Dispersion Stability of Ni Nanoparticles in Ethanol with Poly (1-Vinyl-2-Pyrrolidone)
The stability of nanosized Ni dispersions with varying concentrations of poly (1-vinyl-2- pyrrolidone) (PVP) was investigated by means of a visual inspection, transmission profile measured by Turbiscan, zeta potential, and transmission electron microscopy. For dispersions with PVP, the ζ potential values varied from positive charge to negative charge. For dispersion with a 0.04 weight percentage of PVP, the ζ potential value showed 31.71 mV, which was the highest value, and the flocculation of Ni nanoparticles was not observed. Stable dispersions of Ni nanoparticles were produced by electrostatic, steric interactions, and the formation of bridging aggregation.
Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee
E. H. Lee et al., "Dispersion Stability of Ni Nanoparticles in Ethanol with Poly (1-Vinyl-2-Pyrrolidone)", Materials Science Forum, Vols. 510-511, pp. 206-209, 2006