CN111410870A - Organic conductive polymer ink and anti-counterfeiting system based on screen printing and manufacturing method thereof - Google Patents
Organic conductive polymer ink and anti-counterfeiting system based on screen printing and manufacturing method thereof Download PDFInfo
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- CN111410870A CN111410870A CN202010094530.2A CN202010094530A CN111410870A CN 111410870 A CN111410870 A CN 111410870A CN 202010094530 A CN202010094530 A CN 202010094530A CN 111410870 A CN111410870 A CN 111410870A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/08—Machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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Abstract
The invention discloses an organic conductive polymer ink and an anti-counterfeiting system based on silk-screen printing and a manufacturing method thereof.A printing performance of a functional layer ink formula is adjusted by using materials such as an organic solvent and the like so as to meet the requirements of silk-screen printing; the anti-counterfeiting system comprises a mobile phone driving system and an anti-counterfeiting display system, the anti-counterfeiting information display driving without an external power supply is realized by printing an induction coil and a conducting circuit and connecting the induction coil and an NFC chip and a rectifier diode, the anti-counterfeiting information display module is driven by the mobile phone with an NFC function in a contact mode with the printed induction coil to realize color change display of the anti-counterfeiting information, and the anti-counterfeiting effect of a product and the anti-counterfeiting experience of a user are enhanced; the anti-counterfeiting system realizes the preparation of the induction coil, the circuit and the information display module by adopting a screen printing mode, so that the anti-counterfeiting information display system with high anti-counterfeiting difficulty is obtained.
Description
Technical Field
The invention belongs to the field of printing anti-counterfeiting, relates to a silk-screen printing anti-counterfeiting technology, and particularly relates to organic conductive polymer ink and an anti-counterfeiting system based on silk-screen printing and a manufacturing method thereof.
Background
The information anti-counterfeiting technology of the printed and packaged product not only can play a role in protecting commodities and maintaining the interests of enterprises and consumers, but also can promote and highlight the inherent value of the commodities through a specific anti-counterfeiting effect, and further guide and promote consumption. Therefore, more and more enterprises are beginning to pay attention to the anti-counterfeiting characteristics of product printing. With the continuous progress of new material technology and printing technology, the anti-counterfeiting of printed packages realized by a printing mode is gradually popularized, and generally, the characteristics of rainbow holography, color change, luminescence, physical magnetism and the like are formed through the characteristics of materials, so that the anti-counterfeiting effect is achieved.
Except this, the promotion of product anti-fake effect, the interactive demonstration of anti-fake effect also receives consumer's continuous favor, especially in the continuous upgrading of technologies such as present cell-phone end discernment, cell-phone end demonstration and test pseudo-fake, has not only promoted consumer and has experienced, also gives the anti-fake technology of printed packaging product simultaneously and gives higher technical content, has promoted the technological barrier that the product was imitated, has played better anti-fake effect. More and more products tend to use such more intelligent ways to enhance the anti-counterfeiting effect of printed packaged products.
Therefore, the anti-counterfeiting information display method realizes the patterned expression of the anti-counterfeiting information by using the characteristic effect of the material and the printing mode, realizes the display effect of specific information under the driving of a mobile phone, and is an advanced solution. Not only improves the anti-counterfeiting effect of the product, but also can improve the use experience of consumers and promote the sale.
Disclosure of Invention
The invention aims to provide an organic conductive polymer ink, an anti-counterfeiting system based on screen printing and a manufacturing method thereof, so as to enhance the anti-counterfeiting effect of a product and the false proof experience of a user.
In order to achieve the above object, the present invention adopts the following technical solutions.
An organic conductive polymer ink suitable for screen printing is a poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid water dispersion liquid with the mass fraction of water dispersion phase being 1.3 percent, and a mixed solution of methanol and polyvinyl alcohol;
wherein the volume ratio of the poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid water dispersion to the methanol is 1:1, and the mass fraction of the polyvinyl alcohol is 5-10%.
The anti-counterfeiting system based on the screen printing comprises a mobile phone driving system and an information display module;
the mobile phone driving system comprises an induction coil, a diode and a chip; the induction coil is made by adopting screen printing of conductive silver adhesive; the diode is a rectifier diode, and the chip is an NFC chip;
the information display module comprises a color-changing display functional layer and an ion conducting layer which are prepared on a flexible substrate, wherein the flexible substrate is a polyethylene terephthalate film, and the color-changing display functional layer is prepared by adopting screen printing of organic conducting polymer ink; the ion conducting layer is made by adopting the silk-screen printing of an aqueous solution of anhydrous lithium chloride and polyvinyl alcohol;
the induction coil used for generating induction current is connected with the chip in parallel, and the information display module is connected with the diode in series and then connected with the induction coil in parallel.
Furthermore, the number of turns of the induction coil is 3-7 turns, the line width is 0.2-0.6mm, the induction coil is circular, and the diameter of the outer ring is 3.6 cm.
Furthermore, the mass ratio of anhydrous lithium chloride, polyvinyl alcohol and water in the raw materials for preparing the ion conducting layer is 15% to 70%.
The preparation method of the anti-counterfeiting system based on the screen printing comprises the following steps:
step 1: designing a color-changing display functional layer and an ion conducting layer pattern of an induction coil, a circuit and an information display module, and manufacturing a silk screen plate;
step 2: carrying out ultrasonic cleaning on the flexible substrate;
and step 3: mixing the poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid water dispersion with methanol and polyvinyl alcohol to prepare organic conductive polymer ink;
and 4, step 4: printing induction coils on the flexible substrate by using the silk screen plate manufactured in the step 1 and using conductive silver adhesive as printing ink; printing a circuit by using conductive silver adhesive as printing ink; printing a color-changing display functional layer of the information display module by using the organic conductive polymer ink as printing ink;
and 5: drying the color-changing display functional layer of the induction coil, the circuit and the information display module in an oven;
step 6: treating the color-changing display functional layer dried in the step 5 by using acetic acid;
and 7: connecting the chip with the induction coil dried in the step;
and 8: connecting the color-changing display function layer of the information display module processed in the step 6 with a diode in series and connecting the color-changing display function layer with the chip in the step 7 in parallel;
and step 9: preparing an ion conducting layer solution using anhydrous lithium chloride, polyvinyl alcohol and water;
step 10: and (4) silk-screening the ion conducting layer solution prepared in the step (9) as printing ink onto the color-changing display functional layer processed in the step (6) to realize the preparation of the ion conducting layer, and finishing the assembly of the information display module.
Further, in the step 2, the flexible substrate is subjected to ultrasonic cleaning for 10 minutes by using a cleaning agent, deionized water, acetone and isopropanol respectively.
Further, in the step 6, acetic acid with the mass fraction of 70-90% is dripped and cast on the discoloration display functional layer dried in the step 5 at room temperature, the discoloration display functional layer is kept for 5 minutes and then washed with isopropanol for 10 times, and then the above treatment process is repeated once, and finally dried at 100 ℃ for 5 minutes.
Further, the induction coil in the step 1 adopts a 400-mesh nylon screen printing plate, the circuit, the color-changing display function layer of the information display module and the ion conduction layer of the information display module adopt a 120-mesh nylon screen printing plate, and the line width of the circuit is 1 mm.
Further, the oven drying temperature in the step 5 is 105 ℃, and the time is 20 minutes.
Further, in the step 7 and the step 8, after the connection of the color-changing display function layer, the diode and the chip of the information display module with the circuit is realized by using the conductive silver adhesive, annealing is carried out for 20 minutes at 120 ℃.
Compared with the prior art, the invention has the following beneficial technical effects:
the organic conductive polymer (poly 3, 4-ethylenedioxythiophene-polystyrene sulfonate) ink suitable for screen printing is a mixed solution of poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid water dispersion, methanol and polyvinyl alcohol, is used as a color change display functional layer of an information display module, realizes color change display of anti-counterfeiting information after being electrified, and provides a unique anti-counterfeiting effect.
