Influence of thickness on properties of plasticized oat starch films

Brazilian Archives of Biology and Technology

Melicia Cintia Galdeano²  Allan Eduardo Wilhelm²  Suzana Mali¹  Maria Victória Eiras Grossmann¹ 

[1] ,Embrapa Agroindústria de AlimentosRio de Janeiro RJ ,Brasil

关键词: Plasticizers;    Tensile;    Puncture;    Permeability;    Opacity;    Glycerol;   

DOI  :  10.1590/S1516-89132013000400014

来源: SciELO

【 摘 要 】

The aim of this study was to investigate the effect of thickness (between 80 and 120 µm) on apparent opacity, water vapor permeability and mechanical properties (tensile and puncture) of oat starch films plasticized with glycerol, sorbitol, glycerol:sorbitol mixture, urea and sucrose. Films were stored under 11, 57, 76 and 90% relative humidity (RH) to study the mechanical properties. It was observed that the higher the thickness, the higher was the opacity values. Films without the plasticizer were more opaque in comparison with the plasticized ones. Glycerol:sorbitol films presented increased elongation with increasing thickness at all RH. Puncture force showed a strong dependence on the film thickness, except for the films plasticized with sucrose. In general, thickness did not affect the water permeability.

【 授权许可】

CC BY-NC   
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