CN109094199B - Liquid electrode device for coaxial electrospray printing - Google Patents
Liquid electrode device for coaxial electrospray printing Download PDFInfo
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- CN109094199B CN109094199B CN201811134637.4A CN201811134637A CN109094199B CN 109094199 B CN109094199 B CN 109094199B CN 201811134637 A CN201811134637 A CN 201811134637A CN 109094199 B CN109094199 B CN 109094199B
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- electrode
- storage cavity
- printing
- coaxial
- liquid storage
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- 239000007788 liquid Substances 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000009825 accumulation Methods 0.000 claims abstract description 9
- 229920002379 silicone rubber Polymers 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims 1
- 229920005372 Plexiglas® Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000002086 nanomaterial Substances 0.000 description 5
- 239000011550 stock solution Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
The invention belongs to the technical field of advanced manufacturing, and provides a liquid electrode device for coaxial electrospray printing. The liquid electrode device is arranged under the coaxial spray head and mainly comprises a displacement platform, a cantilever bracket, an electrode liquid storage cavity, a metal polar plate, a heating plate, a lead and an electrode solvent. Before printing, a proper amount of electrode solvent is added into the electrode liquid storage cavity, a thin electrode liquid film is formed on the upper surface of the metal polar plate, and the electrode solvent is heated to a certain temperature by a heating sheet at the bottom of the electrode liquid storage cavity. In the printing process, an electric field is formed between the coaxial spray needle and the metal pole plate, the coaxial jet can firstly contact with an electrode liquid film before reaching the metal pole plate, the jet material is quickly dissolved and diffused, the problem of residual charges caused by material accumulation is avoided, jet whip caused by Coulomb repulsion force is eliminated, and the stability of the printing process and the consistency of the printing structure are improved.
Description
Technical Field
The invention belongs to the technical field of advanced manufacturing, relates to coaxial electrospray printing integrated platform equipment, and particularly relates to a liquid electrode device for coaxial electrospray printing.
Background
The electrospray printing technology based on the electrohydrodynamic effect is a manufacturing method for directly realizing a micro-nano structure on a substrate by utilizing the action of a local energy field, has outstanding potential and advantages in the aspects of manufacturing complex micro-nano structures, high depth-to-width ratio micro-nano structures and three-dimensional micro-nano structures, and becomes a research hotspot for manufacturing high-resolution structures in recent years. Electrospray printing has two modes, single cone-jet and coaxial cone-jet. In the coaxial electric jet printing mode, two incompatible materials form stable coaxial cone-jet flow at the outlet of the coaxial nozzle under the combined action of electric field force, mechanical force, surface tension, viscous force, internal pressure and the like. In this mode, the electric field force acts on the inner layer material and the outer layer high viscosity wrapping material which are not mutually soluble at the same time, and the two materials are driven to move towards the substrate. Meanwhile, viscous tangential force generated by the flow of the outer-layer high-viscosity wrapping material is superposed with electric field tangential force borne by the inner-layer functional material, composite constraint is acted on the inner-layer material, the diameter of the focused inner jet reaches the nanometer level, and the manufacture of a nanometer resolution structure is realized.
In the printing process, the material printed on the metal negative plate carries residual charges, the density of the residual charges is increased along with the accumulation of the material on the metal negative plate, the polarity of the residual charges is the same as that of charges on a coaxial jet flow two-phase interface, coulomb repulsive force is generated between charges with the same polarity, the coaxial jet flow whip is caused by the coulomb repulsive force, the whip phenomenon is more serious along with the increase of the density of the residual charges, the stability of the printing process and the consistency of a printing structure are reduced, and the phenomenon is particularly prominent when a nano-scale structure is printed.
Disclosure of Invention
The invention provides a liquid electrode device for coaxial electrospray printing, aiming at overcoming the problem of poor jet stability of coaxial electrospray printing in the prior art. The liquid electrode device is arranged under the coaxial spray head and mainly comprises a displacement platform, a cantilever bracket, an electrode liquid storage cavity, a metal polar plate, a heating plate, a lead and an electrode solvent.
