An electroblotting device for inducing a pre-printed functional layer jet

Abstract

The application belongs to the field of advanced manufacturing technology, and relates to an electro-spraying device for pre-printing a functional layer and inducing a jet flow, which comprises three parts of a spraying module, a visual detection module and an adsorption module. The jet flow sprayed based on the electro-hydrodynamic effect pre-prints a complex micro-nano functional structure layer pattern on a substrate, and then the size of the jet flow and the deposition position of the jet flow are induced under the action of an electric field force. The two spraying heads are jointly and cooperatively sprayed to quickly realize the spraying manufacturing of the same shape as the pre-printed functional layer. The pre-printed functional layer and the subsequent continuous jet flow of nano scale are fully bonded and solidified to form a composite micro-nano functional structure. The electro-spraying method changes the distribution of the electric field force of the substrate by using the pre-printed functional layer, ensures the deposition position accuracy of the jet flow, and reduces the process size error of the composite micro-nano functional structure. The method has the advantages of low equipment cost, simple process, short processing period and the like, optimizes the micro-nano functional structure, and improves the service performance and service life of the nano device.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of advanced manufacturing technology, and relates to an electric inkjet device for inducing jet flow by pre-printing a functional layer. BACKGROUND

[0002] Electric inkjet is a non-contact additive manufacturing technology, which uses fluid pressure to supply functional ink to the outlet of the needle, forms an initial droplet, and then applies a high voltage between the needle and the substrate. At this time, the droplet forms a Taylor cone under the combined action of electric field force, ink surface tension, gravity and viscous force. When the electric field force continues to increase, the droplet is ejected at the tip of the Taylor cone, forming a stable micro-nano jet. Electric inkjet is widely used in the manufacturing process of flexible display and micro-nano sensor due to its high processing precision, high material utilization rate, simple process and strong controllability, and has become a research hotspot in the field of micro-nano manufacturing.

[0003] However, the jet flow in the electric inkjet process is affected by fluid pressure, electric field force and liquid surface tension, and the flight of the jet flow is difficult to control. For printing complex pattern micro-nano functional structure, there are problems such as large structure size error and low jet flow deposition position precision. SUMMARY

[0004] In order to overcome the above-mentioned deficiencies of the electric inkjet manufacturing technology, the application provides an electric inkjet device for inducing jet flow by pre-printing a functional layer. First, the jet flow ejected based on the electrohydrodynamic effect pre-prints a complex micro-nano functional structure layer pattern on the substrate, and then the jet flow size and deposition position are induced under the action of electric field force. The double-nozzle joint coordination inkjet quickly realizes the inkjet manufacturing with the same shape as the pre-printed functional layer, and the pre-printed functional layer and the subsequent continuous jet flow are fully bonded and solidified to form a composite micro-nano functional structure. The electric inkjet device for inducing jet flow by pre-printing a functional layer has the advantages of low equipment cost, simple process and short processing cycle.

[0005] The technical scheme adopted by the application is:

[0006] The application discloses an electroblotting device for inducing jet flow of pre-printing functional layer. The device is used for preparing a pre-printing layer of micro-nano functional structure with complex patterns on a substrate by electrojet printing technology, pre-printing wiring contact angle, changing electric field force distribution on the substrate, inducing jet flow size and jet flow deposition position in the processing, and realizing preparation of the complex micro-nano functional structure by joint and coordinated electroblotting of double nozzles. The device comprises an electroblotting module, a visual detection module and an adsorption module. The electroblotting module comprises a first syringe, a piston, a syringe outer cylinder, a return spring, a rubber conduit, a first syringe pump, a second syringe, a second syringe pump, an upper computer, a platform substrate, an infrared heating lamp, pre-printing functional ink, functional ink, a voltage controller, a first nozzle, a first nozzle clamp, a second nozzle and a second nozzle clamp. The first syringe and the second syringe are composed of the same specifications of the piston, the syringe outer cylinder and the return spring. The piston of the first syringe and the piston of the second syringe are respectively fastened on the first syringe pump and the second syringe pump. The first syringe and the second syringe are communicated through the rubber conduit cavity. The pre-printing functional ink and the functional ink enter the first syringe and the second syringe under the action of the pressure of the first syringe pump and the second syringe pump and the return spring. One end of the first syringe and one end of the second syringe are respectively connected with the upper end of the first nozzle and the upper end of the second nozzle through plastic conduits. The front end of the first nozzle clamp and the front end of the second nozzle clamp are electrically conductive and clamp the first nozzle and the second nozzle, and the rear end is insulated and connected with the upper computer, so as to realize three-dimensional movement in space. The first nozzle and the second nozzle are made of conductive materials and are processed with jet holes at the head. The voltage controller is connected with an alternating power supply, the output end of the voltage controller is connected with the right end of the electrically conductive part of the first nozzle clamp and the second nozzle clamp, and the infrared heating lamp is connected with a direct current power supply and is powered by the direct current power supply. The lamp body is placed above the platform substrate, so that the light of the infrared heating lamp irradiates the whole electroblotting surface area and heats the upper surface of the electroblotting material. The upper computer controls the movement track and the movement speed of the first nozzle clamp and the second nozzle clamp, so that the first nozzle and the second nozzle move according to the expected planned route in space, and the complex micro-nano functional structure is electroblotted.

