Mixed aerosol inkjet printing device and method

Abstract

The present invention discloses a hybrid aerosol inkjet printing device and method, relating to the field of aerosol inkjet printing. The device includes a gas flow control module, a dual atomization control module, and an aerosol hybrid focusing deposition forming module; the gas flow control module is connected to the dual atomization control module and the aerosol hybrid focusing deposition forming module respectively; the aerosol hybrid focusing deposition forming module includes a static mixer, a focusing chamber, and a nozzle; the dual atomization control module is connected to the static mixer; the static mixer is connected to the focusing chamber; the static mixer is used to uniformly mix the ink aerosol particles generated by the dual atomization control module; the gas flow control module is connected to the focusing chamber; and a nozzle is provided at one end of the focusing chamber away from the static mixer. The present invention achieves uniform mixing of multi-material sols.

Description

Technical Field

[0001] The present invention relates to the field of aerosol inkjet printing, and in particular to a mixed aerosol inkjet printing device and method. Background Art

[0002] In recent years, with the rapid advancement of science and technology, emerging technologies such as 5G, the Internet of Things, and 3D printing have developed rapidly, accelerating innovation in the aviation industry. The next generation of aviation products is moving towards intelligent, lightweight, and highly integrated features, with the concept of integrating various circuits and sensors directly onto complex surfaces of complex structures. Printed electronics, as an additive manufacturing method, has been widely used in a variety of fields, including thin-film transistors, solar cells, radio frequency identification, health monitoring, wearable electronics, the Internet of Things, and intelligent robotics. Compared with traditional photolithography, electroplating, and etching techniques, they are more affordable, more efficient, more flexible, and more environmentally friendly. Modern printed electronics technologies currently primarily include gravure printing, screen printing, 3D printing, and inkjet printing. Gravure and screen printing are cumbersome processes, result in significant material waste, and have high production costs. 3D printing and inkjet printing, as typical direct writing technologies, enable on-demand printing, are simple, and can be printed directly onto substrates. They are relatively mature and widely used technologies in the field of printed electronics.

[0003] Aerosol inkjet printing is a printing technology that has gradually emerged in recent years. It has been applied to circuit board printing, solar cells, three-dimensional structure manufacturing, conformal sensing and other fields. Compared with existing direct writing technology, it not only has the printing characteristics of typical direct writing technology such as non-contact and on-demand printing, but also has a higher printing resolution, which can reach 10μm. At the same time, it has good compatibility with inks. Theoretically, it can print normally in the viscosity range of 1-1000cp. At the same time, it has a wide range of material applications and can be applied to the printing of metals, ceramics, polymers, semiconductors, and biomaterials, enabling it to manufacture independent and free conformal structures, showing its great potential in the field of conformal printing.

[0004] Ink properties are the decisive factors in determining the performance of devices manufactured using aerosol inkjet printing. In order to adapt to different functional requirements, the ink formula needs to be adjusted based on the functional requirements. However, a single material generally has unique advantages in a certain aspect. When it comes to the multifunctional and high-performance requirements of device manufacturing, a single ink often cannot meet the requirements. Generally, two inks need to be mixed to achieve the multifunctional and high-performance requirements of the device. Currently, in aerosol inkjet printing, the ink mixing method generally adopts direct mixing and ultrasonic treatment to improve the uniformity of the ink. However, this method of directly mixing inks for aerosol inkjet printing has the following problems:

[0005] (1) Despite the use of ultrasonic treatment, due to the differences in the properties of different materials and ink systems, it is still impossible to ensure sufficient mixing. At the same time, the mixing of two inks will change the original solvent system and affect the final printing quality.

[0006] (2) Due to differences in material morphology and other properties, the atomization voltage required for inks of different materials is different. For example, sheet materials generally require a larger atomization voltage, while granular materials require a relatively smaller atomization voltage. When mixed inks are actually printed, a larger atomization voltage is required to ensure that all materials can be atomized normally. However, a larger atomization voltage will greatly increase the ink output, affecting the controllable adjustment of the entire printing process.

