Moisture sorption characteristic of soy protein isolate/carboxymethyl cellulose blended film

• Main Authors: Rachtanapun,P., Suriyatem,R.
• Format: Article
• Published: Chiriotti Editori 2015
• Subjects: Food Science
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84896505054&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/39213
• Institution: Chiang Mai University

Soy protein isolate/carboxymethyl cellulose (SPI/CMC) blended films were prepared. The effect of ratios between SPI and CMC were used in a film forming solution on water vapor permeability (WVP) and a moisture sorption characteristic of SPI/CMC blended films was evaluated. When the CMC portion incresed, WVP of the blended films trended to increased. The sorption isotherm of each blended film provided the characteristic of sigmoid-shaped type II isotherm. The isotherms showed that the EMC of the films was concurrent with the water vapor permeability finding. The GAB, BET, Lewicki and Oswin models were tested to fit the experimental data. The Lewicki model was found to be the best fit model for SPI/CMC blended films with the lowest range of percent root mean square (12.2-66.1) at aw as 0.11-0.75, at 25±2°C.