KR101831983B1 - Paper for Printing Electrode Pattern and Method for Printing the Same - Google Patents
Paper for Printing Electrode Pattern and Method for Printing the Same Download PDFInfo
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- KR101831983B1 KR101831983B1 KR1020150068900A KR20150068900A KR101831983B1 KR 101831983 B1 KR101831983 B1 KR 101831983B1 KR 1020150068900 A KR1020150068900 A KR 1020150068900A KR 20150068900 A KR20150068900 A KR 20150068900A KR 101831983 B1 KR101831983 B1 KR 101831983B1
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- paper
- ink
- printing
- electrode pattern
- silver
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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
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
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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
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5263—Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5263—Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B41M5/5272—Polyesters; Polycarbonates
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
- D21H5/20—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of organic non-cellulosic fibres too short for spinning, with or without cellulose fibres
Abstract
The present invention relates to a paper for electrode pattern printing, and provides an electrode pattern printing paper, a method of producing the electrode pattern printing paper, and a method of printing an electrode pattern using the electrode pattern printing paper. According to the present invention, the paper of the present invention can easily print an electrode pattern using a general household inkjet printer.
Description
The present invention relates to a paper for electrode pattern printing and a printing method thereof.
Currently, conductive materials are being actively developed from the semiconductor and electronics industries to the bio-industry. Conductive paste such as gold, silver and copper are sold in the market. In addition, these conductive materials are synthesized and improved, and they are being produced and developed in various industries, and researches are actively underway. In particular, silver is cheaper than gold and has higher conductivity, and its application is widespread. However, silver is widely used in the industry, but the use of silver in households used by ordinary people is limited due to the nature of metal particles. In addition, silver inks used in household inkjet printers are extremely limited. Even if it is used, the paper to be printed is a polymer film such as a PET film, and the conventional paper has a drawback that the conductivity is low. Therefore, it is possible to obtain high conductivity by printing the ink after coating the PCL fiber with the electrospinning method as well as the ordinary paper and the photo paper. Therefore, it is possible to easily draw the pattern desired by the user on paper, and to print silver in ordinary households. Furthermore, it can be used in paper electronics and biosensors.
In this connection, Korean Patent No. 10-1360404, US 2009/0233237 A1, Julia Fritsch et al., A new molecular silver precursor for the preparation of thin conductive silver films (Journl of Physics and Chemistry of Solids 74 1546-1552) and S. Brett Walker et al., Reactive Silver Inks for Patterning High-Conductivity Features at Mild Temperatures (JACS 134 (2012) 1419-1421).
Electrospinning is a method of fabricating continuous-phase fibers having a diameter of the order of 탆-nm scale using an electric field. The electrospinning is carried out by a known method such as self assembly, phase separation and template synthesis. In addition to being simpler than the methods, there is no restriction on the choice of materials, and there is a lot of interest in biomedical / industrial applications based on the various properties due to the high specific surface area due to the shape, porosity and ease of structure / size control. It is getting.
Inkjet printers are a technology that ejects ink droplets in fine droplets with a pulse voltage signal. Based on the theory of spraying droplets of liquid by Lord Rayleigh's jet jet in 1878, Elmqvist in the United States first developed inkjet printing In the 1970s, IBM applied continuous inkjet (CIJ), Canon's bubble inkjet (BIJ), Hewlett-Packard thermal inkjet (TIJ) And a drop-on-demand (DOD) type inkjet printer which is digitized by a pezoelectric inkjet (PIJ) of Epson in a unit of a minimum pico liter size droplet. The disadvantage of inkjet printing is that it has a low resolution and has developed steadily. In the case of Fuji Dimatix (model: DMP-2831) for industrial inkjet printers, 10 pL of ink is jetted by electrostatic metal- So that printing can be performed with a line width. However, these technologies and equipment are all factory, industrial and research, and it is presently impossible for ordinary individuals to easily access these technologies and equipment.
In the domestic market, multifunctional apparatuses such as Hewlett Packard, Samsung, Kenon and Epson are in widespread use in combination with office or personal inkjet printers, printers and scanners. Most printers are inexpensive, but the price of consumable inks is high. Since 2008, many small and medium-sized companies have developed refill cartridges and inks to lead the remanufacturing industry in the domestic market, . It is important to note that for most inkjet printers, the consumer market environment is well developed in which ink cartridges and refill cartridges can easily be purchased and installed in printers.
As described above, although the inkjet nozzle and its printing output device as a jetting device are well-funded, the development of a conductive ink to replace the color dye ink is inadequate. Therefore, it is required to develop a technical method and material for easily designing and manufacturing an electronic circuit board by freely printing personal conductive ink by using the supplied equipment as it is in the situation where a general personal inkjet printer is spread on the bottom side. Most of the conductive inks currently developed are colloidal solutions of metal-based nanoparticles, which are highly viscous and can be used only for the above-mentioned industrial Fuji Dimatix. In addition, a heat treatment (sintering) process for obtaining a metal crystal after printing is indispensable. Nanoparticles are characterized by relative sintering at a temperature of about 160 to 300 degrees Celsius, which is significantly lower than the melting point of metals up to several thousand degrees C. However, this process is not easily handled by households or the general public. In addition, most commercial metal nanoparticles have a disadvantage in that they are difficult to use because they are highly toxic acids or organic solvents. Also, metallic based conductive inks are oxidized and it is not easy to reduce them.
In summary, a patterned complex circuit line designed on a printing electrode or a computer using an insulating medium such as a paper, an OHP film, and a conductive ink-exclusive film as a substrate, The basic environment that can be obtained by printing is well equipped. In addition, high-tech materials such as conductive ink, reductant ink, and polymer insulation ink, which enhance the adsorption of conductive ink, are developed in such a way as to be readily available.
Numerous papers and patent documents are referenced and cited throughout this specification. The disclosures of the cited papers and patent documents are incorporated herein by reference in their entirety to better understand the state of the art to which the present invention pertains and the content of the present invention.
The present inventors have sought to develop a paper and a printing method thereof capable of printing an electronic pattern using a household inkjet printer. As a result, it has been confirmed that the electrode pattern can be easily printed using the household inkjet printer and the conductive ink when the polymer nanofiber-coated paper is used by electrospinning the polymer. Thereby completing the invention.
Accordingly, an object of the present invention is to provide a paper for electrode pattern printing.
Another object of the present invention is to provide a method of printing an electrode pattern using paper for electrode pattern printing.
It is still another object of the present invention to provide a method of printing an electrode pattern.
Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, claims and drawings.
According to an aspect of the present invention, there is provided an electrode pattern printing paper coated with a polymer nanofiber.
The present inventors have sought to develop a paper capable of printing an electronic pattern using a household inkjet printer. As a result, it was confirmed that the electrode pattern can be easily printed using a household inkjet printer and silver ink when a polymer-coated paper is used to electrospinning the polymer with the polymer nanofibers.
The main structure of the present invention is to coat a polymer on paper for electrode pattern printing.
According to an embodiment of the present invention, the polymer may be a polyester-based compound, polymethyl methacrylate, a polyamide-based compound, a polyolefin-based compound, a polyimide- A polymer selected from the group consisting of poly (vinyl alcohol), cellulose, acrylonitrile butadiene styrene, polyethersulfone, and polyethylenevinylacetate to be.
The polyester-based compound may be at least one selected from the group consisting of polycaprolactone, polylactic acid, polyhydroxybutyrate, polyhydroxyalkanoate, polyglycolide, Polybutylene succinate, poly (3-hydroxybutyrate-co-3-hydroxyvalerate), poly (3-hydroxybutyrate) Wherein the polyamide based compound is at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate or vactran, Is polycaprolactam or polyphthalamide, and the polyolefin-based compound is polyethyleneglycol but are not limited to, polyethylene, polypropylene, polymethylpentene, or polybutene.
According to another embodiment of the present invention, the polymer is a polyester compound or polymethylmethacrylate. According to a specific embodiment of the present invention, the polymer is polycaprolactone, polylactic acid or polymethylmethacrylate .
In the electrospinning of the present invention, in the case of a polymer solution having a low molecular weight, the radius of the electrically charged jet (the shape of the funnel which balances the electric field with the surface tension of the droplets of the polymer solution) according to the flow rate of the solution is small Loses. In other words, as the flow velocity decreases, the radius of the jet rapidly decreases, while when the flow velocity increases, the velocity of the jet decreases. Therefore, in the present invention, the decline rate of the jet radius is slowed by using the high molecular weight polycaprolactone.
In one embodiment of the present invention, the polymer has a molecular weight of 10,000 to 1,000,000.
In another embodiment of the present invention, the polymer has a molecular weight of 10000-500000, 20000-500000 or 50000-500000.
As the solvent for dissolving the polymer, a polar solvent or a non-polar solvent may be used. Suitable polar solvents are (i) water, (ii) alcohols such as methanol, ethanol, propanol, butanol, n-propanol, iso-propanol, n-butanol, 1-pentanol, 2-butoxyethanol or ethylene Glycol, HFIP (1,1,1,3,3,3-hexafluoro-2-propanol), (iii) acetic acid, (iv) dimethylformamide (DMFO) and (v) dimethyl sulfoxide Suitable nonpolar solvents include acetone, acetonitrile, ethyl acetate, methyl acetate, fluoroalkane, pentane, hexane, 2,2,4-trimethylpentane, decane, cyclohexane, cyclopentane, diisobutylene, 1 Chlorobutane, o -xylene, diisopropyl ether, 2-chloropropane, toluene, 1-chloropropane, chlorobenzene, benzene, diethyl ether, diethylsulfide, chloroform, Dichloromethane, 1,2-dichloroethane, aniline, diethylamine, ether, carbon tetrachloride, and THF.
In one embodiment of the present invention, the solvent is a polar solvent, and according to another embodiment of the present invention, the solvent is HFIP.
The coating of the polyester compound of the present invention is carried out by electrospinning, spin coating or direct printing.
According to one embodiment of the present invention, electrospinning is performed to coat the polymer on paper. The electrospinning is a method of implementing a continuous-phase fiber having a diameter of 탆-nm scale using an electric field. Electrospinning injects the polymer solution through the nozzle by controlling the flow rate of the polymer solution through the injection (or pump) at a constant rate. In this case, one electrode connects the power supply unit and the syringe needle to inject charges into the discharged polymer solution, and charges the opposite electrode (or the ground electrode) to the collector. When a high voltage is applied to the syringe needle, a mutual electrostatic force repulsive force between surface charges is generated. And (b) the Coulombic force applied to the external electric field causes the liquid polymer droplets to be thinned into a conical funnel shape. That is, when an electric field of a specific intensity is applied to a needle of a syringe in contact with a polymer solution, one charge of + or - is accumulated in the polymer solution, and the mutual repulsive force of the same charge exceeds the surface tension of the polymer solution, The hemispherical phase is spin-drawn into a funnel shape, in which the fibers are collected in the direction of the current collector, which is charged or grounded by the opposite charge.
In another embodiment of the present invention, the electrospinning is carried out under conditions of a polymer concentration of 1-10% by weight, a flow rate of 0.1-10 ml / h and a humidity of 5-30%.
In another embodiment of the present invention, the electrospinning is conducted at a concentration of 2-10 wt% polymer, a concentration of 4-10 wt% polymer, or a concentration of 4-8 wt% polymer.
In the electrode pattern printing paper of the present invention, the polymer nanofibers are coated, and the diameter of the nanofibers is a crucial parameter of the viscosity of the polymer. If the concentration of the solution in which the polymer is dissolved is higher, a thicker fiber can be obtained. In general, the fiber diameter is inversely proportional to the square of the concentration of the polymer solution.
In another embodiment of the present invention, the electrospinning is carried out at a flow rate of 0.5-10 ml / h, a flow rate of 0.5-5 ml / h or a flow rate of 0.5-2 ml / h.
In the electrode pattern printing paper of the present invention, the radius of the surface of the paper and the jet rapidly decreases, and as the flow velocity increases, the rate of decrease of the radius decreases.
In another embodiment of the invention, the electrospinning is carried out under conditions of 5-25% humidity, 7-20% humidity or 9-15% humidity.
The electrode pattern printing paper of the present invention can print an electrode pattern using a conductive ink.
The term " conductive ink " in the context of the present invention encompasses conductive materials such as silver and carbon in the form of powder or grains and can be printed or printed on various solid substrates such as paper or film, ≪ / RTI > Conductive inks include, for example, metal inks such as gold, silver, copper, nickel, gold, platinum, copper and palladium, ceramic inks such as metal oxides and carbon (or carbon nanotubes) Polymeric materials), but are not limited thereto.
Representative examples of the conductive ink include metal nanoparticles such as silver, copper, aluminum, and zinc, and carbon nanotubes, carbon black, graphite, graphene, diamond, Carbon isotopes such as fullerene can be used. The metal nano-particle-based conductive ink is preferably selected to have a post-printing heat treatment temperature within 200 deg. C, which does not significantly deform the paper substrate.
According to an embodiment of the present invention, the conductive ink is a metal precursor ink.
According to another embodiment of the present invention, the metal precursor ink is a silver precursor ink.
According to another aspect of the present invention, there is provided a method of printing an electrode pattern using an electrode pattern printing paper comprising the steps of:
(a) preparing a metal precursor ink by dissolving a metal precursor;
(b) dissolving a reducing agent to prepare a reducing ink;
(c) filling the inkjet cartridge of the inkjet printer with an ink selected from the group consisting of the metal precursor ink and the reducing ink of steps (a) and (b); And
(d) printing an electrode pattern on the electrode pattern printing paper using the inkjet printer of step (c).
Since the electrode pattern printing method using the electrode pattern printing paper of the present invention uses the electrode pattern printing paper, the description common to both of them is omitted in order to avoid the excessive complexity of the present specification.
In order to print an electrode pattern using the electrode pattern printing paper of the present invention, a metal precursor ink is prepared by dissolving a metal precursor.
The metal may be metal nanoparticles such as a silver precursor, a gold precursor, a copper precursor, an aluminum precursor and a zinc precursor, and is a metal forming particles by reduction.
According to an embodiment of the present invention, the metal precursor is a silver precursor.
As used herein, the term " precursor ink " refers to an ink consisting of a silver precursor in which an electron donor is coordinated to a silver salt.
One of the conductive inks, nanoparticle-based ink (nanoparticle ink), has problems such as poor storage stability over the long term or clogging of nozzles due to agglomeration or precipitation between particles when printing, A polymer material is used as a stabilizer in order to increase the viscosity, the surface tension, the sintering temperature and the conductivity increase. The precursor ink can solve this problem (see WO2014098396).
According to an embodiment of the present invention, the silver precursor may be silver trifluoroacetate, silver tetrafluoroborate, silver trifluoromethanesulfonate, silver perchlorate, perchlorate, silver nitrate, silver acetate, silver hexafluorophosphate, and mixtures thereof. The silver precursor is preferably selected from the group consisting of silver nitrate, perchlorate, silver nitrate, silver acetate, silver hexafluorophosphate and mixtures thereof.
According to another embodiment of the present invention, the silver precursor ink is trifluoroacetic acid silver.
Next, a reducing agent is dissolved to prepare a reducing ink.
As used herein, the term " reducing ink " reduces the silver precursor with an ink in which a reducing agent is dissolved.
According to an embodiment of the present invention, the reducing agent is selected from the group consisting of hydrazine, hydrazene hydrate, lithium aluminum hydride (LiAlH 4 ), sodium amalgam, sodium borohydride NaBH 4 ), sulfite, oxalic acid (C 2 H 2 O 4 ), formic acid (HCOOH), ascorbic acid (C 6 H 8 O 6 ), phosphates, (phosphorous acid) or DTT (Dithiothreitol). The chemical reduction by the reducing ink of the present invention eliminates the need for high temperature treatment required for thermal reduction.
According to another embodiment of the present invention, the reducing agent is hydrazine hydrate.
Next, silver precursor ink and a reducing ink are filled in a household inkjet cartridge.
According to one embodiment of the present invention, each ink is filled in an ink cartridge of an independent printer.
The main feature of the present invention is that it can be used in a general household ink jet printer.
Finally, a silver precursor ink and a reducing ink are printed on an electrode pattern printing paper using an inkjet printer.
According to one embodiment of the present invention, the printing is performed 1 to 10 times each of the silver precursor ink and the reducing ink.
According to another embodiment of the present invention, the electrode pattern printing paper is printed once to ten times with the silver precursor ink, and then once to ten times with the reducing ink.