[0007] (3) Direct mixing can only meet the requirements of a specific ratio. When the mixing requirements of multiple different gradient ratios are required, the device needs to be disassembled and cleaned, and new ink needs to be added to complete the printing process. Real-time adjustment cannot be achieved.

[0008] (4) The current method cannot meet the needs of continuous printing, especially when it comes to circuit packaging. The original equipment must be cleaned and resin ink must be added for subsequent packaging, which greatly increases the complexity of the experiment.

[0009] Therefore, designing a multi-material, variable gradient aerosol inkjet printing method oriented to functional requirements and designing corresponding experimental equipment will be of great significance for further improving the application scenarios of aerosol inkjet printing technology. Summary of the Invention

[0010] The object of the present invention is to provide a mixed aerosol inkjet printing device and method to achieve uniform mixing of multi-material sols.

[0011] To achieve the above object, the present invention provides the following solutions:

[0012] A mixed aerosol inkjet printing device comprises: a gas flow control module, a dual atomization control module and an aerosol mixed focusing deposition forming module;

[0013] The gas flow control module is connected to the dual atomization control module and the aerosol mixing focusing deposition forming module respectively;

[0014] The aerosol mixing focusing deposition forming module includes a static mixer, a focusing chamber and a nozzle;

[0015] The dual atomization control module is connected to the static mixer; the static mixer is connected to the focusing chamber; the static mixer is used to uniformly mix the ink aerosol particles generated by the dual atomization control module; the gas flow control module is connected to the focusing chamber; a nozzle is provided at one end of the focusing chamber away from the static mixer.

[0016] Optionally, the aerosol mixing focused deposition forming module further includes a substrate and a moving platform; the substrate is arranged on the moving platform; the moving platform is used to control the movement of the substrate; and the nozzle prints on the substrate.

[0017] Optionally, the gas flow control module includes a gas storage device, a gas flow control system, a carrier gas transmission pipeline and a sheath gas transmission pipeline;

[0018] The gas storage device is connected to the gas flow control system; the gas flow control system is also connected to the carrier gas transmission pipeline and the sheath gas transmission pipeline respectively; the carrier gas transmission pipeline is also connected to the dual atomization control module; the sheath gas transmission pipeline is also connected to the focusing chamber.

[0019] Optionally, the dual atomization control module includes a left atomization control system, a left atomizer, a left atomization chamber, a left ink tank, a right atomization control system, a right atomizer, a right atomization chamber and a right ink tank;

[0020] The left ink tank is arranged in the left atomization chamber; a left atomizer is also arranged in the left atomization chamber; the left atomizer is used to atomize the left ink in the left ink tank; the left atomizer is connected to the left atomization control system; the left atomization system is used to control the left atomizer; the left ink tank is also connected to the gas flow control module and the static mixer respectively;

[0021] The right ink tank is arranged in the right atomization chamber; a right atomizer is also arranged in the right atomization chamber; the right atomizer is used to atomize the right ink in the right ink tank; the right atomizer is connected to the right atomization control system; the right atomization system is used to control the right atomizer; the right ink tank is also connected to the gas flow control module and the static mixer respectively.

[0022] Optionally, the carrier gas transmission pipeline includes a left carrier gas transmission pipeline and a right carrier gas transmission pipeline;

[0023] The left carrier gas transmission pipeline is connected to the gas flow control system and the left ink tank respectively;

[0024] The right carrier gas transmission pipeline is connected to the gas flow control system and the right ink tank respectively.

[0025] Optionally, the gas flow control module further includes an air intake pipeline;

[0026] The air intake pipeline is connected to the air storage device and the gas flow control system respectively.

[0027] Optionally, the aerosol mixing focused deposition forming module further includes a left-way valve and a right-way valve;

[0028] The left valve is arranged between the left ink tank and the static mixer; the right valve is arranged between the right ink tank and the static mixer.

