Effect of Temperature on Barrier Properties of Soy Protein Isolate Films

Abstract:

The influence of temperature on oxygen and water vapour permeation in cast soy protein isolate (SPI) films was investigated at the range of 10–40° C at 50% relative humidity. At tested temperatures, the SPI films exhibited transmission rate values of 22.48–150.90 g m⁻²day⁻¹ and 5.67–67.48 cm³ m⁻²day⁻¹ for water vapour and O₂, respectively. The results indicated that the relationship between temperature and the oxygen/water vapour transmission rate of the SPI films followed an exponential grow curve [y=A*exp(x/B) + C]. Furthermore, the activation energy (E_a) value of the O₂ permeation process was calculated by fitting the Arrhenius model to the experimental data.

• Periodical: Advanced Materials Research (Volume 380)
• Pages: 270-273
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.380.270
• Online since: November 2011
• Authors: Xiu Feng Ma, Mo Chen, Kai Meng, Fei Fei Li
• Keywords: Barrier Property, Oxygen Transmission Rate, Soy Protein Isolate Films, Water Vapour Transmission Rate

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