The anti-counterfeiting system based on the silk-screen printing comprises a mobile phone driving system and an anti-counterfeiting display system to realize the patterned expression of the anti-counterfeiting information of a product, wherein in the mobile phone driving system, the driving of the anti-counterfeiting information display without an external power supply is realized through the printing of an induction coil and a conductive circuit and the connection with an NFC chip and a rectifier diode, an information display module of the anti-counterfeiting display system comprises a color-changing display functional layer prepared by adopting the silk-screen printing of organic conductive polymer ink and an ion conductive layer prepared by adopting the silk-screen printing of anhydrous lithium chloride and a polyvinyl alcohol aqueous solution, and under the condition of no power supply (no external independent power supply), the mobile phone with the NFC function is in contact with the printed induction coil to drive the information display module to realize the color-changing display of the anti-counterfeiting information, so that the anti-counterfeiting.
The invention discloses a manufacturing method of an anti-counterfeiting system based on screen printing, which realizes the preparation of an induction coil, a circuit and an information display module by adopting a screen printing mode and provides a reliable scheme for realizing high-level anti-counterfeiting and added value improvement of products such as flexible printing packages and the like. The preparation method is environment-friendly, low in cost and simple in process, and the anti-counterfeiting information display system with high anti-counterfeiting difficulty is obtained and can be used for printing and packaging products, so that the anti-counterfeiting of the products is realized, the products are protected, and the additional value of the products is increased. Finally, the mobile phone with the NFC function is contacted with the printed induction coil, so that the color-changing display of the anti-counterfeiting information is realized.
According to the printed anti-counterfeiting information display system, acetic acid with the mass fraction of 70-90% is dripped and cast to the dried color-changing display functional layer, and the acetic acid treatment enhances the information display effect of the color-changing display functional layer.
In the anti-counterfeiting information display process, the mobile phone with the NFC function is in contact with an induction coil printed in a mobile phone driving system to drive an information display module in the anti-counterfeiting display system, so that the color change display of the anti-counterfeiting information is realized, meanwhile, information such as webpage addresses and the like can be written in an NFC chip, the webpage information is displayed on a mobile phone screen, the anti-counterfeiting function is further enhanced, the multiple anti-counterfeiting and added value improvement is realized, and a reliable technical scheme can be provided for the application of information display and information storage on a printed intelligent packaging product in the future.
Drawings
FIG. 1 is a block diagram of an induction coil design;
FIG. 2(a) is a color changing display functional layer design;
FIG. 2(b) is a layout of an ion conducting layer;
FIG. 2(c) is a circuit layout;
FIG. 3 is a schematic structural diagram of a silk-screen printing-based anti-counterfeiting system;
FIG. 4 is a diagram of an example of a mobile phone-driven anti-counterfeit information display system;
FIG. 5 is a schematic diagram of the structure and the object diagram of the anti-counterfeit system
Wherein: 1. induction coil, 2. diode, 3. chip, 4. information display module.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention thereto.
The invention provides an information display module which is prepared by taking poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT: PSS) with a water dispersion phase as a raw material, preparing ink suitable for screen printing, processing the ink by acetic acid and using a screen printing mode. And meanwhile, the information display module is combined with an NFC chip, a diode and an induction coil manufactured by silk-screen printing to construct the mobile phone-driven anti-counterfeiting display system.
The organic conductive polymer ink is a mixed solution of poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid, methanol and polyvinyl alcohol, wherein the mass fraction of the water dispersed phase is 1.3%; wherein the volume ratio of the poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid water dispersion to the methanol is 1:1, the mass fraction of the polyvinyl alcohol is 5-10%, and the specific dosage is based on meeting the screen printing requirement.
As shown in fig. 3, the anti-counterfeiting system based on screen printing comprises a mobile phone driving system and an information display module 4; the mobile phone driving system comprises an induction coil 1, a diode 2 and a chip 3. The induction coil 1 is made by adopting screen printing of conductive silver adhesive; the diode 2 is a rectifier diode, and the chip 3 is an NFC chip; the information display module 4 comprises a color-changing display functional layer and an ion conducting layer which are prepared on a flexible substrate, wherein the flexible substrate is a polyethylene terephthalate film, and the color-changing display functional layer is prepared by adopting screen printing of organic conducting polymer ink; the ion conducting layer is made by adopting the silk-screen printing of an aqueous solution of anhydrous lithium chloride and polyvinyl alcohol; the induction coil 1 for generating induction current is connected with the information display module 4 and the chip 3 in parallel, and the diode 2 for rectifying is connected between the induction coil 1 and the information display module 4 and the chip 3.