[0029] Optionally, the material of the static mixer is tetrafluoroethylene.

[0030] A mixed aerosol inkjet printing method, the mixed aerosol inkjet printing method is applied to the mixed aerosol inkjet printing device, and the mixed aerosol inkjet printing method includes:

[0031] Obtain ink concentration and target mixing requirements;

[0032] calculating a ratio of deposition rates based on the ink concentration and target mixing requirements;

[0033] controlling the dual atomization control module to generate ink aerosol according to the ratio of the deposition rates;

[0034] The aerosol mixing, focusing, deposition and forming module is controlled to mix the ink aerosol module and perform inkjet printing.

[0035] Optionally, the calculation formula for the deposition rate ratio is:

[0036] W1V1=kW2V2

[0037] Where: W1 is the concentration of ink 1, V1 is the deposition rate of ink 1 under the set parameters, k is the target mass ratio of the materials, W2 is the concentration of ink 2, and V2 is the deposition rate of ink 2.

[0038] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0039] The hybrid aerosol inkjet printing device provided by the present invention includes: a gas flow control module, a dual atomization control module, and an aerosol hybrid focusing deposition forming module; the gas flow control module is respectively connected to the dual atomization control module and the aerosol hybrid focusing deposition forming module; the aerosol hybrid focusing deposition forming module includes a static mixer, a focusing chamber, and a nozzle; the dual atomization control module is connected to the static mixer; the static mixer is connected to the focusing chamber; the static mixer is used to uniformly mix the ink aerosol particles generated by the dual atomization control module; the gas flow control module is connected to the focusing chamber; and a nozzle is provided at one end of the focusing chamber away from the static mixer. The ink aerosol particles in the dual atomization control module are mixed by the static mixer, thereby achieving uniform mixing of the multi-material sol. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A schematic diagram of the mixed aerosol inkjet printing device provided by the present invention;

[0042] Figure 2 Schematic diagram of uniform mixing of two ink aerosol particles;

[0043] Figure 3 Schematic diagram of the static mixer structure;

[0044] Figure 4 A flow chart of a mixed aerosol inkjet printing method;

[0045] Figure 5 A schematic diagram of a deposition rate measurement device - ink well structure;

[0046] Figure 6 Print tracks for in-situ mixing of silver ink and RGO ink;

[0047] Figure 7 The local micromorphology of the in-situ mixed printing track of silver ink and RGO ink;

[0048] Figure 8 Selected EDS images of the in-situ mixed printing trajectory of silver ink and RGO ink.

[0049] Explanation of symbols:

[0050] 1-gas storage device, 2-air inlet pipeline, 3-gas flow control system, 4-left carrier gas transmission pipeline, 5-sheath gas transmission pipeline, 6-right carrier gas transmission pipeline, 7-left atomization control system, 8-left atomizer, 9-left atomizing medium, 10-left atomization chamber, 11-left ink tank, 12-left ink, 13-left carrier gas, 14-left valve, 15-right valve, 16-right atomization control system, 17-right atomizer, 18-right atomizing medium, 19-right atomization chamber, 20-right ink tank, 21-right ink, 22-right carrier gas, 23-static mixer, 24-sheath gas, 25-focusing chamber, 26-nozzle, 27-substrate, 28-moving platform, 29-left aerosol particles, 30-right aerosol particles. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] The object of the present invention is to provide a mixed aerosol inkjet printing device and method to achieve uniform mixing of multi-material sols.

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] like Figure 1 As shown, the present invention provides a mixed aerosol inkjet printing device, which includes: a gas flow control module, a dual atomization control module and an aerosol mixed focusing deposition forming module.

[0055] The gas flow control module is connected to the dual atomization control module and the aerosol mixing focusing deposition forming module respectively.

[0056] The aerosol mixing focusing deposition forming module includes: Figure 3 The static mixer 23, focusing chamber 25 and showerhead 26 are shown.

[0057] The dual atomization control module is connected to the static mixer 23; the static mixer 23 is connected to the focusing chamber 25; the static mixer 23 is used to uniformly mix the ink aerosol particles generated by the dual atomization control module, such as Figure 2 As shown; the gas flow control module is connected to the focusing chamber 25; a nozzle 26 is provided at one end of the focusing chamber 25 away from the static mixer 23.

[0058] The static mixer 23 is made of tetrafluoroethylene. It is used to uniformly mix the aerosol particles generated by the atomization of the two inks. Made of tetrafluoroethylene, it is highly corrosion-resistant, preventing damage to the mixer from different solvent components. Its surface is also covered with a non-stick nano-coating of silicone oligomers, effectively preventing aerosol particles from adhering to the mixer surface during the mixing process. The aerosol particles include left-path aerosol particles 29 and right-path aerosol particles 30. The focusing chamber 25 is used to focus the ink stream, converging and accelerating the ink stream carried by the carrier gas using an external sheath gas 24. The nozzle 26 is made of metal, ceramic, or plastic.

[0059] The aerosol hybrid focused deposition module also includes a substrate 27 and a movable platform 28. The substrate 27 is disposed on the movable platform 28. The movable platform 28 is used to control the movement of the substrate 27. The nozzle 26 prints on the substrate 27. The substrate 27 can be any substrate and can be replaced according to printing requirements. The movable platform 28 is used to control the movement of the substrate 27 to achieve the drawing of the printed pattern.

[0060] The gas flow control module includes a gas storage device 1, a gas flow control system 3, a carrier gas transmission pipeline and a sheath gas transmission pipeline 5; the gas storage device 1 is connected to the gas flow control system 3; the gas flow control system 3 is also connected to the carrier gas transmission pipeline and the sheath gas transmission pipeline 5 respectively; the carrier gas transmission pipeline is also connected to the dual atomization control module; the sheath gas transmission pipeline 5 is also connected to the focusing chamber 25.

[0061] Gas storage device 1 contains air, nitrogen, or a mixture of these gases. One end of the gas inlet line 2 is connected to the outlet of gas storage device 1, and the other end is connected to a gas flow control system 3, responsible for transmitting the gas to the flow control system for subsequent gas diversion. Gas flow control system 3 is used to control the flow rates of two carrier gases and one sheath gas. Direct regulation is employed, utilizing an internal flow meter within the system to collect flow signals from the regulating valves in each transmission pipeline and use these as feedback signals. An intelligent control algorithm is then used to generate control signals, which drive the regulating valves for flow regulation.

[0062] The dual atomization control module includes a left atomization control system 7 , a left atomizer 8 , a left atomization chamber 10 , a left ink tank 11 , a right atomization control system 16 , a right atomizer 17 , a right atomization chamber 19 and a right ink tank 20 .

[0063] The left ink tank 11 is disposed in the left atomization chamber 10. A left atomizer 8 is also disposed in the left atomization chamber 10. The left atomizer 8 is configured to atomize the left ink 12 in the left ink tank 11. The left atomizer 8 is connected to the left atomization control system 7. The left atomization system is configured to control the left atomizer 8. The left ink tank 11 is also connected to the gas flow control module and the static mixer 23. A left atomization medium 9 is disposed in the left atomization chamber 10, and the left ink 12 is disposed in the left ink tank 11.

[0064] The right ink tank 20 is disposed in the right atomization chamber 19; a right atomizer 17 is also disposed in the right atomization chamber 19; the right atomizer 17 is used to atomize the right ink 21 in the right ink tank 20; the right atomizer 17 is connected to the right atomization control system 16; the right atomization system is used to control the right atomizer 17; the right ink tank 20 is also connected to the gas flow control module and the static mixer 23, respectively. The right atomization medium 18 is disposed in the right atomization chamber 19, and the right ink 21 is disposed in the right ink tank 20. The dual atomization control module employs ultrasonic atomization as the atomization method.

