Prediction Modeling for Moisture Sorption Isotherms of Rice Starch/Carboxymethyl Cellulose from Durian Rind Blend Films

Abstract:

Rice starch/carboxymethyl cellulose from durian rind (RS/CMCd) blend films were prepared by solution casting. The effect of different ratios between rice starch and CMCd (100:0, 88:12, 67:33, 50:50, 33:67, 12:88 and 0:100) on moisture sorption isotherm of blend films was investigated. The sorption isotherm of RS/CMCd blend films was determined at various relative humidity (RH) at 25°C. The isotherm curves revealed that the highest equilibrium moisture content (EMC) was obtained from CMCd film, at a_w=85. Knowledge of sorption isotherms is important to predict the moisture sorption properties of the films via moisture sorption empirical models. The Lewicki, Peleg, Guggenheim-Anderson-deBoer (GAB), BrunauerEmmettTeller (BET), and Oswin models were tested to fit the experimental data. The root mean squares percentage error (%RMS) of Lewicki, Peleg, GAB, BET and Oswin was in the range of 5.3-83.1, 2.2-20.0, 6.9-20.2, 3.4-26.4 and 4.7-41.2, respectively. The Peleg model was found to be the best fitted model for RS/CMCd blend films.

• Periodical: Applied Mechanics and Materials (Volume 431)
• Pages: 32-36
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.431.32
• Online since: October 2013
• Authors: Rungsiri Suriyatem*, Pornchai Rachtanapun
• Keywords: Blend Film, Carboxymethyl Cellulose, Durian Rind, Rice Starch, Sorption Model

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