Determination of critical micelle concentration of cetyltrimethylammonium bromide in presence and absence of KCl and NaCl in aqueous media at room temperature by viscosity measurement

Abstract

Viscosity measurement of cetyltrimethylammonium bromide in presence and in absence of KCl and NaCl in aqueous media is done. The results showed a sharp increase in viscosity with increase in concentration of cetyltrimethylammonium bromide. Also, the viscosity increases with addition of salts. The viscosity of cetyltrimethylammonium bromide is found more in presence of KCl than NaCl in aqueous media. In presence of monovalent salts, the critical micelle concentration (cmc) value decreases which is explained on the basis of nature and ionic strength of the added ion. The graphs of viscosity versus concentration are used in determining the critical micelle concentration (cmc).

Study of the Effect of Chlorides and Bromides on Critical Micelle Concentration and Partial Molar Volume of Quaternary Ammonium Salt

“…Z týchto hodnôt ďalej vyplýva, že soľ KCl hodnotu CMC znižovala efektívnejšie ako NaCl. K podobnému záveru dospeli aj v iných prácach [21][22][23][24] .…”