The Adsorption and Condensed Film Formation of Cetyltrimethylammonium Bromide at the Mercury/Electrolyte Interface

On the adsorption of cetyldimethylbenzylammonium chloride at the mercury/electrolyte solution interface

“…The condensed film observed for CTAB in KBr in a potential range from −1.5 to −1.9 V [27,28] was not observed here. This has to do with the effect of the anion, in combination with the replacement of a methyl group in CTAB with the benzyl group making the surfactant molecule of CDBACl bigger.…”

“…There are differences in both curves in the kinetics of the decrease of the capacitance with time as well as almost negligible changes in the equilibrium capacitance values; i.e., there is an effect of the initial potential on the kinetics, in accordance with the results found for the adsorption of CTAB in [27].…”

“…In [27][28][29] we studied the adsorption and condensed film formation of dodecyltrimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB), hexadecyltrimethylammonium bromide (CTAB), and octadecyltrimethylammonium bromide (OTAB) on the hanging mercury electrode in the temperature range 5-45 • C. The results showed a marked effect of the chain length of the alkyl chain on film formation. A condensed film was formed at extreme negative potentials and at room temperature only for CTAB in the presence of KBr, with a very low capacitance value, approximately 1.5 µF/cm 2 .…”

“…A combination of this kind of curves can give information on the surface micellization. The effect of the temperature on adsorption is also studied, ranging from 1 to 50 • C. The aim of the paper is to compare its adsorption with the other alkyltrimethylammonium salts studied in [27][28][29] and mainly with hexadecyltrimethylammonium bromine, which has a similar chain length, and to study the influence of the anions.…”

Effect of the deaeration on the adsorption of some cationic surfactants at the mercury/electrolyte solution interface

“…The adsorption and condensed film formation of hexadecyl-(CTAB), and octadecyl-(OTAB) trimethylammonium bromides on the hanging mercury electrode was studied in KBr as supporting electrolyte and at various temperatures [20][21][22]. A condensed film was formed at negative potentials and at room temperature only in the presence of CTAB.…”