Effect of pH and ionic strength on the adsorption of cetylpyridinium chloride and the coadsorption of phenoxypropanol at a silica/water interface

Dispersion stability of a ceramic glaze achieved through ionic surfactant adsorption

“…At high salt concentrations, the adsorption starts at a higher surfactant concentration due to the screening of the surface charge by the electrolyte, but it increases more steeply due to the diminished lateral repulsions between adsorbed surfactant molecules [9]. Monticone and Treiner [11,12] support this mechanism, reporting that adsorption of CPC on silica particles yields an adsorption plateau for a concentration which corresponds well with the surfactant CMC. The adsorbed amount increases with increasing ionic strength and increasing pH.…”

“…In previous studies, the effect of pH, ionic strength, and surfactant concentration on the adsorption of surfactants has only been studied on the single mineral ceramic glaze components, namely, silica [8][9][10][11][12][13][14][15], quartz [16,17], feldspar [18], kaolinite [19][20][21][22][23][24][25][26][27], and limestone [28][29][30].…”

Adsorption of CTAB onto perlite samples from aqueous solutions

“…This effect is presumably due to increased attraction between Cl − ions in aqueous solution and positive sites on perlite surface. The increase in the adsorption of CTAB on both unexpanded and expanded perlite surfaces may be due to the increasing hydrophobic interactions between long alkyl chains of adsorbate and the electrostatic interactions between head group of surfactant and perlite surface [30]. It has been stated the major driving forces for adsorption of ionic surfactants onto oxide surfaces are electrostatic interaction between the headgroups and the surface and the hydrophobic interactions between the alkyl chains [31].…”

Adsorption Isotherms of Cetylpyridinium Chloride with Iron III Salts at Air/Water and Silica/Water Interfaces

“…The electrostatic screening effect decreases the repulsion between the surfactant ions; hence more space is available at the solid/water interface, hence the adsorption increase. This is observed, for example, in the case of cetylpyridinium chloride at the silica/water interface in the presence of added NaCl (7). Here, it is the concentration of the chloride ions that is responsible for the adsorption changes.…”