Summary
The stability of emulsion of Toluene in water stabilized by partially flocculated ferric hydroxide sol has been studied. The size of the emulsion droplets as determined by size frequency analysis is found to be of 1.1 μ radius. The flocculation studies were carried out haemocytometrically at different amount of electrolytes and at different pH values. The electrokinetic potential ‘ζ’ was determined micro-electrophoretically at different amounts of electrolytes and also at different pH's. In the case of tri and tetra valent anions the charge reversal was observed. In the light of the D.V.O. theory the interaction energy profiles were drawn and 2–6 kT deep secondary minima obtained showing thereby the occurrence of reversible flocculation. Degree of aggregation has been calculated theoretically at different values of ‘A’ and the value of A was found to be 1.0×10−12 erg to fit the value of degree of aggregation obtained haemocytometrically. The charge densities and binding parameters have also been calculated.
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References
Pickering, J. Chem. Soc. 91, 2001 (1907).
Bechhold, Dede, and Reiner, Kolloid-Z. 28, 6 (1921).
Bennister, King, and Thomas, J. Soc. Chem. Ind. 59, 226 (1940).
Bhatnagar, J. Chem. Soc. 119, 1760 (1921).
Briggs and Schmidt, J. Phys. Chem. 19, 484 (1915).
Schlaepfer, J. Chem. Soc. 113, 522 (1918); Kolloid-Z. 81, 184 (1937).
Moore, J. Amer. Chem. Soc. 41, 940 (1919).
Briggs, Ind. Eng. Chem. 13, 1008 (1921).
Weston, Chem. Age (London) 4, 604, 638 (1921).
Woodmann, J. Phys. Chem. 34, 299 (1930).
Des Coudres and Hofmann, Z. Physik. Chem. 83, 385 (1913); Arch Entwicklungsmechanik 7, 325 (1898).
Srivastava, S. N. and L. N. Mukherjee, Kolloid-Z. 147, 146 (1956).
Schenkel, J. N. and J. A. Kitchener, Trans. Faraday Soc. 56, 161 (1960).
Verwey, E. G. W. and J. Th. G. Overbeek, Theory of stability of lyophobic colloid (Amsterdam 1948).
Derjaguin, B., Trans Faraday Soc. 36, 203, 730 (1940); Derjaguin, B. and L. D. Landan, Acta Phys. Chim. (URSS) 14, 633 (1941).
Derjaguin, B. and M. Kussakov, Acta Phys. Chim. (URSS) 10, 25, 155 (1939).
Gronwall, T. H., V. K. La Mar, and K. Sandved, Physik Z. 29, 358 (1928).
Wilkins et al., J. Theoret. Biol. 2, 173, 186 (1962); Ottewill et al., Trans. Faraday Soc. 56, 854 (1960).
Hamaker, H. C. cited in: Theory of stability of lyophobic colloid, by E. J. W. Verwey and J. Th. G. Overbeek (Amsterdam 1963); Physica 4, 1058 (1937).
Slater, J. C. and J. G. Kirkwood, Phys. Rev. 37, 682 (1931).
Moelwyn-Hughes, E. A., Physical Chem. p 383 (London 1957).
Rutgers, A. J. and M. De Smet, Trans. Faraday Soc. 41, 758 (1945).
Van den Tempel, M., Thesis (Delft Holland) 1953).
Troelstra, S. A., Thesis (Utrecht 1941).
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Jain, S.P., Srivastava, S.N. Role of partially flocculated sols in emulsion stability. Kolloid-Z.u.Z.Polymere 235, 1230–1238 (1969). https://doi.org/10.1007/BF01542533
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DOI: https://doi.org/10.1007/BF01542533