PREPARATION METHOD FOR ELECTRICAL CONDUCTIVE SILVER NANOPARTICLE INK AND SILVER NANOPARTICLE FILM

摘要

The present invention relates to a method for producing silver nano ink by using a low molecular weight polyvinylpyrrolidone (PVP) and a method for producing a silver nano film capable of improving electrical conductivity thereof by adding TiO2 to the prepared silver nano ink. The present invention provides a method for producing silver nano ink with excellent electrical conductivity, and a silver nano film produced by adding TiO2 to the silver nano ink. The method comprises the steps of: putting, in distilled water, PVP with a number average molecular weight less than or equal to 50,000, a silver precursor, and a reducing agent, and stirring the mixture to produce a first solution; performing centrifugation of the first solution with a centrifuge to produce a second solution including sediment and a residual solvent separated thereon; separating the residual solvent from the second solution and acquiring the sediment; and dispersing the sediment in a solvent.