The material of the induction coil 1 is conductive silver colloid, the diode 2 is a diode with a rectification function, such as US1M, M4, RS2M, RS1M, M7, ES1M and the like, the chip 3 is an NFC chip with a certain information storage function, such as an NFC chip with the model of NFCNTAG213, the material of the color change display functional layer is a mixed solution of water-dispersed phase poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT: PSS), methanol (Me) and polyvinyl alcohol (PVA), the flexible substrate is a cleaned polyethylene terephthalate (PET) film, and the material of the ion conductive layer is an aqueous solution of anhydrous lithium chloride (L iCl) and polyvinyl alcohol (PVA).
With reference to fig. 1, fig. 2(a), fig. 2(b), fig. 2(c), and fig. 3, the method for manufacturing the anti-counterfeiting system based on screen printing is specifically implemented according to the following steps:
designing an induction coil, a circuit, a color changing display functional layer of an information display module and an ion conducting layer of the information display module, selecting a proper screen, and manufacturing the screen, wherein the number of turns of the induction coil is set to be 3-7 turns, the line width is 0.2-0.6mm, the shape is circular, the diameter of an outer ring is 3.6cm, and specifically shown in figure 1, the line width is 1mm, the size of the color changing display functional layer is 4 × 2cm, the shape is shown in figure 2(a), figure 2(b) and figure 2(c), the induction coil adopts a 400-mesh nylon screen, the color changing display functional layer of the circuit and the information display module and the ion conducting layer of the information display module adopt a 120-mesh nylon screen, and the manufacturing of a printing plate is completed according to the printing plate pattern and the screen parameters.
Step 2: the cleaning degree of the substrate material influences the wetting degree of the conductive silver paste and the conductive polymer ink, and the substrate is clean and has a good wetting effect. The high-transparency and flexible polyethylene terephthalate (PET) is selected as a substrate material, and the flexible substrate is sequentially subjected to ultrasonic cleaning for 10 minutes at room temperature by respectively using a cleaning agent, deionized water, acetone and isopropanol, so that the substrate is ensured to be clean.
And step 3: in order to ensure that the conductive polymer ink can be well wetted on a flexible substrate, a poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT: PSS) water dispersion and methanol (Me) are mixed according to the volume ratio of 1:1, and then polyvinyl alcohol (PVA) with the mass fraction of 5-7% is added to make the conductive polymer ink meet the screen printing requirement. Mixing the three materials, stirring for 10 hours at room temperature, and finishing the preparation of the color-changing display functional layer ink.
And 4, step 4: using a 400-mesh nylon silk screen plate to perform silk screen printing on the induction coil on the flexible substrate cleaned in the step 2 by using conductive silver adhesive as printing ink; performing circuit printing on a clean flexible substrate by using a 120-mesh silk screen plate and conductive silver adhesive as printing ink; and printing a color-changing display functional layer of the information display module on a clean flexible substrate by using a 120-mesh silk screen plate and using conductive polymer ink as ink.
And 5: and (3) placing the printed induction coil, the printed circuit and the color-changing display functional layer of the information display module in a drying oven at 105 ℃, and drying for 20 minutes to fully dry the induction coil, the printed circuit and the color-changing display functional layer.
Step 6: acetic acid is used for processing, and the mass fraction of the acetic acid is 70-90%. And (3) dripping acetic acid with a certain mass fraction in the range onto the color-changing display functional layer prepared in the step (5), keeping the temperature for 5 minutes at room temperature, washing the color-changing display functional layer for 10 times by using isopropanol, repeating the treatment process once, and finally drying the color-changing display functional layer on a hot bench at 100 ℃ for 5 minutes to finish post-treatment.
And 7: the chip and the induction coil dried in step 5 were connected using conductive silver paste and annealed at 120 ℃ for 20 minutes.
And 8: and (3) connecting the color-changing display functional layer of the information display module processed in the step (6) with a diode in series, connecting the color-changing display functional layer with the chip in the step (7) in parallel, and annealing at 120 ℃ for 20 minutes, as shown in fig. 3.
And 9, mixing 15 percent by mass of anhydrous lithium chloride (L iCl), 15 percent by mass of polyvinyl alcohol (PVA) and 70 percent by mass of water, and stirring the mixture at 80 ℃ for 10 minutes to finish the preparation of the ion conducting layer solution.
