with a sixth groove, the bottom surface of the sixth groove is provided with a fifth through hole, and the fifth through hole penetrates the bottom surface of the fourth groove; a second linear hole is formed in the wall of the fifth groove in the radial direction; the small end of the upper body is accommodated in the third groove, and abuts against the bottom surface of the third groove; the third through hole and the fourth through hole respectively communicate with the fourth groove; one end of the outer medium pipe is located in the fifth groove and the sixth groove; an annular boss is arranged on the outer circumference of the outer medium pipe, a second annular cavity is formed between the annular boss and the bottom surface of the fifth groove, the second annular cavity is used to accommodate a first grounding conductive ring and a second grounding conductive ring; the second linear hole communicates with the second annular cavity; the annular boss is further provided with a second connecting hole, and the second connecting hole communicates with the second annular cavity.

[0014] Further, one end of the protective shell is formed with a tapered slot, and the other end is formed with a through slot, which is communicated with the tapered slot; the tapered slot is used for accommodating the tapered section; the through slot is communicated with the second connecting hole; the protective shell is further formed with a radially arranged first wire hole, which is communicated with the second wire hole; an annular flow channel is formed between the inner medium tube and the outer medium tube, and the annular flow channel is in a whole trumpet shape; a high-voltage electrode is arranged on the outer circumferential surface of the inner medium tube and is arranged adjacent to the outlet of the annular flow channel; a grounding electrode is arranged on the outer wall of the outer medium tube, and the grounding electrode is located at the same height as the high-voltage electrode; one end of a first high-voltage lead wire penetrates through the horizontal slot, the vertical slot and then enters the first annular cavity to be connected with the first high-voltage conducting ring; one end of a second high-voltage lead wire penetrates through the annular flow channel, the fourth recess and the first connecting hole and then enters the first annular cavity to be connected with the second high-voltage conducting ring; one end of a first grounding lead wire penetrates through the first wire hole, the second wire hole and then enters the second annular cavity to be connected with the first grounding conducting ring; one end of a second grounding lead wire penetrates through the through slot, the fifth recess and the second connecting hole and then enters the second annular cavity to be connected with the second grounding conducting ring.

[0015] The application further provides an insulating surface electric jet printing method based on real-time plasma processing.

[0016] Overall, compared with the prior art, the insulating surface electric jet printing device and method based on real-time plasma processing provided by the application mainly have the following beneficial effects:

[0017] 1. The device provided by the application generates an annular plasma jet and ensures its uniformity, realizes large-diameter plasma surface processing, uses plasma to inject polar groups into an insulating surface, effectively utilizes the timeliness of polar groups, uses an electric jet electric field to polarize groups to strengthen the electric field, synchronously deposits residual charges of ink and polarized charges of the insulating surface to rapidly neutralize and eliminate electric field distortion, and realizes stable jet deposition of ink jets / droplets on the insulating surface.

[0018] 2. The application uses negative polarity charges generated by polarization of polar groups as auxiliary electrodes to realize electrohydrodynamic flow and stable jetting without a grounding electrode, and realizes breakthrough from nothing to something in electrofluidic jet printing of a high-dielectric thick insulating substrate and conductive support.

[0019] 3. The application realizes synchronous plasma processing of an insulating surface and electrofluidic jet printing, integrates processes, and greatly improves the printing efficiency of a large-area surface. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of an insulation surface electric inkjet printing device based on real-time plasma processing provided by the present application;

[0021] Figure 2 is a cross-sectional view of the insulation surface electric inkjet printing device based on real-time plasma processing in Figure 1

[0022] Figure 3 is a cross-sectional view of the insulation surface electric inkjet printing device based on real-time plasma processing in Figure 1

[0023] Figure 4 is a top view of the lower body of the insulation surface electric inkjet printing device based on real-time plasma processing in Figure 1

[0024] Figure 5 is a partial schematic diagram of the insulation surface electric inkjet printing device based on real-time plasma processing in Figure 1

[0025] Figure 6 is a printing effect diagram of the insulation surface electric inkjet printing device based on real-time plasma processing in Figure 1