[0065] The atomization control system is used to control the atomization energy, generate an oscillation signal, and control its amplification factor. The atomizer receives the amplified oscillation signal and converts it into ultrasonic energy. The atomizing medium is water, which transmits the ultrasonic energy to the ink within the atomization chamber. The height of the atomizing medium should be higher than the height of the ink within the ink tank. Under the action of ultrasonic energy, the ink is atomized into small droplets. The formation of small droplets is primarily the result of the instability of capillary standing waves on the liquid surface and acoustic cavitation bubbles beneath the liquid surface. The droplet size ranges from 2 to 6 μm. To ensure effective ultrasonic atomization, the ink viscosity should be within the range of 0 to 20 cp.

[0066] The aerosol mixing focusing deposition forming module includes a left carrier gas 13, a right carrier gas 22, a left valve 14, a right valve 15, a static mixer 23, a focusing chamber 25, a sheath gas 24, a nozzle 26, a substrate 27 and a moving platform 28.

[0067] The carrier gas transmission pipeline includes a left carrier gas transmission pipeline 4 and a right carrier gas transmission pipeline 6. The left carrier gas transmission pipeline 4 is connected to the gas flow control system 3 and the left ink tank 11, respectively. The right carrier gas transmission pipeline 6 is connected to the gas flow control system 3 and the right ink tank 20, respectively. The left carrier gas 13 in the left carrier gas transmission pipeline 4 enters the static mixer 23 through the left ink tank 11, and the right carrier gas 22 in the right carrier gas transmission pipeline 6 enters the static mixer 23 through the right ink tank 20.

[0068] The gas flow control module further includes an air intake pipeline 2 ; the air intake pipeline 2 is connected to the gas storage device 1 and the gas flow control system 3 respectively.

[0069] The aerosol mixing focused deposition module also includes a left valve 14 and a right valve 15. The left valve 14 is disposed between the left ink tank 11 and the static mixer 23, while the right valve 15 is disposed between the right ink tank 20 and the static mixer 23. The left valve 14 and the right valve 15 are used to control the opening and closing of the left and right pipelines to meet the requirements of single-material and multi-material printing.

[0070] To achieve flexibility in gas transmission and ease of maintenance, the transmission pipelines are all made of flexible hoses, including one or more of PU hoses, rubber hoses, and hybrid hoses. The transmission pipelines include a left carrier gas transmission pipeline 4, a right carrier gas transmission pipeline 6, and a sheath gas transmission pipeline 5.

[0071] This invention achieves uniform mixing of multi-material sols, enabling rapid printing, and real-time control based on functionality. The mixing ratio can be adjusted in real time according to demand, simplifying the current multi-material gradient printing process. The mixing process does not damage the materials, achieves a high degree of homogenization, and simplifies the printing process. It also eliminates the cumbersome process of existing material and circuit packaging, achieving rapid packaging.

[0072] The present invention can achieve aerosol inkjet printing of uniformly mixed materials and is particularly suitable for rapid packaging of materials. Specific advantages are as follows:

[0073] (1) The static mixer effectively achieves mixed printing of different ink components, ensuring printing uniformity and effectively solving the problems of ink system changes and printing parameter mismatch caused by direct mixing. The nano-coating of the static mixer effectively avoids the viscosity problem of the ink.

[0074] (2) It makes multi-material mixed printing possible and is widely applicable to conductive ink, dielectric ink, nanoparticle ink, sheet material ink and mixed printing, further expanding the application range of aerosol inkjet printing. At the same time, it can achieve multi-gradient and multi-ratio continuous printing according to target requirements, avoiding multiple disassembly and cleaning work.

[0075] (3) It provides a new method for the rapid packaging of materials. After the material is printed, it only needs to start the printing of the packaging material to quickly complete the packaging, without the need for unnecessary processes such as changing ink.

