CN102277036A - Screen printing nanometer silver conductive ink and preparation method thereof - Google Patents

Screen printing nanometer silver conductive ink and preparation method thereof Download PDF

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CN102277036A
CN102277036A CN2011102621474A CN201110262147A CN102277036A CN 102277036 A CN102277036 A CN 102277036A CN 2011102621474 A CN2011102621474 A CN 2011102621474A CN 201110262147 A CN201110262147 A CN 201110262147A CN 102277036 A CN102277036 A CN 102277036A
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conductive ink
screen printing
nano silver
quality
ink
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周雪琴
刘东志
李巍
莫黎昕
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Tianjin University
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Tianjin University
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Abstract

The invention discloses screen printing nanometer silver conductive ink and a preparation method thereof. The screen printing nanometer silver conductive ink comprises the following components in percentage by mass: 2 to 50 percent of silver granules with the grain diameter of less than nanometers, 2 to 30 percent of energetic additive, 40 to 90 percent of ink solvent, 0.1 to 5 percent of surface tension regulator, 0.1 to 10 percent of flatting agent, 0.05 to 20 percent of retarder, 0.05 to 10 percent of thixotropic agent and 0.01 to 0.1 percent of preservative, wherein an organic protective agent is wrapped on surfaces of the silver granules. The preparation method comprises the following steps of: preparing the nanometer silver granules of which the surfaces are coated with the organic protective agent from silver nitrate serving as a raw material; preparing nanometer silver solution in an ink solvent; and blending nanometer silver conductive ink by using the functional additive. In the screen printing nanometer silver conductive ink, the energetic additive with a decomposing exothermic effect is added into the nanometer silver solution, so that the screen printing nanometer silver conductive ink has the characteristics of low aftertreatment temperature and high adhesive force, and is particularly suitable to be printed on flexible base materials.

Description

Silk screen printing nano silver conductive ink and preparation method thereof
Technical field
The present invention relates to a kind of silk screen printing nano silver conductive ink and preparation method thereof, belong to the electronic printing material technology.
Background technology
At traditional electronics and microelectronic industry, the modes of photoengraving that adopt prepare conducting wire and electronic devices and components more, its complicated process of preparation, a large amount of chemical pollutions and wastage of material in preparation process, have been produced simultaneously, this and the current requirement of electron trade for production efficiency, and the environmental friendliness formula mode of production that society is advocated is inconsistent.By contrast, for example ink-jet of modern printing technology, offset printing, gravure, xeroprinting and silk screen printing etc. then are a kind of efficient, environmental protection, the mode of production cheaply.Electrically conductive ink especially the development of conductive ink make to adopt the mode of printing prepare various conducting wires and electronic devices and components become a kind of may, Here it is " printing electronics ", and comprising that aspects such as thin-film transistor circuit, indicating meter, interconnection line, photovoltaic cell, transmitter and clutch obtain to use.
The nano metal conductive ink is the general name that contains a class ink of the nano metal particles that can form the conducting wire on base material.Its raw material is easy to get, technology is simple, and formed circuit electroconductibility height, attracts tremendous attention now, is the emphasis and the direction of present conductive ink development.Nano metal particles proportion is bigger, and the specific surface energy height, is easy to coalescently, must adopt suitable mode to improve its dispersion stabilization in conductive ink.Protective material can interact with metal nanoparticle and be coated on its surface, thereby suppresses nucleation, the growth of particle, and stops the reunion and the sedimentation of particle, usually is used to improve the dispersion stabilization of nano-metal particle.Diffusant both can with the nano metal particles surface interaction, again can with the solvent phase mutual effect, help to reduce the interfacial energy of nano metal particles, therefore also can be used for improving the dispersion stabilization of nano-metal particle.But these protective materials and diffusant can influence electronics transmission between metal nanoparticle in printing coating simultaneously, therefore must have a last handling process for example thermal treatment promote particles sintering, improve the electroconductibility of coating.And higher post-processing temperature has limited the range of application of metal nanoparticle suspension.As everyone knows, current electronics and microelectronic industry increase day by day for the demand of flexible display device, and the support base material of flexible display device mostly is some transparent polymer films, as PET, PEN etc., the tolerable temperature of this family macromolecule film is lower than 200 ℃ more, and therefore how obtaining the good conductive coating of conductivity under lower post-processing temperature becomes one of emphasis of numerous investigators' concerns.On the other hand, because the composition of nano metal conductive coating is single relatively, the sticking power intensity of conductive coating and various base materials a little less than, easily in follow-up processing, transportation and in using, occur coming off or friction damage, be difficult to guarantee the stability of its conductivity.Therefore, how to reduce nano metal conductive coating post-processing temperature and to improve coating adhesion be two hang-ups that nano metal suspension conductive ink faces.
