Preparation of stable dispersions of Ni nanoparticles using a polymeric dispersant in water

After preparation of aqueous dispersions of Ni nanoparticles with a polymeric dispersant, we investigated the effects of several experimental parameters. We characterized the dispersion stability of Ni nanoparticles on the basis of Turbiscan results, visual inspection, and the ζ potential. The dispersion stability is unaffected by the molecular weight of the dispersant but it is affected by the concentrations of the dispersant and the Ni nanoparticles. In particular, the order in which we add the Ni nanoparticles affects the nature of the Ni product, and the ζ potential decreases as the molecular weight of the dispersant increases. From this work, we obtained the optimum conditions for nanosized Ni aqueous dispersions.