Step 10: and (4) silk-screening the ion conducting layer solution prepared in the step (9) onto the color-changing display functional layer obtained in the step (6) to realize the preparation of the ion conducting layer. The assembled information display module needs to be dried for 10 minutes on a hot table at 80 ℃, redundant moisture in the ion conduction layer is evaporated to dryness, and the construction of the organic conductive polymer ink, the anti-counterfeiting system based on the screen printing and the manufacturing method thereof are completed.
In the anti-counterfeiting information display process, the mobile phone with the NFC function is in contact with the induction coil of the printed mobile phone driving system to drive the anti-counterfeiting information in the anti-counterfeiting display system, so that the color changing display of the anti-counterfeiting information is realized, meanwhile, information such as webpage addresses and the like can be written in the NFC chip, the webpage information is displayed on a mobile phone screen, and the anti-counterfeiting performance of a product is further enhanced.
The physical effects of the organic conductive polymer ink and the anti-counterfeiting system based on the screen printing and the manufacturing method thereof are shown in fig. 4 and 5.
The invention is described in detail below with reference to examples:
example 1
An organic conductive polymer ink and an anti-counterfeiting system based on silk-screen printing and a manufacturing method thereof are specifically implemented according to the following steps:
(1) the number of turns of the induction coil is set to be 7, the line width is 0.6mm, the induction coil is circular, the diameter of an outer ring is 3.6cm, specifically shown in figure 1, the line width is 1mm, the size of the color-changing display functional layer is 4 × 2cm, the shape is shown in figure 2(a), figure 2(b) and figure 2(c), the induction coil adopts a 400-mesh nylon silk screen, the line, the color-changing display functional layer of the information display module and the ion conduction layer of the information display module adopt a 120-mesh nylon silk screen, and the production of the printing plate is completed according to the printing plate pattern and the silk screen parameters.
(2) The cleaning degree of the substrate material influences the wetting degree of the conductive silver paste and the conductive polymer ink, and the substrate is clean and has a good wetting effect. The high-transparency and flexible polyethylene terephthalate (PET) is selected as a substrate material, and the flexible substrate is sequentially subjected to ultrasonic cleaning for 10 minutes at room temperature by respectively using a cleaning agent, deionized water, acetone and isopropanol, so that the substrate is ensured to be clean.
(3) In order to ensure that the conductive polymer ink can be well wetted on a flexible substrate, a poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT: PSS) water dispersion and methanol (Me) are mixed according to the volume ratio of 1:1, and then polyvinyl alcohol (PVA) with the mass fraction of 7% is added to make the conductive polymer ink meet the screen printing requirement. Mixing the three materials, stirring for 10 hours at room temperature, and finishing the preparation of the color-changing display functional layer ink.
(4) Using a 400-mesh nylon silk screen plate to perform silk screen printing on the induction coil on the cleaned flexible substrate by using conductive silver adhesive as printing ink; performing circuit printing on a clean flexible substrate by using a 120-mesh silk screen plate and conductive silver adhesive as printing ink; printing a color-changing display functional layer of an information display module on a clean flexible substrate by using a 120-mesh silk screen plate and using conductive polymer ink as printing ink;
(5) and (3) placing the printed induction coil, the printed circuit and the color-changing display functional layer of the information display module in a drying oven at 105 ℃, and drying for 20 minutes to fully dry the induction coil, the printed circuit and the color-changing display functional layer.
(6) Acetic acid is used for processing, and the mass fraction of the acetic acid is 80%. And (3) dripping acetic acid onto the dried color change display functional layer, keeping the color change display functional layer for 5 minutes at room temperature, washing the color change display functional layer for 10 times by using isopropanol, repeating the treatment process once, and finally drying the color change display functional layer for 5 minutes on a heating table at 100 ℃ to finish post-treatment.
(7) And connecting the chip with the dried induction coil by using conductive silver adhesive.
(8) The color-changing display function layer of the information display module after the acetic acid treatment is connected in series with the diode and connected in parallel with the chip, as shown in fig. 3.