[0076] The present invention also provides a mixed aerosol inkjet printing method, which is applied to the mixed aerosol inkjet printing device, and includes:

[0077] Get ink concentration and target mixing requirements.

[0078] The ratio of deposition rates is calculated based on the ink concentrations and target mixing requirements.

[0079] The dual atomization control module is controlled according to the ratio of the deposition rates to generate ink aerosol.

[0080] The aerosol mixing, focusing, deposition and forming module is controlled to mix the ink aerosol module and perform inkjet printing.

[0081] The calculation formula of the deposition rate ratio is:

[0082] W1V1=kW2V2

[0083] Where: W1 is the concentration of ink 1, V1 is the deposition rate of ink 1 under the set parameters, k is the target mass ratio of the materials, W2 is the concentration of ink 2, and V2 is the deposition rate of ink 2.

[0084] The present invention also provides a specific workflow of the mixed aerosol inkjet printing method in practical application, and the steps are as follows:

[0085] Step 1: Design of motion trajectory: Use Auto CAD software to model the printing trajectory, use path planning analysis software to perform path analysis on the established model, and output G code.

[0086] Step 2: Add ink and calculate ink volume: Shake the different inks thoroughly, use a pipette to add 1-1.5ml of ink to the ink tanks on the left and right sides respectively, connect all the pipes, and calculate the deposition rate ratio based on the ink concentration and target mixing requirements.

[0087] Step 3: Pre-debugging of the left-path printing system: Close the right-path valve, open the left-path valve, the left-path atomization control system, and the gas storage device, adjust the atomization voltage, the left-path carrier gas flow rate, and the sheath gas flow rate until the morphology is stable and measure its deposition rate, then adjust the left-path carrier gas flow rate to 0, and keep the sheath gas flow rate unchanged.

[0088] Step 4: On-demand debugging of the right-path printing system: Close the left-path valve, open the right-path valve and the right-path atomization control system, adjust the atomization voltage, the right-path carrier gas flow rate, and the sheath gas flow rate until the morphology is stable, then adjust the carrier gas flow rate to the target deposition rate, further adjust the right-path carrier gas flow rate to 0, and keep the sheath gas flow rate unchanged.

[0089] Step 5: Multi-material, variable gradient mixed printing: Open the left and right valves at the same time, adjust the left and right carrier gas flow rates and sheath gas flow rates according to the pre-adjustment parameters in steps 3 and 4, and compile the G code at the same time to achieve multi-material, variable gradient mixed ink printing.

[0090] Step 6: Removal of residual liquid and subsequent cleaning: After printing is completed, turn off the carrier gas flow and atomization, keep the sheath gas open for a while, and use the sheath gas flow to remove the residual aerosol in the device and clean the device.

[0091] The calculation formula of the deposition rate ratio in step 2 is as follows:

[0092] W1V1=kW2V2

[0093] Where: W1 is the concentration of ink 1, V1 is the deposition rate of ink 1 under certain parameters, k is the target mass ratio of the materials, W2 is the concentration of ink 2, and V2 is the deposition rate of ink 2.

[0094] The deposition rate in step 2 is measured using an ink well method, specifically, filling an ink well with a fixed volume, and recording the time to calculate the deposition rate.

[0095] The reason why the sheath gas flow rate is not directly closed in steps 3 and 4 is to utilize the sheath gas to exhaust the ink in the device.

[0096] The present invention takes the mixed silver nanoparticle ink with a concentration of 1g / ml and the RGO ink with a concentration of 25mg / ml as an example and combines Figure 4-Figure 5 To illustrate, the mass ratio of RGO to silver in the final printed track is required to be 1:20. The specific steps are as follows:

[0097] Step 1: Design of motion trajectory: Use Auto CAD software to model the printing trajectory, use path planning analysis software to perform path analysis on the established model, and output G code.

