METHOD FOR PRODUCING SILVER NANOPARTICLE DISPERSION LIQUID, SILVER NANOPARTICLE DISPERSION LIQUID, INKJET INK AND IMAGE FORMING METHOD USING SAME

摘要

The purpose of the present invention is to provide a method for producing a silver nanoparticle dispersion liquid that contains few coarse silver nanoparticles and has high dispersion stability. A method for producing a silver nanoparticle dispersion liquid according to the present invention comprises: a step wherein an aqueous solution that contains a silver ammine complex, a polymer dispersant that has an acidic group and a polyalkylene oxide group, and an alkanolamine that serves as a reducing agent are mixed with each other, thereby causing reduction of the silver ammine complex and consequently obtaining an aqueous dispersion liquid that contains silver nanoparticles, the polymer dispersant that adheres to at least a part of the surfaces of the silver nanoparticles, and water; and a step wherein the aqueous dispersion liquid that contains silver nanoparticles is purified.