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- W2047133092 abstract "Surface tension of aqueous solutions of dialkyldimethylammonium bromide RR'N+ (CH3)2Br− with R,R': C2,C14 ; C4, C12; C8,C8 has been measured at 20°C. Critical micelle concentration (cmc), saturated surface excess from Gibbs equation isotherm, surface tension reduction at the cmc, were determined. Comparison is made in isomeric series and literature data for anionic surfactants. Interfacial tensions between alkanes (hexane to tetradecane) and aqueous solutions of RR′N+ (CH3)2Br− were also measured near the cmc at 45°C, with increasing NaCl concentration (0 to 6% Wt/Wt). Most of the interfacial tensions are rather high (1 to 18 mN/m). The minimum value (0.4 mN/m) is obtained for the symmetrical ammonium bromide against hexane in the range 2 – 6% NaCl. Comparison is made with linear and symmetrical sodium heptylnonylbenzenesulonate C7C8CHØSO3Na, sodium dihexyl and dinonylsulfonate (C6) 2CHSO3Na and (C9) 2CHSO3Na which give low interfacial tensions." @default.
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- W2047133092 date "1985-01-01" @default.
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- W2047133092 title "Variation of some micellar and interfacial properties with increasing branching for anionic and cationic surfactants" @default.
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- W2047133092 doi "https://doi.org/10.1016/0378-3812(85)90044-5" @default.
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