THE EFFECT OF SODIUM DODECYL-SULFATE ON THE PROPERTIES OF INTERFACIALADSORBED GELATIN LAYERS AND GELATIN-STABILIZED EMULSION FILMS

Rheological parameters (stress of steady-state flow, viscosity) of the interfacial adsorbed layers of gelatin and its complexes with sodium dodecyl sulfate were measured at the aqueous solution-decane interface . Interfacial tension in the presence of the interfacial adsorbed laye rs of various composition and their thicknesses were also determined. Viscosity and stability of emulsion films stabilized by gelatin-sodium dodecyl sulfate complexes were measured. Stable emulsion films were s hown to be formed during their stabilization with the gelatin-sodium d odecyl sulfate complexes of definite composition containing from 7.7 x 10(-5) to 9.5 x 10(-3) g SDS/g gelatin. It was shown that interfacial adsorbed layers formed by these complexes have a smaller thickness an d increased strength as compared with those formed by gelatin macromol ecules.