[0007] The visual detection module comprises an industrial camera, a substrate and real-time detection software. The industrial camera monitors the electroblotting process on the substrate in real time, transmits images to the upper computer, the upper computer processes the images, controls the first nozzle clamp and the second nozzle clamp to move, and realizes closed-loop connection of the whole electroblotting process. The infrared heating lamp not only heats the electroblotting process, but also plays a role in illumination.

[0008] The adsorption module comprises a platform, a platform substrate and an adsorption device. The platform substrate is fixed on the platform to form a whole, is fixed to the ground by the adsorption device, and the relative spatial position is always unchanged. The flatness of the upper surface of the platform substrate is 2-8 microns, and the adsorption device accurately fixes the substrate.

[0009] The pre-printing function layer induced jet flow is electroblotted by using the above device, and the steps are specifically as follows:

[0010] First, substrate fixation and initial image acquisition

[0011] First, turn on the infrared heating lamp and the adsorption device switch, and place the substrate on the platform base plate at the appropriate position. Then, the host computer adjusts the initial positions of the first nozzle and the second nozzle to the coordinate origin. The industrial camera is used to collect the image of the substrate and compare it with the planned route image. The printing speed and the initial position height of the first nozzle and the second nozzle are adjusted.

[0012] Second, stable electrojet flow formation

[0013] Two kinds of high-performance functional inks are selected. The functional inks are injected into the first nozzle and the second nozzle through the injection pump. The distance between the nozzle and the substrate is adjusted. The output current, pulse voltage and frequency of the voltage controller are adjusted. The industrial camera is used to observe the jet flow state. Finally, the functional ink at the nozzle forms a stable jet flow much smaller than the nozzle size.

[0014] Third, composite micro-nano functional structure printing

[0015] According to the shape of the micro-nano functional structure, a motion control program is written. First, the host computer controls the first nozzle clamp to act on the substrate to pre-print a complex micro-nano functional layer pattern. At the same time, the contact connected with the ground wire is printed. The distribution of the electric field force is changed. Under the action of the electric field force, the jet flow size and the jet flow deposition position are induced. Then, the host computer controls the second nozzle clamp to act. The double nozzles work simultaneously to speed up the printing speed. The printing and manufacturing of the same shape as the pre-printed complex micro-nano functional layer are realized. The composite micro-nano functional structure printing process is monitored by the industrial camera and the real-time monitoring software to ensure the stability of the jet flow.

[0016] Fourth, solidification and forming of micro-nano functional structure under the assistance of thermal field

[0017] The solidification of the functional ink during the printing process is heated by the infrared heating lamp. While the complex micro-nano functional structure pattern is printed, the area being printed below the jet flow is within the irradiation and heating range of the infrared heating lamp. The power of the infrared heating lamp is adjusted to make the structure printed on the substrate solidify and form rapidly. The composite micro-nano functional structure is obtained.

[0018] The beneficial effects of the present application are: the electric jet printing device using the pre-printing function layer to induce jet flow, realizes the printing and manufacturing of composite micro-nano functional structure, the jet flow ejected based on the effect of electrohydrodynamics pre-prints the complex micro-nano functional structure layer pattern on the substrate, and then induces the jet flow size and jet flow deposition position under the action of electric field force, the joint and coordinated printing of the double nozzle realizes the printing and manufacturing of the same shape as the pre-printing function layer, and the pre-printing function layer and the subsequent nano-scale continuous jet flow are fully bonded and solidified, forming the composite micro-nano functional structure. The electric jet printing device using the pre-printing function layer to induce jet flow has the advantages of low equipment cost, simple process, short processing cycle, etc. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is the schematic diagram of the electric jet printing device using the pre-printing function layer to induce jet flow in the embodiment of the present application.

