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Sopade, Peter
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document
Moisture uptake and tensile properties of starch-sugar cane fibre films
Abstract
THERE is an increasing need for biodegradable plastics because they are environmentally friendly and can replace petroleum-based non-degradable plastics which pollute the environment.Starch-derived films reinforced with sugar cane bagasse fibre, which are biodegradable, have been prepared and characterised by gravimetric analysis for moisture uptake, X-ray powder diffraction for crystallinity, and tensile testing for mechanical properties.Results have shown that the addition of bagasse fibre (5 wt%,10 wt% or 20 wt%) to either (modified) potato starch (Soluble starch) or hydroxypropylated maize starch reduced moisture uptake by up to 30% at 58% relative humidity (RH).Also, the tensile strength and the Young’s Modulus increased up to 63% and 80% respectively, with the maximum value obtained with5 wt% fibre at 58% RH.However, the tensile strain of the films significantly decreased by up to 84%.The results have been explained based on the crystallinity of the films and the intrinsic properties of starch and bagasse fibres.