Journal
CARBOHYDRATE POLYMERS
Volume 101, Issue -, Pages 349-358Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.09.072
Keywords
Lepidium perfoliatum seed gum; Biodegradable film; Glycerol; Water vapor permeability; Mechanical properties; Thermal properties
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Microstructural, physical, mechanical and thermal properties of a novel biodegradable film based on Lepidium perfoliatum seed gum (LPSG) were investigated. LPSG films were successfully prepared by incorporation of four levels of glycerol (40%, 50%, 60% and 70%, w/w). As expected, increasing glycerol concentration from 40 to 70% (w/w), increased water vapor permeability (WVP), elongation at break (EB%), moisture content, moisture adsorption and water solubility of LPSG films; whilst, elastic modulus (EM), contact angle, melting point (T-m), enthalpy of melting (Delta H-m) and glass transition point (T-g) decreased significantly. LPSG films became slightly greenish and yellowish in color but still transparent in appearance. The images taken from electron scanning microscopy indicated uniform surface, compact sheets with no holes or fracture. This study demonstrates that LPSG based films with desired properties can be obtained by adjusting glycerol content. (C) 2013 Elsevier Ltd. All rights reserved.
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