Detection of micellar structures in oil-water-surfactant systems with a photoacoustic method

• Autorzy: Pogorzelski S. J. , Szurkowski J. , Śliwiński A.
• Języki publikacji: EN

Abstrakty

EN

Model studies were performed with a layered system consisting of thin olive oil layers (25-250žm in thickness) spread over the water surface using a photoacoustic method. Significant variations in the signal phase and amplitude found out at the interfaces (air/oil and oil/water) as well as at a depth of 9-13žm beneath the oil surface point to the formation of organized clathrate molecular structures under the film-covered surfaces and micellar structures of surfactants if present in a bulk oil phase at an appropriate concentration (above CMC) and temperature (Krafft point). Such organized structures have different thermodynamic properties (like specific heat or thermal diffusivity, discussed in terms of classical thermodynamics of thin surface layers) that is supposed to affect the photoacoustic effect used for depth profiling.

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 1999
• Tom: Vol. 24, no. 3
• Strony: 319--330
• Opis fizyczny: Bibliogr. 18 poz., rys., wykr.

Twórcy

autor

Pogorzelski S. J.

autor

Szurkowski J.

autor

Śliwiński A.

• Institute of Experimental Physics, University of Gdańsk, 80-952 Gdańsk, Wita Stwosza 57, Poland,

Bibliografia

• [1] A.W. Adamson, Physical chemistry of surfaces, Wiley, New York 1982.
• [2] W. Alpers, H.-J. Blume, W.D. Garrett and II. Huhnerfuss, The effect of monomolecular surface films on the microwave brightness temperature of the sea surface, Int. J. Remote Sens., 3, 457-463 (1982).
• [3] S. Ballaro, F. Mallamace and F. Wanderlingh, Ultrasonic attenuation in microemulsions and structural transitions, Phys. Letters, 70A, 497-499 (1979).
• [4] G.P . De Loor, [in:] Remote Sensing for Environmental Studies, E. Shada [Ed.], Springer, Berlin 1976.
• [5] P. Ekwall, A phase diagram of a water-surfactant-oil system, Adv. Liquid Cryst., 1, 1-12 (1975).
• [6] F. Franks, Water — A comprehensive treatise, Vol. 4, Plenum, New York 1975.
• [7] H. Huhnerfuss and W. Alpers, Molecular aspects of the system water/monomolecular surface film and the occurrence of a new anomalous dispersion regime at 1.43 GHz, J. Phys. Chem., 87, 5251-5258 (1983).
• [8] B. Lindman [Ed.], Micelles (Topics in current chemistry), Vol. 87, Springer-Verlag, New York 1980.
• [9] P.S. Liss, Chemistry of the sea surface microlayer, [in:] Chemical Oceanography, Vol. 2, J.P . Riley and G. Skirrow [Eds.], Academic Press, New York 1975.
• [10] G. Nemethy, Hydrophobe Wechselwirkungen, Angewandte Chemie, 79, 260-271 (1967).
• [11] G. Nemethy and H.A. Scheraga, The structure of water and hydrophobic bonding in proteins. III. The thermodynamic properties of hydrophobic bonds in proteins, J. Phys. Chem., 66,1773-1789 (1962).
• [12] S.J. Pogorzelski, Application of 2D plymer film scaling theory to natural sea surface films, Colloids and Surfaces A: Physicochem. Engn. Aspects, 114, 297-309 (1996).
• [13] S.J. Pogorzelski, Structural and thermodynamic characteristics of natural marine films derived from force-area studies, Colloids and Surfaces A (1998) (submitted).
• [14] S.J. Pogorzelski, A.M. Stortini and G. Loglio, Natural surface film studies in shallow coastal waters of the Baltic and Mediterranean Seas, Cont. Shelf Res., 14, 1621-1643 (1994).
• [15] M.J. Rosen, Surfactants and interfacial phenomena, John Wiley & Sons, New York 1978.
• [16] A. Rosencwaig, Photoacoustics and photoacoustic spectroscopy, Wiley Interscience Publication, New York 1980.
• [17] J. Szurkowski and S. Wartewig, Application of photoacoustic spectroscopy in visible and in¬frared regions to studies of thin olive oil layers on water, Proc, of “X International Conference on Photoacoustic and Photothermal Phenomena” , 23-28.08.1998, Rome 1998.
• [18] E. Wicke, Strukturbildung und molekulare Beweglichkeit im Wasser und in waflrigen Losungen, Angew. Chem., 78, 1-19 (1966).