As the number of times of printing the silver precursor ink and the reducing ink on the electrode pattern printing paper of the present invention increases, the sheet resistance decreases and the conductivity increases.
The features and advantages of the present invention are summarized as follows:
(a) The present invention provides a method of printing an electrode pattern using an electrode pattern printing paper and the electrode pattern printing paper.
(b) The paper of the present invention can easily print an electrode pattern using a general household inkjet printer.
Figure 1 shows a cell electrospinning equipment.
Figures 2a to 2c show polycaprolactone (PCL) coated paper, polymethylmethacrylate coated paper, and polylactic acid coated paper.
Figs. 3A and 3B are photographs of filling the precursor ink and the reducing ink cartridge, respectively.
Figures 4a and 4b show a paper printed with a silver precursor ink (a) followed by printing with a reducing agent ink (b).
FIGS. 5A and 5B show images printed on a paper coated with polylactic acid nanofibers and a paper coated with polymethylmethacrylate nanofibers, respectively, with a silver precursor ink and a reducing agent ink.
6A to 6C show SEM (Scanning Electron Microscope) images of the surface of paper treated with untreated paper, PCL coated paper, and silver precursor ink and reducing ink, respectively.
Figures 7a and 7b show SEM images of paper printed with silver precursor ink and reducing ink respectively on untreated paper and silver precursor ink and reductant ink on PCL coated paper.
8 shows various types of paper on which electrode patterns are printed according to the method of the present invention.
9A to 9C are graphs showing the results of measuring the conductivity after printing the silver precursor ink and the reducing agent ink on the sheet resistance, polylactic acid and polymethyl methacrylate-coated paper according to the number of times of printing the silver precursor ink and the reducing agent ink on the PCL coated paper, respectively Show.
10 shows light emission of a light bulb using paper on which an electrode pattern is printed according to the method of the present invention.
11 shows the heating effect of the electrode pattern printed on the PCL coated paper.
Fig. 12 shows an example of various overlapping printing for printing an electrode pattern.
Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments in accordance with the gist of the present invention .
Example
Example 1: Preparation of paper
Experimental material
Polycaprolactone (PCL; Mn: 80,000) and polymethylmethacrylate (PMMA; Mw: 350,000) were purchased from Sigma Aldrich (St. Louis, Mo.). Polylactic acid (bulk PLA) was purchased from filabo.com. HFIP (1,1,1,3,3,3-Hexafluoro-2-propanol) was purchased from Tokyo Chemical Industry CO., LTD.
Experimental methods and results
To prepare the electrode pattern printing paper of the present invention, electrospinning was carried out.
Since the humidity and temperature are very important in the electrospinning process, experiments were conducted in a transparent box with adjustable humidity and temperature (FIG. 1). The reaction humidity was about 12%, which was less than 20%. The reaction temperature was maintained at room temperature (28 ° C).
Polycaprolactone (PCL, Mw: 80000) was dissolved in HFIP (1,1,1,3,3,3-hexafluoro-2-propanol) in an amount of 6% by weight (Biomaterials 35 ) 3188-3197). Polylactic acid (PLA) was dissolved in the HFIP at 6 wt%. Polymethlmethacrylate (PMMA, Mw: 350,000) was dissolved in the HFIP in an amount of 7% by weight. Each prepared polymer solution was filled into a 1 mL syringe and the syringe needle (23.5G) was assembled. The syringe filled with the polymer solution was placed on the syringe pump. At this time, the flow rate is 1 ml / h.
The Collector is an
A paper having randomly coated polymer nanofibers having a diameter of about 6.5 cm was obtained, for example, a paper coated with PCL nanofibers (Figs. 2A to 2C).
Example 2 Silver Ink Printing
Experimental material
Trifluoroacetic acid (Silver trifluoro acetate, 98%) and hydrazine monohydrate (98%) were purchased from Sigma Aldrich (St. Louis, Mo.). Ethanol is available from Jinchemical CO. LTD. Water was distilled water.
Experimental methods and results
Silver trifluoro acetate was dissolved in ethanol at 33 wt% to prepare a silver precursor ink. The prepared silver precursor ink was charged into an ink jet cartridge (Fig. 3A).
Hydrazine was mixed at 33 vol% in a mixed solution of ethanol and deionized water at a ratio of 5: 5 and filled in an inkjet cartridge (Fig. 3B).
