Kinetics of Swelling Applied on Gelatine

Abstract: This report is about the measurements of swelling gelatine films of different thickness and at different temperature. The research has been mainly focused on finding a suitable model. Results have shown that the new Pseudo-Sigmoidal Model (PSM) is superior to previous quasi-second order models such as the Robinson and Ofner model. It has also been shown that gelatine’s swelling can be divided into three different states: amorphous, intermediate and crystalline, and they can be described via a simple model. Gelatine film does not swell beyond the initial amorphous state when it is above the glass temperature. Calculations have shown that the long dismissed Hofmeister model is identical to the current Ofner model.