Selective co-deposition of anionic silica particles at hydrophobic surfaces from formulations of oppositely charged polymers and surfactants

Journal of Colloid and Interface Science
Wei WangLennart Piculell

Abstract

The surface-selective surface deposition of anionic hydrophilic silica particles from aqueous polymer-surfactant formulations was investigated by in-situ null-ellipsometry. The formulations, with or without silica particles, contained anionic sodium dodecylsulfate (SDS) and a cationic polymer, cationic hydroxyethyl cellulose (cat-HEC) or a copolymer of acrylamide and methacrylamidopropyl trimethylammonium chloride (AAm/MAPTAC). Surface deposition from the formulations onto model surfaces of either anionic hydrophilic, or hydrophobized, silica was induced by controlled dilution of the formulations into the coacervation region, and was monitored with time by ellipsometry. The dilution simulated a rinsing process in a typical application. In all cases a steady-state surface layer remained after extensive dilution. An enhanced deposition from the silica-containing formulations was found on the hydrophobized silica surface, indicating a substantial co-deposition of silica particles. Much less co-deposition, or none at all, was found on hydrophilic silica. The opposite trend, enhanced co-deposition on hydrophilic silica, was previously found in similar experiments with hydrophobic silicone oil droplets as co-deposants (Clauzel et al....Continue Reading

References

Jul 28, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Eiji TeradaBjörn Lindman
Oct 3, 2006·Advances in Colloid and Interface Science·Tommy NylanderBjörn Lindman
Mar 6, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Amália MezeiTibor Gilányi
Oct 22, 2008·Advances in Colloid and Interface Science·Dominique Langevin
May 26, 2009·Advances in Colloid and Interface Science·Ksenija Kogej
Feb 20, 2010·Advances in Colloid and Interface Science·C D BainR von Klitzing
Mar 26, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Olga SantosLennart Piculell
Dec 21, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Salomé dos SantosLennart Piculell
May 25, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Lennart Piculell
Jan 7, 2014·Experimental Dermatology·Annika Vogt, Ulrike Blume-Peytavi

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Citations

Mar 4, 2020·ACS Applied Materials & Interfaces·Helya NajafiMichael A Bevan

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