[0026] In all the drawings, the same reference signs are used to represent the same elements or structures, wherein: 1 - clamping groove base, 2 - press buckle, 3 - syringe, 4 - ink supply chuck, 5 - needle bolt, 6 - glass nozzle, 7 - electric inkjet electrode, 8 - tower joint, 9 - cover plate, 10 - upper body, 11 - lower body, 12 - inner medium tube, 13 - outer medium tube, 14 - protective shell, 15 - set screw, 16 - first high-voltage conductive ring, 17 - second high-voltage conductive ring, 18 - high-voltage electrode, 19 - first high-voltage lead, 20 - second high-voltage lead, 21 - first grounding conductive ring, 22 - second grounding conductive ring, 23 - grounding electrode, 24 - first grounding lead, 25 - second grounding lead, 26 - ink, 27 - inert gas, 28 - plasma jet, 29 - insulation substrate, 30 - insulation substrate surface, 31 - polar group. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other. ​​​​​

[0028] The application provides an insulating surface electro-spraying device based on real-time plasma processing, which adopts a ring-shaped plasma beam to process an insulating surface, improves the electrical properties of the insulating surface, injects polarized groups into the insulating surface, inhibits the accumulation of charges on the insulating surface, accelerates the dissipation of insulating charges, and simultaneously opens an electro-fluidic spraying device, so that the polarized groups produce negative polarity charges by the electro-spraying electric field when the polarized groups have not been largely dissipated, and then the space electric field is enhanced, and the residual charges of the deposited ink and the polarized charges of the insulating surface can be quickly neutralized to realize the stable jet / drop spraying deposition of the ink on the insulating surface, thereby solving the printing and forming problem of the complex micro-nano structure of the insulating substrate.

[0029] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the device comprises an electro-spraying assembly, a plasma assembly and a controller, the electro-spraying assembly is used for conveying ink 26 to a nozzle and applying a high-voltage waveform, thereby jetting a jet. The plasma assembly is used for conveying a working gas, applying a strong electric field to break down the working gas to discharge and thereby generate a ring-shaped plasma jet 28. The controller is used for controlling the plasma assembly and the electro-spraying assembly to work synchronously, so that the ring-shaped plasma jet 28 assists the electro-spraying assembly to realize the stable jet deposition of the ink on the insulating surface.

[0030] The electro-spraying assembly comprises a clamping groove base 1, a pressing buckle 2, an ink supply chuck 4, a needle bolt 5, a glass nozzle 6 and an electro-spraying electrode 7, and the pressing buckle 2 is connected to the clamping groove base 1. The ink supply chuck 4 is arranged on one end of the clamping groove base 1 and clamped to one end of a syringe 3. At the same time, the ink supply chuck 4 is used for connecting an external air pipe with the syringe 3, and gas is introduced into the air pipe to provide power for the ink 26. The syringe 3 is located between the pressing buckle 2 and the clamping groove base 1, a spring is arranged in the clamping groove base 1 to provide a pulling force for the pressing buckle 2, and the pressing buckle 2 is used for pressing the syringe 3 on the clamping groove base 1. The needle bolt 5 is connected to the syringe and the glass nozzle 6 at opposite ends, and a through hole is arranged in the needle bolt 5 to connect the syringe and the glass nozzle 6. The electro-spraying electrode 7 is arranged in the glass nozzle 6 and is used for applying a voltage to build an electro-spraying electric field. In this embodiment, the central axis of the syringe, the central axis of the needle bolt 5 and the central axis of the glass nozzle 6 coincide; the plasma assembly is connected to the clamping groove base 1, and the glass nozzle 6 is located in the plasma assembly.

[0031] The plasma assembly comprises a cone joint 8, a cover plate 9, an upper body 10, a lower body 11, an inner dielectric tube 12, an outer dielectric tube 13, a protective shell 14, a set screw 15, a first high-voltage conducting ring 16, a second high-voltage conducting ring 17, a high-voltage electrode 18, a first high-voltage lead 19, a second high-voltage lead 20, a first grounding conducting ring 21, a second grounding conducting ring 22, a grounding electrode 23, a first grounding lead 24, and a second grounding lead 25.

