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Moisture Sorption Characteristics of Microbially Produced Polysaccharide and Polyvinyl Alcohol Blends |
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| Authors: | S?R?Sudhamani A?Eugene?Raj |
| Institution: | (1) Department of Food Microbiology, Central Food Technological Research Institute, 570 013 Mysore, Karnataka, India;(2) Department of Fermentation Technology and Bioengineering, Central Food Technological Research Institute, 570 013 Mysore, Karnataka, India;(3) Department of Food Packaging Technology, Central Food Technological Research Institute, 570 013 Mysore, Karnataka, India |
| Abstract: | Moisture sorption characteristics of microbial polysaccharide (Ps.C101) from Pseudomonas caryophilli and polyvinyl alcohol (PVA) blends have been carried out at 27°C for water activity from 0.1 to 0.9. The sorption data was used to fit six different sorption isotherm models proposed in literature. The model constants were determined by linear fitting of the sorption equations. The ranges of applicability of water activity for isotherm models reported in this paper lie in between 0.1 and 0.4 for Brunaur–Emmet–Teller (BET) model (monolayer), and in between 0.2 and 0.9 for other models. The value of the coefficient of determination (R2 = 0.97 ± 0.02) confirms the applicability of the equations studied. |
| Keywords: | Biodegradable blend films microbial polysaccharide |
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