Abstract
Photon correlation spectroscopy was used to measure the hydrodynamic thickness of gelatin films adsorbed onto latex particles. When prepared in solutions of distilled water acid ossein gelatins showed less dimensional variation over the pH range than limed ossein samples. This difference was not apparent on the introduction of complex ions from a barbitone-acetate buffer. In both systems the average thickness of the film was 30 nm and results suggested that the greatest dimensional contribution was from the loops. Static attraction between the chains leading to multilayer formation, may have been responsible for the greater film thickness measured at alkaline pH values.
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