Preparation method of nanosilver conductive ink

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...

AI Technical Summary

Problems solved by technology

The only downside is that most of the organic compounds of silver are easily decomposed, which brings a lot of inconvenience to its preparation and storage.