In order to reduce the coating post-processing temperature; investigators have inquired into the influence to microtexture and electroconductibility in the conductive coating heat treatment process of ink composition, nano metal particle diameter, post-treatment condition; attempt changing the protective material structure and weakening it and the interaction of nano metal particles; realize protective material taking off absorption and decomposing at a lower temperature, thereby reduce the conductive coating post-processing temperature.Kim etc. are at article Highly conductive ink jet printed films of nanosilver particles for printable electronics (Electrochemical and solid-state letters; 2005; 8 (11): having reported a kind of among the J30~J33) is protectant nano silver conductive ink with Polyvinylpyrolidone (PVP), and its thermal treatment temp is 200 ℃.Nguyen etc. are at article Nitrocellulose-stabilized sliver nanoparticles as low conversion temperature precursors useful for inkjet printed electronics (Journal of materials chemistry; 2007; 17:1725~1730) be that protective material has prepared a kind of nano silver conductive ink with the nitrocotton in, its thermal treatment temp is 190 ℃.Volkman etc. are at article Ink-jetted silver/copper conductors for printed RFID applications (Materials research society symposium proceedings; 2004,814:151~156) reported that a kind of alkyl sulfhydryl is that its thermal treatment temp of protectant nano silver conductive ink is 200 ℃.It is protectant nano silver conductive ink with alkylamine that Li etc. (Journal ofthe American chemical society, 2005,127:3266~3267) have reported a kind of, and its thermal treatment temp is 140 ℃.But, weaken protective material and nano-metal particle reactive force, often can influence the particle diameter of nano-metal particle again, reduce the dispersion stabilization of nano-metal particle simultaneously.In addition, small molecules protective materials such as alkyl sulfhydryl, alkylamine decompose in heat treatment process, so coatings prepared sticking power is very poor.
Improve conductive coating sticking power at present often by the raising sintering temperature, or under vacuum, carry out sintering, or add some macromolecular materials, or add some and realize at the material that last handling process can form macromolecular material.The method that increases coating adhesion under High Temperature High Pressure has proposed higher requirement for post-treatment condition, runs counter to the developing direction of conductive ink.Increase coating adhesion though add pluronic polymer, reduced its conductivity to a certain extent.
Summary of the invention
The object of the present invention is to provide a kind of silk screen printing nano silver conductive ink and preparation method thereof, this silk screen printing nano silver conductive ink, it is low to have a post-processing temperature, the characteristics of strong adhesion, its preparation process is simple.
The present invention is realized that by the following technical programs a kind of silk screen printing nano silver conductive ink is characterized in that, it is made up of following component and quality percentage composition:
The surface is coating the silver-colored particle of the particle diameter of organic protective agent less than 50nm: 2-50%;
Contain energy additive: 2-30%;
Ink solvent: 40%-90%;
Surface tension modifier: 0.1-5%;
Flow agent: 0.1-10%;
Retarding agent: 0.05-20%;
Thixotropic agent: 0.05-10%;
Sanitas: 0.01-0.1%;
And the quality percentage composition sum of above-mentioned each component is 100%.
Above-mentioned nano-Ag particles is covering organic protective agent, be selected from butyl sulfhydryl, pentan-thiol, hexylmercaptan, heptanthiol, spicy thioalcohol, decyl mercaptan, lauryl mercaptan, tridecyl mercaptan and tetradecyl mercaptan wherein one or both.
Above-mentioned containing can additive, is selected from N, N-dimethyl oxidation aniline, N, the N-dimethyl is to alkyl oxidation aniline, dodecyl dimethyl tertiary amine oxide, tetradecyl dimethyl oxidation tertiary amine, hexadecyldimethyl benzyl ammonium tertiary amine oxide, N-oxidation methyl morpholine and nitro-cotton wherein one or both.
Above-mentioned ink solvent, be selected from ethanol, Virahol, butanols, ethylene glycol, Skellysolve A, normal hexane, normal heptane, octane, positive nonane, n-dodecane, pentamethylene, hexanaphthene, methylcyclopentane, methylcyclohexane, sherwood oil, tetrahydrofuran (THF), benzene,toluene,xylene, tetracol phenixin, ethyl acetate and butylacetate wherein one or both.
