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A technology of conductive ink and nano-silver, which is applied in ink, household utensils, applications, etc., can solve the problems of inconvenient preparation and storage, and achieve the effects of low environmental and equipment requirements, mild reaction conditions, and good particle dispersion
Inactive Publication Date: 2017-03-15
SHAANXI HUANKE BIOLOGICAL TECH CO LTD
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The only downside is that most of the organic compounds of silver are easil...
Method used
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Embodiment 1
[0021] A preparation method of nano-silver conductive ink, comprising the steps of:
[0022] (1) Use a precision balance to weigh 2.0 g of silver nitrate and 1.5 g of PVP into 100 mL of water, stir vigorously under a magnetic stirrer until the solution is colorless and transparent;
[0023] (2) Prepare a sodium borohydride solution with a concentration of 40 mg / mL and stir it under magnetic stirring to prevent splashing and dissolve it completely;
[0024] (3) Take 10mL of sodium borohydride solution and add it dropwise to the previously prepared silver nitrate solution at a rate of 2mL / min, the reaction solution changes from colorless to black-yellow;
[0025] (4) After the dropwise addition, the reaction process continued for 8 minutes, and the whole reaction process was carried out under the condition of vigorous stirring;
[0026] (5) After the reaction is over, filter the reactants to remove large particles and impurities;
[0027] (6) Centrifuge the filtered reactant; ...
Embodiment 2
[0033] The centrifugation method is the same as in Example 1.
[0034] A preparation method of nano-silver conductive ink, comprising the steps of:
[0035] (1) Use a precision balance to weigh 2.5 g of silver nitrate and 1.0 g of PVP into 110 mL of water, stir vigorously under a magnetic stirrer until the solution is colorless and transparent;
[0036] (2) Prepare a sodium borohydride solution with a concentration of 40 mg / mL and stir it under magnetic stirring to prevent splashing and dissolve it completely;
[0037] (3) Take 10mL of sodium borohydride solution and add it dropwise to the previously prepared silver nitrate solution at a rate of 2mL / min, the reaction solution changes from colorless to black-yellow;
[0038] (4) After the dropwise addition, the reaction process continued for 8 minutes, and the whole reaction process was carried out under the condition of vigorous stirring;
[0039] (5) After the reaction is over, filter the reactants to remove large particles...
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Abstract
The invention discloses a preparation method of nanosilver conductive ink, and belongs to the field of printing materials. The preparation method is characterized by comprising the following steps: taking silver nitrate and PVP (Polyvinyl Pyrrolidone), adding the above substances into water, and intensively stirring under a magnetic stirrer until a solution is colorless and transparent; preparing a sodium borohydride solution; taking the sodium borohydride solution, and adding into the prepared silver nitrate solution; centrifuging a filtered reactant; drying a centrifuged product in an air blast drying box at the drying temperature of 45 to 60 DEG C, so as to obtain nanosilver powder; adding the nanosilver powder into a dispersing solvent, stirring and performing ultrasonic dispersion, thus obtaining the nanosilver conductive ink. According to the preparation method, a solution synthesis method is used to generate nanosilver particles wrapped by a surfactant in an aqueous solution. agglomerated large particles and impurities are removed by filtering,then centrifuging is performed repeatedly, and nanosilver powder is cleaned by sequentially using deionized water, acetone and ethanol; the nanosilver conductive ink has the advantages of low requirement on environment and equipment, good particle dispersity and uniform particle size; the preparation method disclosed by the invention has the advantages of small particle size of the particles, good dispersity and mild reaction conditions.
Description
technical field [0001] The invention belongs to the field of printing materials, in particular to a preparation method of nano-silver conductive ink. Background technique [0002] In recent years, regarding the manufacture of conductive circuits, the emerging printed electronic technology, as a flexible, fast and environmentally friendly manufacturing method, has attracted great attention from developed countries such as the United States, the European Union, and Japan. It not only has a significant impact on the PCB manufacturing industry, but also has great significance on the development of silicon-based microelectronics, and has become a technical hotspot of common concern in the material, electronics, and manufacturing industries. Conductive ink, printing technology and post-processing technology determine the performance of paper-based flexible circuits. Conductive ink is the core key material, and its technical progress is the cornerstone for faster and wider applica...
Claims
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Application Information
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