(9) The mass fraction ratio of anhydrous lithium chloride (L iCl), polyvinyl alcohol (PVA) and water is 15 percent to 70 percent, and the three are mixed and stirred for 10 minutes at 80 ℃ to complete the preparation of the raw material of the ion conduction layer.
(10) And (3) silk-screening the prepared raw material of the ion conduction layer onto the color-changing display functional layer treated by acetic acid to realize the preparation of the ion conduction layer. The assembled information display module was dried on a hot stand at 80 c for 10 minutes to evaporate excess moisture from the ion conductive layer.
The anti-counterfeiting system comprises organic conductive polymer ink, a silk-screen printing-based anti-counterfeiting system and a manufacturing method thereof, the structure is shown in fig. 3, when a mobile phone with an NFC function is opened and approaches an NFC induction area, anti-counterfeiting information is displayed in a color changing mode, meanwhile, a mobile phone screen can also pop up information (web pages) stored in NFC, and an effect graph is shown in fig. 4.
Example 2
An organic conductive polymer ink and an anti-counterfeiting system based on silk-screen printing and a manufacturing method thereof are specifically implemented according to the following steps:
(1) the number of turns of the induction coil is set to be 5 turns, the line width is 0.4mm, the induction coil is circular, the diameter of an outer ring is 3.6cm, specifically shown in figure 1, the line width is 1mm, the size of the color-changing display functional layer is 4 × 2cm, the shape is shown in figure 2(a), figure 2(b) and figure 2(c), the induction coil adopts a 400-mesh nylon silk screen, the line, the color-changing display functional layer of the information display module and the ion conduction layer of the information display module adopt a 120-mesh nylon silk screen, and the production of the printing plate is completed according to the printing plate pattern and the silk screen parameters.
(2) The cleaning degree of the substrate material influences the wetting degree of the conductive silver paste and the conductive polymer ink, and the substrate is clean and has a good wetting effect. The high-transparency and flexible polyethylene terephthalate (PET) is selected as a substrate material, and the flexible substrate is sequentially subjected to ultrasonic cleaning for 10 minutes at room temperature by respectively using a cleaning agent, deionized water, acetone and isopropanol, so that the substrate is ensured to be clean.
(3) In order to ensure that the conductive polymer ink can be well wetted on a flexible substrate, a poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT: PSS) water dispersion and methanol (Me) are mixed according to the volume ratio of 1:1, and then polyvinyl alcohol (PVA) with the mass fraction of 10% is added to make the conductive polymer ink meet the screen printing requirement. Mixing the three materials, stirring for 10 hours at room temperature, and finishing the preparation of the color-changing display functional layer ink.
(4) Using a 400-mesh nylon silk screen plate to perform silk screen printing on the induction coil on the cleaned flexible substrate by using conductive silver adhesive as printing ink; performing circuit printing on a clean flexible substrate by using a 120-mesh silk screen plate and conductive silver adhesive as printing ink; and printing a color-changing display functional layer of the information display module on a clean flexible substrate by using a 120-mesh silk screen plate and using conductive polymer ink as ink.
(5) And (3) placing the printed induction coil, the printed circuit and the color-changing display functional layer of the information display module in a drying oven at 105 ℃, and drying for 20 minutes to fully dry the induction coil, the printed circuit and the color-changing display functional layer.
(6) Acetic acid is used for processing, and the mass fraction of the acetic acid is 90%. And (3) dripping acetic acid onto the dried color change display functional layer, keeping the color change display functional layer for 5 minutes at room temperature, washing the color change display functional layer for 10 times by using isopropanol, repeating the treatment process once, and finally drying the color change display functional layer for 5 minutes on a heating table at 100 ℃ to finish post-treatment.
(7) And connecting the chip with the dried induction coil by using conductive silver adhesive.
(8) The color-changing display function layer of the information display module after the acetic acid treatment is connected in series with the diode and connected in parallel with the chip, as shown in fig. 3.
(9) The mass fraction ratio of anhydrous lithium chloride (L iCl), polyvinyl alcohol (PVA) and water is 15 percent to 70 percent, and the three are mixed and stirred for 10 minutes at 80 ℃ to complete the preparation of the raw material of the ion conduction layer.