Above-mentioned surface tension modifier be selected from commodity GSK511, commodity AK505 and commodity CFL7260 wherein a kind of.
Above-mentioned flow agent be selected from commodity HX-3060, commodity GSK-691 and commodity GSK-512 wherein a kind of.
Above-mentioned retarding agent be selected from ethylene glycol phenyl ether, isophorone, Terpineol 350, turps, glycerine, polyoxyethylene glycol and nylon acid methyl esters wherein one or both.
Above-mentioned thixotropic agent be selected from hydrogenated castor oil, Gum Rosin, dammar gum, soluble phenolic resin, petroleum resin and terpine resin wherein one or both.
Above-mentioned sanitas be selected from phenylformic acid, dehydroacetic acid (DHA), methyl p-hydroxybenzoate and ethyl p-hydroxybenzoate wherein one or both.
Above-mentioned silk screen printing nano silver conductive ink preparation method is characterized in that comprising following process:
1) surface is coating the preparation of the nano-Ag particles of organic protective agent:
The Silver Nitrate of 1 part of quality is dissolved in 120-160 part quality Virahol, stir and to add 1-3 part quality organic protective agent down, in system, add sodium borohydride with 1 part of quality after 5 minutes and be dissolved in solution in 150 parts of quality Virahols and the 30 parts of quality alcohol mixed solvents; Stirring at normal temperature reaction 15-30min adds 80-100 part deionized water more then, filters; Ultra-sonic dispersion is to water, ethanol, acetone successively for filter cake, and filtering and washing impurity obtains the nanometer silver of aterrimus particle diameter less than 50nm, dries standby naturally.
2) preparation of Nano silver solution:
Can be dissolved in the ink solvent of 2-40 part quality by additive containing of 1 part of quality, get solution A; Under the ultra-sonic dispersion condition, in solution A, slowly add the nanometer silver of 1-20 part quality step 1) system, and the maintenance temperature is lower than, and ultra-sonic dispersion 3h obtains Nano silver solution under 30 ℃ of conditions.
3) modulation of nano silver conductive ink:
Set by step 2) containing of 1 part of quality can the additive meter in the Nano silver solution of system, to step 2) surface tension modifier of addition 0.01-2.5 part quality successively in the Nano silver solution of system, 0.01-5 the flow agent of part quality, 0.002-10 the retarding agent of part quality and the thixotropic agent of 0.002-5 part quality, regulating its surface tension is 10~40mN/m, viscosity is 1000~100000cP, and satisfy of the requirement of silk screen printing ink for rate of drying and ink rheological property, the sanitas that in solution, adds 0.0005-0.05 part quality again, mix, obtain screen printed conductive ink water.
Compared with prior art, the present invention in Nano silver solution, added have decompose containing of exothermic effect can additive, energetic material decomposes the heat that discharges and is absorbed by nano-Ag particles, realized the hot amplification effect of nano-Ag particles coating, reduce the post-processing temperature of coating, can under low post-processing temperature, obtain the good metallic conduction coating of conductivity.The by product of energetic material thermal decomposition process remains in the coating simultaneously, has strengthened the sticking power intensity of conductive coating and matrix.Not only overcome the problem that existing conductive ink post-processing temperature is higher relatively and printed coating sticking power is lower, and simplified aftertreatment technology, the printing that is particularly suitable on the flexible parent metal is used.
Embodiment
Embodiment 1:
One, the surface is coating the preparation of organic protective agent nano-Ag particles
The Silver Nitrate of 0.5g is dissolved in the 80g Virahol, stirs and to add the 0.7g lauryl mercaptan down, in system, add sodium borohydride with 0.5g after 5 minutes and be dissolved in solution in 75g Virahol and the 15g alcohol mixed solvent; Stirring at normal temperature reaction 15min adds the 40mL deionized water more then, filters; Ultra-sonic dispersion is to water, ethanol, acetone successively for filter cake, and filtering and washing impurity obtains the aterrimus particle, dries naturally, is the nano-Ag particles that the surface is coating lauryl mercaptan, grain diameter 5nm.
Two, the preparation of Nano silver solution
With 1g N, N-dimethyl oxidation aniline is dissolved in 30ml toluene and 10ml ethanol mixed solvent, the 2g nano-Ag particles is joined in the above-mentioned mixing solutions under ultrasonic state, and keep temperature be 20 ℃ ultrasonic 3 hours, obtain Nano silver solution.
