Synthesis and comparative behaviour study of fluorocarbon and hydrocarbon cationic surfactants in aqueous media

Aggregation of new bipolar glucosyled and cationic fluoroamphiphiles in aqueous media

“…(5), increases in the range x = 7 to x = 11 (Table 1). Despite the same fluorocarbon tail length, the F9-Glu-NI compound exhibits a larger value of a 0 than the F9-NI [17], that is, 1.10 vs. 0.69 nm 2 /molecule. As the cross-section molecular area is almost constant (0.68 ± 0.01 nm 2 ) for the Fx-NI series, the contribution of the glucosyl group to a 0 of the Fx-Glu-NI can be appreciatively evaluated from Fig.…”

“…The b values thus calculated for Fx-Glu-NI are reported in Table 1. However, to ovoid the overestimated b values obtained by this method [45,46] who leads to underestimated values of the aggregation number, we have recently proposed a better calculation of this parameter [17] by using another approach of the Evans Eq. (10), taken into account the results obtained for homologous surfactants with iodide counter ions [35].…”

“…In our study, the (kÁk 0 ) term is taken as 4.33 or (kÁk 0 ) 3/2 = 9, from Refs. [17,35]. The micellar aggregation number N Ag values obtained from Eq.…”

“…In a previous work [17], we studied a series of surfactants denoted later as Fx-NI, which present the same molecular structure as the Fx-Glu-NI, with the exception of the presence of the glucosyl group. In every series of compounds, x is equal to y + 1.…”

“…Recently [17], we compared the aggregation and surface active properties of a new class of fluorocarbon and hydrocarbon cationic surfactants in aqueous media by using tensiometry and conductimetry. This study has essential significance for basic colloid science.…”