[0098] Step 2: Adding Ink and Calculating Ink Volume: Take 1.3ml of silver nanoparticle ink and 1.3ml of RGO ink, shake thoroughly, and add them to the left ink tank 11 and right ink tank 20, respectively. Then connect all the pipes. According to the calculation formula W1V1=kW2V2, to ensure a 1:20 mass ratio of RGO to silver in the final printed track, the deposition rate of the RGO ink should be twice that of the silver nanoparticle ink.

[0099] Step 3: Pre-debugging of the left printing system: Close the right valve 15, open the left valve 14, the left atomization control system 7 and the gas storage device 1, adjust the atomization voltage to 25mV, the left carrier gas flow rate (20sccm) and the sheath gas flow rate (35sccm) until the morphology is stable and measure its deposition rate using the ink well. A single ink well is a cylindrical groove with a bottom radius of 200μm and a height of 400μm, such as Figure 5 As shown in the figure, the time required to fill a single ink well is 125.7s, and the deposition rate is calculated to be about 4×10 -4 mm 3 / s, the deposition rate of RGO ink should be adjusted to 8×10 -4 mm 3 After pre-commissioning, adjust the left carrier gas flow rate to 0, and keep the sheath gas flow rate unchanged.

[0100] Step 4: Debug the right-side printing system on demand: Close left-side valve 14, open right-side valve 15 and right-side atomization control system 16, adjust the atomization voltage to 30 mV, and then adjust the carrier gas flow rate to the target deposition rate. This means that it takes approximately 62.8 seconds to fill a single ink well, and the carrier gas flow rate is adjusted to 35 sccm. After debugging is complete, adjust the right-side carrier gas flow rate to 0, leaving the sheath gas flow rate unchanged.

[0101] Step 5: Multi-material, fixed-ratio mixed printing: Open the left valve 14 and the right valve 15 at the same time, adjust the left and right carrier gas flow rates and sheath gas flow rates to 20 sccm, 35 sccm, and 30 sccm respectively according to the pre-adjustment parameters of steps 3 and 4, and compile the G code at the same time to complete multi-material, fixed-ratio mixed ink printing.

[0102] Step 6: Removal of residual liquid and subsequent cleaning: After printing is completed, turn off the carrier gas flow and atomization, keep the sheath gas open for a while, and use the sheath gas flow to remove the residual aerosol in the device and clean the device.

[0103] The reason why the sheath gas flow rate is not directly closed in steps 3 and 4 is to utilize the sheath gas to exhaust the ink in the device.

[0104] The printed tracks were optically imaged using an ultra-depth-of-field microscope. Figure 6 As shown, it can be seen that the printed track has a good morphology. At the same time, the surface morphology was observed using a scanning electron microscope. The results are shown in Figure 7 As shown in the figure, it can be seen that silver nanoparticles are well mixed with RGO. In order to further confirm the effect of uniform mixing, elemental analysis of the selected area on the surface of the printed track was performed using EDS. The results are shown in Figure 8As shown, it can be seen that the three elements Ag, C and O are evenly distributed in the printing track, confirming the uniform mixing and deposition of the two inks. Figure 8 (a) is the element distribution diagram of Ag element. Figure 8 (b) in the figure is the element distribution of C element. Figure 8 (c) in the figure is the element distribution diagram of O element.

[0105] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the device of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hybrid aerosol inkjet printing device, characterized in that: include: Gas flow control module, dual atomization control module and aerosol mixing focusing deposition forming module; The gas flow control module is connected to the dual atomization control module and the aerosol mixing focusing deposition forming module respectively; The aerosol mixing focusing deposition forming module includes a static mixer, a focusing chamber and a nozzle; The dual atomization control module is connected to the static mixer; the static mixer is connected to the focusing chamber; the static mixer is used to uniformly mix the ink aerosol particles generated by the dual atomization control module; the gas flow control module is connected to the focusing chamber; A nozzle is provided at one end of the focusing chamber away from the static mixer; The mixed aerosol inkjet printing method uses the mixed aerosol inkjet printing device, and the method includes: Obtain ink concentration and target mixing requirements; calculating a ratio of deposition rates based on the ink concentration and target mixing requirements; controlling the dual atomization control module to generate ink aerosol according to the ratio of the deposition rates; The aerosol mixing, focusing, deposition and forming module is controlled to mix the ink aerosol and perform inkjet printing.