Three, the modulation of nano silver conductive ink
The surface tension that in the Nano silver solution that step 2 makes, adds 0.02g GSK511 (manufacturer: the Gauss of Shenzhen enters Industrial Co., Ltd.) regulator solution successively, add 0.05g GSK512 (manufacturer: the Gauss of Shenzhen enters Industrial Co., Ltd.) and regulate the levelling property of coating, add the 2.5g isophorone and regulate the rate of drying of coating, the viscosity and the thixotropy that add 0.5g hydrogenated castor oil and 2.5g Gum Rosin regulator solution, make that solution surface tension is 24.8mN/m, viscosity is 1006cP, and satisfies the requirement of silk screen printing ink for rate of drying and ink rheological property; The ethyl p-hydroxybenzoate that adds 0.001 gram in solution after mixing, obtains screen printed conductive ink water as sanitas again.
Embodiment 2:
One, the surface is coating the preparation of organic protective agent nano-Ag particles
With embodiment 1 step 1.
Two, the preparation of Nano silver solution
The 1g nitro-cotton is dissolved in 30ml toluene and 10ml tetrahydrofuran (THF) mixed solvent, the 2g nano-Ag particles is joined in the above-mentioned mixing solutions under ultrasonic state, and keep temperature be 20 ℃ ultrasonic 3 hours, obtain nano-Ag particles solution.
Three, the modulation of nano silver conductive ink
(manufacturer: Shanghai strength brightness chemical industry company limited) surface tension of regulator solution, adding 0.1g GSK691 (manufacturer: the Gauss of Shenzhen enters Industrial Co., Ltd.) regulate the levelling property of coating to add 0.02g CFL7260 in the Nano silver solution that step 2 makes successively, add 1.5g nylon acid methyl esters and regulate the rate of drying of coating, the viscosity and the thixotropy that add 3g Gum Rosin regulator solution, make that solution surface tension is 25.2mN/m, viscosity is 1016cP, and satisfies the requirement of silk screen printing ink for rate of drying and ink rheological property; The phenylformic acid that adds 0.001 gram in solution after mixing, obtains screen printed conductive ink water as sanitas again.
Embodiment 3:
One, the surface is coating the preparation of organic protective agent nano-Ag particles
The Silver Nitrate of 0.5g is dissolved in the 60g Virahol, stirs and to add the 1.5g n-amyl mercaptan down, in system, add sodium borohydride with 0.5g after 5 minutes and be dissolved in solution in 75g Virahol and the 15g alcohol mixed solvent; Stirring at normal temperature reaction 15min adds the 50mL deionized water more then, filters; Ultra-sonic dispersion is to water, ethanol, acetone successively for filter cake, and filtering and washing impurity obtains the aterrimus particle, dries naturally, is the nano-Ag particles that the surface is coating lauryl mercaptan, grain diameter 5nm.
Two, the preparation of Nano silver solution
With 2g N, N-dimethyl oxidation aniline is dissolved in 30ml toluene and 15ml ethanol mixed solvent, the 10g nano-Ag particles is joined in the above-mentioned mixing solutions under ultrasonic state, and keep temperature be 20 ℃ ultrasonic 3 hours, obtain nano-Ag particles solution.
Three, the modulation of nano silver conductive ink
In the Nano silver solution that step 2 makes, add 0.5g AK505 successively and (originate from the U.S., brand: Elementisv) surface tension of regulator solution, adding 2g HX-3060 (manufacturer: the levelling property of adjusting coating Guangzhou China auxiliary agent chemical industry company limited), add 3g turps and 1g glycerine and regulate the rate of drying of coating, the viscosity and the thixotropy that add 4g terpine resin regulator solution, make that solution surface tension is 24.5mN/m, viscosity is 1012cP, and satisfies the requirement of silk screen printing ink for rate of drying and ink rheological property; The methyl p-hydroxybenzoate that adds 0.002 gram in solution after mixing, obtains screen printed conductive ink water as sanitas again.
Comparing embodiment 1
One, the surface is coating the preparation of organic protective agent nano-Ag particles
With embodiment 1 step 1.
Two, the preparation of Nano silver solution
The 2g nano-Ag particles is joined under ultrasonic state in 30ml toluene and the 10ml ethanol mixed solvent, and keep temperature be 20 ℃ ultrasonic 3 hours, obtain nano-Ag particles solution.