[0032] The plasma assembly is connected to the card slot base 1 through the cover plate 9. Two ear plates are arranged on the cover plate 9, which are hollow structures. The ear plates are connected to the card slot base 1 through screws, so that the plasma assembly and the electric jet printing assembly are connected together. The cover plate 9 is connected to the upper body 10. A first threaded hole and a first through hole are formed in the cover plate 9. The first through hole and the first threaded hole penetrate the cover plate 9. The cone joint 8 is threadedly connected to the first threaded hole, so that the cone joint 8 is threadedly connected to the cover plate 9. The first through hole is used to accommodate part of the syringe and the needle plug 5.

[0033] The upper body 10 is threadedly connected to the lower body 11. The upper body 10 is stepped, and one end thereof is provided with a first recess. The bottom surface of the first recess is provided with a second recess, and the bottom surface of the second recess is provided with a second through hole. In this embodiment, the central axis of the first recess, the central axis of the second recess, and the central axis of the second through hole coincide. The other end of the upper body 10 is provided with a third through hole, a fourth through hole, an arc-shaped groove, a horizontal groove, and a vertical groove. The third through hole and the fourth through hole penetrate the upper body 10, and the third through hole and the fourth through hole penetrate the bottom surfaces of the two ends of the arc-shaped groove opposite to each other, so as to communicate with the arc-shaped groove. The arc-shaped groove communicates with the cone joint 8. The vertical groove penetrates the upper body 10, and the vertical groove communicates with one end of the horizontal groove.

[0034] The upper body 10 is stepped, and the end provided with the first recess is a small end, and the other end is a large end. An outer thread is arranged on the outer peripheral surface of the small end, and an inner thread is arranged on the inner wall surface of the second recess. The upper body 10 is threadedly connected to the lower body 11 and the inner dielectric tube 12 through the outer thread and the inner thread, respectively.

[0035] The inner medium tube 12 is stepped, and one end thereof is threadedly connected with the upper body 10. A first annular cavity is formed between the step of the inner medium tube 12 and the bottom surface of the first groove, and the first high-voltage conducting ring 16 and the second high-voltage conducting ring 17 are arranged in the first annular cavity. The first annular cavity is in communication with the vertical groove. A first connecting hole is formed at the step of the inner medium tube 12, and the first connecting hole penetrates the outer circumferential surface of the inner medium tube 12 and is in communication with the first annular cavity. Meanwhile, the inner medium tube 12 is sleeved in the outer medium tube 13, and the glass nozzle 6 penetrates the inner medium tube 12. A circumferential array of protrusions is arranged on the outer circumference of the inner medium tube 12, and the outer diameter of the circumferential array of protrusions is equal to the inner diameter of the outer medium tube 13. The circumferential array of protrusions is used to ensure the coaxiality of the inner medium tube 12 and the outer medium tube 13. The protective shell 14 is used to shield the electric field to prevent the internal electric field from affecting other components.

[0036] The lower body 11 comprises a first cylindrical segment, a tapered segment and a second cylindrical segment connected with each other, and the diameter of the first cylindrical segment is greater than that of the second cylindrical segment. One end of the lower body 11 is provided with a third groove, the bottom surface of the third groove is provided with a fourth groove, the other end is provided with a fifth groove, the bottom surface of the fifth groove is provided with a sixth groove, the bottom surface of the sixth groove is provided with a fifth through hole, and the fifth through hole penetrates the bottom surface of the fourth groove. A second radial through hole is formed in the wall of the fifth groove. The small end of the upper body 10 is accommodated in the third groove and abuts against the bottom surface of the third groove. The third through hole and the fourth through hole are respectively in communication with the fourth groove. The inner wall of the sixth groove is provided with an internal thread, and the lower body 11 is threadedly connected with the outer medium tube 13 through the internal thread. One end of the outer medium tube 13 is located in the fifth groove and the sixth groove. An annular boss is arranged on the outer circumference of the outer medium tube 13, a second annular cavity is formed between the annular boss and the bottom surface of the fifth groove, and the first grounding conducting ring 21 and the second grounding conducting ring 22 are accommodated in the second annular cavity. The second through hole is in communication with the second annular cavity. The annular boss is also provided with a second connecting hole, and the second connecting hole is in communication with the second annular cavity.