Before printing, a proper amount of electrode solvent is added into the electrode liquid storage cavity, a thin electrode liquid film is formed on the upper surface of the metal polar plate, and the electrode solvent is heated to a certain temperature by a heating sheet at the bottom of the electrode liquid storage cavity. In the printing process, an electric field is formed between the coaxial spray needle and the metal pole plate, the coaxial jet can firstly contact with an electrode liquid film before reaching the metal pole plate, the jet material is quickly dissolved and diffused, the problem of residual charges caused by material accumulation is avoided, jet whip caused by Coulomb repulsion force is eliminated, and the stability of the printing process and the consistency of the printing structure are improved.
The technical scheme of the invention is as follows:
a liquid electrode device for coaxial electrospray printing comprises a displacement table 1, a cantilever bracket 2, an electrode liquid storage cavity 4, a metal polar plate 3, a heating plate 5, a lead 6 and an electrode solvent 7;
the metal polar plate 3 is pasted at the bottom inside the electrode liquid storage cavity 4 through waterproof silicon rubber and is connected with the grounding end of a high-voltage power supply; the heating sheet 5 is adhered to the bottom outside the electrode liquid storage cavity 4 through heat-conducting silicon rubber, is connected with a high-precision temperature controller and is used for adjusting the temperature of the electrode solvent 7; the electrode liquid storage cavity 4 is arranged in an annular structure at the end part of the cantilever bracket 2 and is fixed on the cantilever bracket 2 through a boss at the upper edge of the electrode liquid storage cavity 4, and the fixing mode is convenient for taking out the electrode liquid storage cavity 4 to clean internal residues after printing is finished; the other end of the cantilever bracket 2 is fixed on the displacement table 1 through threaded connection, and meanwhile, the center of an electrode liquid storage cavity 4 at the other end of the cantilever bracket 2 is ensured to be positioned under the coaxial spray head, and the distance between the liquid electrode device and the coaxial spray head is adjusted by utilizing the up-and-down movement of the displacement table 1; the coaxial spray head is connected with a high-voltage power supply and forms an electric field with the liquid electrode; before printing, a certain amount of electrode solvent 7 is injected into the electrode liquid storage cavity 4, a thin electrode liquid film is formed on the upper surface of the metal polar plate 3, and the electrode solvent 7 is mutually soluble with the coaxial jet flow outer-layer high-viscosity wrapping material; in the printing process, the coaxial jet flow can firstly contact with an electrode liquid film on the upper surface of the metal polar plate 3 before reaching the metal polar plate 3, the coaxial jet flow material can be quickly dissolved and diffused, the problem of charge accumulation caused by material accumulation is avoided, the instability of jet flow caused by Coulomb repulsion force is eliminated, and the stability of the printing process and the consistency of the printing structure are improved.
The cantilever bracket 2 is made of organic glass and is fixed on the displacement table 1 by a T-shaped structure at one end through threads; the other end of the annular structure is used for fixing the electrode liquid storage cavity 4.
The electrode liquid storage cavity 4 is of a circular cavity structure made of polytetrafluoroethylene, and the insulating material can eliminate the interference of the electrode liquid storage cavity on a printing electric field. The upper edge of the cavity is provided with a boss, the whole electrode liquid storage cavity 4 can be fixed in the annular structure of the cantilever bracket 2 through the boss structure, the cavity is 10mm deep, and the electrode solvent 7 is held in the cavity. The round sheet metal polar plate 3 is adhered to the bottom inside the electrode liquid storage cavity 4 by waterproof silicon rubber glue and is connected with the grounding end of a high-voltage power supply through a lead 6. Circular slice silica gel electric heat piece 5 utilizes heat conduction silicon rubber sticky 4 outside bottoms in electrode stock solution chamber, links to each other with high accuracy temperature controller through wire 6 for adjust 7 temperatures of electrode solvent. After installation, the center of the electrode liquid storage cavity 4 is positioned under the coaxial spray head, the coaxial spray head is connected with the output end of the high-voltage power supply, and an electric field required by printing is formed between the coaxial spray head and the liquid electrode.
The liquid electrode device for coaxial electrospray printing has the advantages that on the premise of ensuring an electric field required by printing, the electrode liquid film formed on the upper surface of the metal negative plate is utilized to quickly dissolve jet flow materials, and the jet flow materials are prevented from being accumulated on the electrode plate, so that jet flow whip caused by accumulated charges and Coulomb repulsive force is effectively eliminated, jet flow stability is improved, and printing structure consistency is improved.
Drawings
FIG. 1 is an assembly view of a liquid electrode device for coaxial electrospray printing.
In the figure: 1, a displacement table; 2, a cantilever bracket; 3, a metal polar plate; 4 electrode liquid storage cavity; 5 heating the sheet; 6, conducting wires; 7 electrode solvent.
Detailed Description
The following detailed description of the embodiments of the invention refers to the accompanying drawings.
A liquid electrode device for coaxial electrospray printing is shown in figure 1 and comprises a displacement table 1, a cantilever bracket 2, a metal polar plate 3, an electrode liquid storage cavity 4, a heating plate 5, a lead 6 and an electrode solvent 7.
The cantilever bracket 2 is made of organic glass material, one end of the cantilever bracket is of a T-shaped structure, the length of the head of the structure is 50mm, the width of the head of the structure is 20mm, two unthreaded holes are processed on two sides of the cantilever bracket, the aperture of the cantilever bracket is 5mm, and the cantilever bracket is fixed on the single-shaft displacement table 1 through bolts; the other end is of an annular structure, the inner diameter of the ring is 60mm, the outer diameter of the ring is 65mm, the electrode liquid storage cavity 4 is used for being placed, and the thickness of the whole cantilever bracket is 10 mm. Electrode stock solution chamber 4 is polytetrafluoroethylene material, and insulating material can avoid the interference to the printing electric field, and the structure is the circular chamber that the top edge has annular boss for hold electrode solvent 7. Circular chamber internal diameter 55mm, external diameter 60mm, dark 10mm, circular boss outward flange diameter 65mm can fix electrode liquid storage chamber 4 in cantilever bracket 2's loop configuration through this boss structure. The metal polar plate 3 is made of aluminum materials, is of a circular sheet structure, has the thickness of 0.5mm and the diameter of 55mm, is adhered to the bottom inside the electrode liquid storage cavity 4 by utilizing waterproof silicon rubber, and is connected with a grounding end of a high-voltage power supply through a lead 6. Heating plate 5 is the silica gel electric heat piece, circular sheet structure, and thickness 0.5mm, diameter 60mm utilize heat conduction silicon rubber to paste in 4 outside bottoms in electrode stock solution chamber, link to each other with high accuracy temperature controller through wire 6 for adjust the required temperature of electrode solvent 7. After the installation is finished, the center of the electrode liquid storage cavity 4 is positioned right below the coaxial spray head, the coaxial spray head is connected with the output end of the high-voltage power supply, and an electric field with the intensity required by printing is formed between the coaxial spray head and the liquid electrode. Before printing, a certain amount of electrode solvent 7 is injected into the electrode liquid storage cavity 4, the electrode solvent is mutually soluble with the coaxial jet flow outer layer material, and the electrode solvent forms a thin electrode liquid film on the upper surface of the metal polar plate 3. In the printing process, the coaxial jet flow is firstly contacted with a liquid film on the upper surface of the metal pole plate 3 before reaching the metal pole plate 3, the electrode solvent 7 of the coaxial jet flow outer layer high-viscosity wrapping material is rapidly dissolved and diffused, the problem of residual charge caused by material accumulation is avoided, the instability of jet flow caused by the residual charge due to Coulomb repulsion force is eliminated, and the stability of the printing process and the consistency of a printing structure are improved.
The invention provides a liquid electrode device for coaxial electrospray printing, which utilizes an electrode liquid film formed on the upper surface of a metal negative plate to quickly dissolve an outer-layer wrapping material and avoid the accumulation of the material on the plate, thereby effectively eliminating jet whip caused by the Coulomb repulsion force accumulated by residual charges, improving the jet stability and enhancing the stability of the printing process and the consistency of the printing structure.