(10) And (3) silk-screening the prepared raw material of the ion conduction layer onto the color-changing display functional layer treated by acetic acid to realize the preparation of the ion conduction layer. The assembled information display module needs to be dried for 10 minutes on a hot table at 80 ℃, redundant moisture in the ion conduction layer is evaporated to dryness, and the construction of the organic conductive polymer ink, the anti-counterfeiting system based on the screen printing and the manufacturing method thereof are completed.
Example 3
An organic conductive polymer ink and an anti-counterfeiting system based on silk-screen printing and a manufacturing method thereof are specifically implemented according to the following steps:
(1) the number of turns of the induction coil is set to be 3 turns, the line width is 0.2mm, the induction coil is circular, the diameter of an outer ring is 3.6cm, and specifically shown in a figure 2(a), a figure 2(b) and a figure 2(c), the line width is 1mm, the size of the color-changing display functional layer is 4 × 2cm, and the shape is shown in a figure 2.
(2) The cleaning degree of the substrate material influences the wetting degree of the conductive silver paste and the conductive polymer ink, and the substrate is clean and has a good wetting effect. The high-transparency and flexible polyethylene terephthalate (PET) is selected as a substrate material, and the flexible substrate is sequentially subjected to ultrasonic cleaning for 10 minutes at room temperature by respectively using a cleaning agent, deionized water, acetone and isopropanol, so that the substrate is ensured to be clean.
(3) In order to ensure that the conductive polymer ink can be well wetted on a flexible substrate, a poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT: PSS) water dispersion and methanol (Me) are mixed according to the volume ratio of 1:1, and then polyvinyl alcohol (PVA) with the mass fraction of 5% is added to make the conductive polymer ink meet the screen printing requirement. Mixing the three materials, stirring for 10 hours at room temperature, and finishing the preparation of the color-changing display functional layer ink.
(4) Using a 400-mesh nylon silk screen plate to perform silk screen printing on the induction coil on the cleaned flexible substrate by using conductive silver adhesive as printing ink; performing circuit printing on a clean flexible substrate by using a 120-mesh silk screen plate and conductive silver adhesive as printing ink; and printing a color-changing display functional layer of the information display module on a clean flexible substrate by using a 120-mesh silk screen plate and using conductive polymer ink as ink.
(5) And (3) placing the printed induction coil, the printed circuit and the color-changing display functional layer of the information display module in a drying oven at 105 ℃, and drying for 20 minutes to fully dry the induction coil, the printed circuit and the color-changing display functional layer.
(6) Acetic acid is used for processing, and the mass fraction of the acetic acid is 70%. And (3) dripping acetic acid onto the dried color change display functional layer, keeping the color change display functional layer for 5 minutes at room temperature, washing the color change display functional layer for 10 times by using isopropanol, repeating the treatment process once, and finally drying the color change display functional layer for 5 minutes on a heating table at 100 ℃ to finish post-treatment.
(7) And connecting the chip with the dried induction coil by using conductive silver adhesive.
(8) The color-changing display function layer of the information display module after the acetic acid treatment is connected in series with the diode and connected in parallel with the chip, as shown in fig. 3.
(9) The mass fraction ratio of anhydrous lithium chloride (L iCl), polyvinyl alcohol (PVA) and water is 15 percent to 70 percent, and the three are mixed and stirred for 10 minutes at 80 ℃ to complete the preparation of the raw material of the ion conduction layer.
(10) And (3) silk-screening the prepared raw material of the ion conduction layer onto the color-changing display functional layer treated by acetic acid to realize the preparation of the ion conduction layer. The assembled information display module needs to be dried for 10 minutes on a hot table at 80 ℃, redundant moisture in the ion conduction layer is evaporated to dryness, and the construction of the organic conductive polymer ink, the anti-counterfeiting system based on the screen printing and the manufacturing method thereof are completed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. An organic conductive polymer ink suitable for screen printing, characterized by: the aqueous dispersion of poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid with the mass fraction of water dispersion phase being 1.3 percent and the mixed solution of methanol and polyvinyl alcohol;
wherein the volume ratio of the poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid water dispersion to the methanol is 1:1, and the mass fraction of the polyvinyl alcohol is 5-10%.
