Nanoparticle conductive ink and preparation method thereof

A nanoparticle and conductive ink technology, which is applied in the formation of conductive patterns, inks, household appliances, etc., can solve the problems of limited application, low resistivity, lack of conductivity data, etc., and achieve the effect of excellent conductivity

Active Publication Date: 2010-03-31
微墨智能科技(南通)有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

Chinese Patent No. CN 101089058A discloses a conductive ink composition for inkjet printing. The conductive ink composition is composed of nanoparticles and several solvents and regulators. Vinylpyrrolidone PVP is reacted at high temperature in ethylene glycol solution to obtain nano-silver particles. The size of the nano-particles is 16nm, but there is a lack of conductivity data in this patent; if the required heating temperature is too high or the heating time is very long, the ideal silver particle can be obtained. conductivity, which may greatly limit the application of the method
Publication No. WO2007 / 055443A1 of the World Intellectual Property Office discloses a preparation method of nano-conductive ink, the nano-particles are composed of PVP-coated nanoparticles, the conductive ink is heated at 250°C for 30 minutes, and the resistivity is 8.98× 10-6Ω·m; however, although this method can obtain a final product with lower resistivity, the temperature of 250°C is still too high when the ink is printed on polypropylene or polyethylene or polyethylene terephthalate, etc. Post-heating of the substrate, these inexpensive substrates will deform, which greatly limits the application of the method

Method used

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  • Nanoparticle conductive ink and preparation method thereof

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preparation example Construction

[0034] In order to obtain nanoscale particles with uniform size dispersion, the preparation method comprises the following steps:

[0035] (1) Prepare solution A containing metal or metal compound precursor and solution B containing reducing agent respectively;

[0036] (2) Solution A is added into the reactor, and stirred evenly;

[0037] (3) While stirring, add solution B dropwise to the reaction kettle, after the dropwise addition, continue to stir for 1 to 48 hours, take out solution A, evaporate the solvent of solution A completely, wash and dry to obtain nanoparticles ;

[0038] Wherein, the metal or metal compound precursor is a complex composed of a metal salt and a stabilizer;

[0039] Examples of the metal salt may be silver nitrate, silver carbonate, silver acetate, silver sulfate, silver oxalate, silver 2-ethylhexanoate, gold acetate, palladium oxalate, copper-ethylhexanoate, iron stearate, formic acid Nickel, zinc citrate, copper cyanide, cobalt carbonate, plat...

Embodiment 1

[0053] 48 grams of silver nitrate and 204 grams of hexadecylamine are dissolved in a mixed solution of 360 milliliters of ethanol and water, wherein the volume ratio of ethanol and water is 4:3, and the temperature of the solution is maintained at 60° C., stirred for 2-12 hours, and then After the solvent was completely evaporated, it was added into a mixed solution of water and chloroform, the chloroform solution was taken out, and 115 g of complex solids were recrystallized with ethanol. 115 grams of complex solids were dissolved in 2 liters of toluene, 22 grams of sodium borohydride was dissolved in 2 liters of deionized water three times, and the aqueous solution of sodium borohydride was added dropwise to the reaction kettle for reduction reaction, and stirred for 6 to 24 hours. After one hour, the upper layer of nano-silver solution was separated by standing. After the solvent was evaporated from the nano-silver solution, it was washed with 400 milliliters of acetone, dr...

Embodiment 2

[0056] The preparation method of conductive ink is the same as example 1.

[0057] After printing the conductive ink on the substrate, heat it at 100-160°C for 0.5-5min. It takes longer at room temperature. Use a four-probe resistivity tester to measure the resistivity. The results are shown in Table 1.

[0058] Table 1

[0059]

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Abstract

The invention discloses nanoparticle conductive ink and a preparation method thereof. The nanoparticle conductive ink comprises nanoparticles, solvent and viscosity adjusting agent. The preparation method comprises the following steps: respectively preparing solution A containing metal or metallic compound precursor and solution B containing reducing agent; adding the solution A into a reaction kettle and stirring evenly; dropwise adding the solution B into the reaction kettle under the stirring condition, after finishing dropwise adding, continuing to stir for 1-48 hours; taking out the solution A and completely evaporating the solvent in solution A; cleaning and drying to obtain the nanoparticles. The invention has the advantages that the nanoparticle conductive ink is applied to the fields of printed circuit boards, flexible printed circuit boards or radio frequency identification electronic tags and the like; by carrying out spray ink printing on the base materials and low-temperature sintering, the nanoparticles can be connected with each other, thus the excellent electrical conductivity can be obtained.

Description

【Technical field】 [0001] The invention relates to the technical field of conductive ink, in particular to a nano particle conductive ink and a preparation method thereof. 【Background technique】 [0002] Conductive inks for inkjet printing have received great attention in recent years, and have been used in technical fields such as printed circuit boards (PCBs), flexible printed circuit boards (FPCs), and radio frequency identification (RFID) electronic tags. With the rapid development of the IT industry, the demand for smaller, highly integrated electronic products and data communication devices is gradually expanding. Conductive inks prepared with micron or larger particles in the traditional sense can no longer meet the requirements, while nanoparticle conductive inks are An ideal solution. [0003] Chinese Patent No. CN101010388 conductive ink and its manufacturing method discloses conductive ink and its manufacturing method, relates to a variety of conductive ink compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/02H05K3/12C09D11/52
Inventor 徐海生陈涛王莉
Owner 微墨智能科技(南通)有限公司
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