Three, the modulation of nano silver conductive ink
The surface tension that in the Nano silver solution that step 2 makes, adds 0.02g GSK511 (manufacturer: the Gauss of Shenzhen enters Industrial Co., Ltd.) regulator solution successively, add 0.05g GSK512 (manufacturer: the Gauss of Shenzhen enters Industrial Co., Ltd.) and regulate the levelling property of coating, add the 2.5g isophorone and regulate the rate of drying of coating, the viscosity and the thixotropy that add 0.5g hydrogenated castor oil and 2.5g Gum Rosin regulator solution, make that solution surface tension is 24.6mN/m, viscosity is 1004cP, and satisfies the requirement of silk screen printing ink for rate of drying and ink rheological property; The ethyl p-hydroxybenzoate that adds 0.001g in solution after mixing, obtains screen printed conductive ink water as sanitas again.
Comparing embodiment 2
One, the surface is coating the preparation of organic protective agent nano-Ag particles
With embodiment 3 step 1.
Two, the preparation of Nano silver solution
The 10g nano-Ag particles is joined under ultrasonic state in 30ml toluene and the 15ml ethanol mixed solvent, and keep temperature be 20 ℃ ultrasonic 3 hours, obtain Nano silver solution.
Three, the modulation of nano silver conductive ink
In the Nano silver solution that step 2 makes, add 0.5g AK505 successively and (originate from the U.S., brand: Elementisv) surface tension of regulator solution, adding 2g HX-3060 (manufacturer: the levelling property of adjusting coating Guangzhou China auxiliary agent chemical industry company limited), add 3g turps and 1g glycerine and regulate the rate of drying of coating, the viscosity and the thixotropy that add 4g terpine resin regulator solution, make that solution surface tension is 26.8mN/m, viscosity is 1009cP, and satisfies the requirement of silk screen printing ink for rate of drying and ink rheological property; The methyl p-hydroxybenzoate that adds 0.002 gram in solution after mixing, obtains screen printed conductive ink water as sanitas again.
Embodiment and comparing embodiment explanation:
Table 1 is that the prepared screen printed conductive ink water of embodiment 1, embodiment 2 and comparing embodiment 1 is through surface resistivity and sticking power intensity (the ASTM D 3359Adhesion Test standard) performance data of pattern behind heat treatments at different 30min at spray ink Printing under the same settings parameter.Surface resistivity numerical value is more little, represents that the electroconductibility of this pattern is good more; Sticking power 0A represents there is not sticking power, and 1A, and 2A, 3A, 4A, 5A represent that sticking power strengthens successively, is expressed as 5A when optimum according to sticking power in this standard.As can be seen from Table 1, be added with contain can additive nano silver conductive ink compare with comparing embodiment, have electroconductibility preferably, lower thermal treatment temp and good sticking power.And when adopting N, N-dimethyl oxidation aniline is when containing the energy additive, and the over-all properties of nano silver conductive ink is more excellent.
Surface resistivity and the sticking power of the nanometer silver coating of table 1 silk screen printing spray ink Printing behind heat treatments at different 30min
Figure BDA0000089315440000071
* annotate: when surface resistivity greater than 1000 Ω/, will not carry out sticking power intensity and measure, with "/" expression.
Table 2 is that the prepared screen printed conductive ink water of embodiment 3 and comparing embodiment 2 is through surface resistivity and sticking power intensity (the ASTM D 3359Adhesion Test standard) performance data of pattern behind heat treatments at different 30min in silk screen printing under the same settings parameter.As can be seen, be added with contain can additive nano silver conductive ink have better electroconductibility, lower thermal treatment temp and good sticking power.
Surface resistivity and the sticking power of the nanometer silver coating of table 2 silk screen printing behind heat treatments at different 30min
Figure BDA0000089315440000072
* annotate: when surface resistivity greater than 1000 Ω/, will not carry out sticking power intensity and measure, with "/" expression.

Claims (10)

1. a silk screen printing nano silver conductive ink is characterized in that, it is made up of following component and quality percentage composition:
The surface is coating the silver-colored particle of the particle diameter of organic protective agent less than 50 nm: 2-50%;
Contain energy additive: 2-30%;
Ink solvent: 40%-90%;
Surface tension modifier: 0.1-5%;
Flow agent: 0.1-10%;
Retarding agent: 0.05-20%;
Thixotropic agent: 0.05-10%;
Sanitas: 0.01-0.1%;
And the quality percentage composition sum of above-mentioned each component is 100%.
2. by the described silk screen printing nano silver conductive ink of claim 1; it is characterized in that; nano-Ag particles is covering organic protective agent, be selected from butyl sulfhydryl, pentan-thiol, hexylmercaptan, heptanthiol, spicy thioalcohol, decyl mercaptan, lauryl mercaptan, tridecyl mercaptan and tetradecyl mercaptan wherein one or both.