2. A screen printing-based anti-counterfeiting system prepared by using the organic conductive polymer ink according to claim 1, wherein: comprises a mobile phone driving system and an information display module (4);
the mobile phone driving system comprises an induction coil (1), a diode (2) and a chip (3); the induction coil (1) is made by adopting screen printing of conductive silver adhesive; the diode (2) is a rectifier diode, and the chip (3) is an NFC chip;
the information display module (4) comprises a color-changing display functional layer and an ion conducting layer which are prepared on a flexible substrate, wherein the flexible substrate is a polyethylene terephthalate film, and the color-changing display functional layer is prepared by adopting screen printing of organic conducting polymer ink; the ion conducting layer is made by adopting the silk-screen printing of an aqueous solution of anhydrous lithium chloride and polyvinyl alcohol;
the induction coil (1) used for generating induction current is connected with the chip (3) in parallel, and the information display module (4) is connected with the diode (2) in series and then connected with the induction coil (1) in parallel.
3. The screen-printing-based anti-counterfeiting system according to claim 2, wherein: the number of turns of the induction coil (1) is 3-7 turns, the line width is 0.2-0.6mm, the induction coil is circular, and the diameter of the outer ring is 3.6 cm.
4. The screen-printing-based anti-counterfeiting system according to claim 2, wherein: the mass ratio of anhydrous lithium chloride, polyvinyl alcohol and water in the raw materials for preparing the ion conducting layer is 15% to 70%.
5. A method for preparing a screen-printing based anti-counterfeiting system according to claims 2 to 4, characterized by comprising the steps of:
step 1: designing a color-changing display functional layer and an ion conducting layer pattern of an induction coil (1), a circuit and an information display module (4), and manufacturing a silk screen plate;
step 2: carrying out ultrasonic cleaning on the flexible substrate;
and step 3: mixing the poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid water dispersion with methanol and polyvinyl alcohol to prepare organic conductive polymer ink;
and 4, step 4: printing the induction coil (1) on the flexible substrate by using the silk screen plate manufactured in the step (1) and using conductive silver adhesive as printing ink; printing a circuit by using conductive silver adhesive as printing ink; printing a color-changing display functional layer of the information display module (4) by using organic conductive polymer ink as printing ink;
and 5: drying the color-changing display functional layer of the induction coil (1), the circuit and the information display module (4) in an oven;
step 6: treating the color-changing display functional layer dried in the step 5 by using acetic acid;
and 7: connecting the chip (3) with the induction coil dried in the step 5;
and 8: connecting the color-changing display functional layer of the information display module (4) processed in the step (6) with the diode (2) in series, and then connecting the color-changing display functional layer with the chip (3) in the step (7) in parallel;
and step 9: preparing an ion conducting layer solution using anhydrous lithium chloride, polyvinyl alcohol and water;
step 10: and (4) silk-screening the ion conduction layer solution prepared in the step (9) as printing ink onto the color-changing display functional layer processed in the step (6) to prepare the ion conduction layer, and finishing the assembly of the information display module (4).
6. The method of claim 5, wherein the method comprises the steps of: and in the step 2, the flexible substrate is subjected to ultrasonic cleaning for 10 minutes by respectively using a cleaning agent, deionized water, acetone and isopropanol.
7. The method of claim 5, wherein the method comprises the steps of: and in the step 6, 70-90% by mass of acetic acid is dropwise cast onto the color change display functional layer dried in the step 5 at room temperature, the color change display functional layer is kept for 5 minutes and then washed with isopropanol for 10 times, the treatment process is repeated once, and finally the color change display functional layer is dried at 100 ℃ for 5 minutes.
8. The method of claim 5, wherein the method comprises the steps of: in the step 1, the induction coil (1) adopts a 400-mesh nylon silk screen printing plate, the lines, the color-changing display functional layer of the information display module (4) and the ion conduction layer of the information display module (4) adopt a 120-mesh nylon silk screen printing plate, and the line width of the lines is 1 mm.
9. The method of claim 5, wherein the method comprises the steps of: the drying temperature of the oven in the step 5 is 105 ℃, and the drying time is 20 minutes.
10. The method of claim 5, wherein the method comprises the steps of: and 7, in the step 8, the connection of the color-changing display function layer of the information display module (4), the diode (2) and the chip (3) with the circuit is realized by using conductive silver adhesive, and then annealing is carried out for 20 minutes at 120 ℃.
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