[0037] One end of the protective shell 14 is formed with a tapered slot, and the other end is formed with a through slot which is communicated with the tapered slot. The tapered slot is used to accommodate the tapered section. The through slot is communicated with the second connecting hole. The protective shell 14 is further formed with a radially arranged first wire hole which is communicated with the second wire hole and coaxial with the second wire hole. The outer medium pipe 13 passes through the through slot, and the inner medium pipe 12 is arranged in a spaced manner with the outer medium pipe 13. The outer medium pipe 13 is arranged in a spaced manner with the slot wall of the through slot. The annular flow channel is formed between the inner medium pipe 12 and the outer medium pipe 13, and the annular flow channel is in a whole trumpet shape with the flared end away from the injection cylinder, i.e. the lower end of the annular flow channel is outwardly inclined.

[0038] The high-voltage electrode 18 is arranged on the outer circumferential surface of the inner medium pipe 12 and is arranged adjacent to the outlet of the annular flow channel. The ground electrode 23 is arranged on the outer wall of the outer medium pipe 13, and the ground electrode 23 is at the same height as the high-voltage electrode 18. The ground electrode 23 and the high-voltage electrode 18 are both located in the through slot.

[0039] One end of the first high-voltage lead 19 passes through the transverse slot, the vertical slot and then enters the first annular cavity to be connected with the first high-voltage conducting ring 16. One end of the second high-voltage lead 20 passes through the annular flow channel, the fourth groove and the first connecting hole and then enters the first annular cavity to be connected with the second high-voltage conducting ring 17. One end of the first ground lead 24 passes through the first wire hole and the second wire hole and then enters the second annular cavity to be connected with the first ground conducting ring 21. One end of the second ground lead 25 passes through the through slot, the fifth groove and the second connecting hole and then enters the second annular cavity to be connected with the second ground conducting ring 22. The high-voltage electrode 18 is connected with the other end of the second high-voltage lead 20, and the ground electrode 23 is connected with the other end of the second ground lead 25.

[0040] In the embodiment, a stop threaded hole is formed on one side of the protective shell 14, and a stop screw 15 is installed in the stop threaded hole to connect the protective shell 14 to the lower main body 11. When the upper main body 10 is connected with the inner medium pipe 12, the first high-voltage conducting ring 16 is communicated with the second high-voltage conducting ring 17 to realize that the circuit of the high-voltage electrode 18 is led out from the first high-voltage lead 19. When the lower main body 11 is connected with the outer medium pipe 13, the first ground conducting ring 21 is communicated with the second ground conducting ring 22 to realize that the circuit of the ground electrode 23 is led out from the first ground lead 24.

[0041] In the embodiment, the material of the cone joint 8, the material of the cover plate 9, the material of the upper body 10, the material of the lower body 11, the material of the inner medium tube 12, the material of the outer medium tube 13 and the material of the protective shell 14 are all high dielectric materials, and nylon is specifically selected; the material of the first high-voltage lead 19, the material of the second high-voltage lead 20, the material of the high-voltage electrode 18, the material of the first grounding lead 24, the material of the second grounding lead 25 and the material of the grounding electrode 23 are all high-conductivity copper; the electric ink selected for the electric inkjet is a nano-conductive silver paste with a viscosity of 100 cp; and the inert gas 27 is helium.

[0042] Please refer to Figure 5 and Figure 6 The application also provides an insulating surface electric inkjet printing method based on real-time plasma processing, which is printed by using the insulating surface electric inkjet printing device based on real-time plasma processing.

[0043] The high-voltage electrode 18, the grounding electrode 23 and the outer medium tube 13 form a DBD plasma discharge structure, an electric field is constructed by applying a high-voltage pulse to the high-voltage electrode 18, and the helium gas is excited to form a ring-shaped plasma jet 28.

[0044] The polar group 31 is polarized under the influence of the high voltage applied by the electric inkjet electrode 7, which can enhance the electric inkjet field, reduce the electric inkjet ejection voltage, focus the electric field, and neutralize the residual charge and the polarization charge after the ink 26 is deposited, so as to eliminate the interference of the residual charge.

[0045] The printing method mainly includes the following steps:

[0046] The helium gas is input into the cone joint 8 through the air pipe, is divided into two parts through the arc-shaped slot on the lower body 11, enters the ring-shaped cavity formed between the fourth recess and the upper body 10 through the vertical slot on the lower body 11, is buffered in the ring-shaped cavity, and then forms a ring-shaped jet in the ring-shaped flow channel.

