title: Interactions and dispersion stability of aluminum oxide colloidal particles in electroless nickel solutions in the presence of comb polyelectrolytes.
abstract: The effect of comb polyelectrolytes on the dispersion stability of colloidal alumina particles in DI water and commercial electroless nickel (EN) solutions was investigated. Adsorption of polyelectrolytes and major EN components onto colloidal alumina was assessed by TGA, chemical analysis, and zeta potential measurements. Zeta potential measurements were made during titrations of comb-polyelectrolyte-stabilized dispersions with EN solutions to full ionic strength for the first time. The compilation of titration curves made with varying amounts of comb polyelectrolytes provides high resolution and novel insight into the particle/surfactant/EN systems. Continuous decrease in particle/EN components surface interactions with the increase in comb polyelectrolyte coverage is observed. Laser diffraction measurements reveal steric stabilization of nano- and submicronmeter alumina dispersions in both DI water and EN solutions with >7 wt% and >2 wt% comb polyelectrolyte, respectively.
authors.affiliation: Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Testing and Research, Uberlandstrasse 129, CH-8600 Dübendorf, Switzerland. yoram.dehazan@empa.ch
authors.forename: Yoram
authors.initials: Y
authors.lastname: de Hazan
authors.forename: Torben
authors.initials: T
authors.lastname: Reuter
authors.forename: Dennis
authors.initials: D
authors.lastname: Werner
authors.forename: Rolf
authors.initials: R
authors.lastname: Clasen
authors.forename: Thomas
authors.initials: T
authors.lastname: Graule