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Mise au point et caractérisation de films comestibles à base de polysaccharides et de matières grasses :

Abstract : Edible films based on hydroxypropylmethylcellulose (HPMC) plasticized with different concentrations in glycerol and emulsified with diverse hydrophobic substances were prepared. The influence of glycerol concentration and physicochemical properties of lipids on mechanical properties and mass transport were studied. At low relative humidities, glycerol has no significant effect on film water vapor permeability, but improves their oxygen permeability. At high relative humidities, glycerol concentrations increase film's water vapor permeability. Furthermore, plasticized films with 30 % of glycerol have higher oxygen permeability than HPMC films without or with 15 % of glycerol. Lipid addition altered emulsified films mechanical properties and particularly films with paraffin wax. Physical state of the dispersed phase has no significant effect on water vapor and oxygen permeabilities. Interactions between the different components of films explained these results
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Rawaa Al Mahdi. Mise au point et caractérisation de films comestibles à base de polysaccharides et de matières grasses :. Autre. Institut National Polytechnique de Lorraine, 2006. Français. ⟨NNT : 2006INPL011N⟩. ⟨tel-01752494⟩

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