Naslov
Charging Mechanisms of the Composite Surfaces: Potentiometric Titration Studies

Autori
Čakara, Duško

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
29th Conference of the European Colloid and Interface Society

Mjesto i datum
Bordeaux, Francuska, 06.09.2015. - 11.09.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Surface ; charge ; pK ; pH ; Electrical ; Double ; Layer ; Potentiometric ; Titration

Sažetak
The methodology for studying the pH-dependent charging of the composite polyelectrolyte/nanoparticle surfaces by means of high-precision potentiometric titrations with ionic strength control is presented. The experimental charging isotherms were determined for several systems with different surface morphologies in which the forces that govern the charging behaviour are either purely electrostatic, or interplaying electrostatic and hydrophobic. These include the strongly cationic poly(diallyldimethylammonium chloride) adsorbed to weakly acidic silica or carboxylate latex surfaces [1, 2], weakly basic spherical brushes of poly(N, N dimethylaminoethylmethacrylate) at poly(styrene) surface [3], and chitosan adsorbed on cellulose fibers [4]. The experimentally determined isotherms can be fitted in terms of models which take into account the dissociation reactions and the electrostatic interactions at the Poisson-Boltzmann level.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA