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Agranular transparent conductive ink and its preparation method

A transparent conductive, particle-free technology, applied in the direction of copying/marking methods, inks, printing, etc., can solve problems such as changes, impacts on use, and demanding printing substrates, and achieve low preparation costs, wide range of printing substrates, and inks effect of transparency

Inactive Publication Date: 2012-01-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the higher the sintering temperature, the better the conductivity of the dry film, but high temperature sintering has stricter requirements on the printing substrate, and some substrates are prone to property changes at high temperatures, which affects their use.

Method used

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  • Agranular transparent conductive ink and its preparation method
  • Agranular transparent conductive ink and its preparation method
  • Agranular transparent conductive ink and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 30g of sodium citrate was dissolved in 100ml of water, 52g of silver nitrate was dissolved in 150ml of water, then, the resulting silver nitrate aqueous solution was slowly added to the aqueous solution of sodium citrate, stirred at room temperature for one hour, filtered, washed with deionized water 3 times, ethanol After washing once, place it in a dark room at 30°C to dry naturally to obtain silver-white citrate powder.

[0033] Mix 5ml of methanol, 2ml of 1,2-propylenediamine and 3ml of isopropanol evenly, keep the temperature at 5°C, then add 2.0g of silver citrate, stir at 5°C for 1h, pass the obtained colorless and transparent solution through 0.45μm After filtering with a filter membrane, the silver citrate-based ink-jet printing conductive ink is obtained.

[0034] The viscosity of the ink measured at 25°C with the Brookfield DV-II+Pro viscosity tester is 5.27cP, using The DSA-20 dynamic contact angle measuring instrument measured the surface tension of the ink...

Embodiment 2

[0036] The preparation method of silver acetate solid powder is as the preparation method of silver citrate among the embodiment one.

[0037] Dissolve 4.0g of silver acetate in a mixed solvent composed of 3ml of ethanol, 4ml of ethylenediamine and 3ml of ethylene glycol, and stir at 5°C for 1h to obtain a slightly yellow, transparent solution, which is passed through a 0.45μm filter membrane, That is, silver acetate-based conductive ink is obtained. The viscosity of the ink measured at 25°C is 30cP, and the surface tension is 38mN·m -1 , printed on EPSON photo paper using a gravure printing proofing machine, treated at 130°C for 10 minutes, the square resistance measured by a four-probe resistance tester was 0.06Ω / □, and the SEM photo of the obtained conductive pattern is attached to the instruction manual image 3 .

Embodiment 3

[0039] Mix 2ml of n-butanol, 6ml of ethylenediamine and 2ml of ethylene glycol evenly, keep the temperature at 5°C, then add 17g of silver citrate, and stir for 2 hours at a constant temperature. After treatment at 200° C. for 2 minutes, the sheet resistance value of the obtained conductive pattern is 0.005Ω / □ (sheet resistance unit).

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Abstract

The invention discloses an agranular transparent conductive ink which can sinter at low temperature and has good stability, and a preparation method thereof. The conductive ink mainly consists of a solvent organic amine or ammonia water and an organic silver salt. During preparation, one of the solvent organic amine or ammonia water or more than one of other solvents are only needed to be mixed well, then an effective quantity of the organic silver salt is added, and after complete dissolution and dispersion, the conductive ink can be obtained. The conductive ink can form a pattern or a wet film by means of printing or coating, wherein, the organic silver part can be reduced to silver particles in the following heat treatment process so as to form a conductive pattern or conductive film. The conductive ink obtained through the method of the invention can has high stability without adding an extra protective agent. The preparation method put forward in the method has the advantages of simple process, mild reaction condition, short reaction time and low preparation cost.

Description

technical field [0001] The invention relates to the technical field of conductive ink, in particular to a high-stability, low-temperature sinterable particle-free transparent conductive ink containing a solvent organic amine or ammonia water and an organic salt and a preparation method thereof. Background technique [0002] Conductive ink can be applied in the rapidly developing wireless intelligent identification (RFID) electronic tags, printed circuit boards (PCB), flexible printed circuit boards (FPCB), electromagnetic wave shielding materials, solar photovoltaic cells and display electrodes, etc. Compared with the traditional thin-film electronic processing technology, the use of conductive ink for printing can eliminate material waste and simplify processing procedures, which not only improves economic benefits, reduces production costs, but also reduces environmental pollution during the manufacturing process. [0003] The conductive inks in existing research are gener...

Claims

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Application Information

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IPC IPC(8): C09D11/00C09D11/02B41M5/00C09D11/033C09D11/52
Inventor 王虹聂晓蕾邹竞
Owner TIANJIN UNIV
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