Layer thickness for high molecular weight cationic polyacrylamides adsorbed on a surface with a preadsorbed poly-diallyldimethylammonium chloride

Desorption of bottle-brush polyelectrolytes from silica by addition of linear polyelectrolytes studied by QCM-D and reflectometry

“…There are several experimental studies [4] on systems in which the polyelectrolyte competes with a similarly charged sur- factant for the adsorption sites on an oppositely charged surface. However, competitive adsorption studies [5][6][7][8][9] between (linear) polyelectrolytes, in which polyelectrolytes with different surface affinity compete, are rather few, and to our knowledge there are no reports describing the surface exchange of bottle-brush polyelectrolytes with linear polyelectrolytes. However, there are contributions [10,11] in which surface exchange in brush layers, formed through the adsorption of amphiphilic polymers, has been studied.…”

Coating of silica sand with aluminosilicate clay

“…The bonding mechanisms of polymers to silica [8][9][10][11][12] and clay minerals [5,6,[13][14][15] are well understood. Nonionic polymers bind to silica surfaces through H-bonding of hydroxyl (OH), amino (NH 2 ), carbonyl (C=O), and other polar functional groups.…”

Interactions between kappa-carrageenan and some surfactants in the bulk solution and at the surface of alumina

“…The last mentioned type of the adsorbate-adsorbent interaction occurs between the hydroxyl groups of Carr and the hydroxyl groups from Al 2 O 3 , especially when the value of the adsorption pH (in this case 7) is near pH pzc point of the adsorbent (7.5) (Schwarz et al, 2000). The conformation of the polymer on the solid surface depends on three factors: the charge density of the adsorbent, the charge of the polyelectrolyte and the ionic strength of the background electrolyte (Stemme & Ödberg, 1999). As far as the influence of the surfactants on the adsorption of Carr at alumina is concerned, the addition of such compounds to the adsorption system may cause both the decrease (in the case SDS) or the increase of the adsorption (in the case of the remaining surfactants and their mixtures).…”