A Preliminary Study of Preparing Biodegradable Film from Starch (original) (raw)

In this research the optimum conditions to prepare films from corn and tapioca starch were determined. It was found that the suitable condition for obtaining gelatinized starch solutions was at temperature around 80-85°C and they were then dried at 100°C for 24 hours. Films from both corn and tapioca starch appeared homogeneous and suitable for utilization. To study the effect of glycerol used as a plasticizer on the properties of the film, starch was mixed with different amount of glycerol to obtain different mass ratio of starch to glycerol of 6:4, 7:3 and 8:2, respectively. As a result, for both types of starch, when increasing the amount of glycerol, both tensile strength and water absorbability of the film were decreased while film flexibility and water vapor permeability were increased. When comparing at the same glycerol content, it was found that the film allowing higher flux of water vapor and higher elongation percentage was from corn starch, whereas the film showing highe...

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