[0047] The high-voltage electrode 18, the grounding electrode 23 and the outer medium tube 13 form a DBD plasma discharge structure, an electric field is constructed by applying a high-voltage pulse to the high-voltage electrode 18, and the helium gas is excited to form a ring-shaped plasma jet 28.

[0048] The annular plasma jet 28 reaches the insulating substrate 29 to realize the treatment of the insulating substrate surface 30, and the plasma is rapidly injected into the insulating substrate surface 30 with polar groups 31 during the treatment.

[0049] The electrospraying electrode 7 applies a direct current voltage with a voltage amplitude selected from 1 kV to 3 kV, the polar groups 31 are polarized under the influence of the electric field, the polarization charge enhances the electrospraying electric field, reduces the electrospraying voltage and enhances the stability of the electric field, the nano-conductive silver paste is ejected under the driving of the electric field, the residual charge after the deposition of the nano-conductive silver paste is neutralized with the polarization charge to eliminate the interference of the residual charge.

[0050] Those skilled in the art can easily understand that the above description is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An insulating surface electrospray printing device based on real-time plasma treatment, characterized in that: the device comprises an electrospray printing assembly and a plasma assembly, the electrospray printing assembly and the plasma assembly work synchronously; the electrospray printing assembly is used to deliver ink to a nozzle to form a jet; the plasma assembly is used to treat the insulating surface with a ring-shaped plasma beam to inject polarized groups into the insulating surface, the polarized groups generate negative polarity charges under the action of the electrospray printing electric field, and the residual charges of the ink and the polarization charges of the insulating surface are neutralized to realize stable jet / drop deposition of the ink on the insulating surface; the plasma assembly comprises an inner dielectric tube, an outer dielectric tube, a high-voltage electrode and a grounding electrode; the inner dielectric tube is sleeved in the outer dielectric tube; a ring-shaped flow channel is formed between the inner dielectric tube and the outer dielectric tube, the high-voltage electrode is arranged on the outer circumferential surface of the inner dielectric tube and is arranged adjacent to the outlet of the ring-shaped flow channel; the grounding electrode is arranged on the outer wall of the outer dielectric tube, and the grounding electrode and the high-voltage electrode are at the same height; the plasma assembly is used to deliver working gas, apply a strong electric field to break down the working gas to discharge and generate a ring-shaped plasma jet. The electrospray printing assembly comprises a clamping groove base, a press buckle, an ink supply chuck, a syringe, a needle plug, a glass nozzle and an electrospray printing electrode, the press buckle is connected to the clamping groove base; the ink supply chuck is arranged on one end of the clamping groove base and clamped to one end of the syringe; the syringe is located between the press buckle and the clamping groove base; the needle plug has two opposite ends connected to the syringe and the glass nozzle respectively, and a through hole is arranged in the needle plug to communicate the syringe and the glass nozzle; the electrospray printing electrode is arranged in the glass nozzle and used to apply voltage to build an electrospray printing electric field. The plasma assembly is connected to the clamping groove base, and the glass nozzle is located in the plasma assembly.

2. The real-time plasma treatment based insulating surface electrospinning apparatus as claimed in claim 1, wherein: The plasma assembly further comprises a tower joint, a cover plate, an upper body, a lower body and a protective shell, the tower joint is arranged on the cover plate, the upper body connects the cover plate and the lower body, and the lower body is connected to the protective shell; the inner dielectric tube is threadedly connected to the upper body, and the outer dielectric tube is threadedly connected to the lower body.

3. The real-time plasma treatment based insulating surface electrospinning apparatus of claim 2, wherein: The plasma assembly is connected to the clamping groove base through the cover plate, the cover plate is provided with a first threaded hole and a first through hole, the first through hole and the first threaded hole both penetrate the cover plate, the tower joint is threadedly connected with the first threaded hole, so that the tower joint is threadedly connected with the cover plate; the first through hole is used to accommodate part of the syringe and the needle plug.

