Dispersion stability of a ceramic glaze achieved through ionic surfactant adsorption

摘要: Abstract The adsorption of cetylpyridinium chloride (CPC) and sodium dodecylbenzenesulfonate (SDBS) onto a ceramic glaze mixture composed limestone, feldspar, quartz, kaolin has been investigated. Both isotherms the average particle zeta potential have studied in order to understand suspension stability as function pH, ionic strength, surfactant concentration. small amounts cationic CPC primarily negatively charged surfaces particles at pH 7 9 results strong attraction flocculation due hydrophobic interactions. At higher concentrations more than +60 mV from bilayered adsorbed surfactant, providing salt ⩽0.01 M. 0.1 M poor despite substantial values. Three mechanisms for SDBS identified. When anionic monomers either adsorb by electrostatic interactions with few positive surface sites high or like negative dispersion interactions, magnitude increases slightly. this increase is enough promote an −55 mV, whereas lower about −45 mV. suspensions additionally steric repulsion caused thick layers neutrally Ca(DBS) 2 complexes created when interacts dissolved calcium ions carbonate component.