Stability of colloidal silica, sikron and polystyrene latex influenced by the adsorption of polycations of different charge density

Multiinstrument Study of the Electrophoretic Mobility of Quartz

“…The observation that Malvern zetameter gives more negative ζ potentials of silica in the acidic range than the other instruments is consistent for quartz and fumed silica and two of three published electrokinetic studies performed by means of Malvern zetameter also do not support existence of IEP for quartz (Table 1). Bauer et al (20) found one of the highest IEP ever reported for quartz, but they used Malvern Zeta Master, while the Zetasizer 3000 model was used in the present study. It remains an open question if the ζ potentials obtained by means of DT 1200 and Delsa are overestimated (too positive) or rather the ζ potentials obtained by means of Malvern are underestimated (too negative), but at least one of these alternatives is true.…”

Thin adsorbed films of a strong cationic polyelectrolyte on silica substrates

“…In most of these applications, the underlying processes are the adsorption of these polyelectrolytes to negatively charged substrates, the resulting charge reversal and the substantial modification of the surface forces [10][11][12][13][14]. The adsorption of polyelectrolytes to oppositely charged substrates was also studied in detail from the theoretical point of view [15][16][17].…”

Effect of charge density on the formation and salt stability of polyelectrolyte complexes

“…This copolymerization proceeds as nearly ideal reaction because the polymer composition is equal to the monomer feed not only at the very beginning of the reaction but up to a conversion of more than 70%. [14] Thus, linear polymers of different charge densities but approximately equal molecular weights should be available by a batch reaction.…”