Claims (3)
1. The liquid electrode device for coaxial electrospray printing is characterized by comprising a displacement table (1), a cantilever bracket (2), an electrode liquid storage cavity (4), a metal polar plate (3), a heating plate (5), a lead (6) and an electrode solvent (7);
the metal polar plate (3) is adhered to the bottom inside the electrode liquid storage cavity (4) through waterproof silicon rubber and is connected with the grounding end of a high-voltage power supply; the heating sheet (5) is adhered to the outer bottom of the electrode liquid storage cavity (4) through heat-conducting silicon rubber, is connected with a high-precision temperature controller and is used for adjusting the temperature of the electrode solvent (7); the electrode liquid storage cavity (4) is arranged in an annular structure at the end part of the cantilever bracket (2) and is fixed on the cantilever bracket (2) through a boss at the upper edge of the electrode liquid storage cavity (4), and the fixing mode is convenient for taking out the electrode liquid storage cavity (4) to clean internal residues after printing is finished; the other end of the cantilever bracket (2) is fixed on the displacement table (1) through threaded connection, and meanwhile, the center of an electrode liquid storage cavity (4) in an annular structure at one end of the cantilever bracket (2) is ensured to be positioned right below the coaxial spray head, and the distance between the liquid electrode device and the coaxial spray head is adjusted by utilizing the up-and-down movement of the displacement table (1); the coaxial spray head is connected with a high-voltage power supply and forms an electric field with the liquid electrode; before printing, injecting a certain amount of electrode solvent (7) into the electrode liquid storage cavity (4), forming a thin electrode liquid film on the upper surface of the metal polar plate (3), wherein the electrode solvent (7) is mutually soluble with the coaxial jet flow outer layer high-viscosity wrapping material; in the printing process, the coaxial jet is firstly contacted with an electrode liquid film on the upper surface of the metal polar plate (3) before reaching the metal polar plate (3), the coaxial jet material is quickly dissolved and diffused, the problem of charge accumulation caused by material accumulation is avoided, the instability of the jet caused by Coulomb repulsion force is eliminated, and the stability of the printing process and the consistency of the printing structure are improved.
2. The liquid electrode device as claimed in claim 1, wherein the cantilever bracket (2) is made of plexiglass and is fixed to the displacement table (1) by a screw thread using a T-shaped structure at one end; the other end of the annular structure is used for fixing the electrode liquid storage cavity (4).
3. The liquid electrode device as claimed in claim 1 or 2, wherein the electrode reservoir (4) is a circular cavity made of polytetrafluoroethylene, and the polytetrafluoroethylene eliminates interference of the electrode reservoir on a printing electric field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134637.4A CN109094199B (en) | 2018-09-28 | 2018-09-28 | Liquid electrode device for coaxial electrospray printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134637.4A CN109094199B (en) | 2018-09-28 | 2018-09-28 | Liquid electrode device for coaxial electrospray printing |
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| Publication Number | Publication Date |
|---|---|
| CN109094199A CN109094199A (en) | 2018-12-28 |
| CN109094199B true CN109094199B (en) | 2020-01-17 |
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| CN201811134637.4A Active CN109094199B (en) | 2018-09-28 | 2018-09-28 | Liquid electrode device for coaxial electrospray printing |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19963491A1 (en) * | 1999-12-28 | 2001-07-05 | Alstom Power Schweiz Ag Baden | Process for producing high-quality insulation of electrical conductors or conductor bundles of rotating electrical machines by means of spray sintering |
| CN204430562U (en) * | 2015-01-19 | 2015-07-01 | 桂林电子科技大学 | A kind of laser-processing system of liquid film protection |
| CN105058786B (en) * | 2015-07-14 | 2017-05-24 | 大连理工大学 | Coaxial focusing electro stream printing method |
| CN106142843B (en) * | 2016-07-06 | 2017-08-22 | 大连理工大学 | A kind of coaxial electrical fluid dynamic printing head device |
| CN106653877B (en) * | 2016-12-14 | 2017-12-01 | 大连理工大学 | A kind of method of EFI print solar-energy photo-voltaic cell electrode |
| CN107053653B (en) * | 2017-03-30 | 2019-04-09 | 大连理工大学 | Based on the compound electrojet 3D printing device and method of electric field-thermal field |
| CN107601425B (en) * | 2017-08-10 | 2020-06-16 | 大连理工大学 | Printing manufacturing method of nano beam structure |
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- 2018-09-28 CN CN201811134637.4A patent/CN109094199B/en active Active
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