Abstract
Speed of sound and density properties of ternary water-tetradecyltrimethylammonium bromide-pentanol system at 15, 25 and 35°C and of water-hexadecyltrimethylammonium bromide-pentanol system at 25, 35 and 45°C were measured at fixed alcohol concentration as a function of surfactant concentration. The apparent molar volumes Vϕ,R and isentropic compressibilities K Sϕ,R of pentanol in micellar solutions as a function of the surfactant concentration show irregular behavior which depends on the alkyl chain length of the surfactant and tends to disappear with increasing temperature. These anomalies are ascribed to micellar transitions. For both surfactants at high concentrations, Vϕ,R decrease and the magnitude of the change seems to depend on the type of densimeter used. This observation is tentatively explained in terms of a correlation between the micellar structure and features of the densimeter. From this work and literature data, the apparent molar isothermal compressibilities K Tϕ,R of the alcohol in micellar solutions were calculated at 25°C. Vϕ,R , K Sϕ,R and K Tϕ,R are interpreted in terms of the distribution constant of the alcohol between the aqueous and the micellar phases and of the apparent molar property of the alcohol in the micellar and the aqueous phases. For a given surfactant increasing the temperature increases Vϕ,R and K Sϕ,R in the micellar phase while the distribution constant is weakly dependent. At a given temperature, an increase in the alkyl chain length of the surfactant increases the apparent molar volume and slightly changes the apparent molar compressibility of the alcohol in the micellar phase.
Similar content being viewed by others
References
R. De Lisi, V. Turco Liveri, M. Castagnolo, and A. Inglese,J. Solution Chem. 15, 23 (1986).
R. De Lisi, S. Milioto, and R. Triolo,J. Solution Chem. 17, 673 (1988).
R. De Lisi, S. Milioto, M. Castagnolo, and A. Inglese,J. Solution Chem. 16, 373 (1987).
R. De Lisi, S. Milioto, and V. Turco Liveri,J. Colloid Interface Sci. 117, 64 (1987).
R. De Lisi, and S. Milioto,J. Solution Chem. 17, 245 (1988).
S. Milioto, D. Romancino, and R. De Lisi,J. Solution Chem. 16, 943 (1987).
R. De Lisi and S. Milioto,J. Solution Chem. 16, 676 (1987).
R. De Lisi, S. Milioto, and R. E. Verrall,J. Solution Chem. 19, 97 (1990).
F. Quirion and J. E. Desnoyers,J. Colloid Interface Sci. 112, 565 (1986).
M. Iqbal and R. E. Verrall,J. Phys. Chem. 91, 967 (1987).
J. E. Desnoyers and Philip,Can. J. Chem. 50, 1094 (1972).
G. S. Kell,J. Chem. Ing. Data 12, 66 (1967).
R. De Lisi, S. Milioto, and R. E. Verrall,J. Solution Chem. 19, 665 (1990).
G. Lindblom, B. Lindman, and L. Mandell,J. Colloid Interface Sci. 42 400 (1973).
P. Ekwall, L. Mandell, and P. Solyom,J. Colloid Interface Sci. 35, 519 (1971).
H. Nery, N. Kamenka, M. C. Puyal, R. Rymden, and P. Stilbs,J. Phys. Chem. 88, 5048 (1980).
F. Quirion and J. E. Desnoyers,J. Colloid Interface Sci. 115, 176 (1987).
R. De Lisi and V. Turco Liveri,Gazzetta Chim. Ital. 13, 371 (1983).
C. Treiner,J. Colloid Interface Sci. 93, 33 (1983).
R. Zana, S. Yiv, C. Strazielle, and P. Lianos,J. Colloid Interface Sci. 80, 208 (1981).
P. Mukerjee,Adv. Colloid Interface Sci. 1, 241 (1967).
R. De Lisi, E. Fisicaro, and S. Milioto,J. Solution Chem. 17, 1015 (1988).
R. F. Tuddenham and A. E. Alexander,J. Phys. Chem. 66, 1839 (1962).
M. T. Bashford and E. M. Woolley,J. Phys. Chem. 89, 3173 (1985).
D. F. Evans and P. J. Wightman,J. Colloid Interface Sci. 86, 515 (1982).
R. De Lisi, C. Genova, R. Testa, and V. Turco LiveriJ. Solution Chem. 13, 121 (1984).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
De Lisi, R., Milioto, S. & Verrall, R.E. Volumes and compressibilities of pentanol in aqueous alkyltrimethylammonium bromide solutions at different temperatures. J Solution Chem 19, 639–664 (1990). https://doi.org/10.1007/BF00647386
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00647386