“Optimization of the Dehydration Process of Soy Protein Films”.

DENAVI, GABRIELA,; TAPIA BLACIDO, DELIA,; MAURI, ADRIANA,; SOBRAL, PAULO,; AÑÓN, M. CRISTINA; MENEGALLI, FLORENCIA.

Budapest, Hungría

Congreso; 15th International Drying Symposium - IDS 2006; 2006

The influence of drying conditions (relative humidity and air temperature) on the mechanical properties, the colour and solubility of soy protein isolate films was studied using a full factorial design (22 plus star configuration). The optimal conditions of drying were 60ºC and 60% of RH. For these conditions, films were toughest and showed a low solubility while their barrier properties were similar to other protein films. SEM and TEM micrographs showed a dense and homogenous structure and DSC thermograms presented a Tg at –81.78ºC and two peaks of protein denaturation, showing that this phenomenon was not completed during drying.