4. The real-time plasma treatment based insulating surface electrospinning apparatus of claim 2, wherein: ​ 5. The real-time plasma treatment based insulating surface electrospinning apparatus as claimed in claim 4, wherein: ​ 6. The real-time plasma treatment based insulating surface electrospinning apparatus as claimed in claim 5, wherein: The upper body is stepped, one end of which is provided with a first groove, the bottom surface of the first groove is provided with a second groove, and the bottom surface of the second groove is provided with a second through hole; the other end of the upper body is provided with a third through hole, a fourth through hole, an arc-shaped groove, a horizontal groove and a vertical groove, the third through hole and the fourth through hole both penetrate the upper body, and the third through hole and the fourth through hole penetrate the bottom surfaces of the two ends of the arc-shaped groove respectively to communicate with the arc-shaped groove; the arc-shaped groove communicates with the pagoda joint; the vertical groove penetrates the upper body, and the vertical groove intersects with one end of the horizontal groove and communicates with the horizontal groove.

7. The real-time plasma treatment based insulating surface electrospinning apparatus as claimed in claim 6, wherein: The inner medium pipe is stepped, one end of which is threadedly connected with the upper body; a first annular cavity is formed between the step of the inner medium pipe and the bottom surface of the first groove, a first high-voltage conductive ring and a second high-voltage conductive ring are arranged in the first annular cavity, and the first annular cavity communicates with the vertical groove; a first connecting hole is formed at the step of the inner medium pipe, the first connecting hole penetrates the outer circumferential surface of the inner medium pipe, and the first connecting hole communicates with the first annular cavity; meanwhile, the inner medium pipe is sleeved in the outer medium pipe, and the glass nozzle penetrates the inner medium pipe; a circumferential array of protrusions is arranged on the outer circumference of the inner medium pipe, the outer diameter of the circumferential array of protrusions is equal to the inner diameter of the outer medium pipe, and the circumferential array of protrusions is used to ensure the coaxiality of the inner medium pipe and the outer medium pipe.

8. The real-time plasma treatment based insulating surface electrospinning apparatus as claimed in claim 7, wherein: The lower body comprises a first cylindrical segment, a conical segment and a second cylindrical segment connected with each other, the diameter of the first cylindrical segment is greater than the diameter of the second cylindrical segment; one end of the lower body is provided with a third groove, the bottom surface of the third groove is provided with a fourth groove, the other end of the lower body is provided with a fifth groove, the bottom surface of the fifth groove is provided with a sixth groove, the bottom surface of the sixth groove is provided with a fifth through hole, and the fifth through hole penetrates the bottom surface of the fourth groove; a second linear hole is formed in the groove wall of the fifth groove in the radial direction; the small end of the upper body is accommodated in the third groove, and abuts against the bottom surface of the third groove; the third through hole and the fourth through hole respectively communicate with the fourth groove; one end of the outer medium pipe is located in the fifth groove and the sixth groove; an annular boss is arranged on the outer circumference of the outer medium pipe, a second annular cavity is formed between the annular boss and the bottom surface of the fifth groove, and the second annular cavity is used to accommodate a first grounding conductive ring and a second grounding conductive ring; the second linear hole communicates with the second annular cavity; the annular boss is also provided with a second connecting hole, and the second connecting hole communicates with the second annular cavity.

9. The real-time plasma treatment based insulating surface electrospinning apparatus as claimed in claim 8, wherein: One end of the protective shell is formed with a tapered slot, and the other end is formed with a through slot, which is communicated with the tapered slot; the tapered slot is used for accommodating the tapered section; the through slot is communicated with the second connecting hole; the protective shell is further formed with a radially arranged first wire hole, which is communicated with the second wire hole; the annular flow channel is in a whole trumpet shape; one end of the first high-voltage lead wire passes through the horizontal slot, the vertical slot and then enters the first annular cavity to be connected with the first high-voltage conducting ring; one end of the second high-voltage conducting wire passes through the annular flow channel, the fourth recess and the first connecting hole and then enters the first annular cavity to be connected with the second high-voltage conducting ring; one end of the first grounding lead wire passes through the first wire hole, the second wire hole and then enters the second annular cavity to be connected with the first grounding conducting ring; one end of the second grounding lead wire passes through the through slot, the fifth recess and the second connecting hole and then enters the second annular cavity to be connected with the second grounding conducting ring.

10. An insulating surface electrospray printing method based on real-time plasma treatment, characterized by: The jet printing method uses the insulating surface electric jet printing device based on real-time plasma treatment according to any one of claims 1-9 for printing.

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