2. The hybrid aerosol inkjet printing device according to claim 1, characterized in that: The aerosol mixing focused deposition forming module also includes a substrate and a moving platform; the substrate is arranged on the moving platform; the moving platform is used to control the movement of the substrate; and the nozzle prints on the substrate.

3. The hybrid aerosol inkjet printing device according to claim 1, characterized in that: The gas flow control module includes a gas storage device, a gas flow control system, a carrier gas transmission pipeline and a sheath gas transmission pipeline; The gas storage device is connected to the gas flow control system; the gas flow control system is also connected to the carrier gas transmission pipeline and the sheath gas transmission pipeline respectively; the carrier gas transmission pipeline is also connected to the dual atomization control module; the sheath gas transmission pipeline is also connected to the focusing chamber.

4. The hybrid aerosol inkjet printing device according to claim 3, characterized in that: The dual atomization control module includes a left atomization control system, a left atomizer, a left atomization chamber, a left ink tank, a right atomization control system, a right atomizer, a right atomization chamber and a right ink tank; The left ink tank is arranged in the left atomization chamber; A left-path atomizer is also provided in the left-path atomization chamber; The left-path atomizer is used to atomize the left-path ink in the left-path ink tank; the left-path atomizer is connected to the left-path atomization control system; the left-path atomization control system is used to control the left-path atomizer; The left ink tank is also connected to the gas flow control module and the static mixer respectively; The right ink tank is arranged in the right atomization chamber; the right atomizer is also arranged in the right atomization chamber; The right-path atomizer is used to atomize the right-path ink in the right-path ink tank; the right-path atomizer is connected to the right-path atomization control system; the right-path atomization control system is used to control the right-path atomizer; The right ink tank is also connected to the gas flow control module and the static mixer respectively.

5. The hybrid aerosol inkjet printing device according to claim 4, characterized in that: The carrier gas transmission pipeline includes a left carrier gas transmission pipeline and a right carrier gas transmission pipeline; The left carrier gas transmission pipeline is connected to the gas flow control system and the left ink tank respectively; The right carrier gas transmission pipeline is connected to the gas flow control system and the right ink tank respectively.

6. The hybrid aerosol inkjet printing device according to claim 4, characterized in that: The gas flow control module also includes an air intake pipeline; The air intake pipeline is connected to the air storage device and the gas flow control system respectively.

7. The hybrid aerosol inkjet printing device according to claim 4, characterized in that: The aerosol mixing focusing deposition forming module further includes a left valve and a right valve; The left valve is arranged between the left ink tank and the static mixer; the right valve is arranged between the right ink tank and the static mixer.

8. The hybrid aerosol inkjet printing device according to claim 1, characterized in that: The material of the static mixer is tetrafluoroethylene.

9. A mixed aerosol inkjet printing method, characterized in that: The hybrid aerosol inkjet printing method is applied to the hybrid aerosol inkjet printing device according to any one of claims 1 to 8, and the hybrid aerosol inkjet printing method comprises: Obtain ink concentration and target mixing requirements; calculating a ratio of deposition rates based on the ink concentration and target mixing requirements; controlling the dual atomization control module to generate ink aerosol according to the ratio of the deposition rates; The aerosol mixing, focusing, deposition and forming module is controlled to mix the ink aerosol and perform inkjet printing.

10. The mixed aerosol inkjet printing method according to claim 9, characterized in that: The calculation formula of the deposition rate ratio is: W1V1=kW2V2 Where: W1 is the concentration of ink 1, V1 is the deposition rate of ink 1 under the set parameters, k is the target mass ratio of the materials, W2 is the concentration of ink 2, and V2 is the deposition rate of ink 2.

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