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Properties and sorption studies of polyethylene oxide-starch blended films.

Jagadish, R. S. and Baldev, Raj (2011) Properties and sorption studies of polyethylene oxide-starch blended films. Food Hydrocolloids, 25. pp. 1572-1580. ISSN 0268-005X

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A series of polyethylene oxide (PEO) and starch blends were prepared by extrusion and their films prepared by compression molding. The mechanical, barrier, optical, thermal properties and surface morphology characteristics of PEOestarch blended films were studied. The tensile strength of the blended films decreased whereas the haze values increased with an enhanced starch concentration in PEOestarch blends. The inter-molecular interaction between PEOestarch blends were investigated with FTIR. The thermal properties were also analyzed by differential scanning calorimetric (DSC) and thermogravimetric analysis (TGA) techniques. Moisture-sorption characteristics of PEOestarch blended films were carried out at 27 �C for water activity (aw) ranged from 0.1 to 0.9. The sorption data at different aw were used to fit different sorption isotherm models as proposed in the literatures. The model constants were determined by linear fitting of the sorption equations. The high coefficient of determination R2 (ranged from 0.7 to 1) confirms the applicability of the equations employed. The study on the application of such water activity data of PEO/starch blended films on different model equations will be helpful in prediction of durability and functional behavior of moisture sensitive biopolymeric films.

Item Type: Article
Uncontrolled Keywords: PEO, Starch blends, FTIR, DSC, Sorption isotherms
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 27 Polymer Chemistry
Divisions: Food Packaging Technology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 10 Feb 2012 10:46
Last Modified: 25 Sep 2018 10:54
URI: http://ir.cftri.com/id/eprint/10602

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