3. by the described silk screen printing nano silver conductive ink of claim 1, it is characterized in that, contain and to be selected from N by additive, N-dimethyl oxidation aniline, N, the N-dimethyl is to alkyl oxidation aniline, the dodecyl dimethyl tertiary amine oxide, tetradecyl dimethyl oxidation tertiary amine, hexadecyldimethyl benzyl ammonium tertiary amine oxide, N-oxidation methyl morpholine and nitro-cotton wherein one or both.
4. by the described silk screen printing nano silver conductive ink of claim 1, it is characterized in that, ink solvent, be selected from ethanol, Virahol, butanols, ethylene glycol, Skellysolve A, normal hexane, normal heptane, octane, positive nonane, n-dodecane, pentamethylene, hexanaphthene, methylcyclopentane, methylcyclohexane, sherwood oil, tetrahydrofuran (THF), benzene,toluene,xylene, tetracol phenixin, ethyl acetate and butylacetate wherein one or both.
5. by the described silk screen printing nano silver conductive ink of claim 1, it is characterized in that, surface tension modifier be selected from commodity GSK511, commodity AK505 and commodity CFL7260 wherein a kind of.
6. by the described silk screen printing nano silver conductive ink of claim 1, it is characterized in that, flow agent be selected from commodity HX-3060, commodity GSK-691 and commodity GSK-512 wherein a kind of.
7. by the described silk screen printing nano silver conductive ink of claim 1, it is characterized in that, retarding agent be selected from ethylene glycol phenyl ether, isophorone, Terpineol 350, turps, glycerine, polyoxyethylene glycol and nylon acid methyl esters wherein one or both.
8. by the described silk screen printing nano silver conductive ink of claim 1, it is characterized in that, thixotropic agent be selected from hydrogenated castor oil, Gum Rosin, dammar gum, soluble phenolic resin, petroleum resin and terpine resin wherein one or both.
9. by the described silk screen printing nano silver conductive ink of claim 1, it is characterized in that, sanitas be selected from phenylformic acid, dehydroacetic acid (DHA), methyl p-hydroxybenzoate and ethyl p-hydroxybenzoate wherein one or both.
10. method for preparing the described silk screen printing nano silver conductive ink of claim 1 is characterized in that comprising following process:
1) surface is coating the preparation of the nano-Ag particles of organic protective agent:
The Silver Nitrate of 1 part of quality is dissolved in 120-160 part quality Virahol, stir and to add 1-3 part quality organic protective agent down, in system, add sodium borohydride with 1 part of quality after 5 minutes and be dissolved in solution in 150 parts of quality Virahols and the 30 parts of quality alcohol mixed solvents; Stirring at normal temperature reaction 15-30min adds 80-100 part deionized water more then, filters; Ultra-sonic dispersion is to water, ethanol, acetone successively for filter cake, and filtering and washing impurity obtains the nanometer silver of aterrimus particle diameter less than 50 nm, dries standby naturally;
2) preparation of Nano silver solution:
Can be dissolved in the ink solvent of 2-40 part quality by additive containing of 1 part of quality, get solution A; Under the ultra-sonic dispersion condition, in solution A, slowly add the nanometer silver of 1-20 part quality step 1) system, and the maintenance temperature is lower than, and ultra-sonic dispersion 3 h obtain Nano silver solution under 30 ℃ of conditions;
3) modulation of nano silver conductive ink:
Set by step 2) containing of 1 part of quality can the additive meter in the Nano silver solution of system, to step 2) surface tension modifier of addition 0.01-2.5 part quality successively in the Nano silver solution of system, 0.01-5 the flow agent of part quality, 0.002-10 the retarding agent of part quality and the thixotropic agent of 0.002-5 part quality, regulating its surface tension is 10~40 mN/m, viscosity is 1000~100000 cP, and satisfy of the requirement of silk screen printing ink for rate of drying and ink rheological property, the sanitas that in solution, adds 0.0005-0.05 part quality again, mix, obtain screen printed conductive ink water.
?
CN2011102621474A 2011-09-06 2011-09-06 Screen printing nanometer silver conductive ink and preparation method thereof Pending CN102277036A (en)

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CN107123459A (en) * 2017-03-09 2017-09-01 苏州工业园区英纳电子材料有限公司 Conductive silver paste
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CN107123459A (en) * 2017-03-09 2017-09-01 苏州工业园区英纳电子材料有限公司 Conductive silver paste
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Application publication date: 20111214