Patterns were repeatedly printed with silver precursor inks and reducing agent inks (hydrazine inks) on paper coated with PCL nanofibers using an Absson T-10 inkjet printer, which is a home inkjet printer (FIGS. 4A and 4B).
Each of the polylactic acid-coated paper and the polymethylmethacrylate-coated paper also repeatedly printed the precursor ink and the reducing ink to reduce the silver precursor ink (FIGS. 5A and 5B). The surface of the paper printed with the untreated paper, the PCL coated paper, and the silver precursor ink and the reducing ink was observed with a scanning electron microscope (SEM), respectively, and it was confirmed that PCL fiber and silver crystals were formed on the paper (FIGS. 6c).
On the other hand, SEM was used to compare surfaces of silver (PC) nano-fiber-coated paper with plain paper (A4 paper) and silver precursor reduced surfaces (Figs. 7A and 7B). Even if silver and hydrazine are printed on plain paper, silver particles are not generated enough to produce conductivity. However, when silver and hydrazine are printed on paper coated with PCL nanofibers, sufficient silver particles are produced to provide good conductivity.
Such printing is possible not only for ordinary paper but also for various kinds of paper. Newspapers, magazines, and printing paper were coated with PCL, and silver precursor inks and reducing agent inks were printed (Fig. 8).
Example 3: Measurement of conductivity and surface
Experimental material
Conductivity was measured by connecting a 4-point probe instrument from LUCAS LAB to a Keithley 2400 instrument. The surface was measured with a Mini-SEM SNE4500M equipment manufactured by SEC.
Experimental methods and results
Conductivity was measured according to the number of printing of the precursor ink and hydrazine solution ink, and PCL-coated paper, polylactic acid-coated paper and polymethylmethacrylate-coated paper were printed four times with the precursor ink and four times with the hydrazine solution ink The sheet resistance is 2.4 Ω / sq. And 2.2 Ω / sq, respectively. And 2.8? / Sq. (Figs. 9A to 9C). After printing PCL nanofibers on various paper such as newspapers, magazines, print paper, etc., a precursor and a reducing agent were printed and a 3 V battery was connected to realize a pattern having high conductivity in which the LED bulb emits light (FIG. 10).
Further, heat generation through conduction of the paper was confirmed. When 3 V was applied at room temperature for 5 seconds, the temperature rose from 27 DEG C to 23 DEG C to 50 DEG C (Fig. 11). This effect suggests applicability of the paper of the present invention to a thin-film heat-generating resistor. The paper of the present invention can achieve optimum conductivity through various overprinting (Fig. 12).
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. It is therefore intended that the scope of the invention be defined by the claims appended hereto and their equivalents.
Claims (12)
(a) coating a polymeric nanofiber on the surface of a paper, wherein the polymer is polycaprolactone, polylactic acid or polymethylmethacrylate; And
(b) printing an electrode pattern by sequentially printing silver precursor ink and a reducing ink on a paper using an inkjet printer.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150068900A KR101831983B1 (en) | 2015-05-18 | 2015-05-18 | Paper for Printing Electrode Pattern and Method for Printing the Same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150068900A KR101831983B1 (en) | 2015-05-18 | 2015-05-18 | Paper for Printing Electrode Pattern and Method for Printing the Same |
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| KR20160135892A KR20160135892A (en) | 2016-11-29 |
| KR101831983B1 true KR101831983B1 (en) | 2018-02-26 |
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| WO2023287652A1 (en) * | 2021-07-15 | 2023-01-19 | Corning Incorporated | Multi-ink layered printed electrode for wrap around electrodes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006516818A (en) * | 2003-01-28 | 2006-07-06 | コンダクティブ・インクジェット・テクノロジー・リミテッド | Method for producing a conductive metal region on a substrate |
| US20070148365A1 (en) * | 2005-12-28 | 2007-06-28 | Knox David E | Process and apparatus for coating paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006516818A (en) * | 2003-01-28 | 2006-07-06 | コンダクティブ・インクジェット・テクノロジー・リミテッド | Method for producing a conductive metal region on a substrate |
| US20070148365A1 (en) * | 2005-12-28 | 2007-06-28 | Knox David E | Process and apparatus for coating paper |
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