Preparation method and application of surface-enhanced-Raman-spectrum-sensitive conductive silver ink

A surface-enhanced Raman and conductive silver technology, applied in the direction of copying/marking methods, applications, inks, etc., can solve the problems of small-diameter nozzle clogging, substrates that cannot withstand high temperatures, etc., and achieve good electrical conductivity.

Inactive Publication Date: 2017-01-04
NANJING NANOEAST BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large solid particles in traditional slurry, small-diameter nozzles will be blocked, and the substrates of flexible electronic products cannot withstand high temperatures. Therefore, the development of low-temperature conductive inks with small particle sizes has become the core of the development of flexible electronic technology.

Method used

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  • Preparation method and application of surface-enhanced-Raman-spectrum-sensitive conductive silver ink
  • Preparation method and application of surface-enhanced-Raman-spectrum-sensitive conductive silver ink
  • Preparation method and application of surface-enhanced-Raman-spectrum-sensitive conductive silver ink

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preparation example Construction

[0043] Step 2, preparation of nano-silver conductive ink

[0044] The self-synthesized nano-silver is dispersed in the water phase solvent, and has good dispersibility in the water phase solvent. Because nano-silver has a small particle size and a very low melting point, the suspension of silver nanoparticles is used as a conductive ink, which can be used to make conductive circuits by inkjet printing. The water-based conductive ink uses a mixed solution of triethylene glycol monoethyl ether and water as the dispersion solvent for nano-silver. Since triethylene glycol monoethyl ether has a relatively high boiling point (256°C), it has moisturizing properties to slow down the drying speed of the ink and avoid particle accumulation. The resulting nozzle clogging can also weaken the "coffee ring" effect of ink droplets. The purified Ag@PVP nanocolloid was used as the conductive phase, and triethylene glycol monoethyl ether, glycerin, and isopropanol were used as the main compone...

Embodiment 1

[0059] Synthesis of PAA-coated silver nanoparticles:

[0060] First, weigh a certain amount (0.1g, 0.3g, 0.5g, 0.7g) of polyacrylic acid (PAA) and 1g of silver acetate (CH 3 COOAg), dissolved in 90mL of pure water, heated to a certain temperature (25°C, 50°C, 75°C), stirred at a rate of 500rpm until clear and transparent; then, after weighing 1g of ascorbic acid dissolved in 10mL of pure water, use a trace The syringe pump slowly drips it into the reaction solution at a rate of 60mL / h, adjusts the stirring rate to 700rpm, continues the reaction for 1h, and uses a tangential flow ultrafiltration system to purify and separate the obtained product to remove unreacted Impurities, free ions and excess PAA, etc., were obtained from PAA-coated silver nanoparticles (Ag@PAANPs). The particle size of Ag@PAANPs is concentrated in 10-30nm, the average particle size is 20nm, and the monodispersity is good.

[0061] The purified Ag@PAA nanocolloid was used as the conductive phase, and tri...

Embodiment 2

[0065] Preparation of solution-type silver ink:

[0066] First, weigh 10 g of silver acetate (CH 3 COOAg) was dissolved in a three-necked flask containing 25 mL of ammonia water, protected from light, and stirred at a rate of 500 rpm for 15 min until the solution was clear and transparent; another 2 mL of formic acid (HCOOH) was injected into the reaction at a rate of 8 mL / h using a micro-syringe pump In the solution, adjust the stirring rate to 800rpm, keep away from light, and continue to react for 15 minutes; finally take out the solution, keep it overnight in the dark, take the supernatant, and filter it with a filter membrane with a pore size of 0.22 μm to obtain a stable solution. ink solution.

[0067] Inkjet printing was performed with an Epson Stylus Photo R230 printer. The base material adopts flexible substrate material polyimide (PI). Before printing, use KOH to modify the surface of the PI film to increase the wetting effect of the film and the ink. The specifi...

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Abstract

The invention provides a preparation method and application of a surface-enhanced-Raman-spectrum-sensitive conductive silver ink. In the method, the conductive silver ink is prepared by using polyvinylpyrrolidone-coated silver nanoparticles (prepared by chemical reduction) as a conductive phase and using triglycol monoaether, glycerol, isopropanol and other organic carriers as main components. The conductive silver ink can be used for printing favorable-linearity patterns on a flexible substrate by using a commercial piezoelectric ink-jet printer. When the conductive silver ink is used for manufacturing the radio-frequency label, the functions of the antenna circuit are ensured due to the conductive characteristic; the Raman enhanced detection can perform the functions of marking and forgery prevention; and the surface-enhanced-Raman-spectrum-sensitive conductive silver ink applicable to wireless radio-frequency label ink-jet printing is simple to prepare and convenient to use, and thus, has favorable large-scale application prospects, thereby providing multiple forgery prevention functions for the wireless radio-frequency forgery prevention labels.

Description

technical field [0001] The invention relates to a preparation method and application of a nanometer material, in particular to a preparation method and application of a surface-enhanced Raman spectrum-sensitive conductive silver ink. Background technique [0002] At present, a large number of counterfeit and shoddy products of many expensive commodities, such as cigarettes, famous wines, and famous teas, flow into the market, which has a great impact on the market order. Anti-counterfeit labels made by traditional anti-counterfeiting printing technology are easy to be imitated, and it is a good method to combine traditional anti-counterfeiting technology with radio frequency identification for anti-counterfeiting. [0003] Radio frequency tags, also known as electronic tags, are radio frequency identification systems and a non-contact resource access technology through radio waves. The working principle of RFID is that when the electronic tag enters the magnetic field sensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/30C09D11/38C09D11/50B41M5/00
CPCC09D11/52B41M5/0064C09D11/30C09D11/38C09D11/50
Inventor 张宇尉兵崔颜韩国志王建国
Owner NANJING NANOEAST BIOTECH
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