[0020] Fig. 2 is the schematic diagram of printing composite micro-nano functional structure in the embodiment of the present application.

[0021] Fig. 3 is the sectional view of the syringe in the embodiment of the present application.

[0022] In the figure: 1 first syringe, 111 piston, 112 syringe outer cylinder, 113 reset spring, 114 rubber conduit, 2 first syringe pump, 3 second syringe, 4 second syringe pump, 5 industrial camera, 6 upper computer, 7 platform, 8 platform base plate, 9 substrate, 10 adsorption device, 11 infrared heating lamp, 12 pre-printing functional ink, 13 functional ink, 14 second nozzle, 141 second nozzle hole, 15 second nozzle clamp, 16 voltage controller, 17 first nozzle, 171 first nozzle hole, 18 first nozzle clamp. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application are described in detail below in combination with the technical solutions and the drawings. Referring to Figs. 1 to 3 .

[0024] The embodiment discloses an electric jet printing device using a pre-printing function layer to induce jet flow, which comprises a printing module, a visual detection module and an adsorption module. The device pre-prints a complex micro-nano functional structure layer pattern on a substrate by using electric jet printing technology, pre-prints a wiring contact angle, changes the electric field force distribution on the substrate, adjusts the printing parameters to obtain a nano-scale high-adhesion continuous jet flow much smaller than the inner diameter of the nozzle needle, the jet flow has high precision of process size and deposition position precision under the induction of the electric field force, the high-adhesion continuous jet flow is fully bonded and solidified with the pre-printed micro-nano functional structure layer, and the printing of the double nozzle is coordinated, so that the preparation of the required composite micro-nano functional structure is quickly realized.

[0025] Specifically, in the present embodiment, the jet printing module comprises a first syringe 1, a first syringe pump 2, a second syringe 3, a second syringe pump 4, an infrared heating lamp 11, a pre-printing functional ink 12, a functional ink 13, a first nozzle 17, a first nozzle clamp 18, a second nozzle 14 and a second nozzle clamp 15; the first syringe pump 2 and the second syringe pump 4 are powered by a 220V alternating current power supply, the first syringe 1 and the second syringe 3 are composed of the same specifications of the piston 111, the syringe outer cylinder 112 and the reset spring 113; the piston 111 of the first syringe 1 and the second syringe 3 is respectively fastened on the first syringe pump 2 and the second syringe pump 4; the first syringe 1 and the second syringe 4 are connected through the cavity of the rubber conduit 114; the pre-printing functional ink 12 and the functional ink 13 enter the first syringe 1 and the second syringe 3 under the action of the pressure of the first syringe pump 2 and the second syringe pump 4 and the reset spring 113; one end of the first syringe 1 and the second syringe 3 is respectively connected with the upper end of the first nozzle 17 and the second nozzle 14 through the plastic conduit; the front end of the first nozzle clamp 18 and the second nozzle clamp 15 is conductive and clamps the first nozzle 17 and the second nozzle 14, the rear end is insulated and connected with the upper computer 6, and three-dimensional motion O xyz is realized in space; the first nozzle 17 and the second nozzle 14 are made of conductive materials, and the head is processed with the first nozzle hole 171 and the second nozzle hole 141; the voltage controller 16 is connected with the 220V alternating current power supply, and the output end is connected with the right end of the conductive part of the first nozzle clamp 18 and the second nozzle clamp 15; the infrared heating lamp 11 is connected with the 0-30V direct current power supply and is powered by the 0-30V direct current power supply, the lamp body is placed above the platform base plate 8, the light irradiates the entire jet printing surface area and heats the upper surface of the jet printing material; the upper computer 6 controls the motion trajectory and motion speed of the first nozzle clamp 18 and the second nozzle clamp 15 respectively, so that the first nozzle 17 and the second nozzle 14 move according to the expected planned route in space, and jet print complex micro-nano functional structures;

[0026] Specifically, in the present embodiment, the visual detection module comprises an industrial camera 5, a substrate 9 and real-time detection software; the industrial camera 5 monitors the jet printing process on the substrate 9 in real time, transmits the image to the upper computer 6, the upper computer 6 processes the image, controls the first nozzle clamp 18 and the second nozzle clamp 15 to act, and realizes the closed loop connection of the entire jet printing process; the infrared heating lamp 11 not only heats the jet printing process, but also plays a lighting role;

[0027] Specifically, in the present embodiment, the adsorption module comprises a platform 7, a platform base plate 8 and an adsorption device 10; the platform base plate 8 is fixed on the platform 7 to form a whole, is fixed to the ground by the adsorption device 10, and the relative spatial position is always unchanged, the flatness of the upper surface of the platform base plate 8 is 2-8 microns, and the adsorption device 10 precisely fixes the substrate 9.

[0028] To achieve the above object, the technical scheme adopted by the present application is:

[0029] The specific steps of the pre-printing function layer induced jet flow electroblotting using the above device are as follows:

[0030] First, substrate fixation and initial image acquisition

[0031] First, turn on the infrared heating lamp 11 and the adsorption device 10 switch, and place the substrate 9 on the platform base plate 8 at the appropriate position. Then, the upper computer 6 adjusts the initial position of the first nozzle 17 and the second nozzle 14 to the coordinate origin O. xy Through the industrial camera 5, the image of the substrate 9 is collected and compared with the planned route image, and the initial printing speed v o and the initial position height h o of the first nozzle 17 and the second nozzle 14 are adjusted.

[0032] Second, stable electrojet flow formation

[0033] Two kinds of high-performance nano-silver functional ink with a surface tension of 40 mN / m-90 mN / m and a viscosity of 2 cP-8 cP are selected. The pre-printing functional ink 12 and the functional ink 13 are injected into the first nozzle 17 and the second nozzle 14 through the first injection pump 2 and the second injection pump 4. The functional ink flow is set to 2.5 μl / min-5 μl / min, the distance between the first nozzle 171 and the second nozzle 141 and the substrate is adjusted to 4 mm-12 mm, the output AC pulse voltage of the voltage controller 16 is adjusted, the frequency is 20 Hz-100 Hz, the high voltage is 1000 V, and the industrial camera 5 is used to observe the jet flow state. Finally, the functional ink at the nozzle forms a stable jet flow much smaller than the size of the first nozzle 171 and the second nozzle 141.

[0034] Third, composite micro-nano functional structure printing

[0035] According to the shape of the micro-nano functional structure, a motion control program is written. First, the first nozzle clamp 18 is controlled by the upper computer 6 to move at a speed of 2 mm / s-6 mm / s to pre-print a complex micro-nano functional layer pattern on the substrate 9, while printing a contact connected to the ground wire, changing the distribution of the electric field force of the substrate 9, and inducing the jet flow size and jet flow deposition position under the action of the electric field force. Then, the second nozzle clamp 15 is controlled by the upper computer 6 to move at a speed of 4 mm / s-9 mm / s, and the double nozzles are jointly printed to quickly realize the printing of the same shape as the pre-printed complex micro-nano functional layer. The composite micro-nano functional structure printing process is monitored by the industrial camera 5 and real-time monitoring software to ensure the stability of the jet flow.

[0036] Fourth step, solidification of micro-nano functional structure under the assistance of thermal field

[0037] The solidification of functional ink in the jet printing process is heated by infrared heating lamp 11. While the complex micro-nano functional structure pattern is being printed, the area being printed under the jet is within the irradiation and heating range of infrared heating lamp 11. The power of infrared heating lamp 11 is adjusted to 240W-380W, so that the structure jet printed on substrate 9 is rapidly solidified and formed, and the required composite micro-nano functional structure is obtained.

Claims

1. An electroblotting device for pre-printing a functional layer induced jet, characterized in that, The used electric inkjet device includes three parts of inkjet module, visual detection module and adsorption module; its characterized in that the inkjet module includes first injector (1), piston (111), injector outer cylinder (112), reset spring (113), rubber conduit (114), first injector pump (2), second injector (3), second injector pump (4), host computer (6), platform base plate (8), infrared heating lamp (11), pre-printing functional ink (12), functional ink (13), voltage controller (16), first nozzle (17), first nozzle clamp (18), second nozzle (14) and second nozzle clamp (15); the first injector (1) and second injector (3) are composed of the same specification of piston (111), injector outer cylinder (112) and reset spring (113); the piston (111) of the first injector (1) and second injector (3) is respectively fastened on the first injector pump (2) and second injector pump (4); the first injector (1) and second injector (3) are communicated through the cavity of rubber conduit (114); the pre-printing functional ink (12) and functional ink (13) enter the first injector (1) and second injector (3) under the pressure of the first injector pump (2) and second injector pump (4) and the action of reset spring (113); one end of the first injector (1) and second injector (3) is respectively connected with the upper end of first nozzle (17) and second nozzle (14) through plastic conduit; the front end of first nozzle clamp (18) and second nozzle clamp (15) is conductive and clamps first nozzle (17) and second nozzle (14), and the rear end of the insulating part is connected with host computer (6), so as to realize three-dimensional movement in space; the first nozzle (17) and second nozzle (14) are made of conductive material, and the head is processed with first nozzle hole (171) and second nozzle hole (141); the voltage controller (16) is connected with alternating current power supply, and the output end is connected with the right end of the conductive part of first nozzle clamp (18) and second nozzle clamp (15); the infrared heating lamp (11) is connected with direct current power supply, is powered by direct current power supply, and is placed above the platform base plate (8), so that the light irradiates the entire inkjet surface area and heats the upper surface of the inkjet material; the host computer (6) controls the movement trajectory and movement speed of first nozzle clamp (18) and second nozzle clamp (15), so that first nozzle (17) and second nozzle (14) move according to the expected planned route in space, and the complex micro-nano functional structure is inkjetted; The visual detection module includes industrial camera (5), substrate (9) and real-time detection software; the industrial camera (5) monitors the inkjet process on the substrate (9) in real time, transmits the image to host computer (6), the host computer (6) processes the image, controls the action of first nozzle clamp (18) and second nozzle clamp (15), and realizes the closed-loop connection of the entire inkjet process; the infrared heating lamp (11) not only heats the inkjet process, but also plays a lighting role; The adsorption module comprises a platform (7), a platform base plate (8) and an adsorption device (10); the platform base plate (8) is fixed on the platform (7) to form an integral whole, is fixed to the ground through the adsorption device (10), and the relative spatial position is always unchanged; the adsorption device (10) precisely fixes the substrate (9); The electroblotting of the pre-printed functional layer induced jet flow is carried out by using the device, and the steps are as follows: First, substrate fixation and initial image acquisition Firstly, turn on the infrared heating lamp (11) and the adsorption device (10) switch, and place the substrate (9) on the platform base plate (8) at the appropriate position, and then adjust the initial position of the first nozzle (17) and the second nozzle (14) to the coordinate origin by the upper computer (6), and compare and analyze the image collected by the industrial camera (5) and the planned route image, and adjust the initial printing speed and initial position height of the first nozzle (17) and the second nozzle (14); Second, stable electroblotting flow formation Two kinds of high-performance nano-silver functional ink are selected, the surface tension is 40mN / m-90mN / m, the viscosity is 2cP-8cP, the pre-printed functional ink (12) and the functional ink (13) are injected into the first nozzle (17) and the second nozzle (14) through the first injection pump (2) and the second injection pump (4), the distance between the first nozzle (171) and the second nozzle (141) and the substrate is adjusted, the voltage and frequency output by the voltage controller (16) are adjusted, the jet flow state is observed by using the industrial camera (5), and finally the functional ink at the nozzle forms a stable jet flow which is much smaller than the size of the first nozzle (171) and the second nozzle (141); Third, composite micro-nano functional structure printing According to the shape of the micro-nano functional structure, a motion control program is written, first, the first nozzle clamp (18) is controlled by the upper computer (6) to act on the substrate (9) to pre-print a complex micro-nano functional layer pattern, and a contact connected with a ground wire is printed at the same time, the electric field force distribution of the substrate (9) is changed, the jet flow size and the jet flow deposition position are induced under the action of the electric field force, then the second nozzle clamp (15) is controlled by the upper computer (6) to act, the double nozzles work at the same time to speed up the printing speed, the printing of the same shape as the pre-printed complex micro-nano functional layer is realized, and the printing process is monitored by the industrial camera (5) and the real-time monitoring software to ensure the stability of the jet flow; Fourth, curing and forming of micro-nano functional structure under the assistance of thermal field The curing of the pre-printed functional ink (12) and the functional ink (13) in the printing process is heated by the infrared heating lamp (11), the area being printed below the jet flow is in the irradiation and heating range of the infrared heating lamp (11) while the complex micro-nano functional structure pattern is being printed, the power of the infrared heating lamp (11) is adjusted, the structure printed on the substrate (9) is rapidly cured and formed, and the required composite micro-nano functional structure is obtained.

Images