Abstract:
The present work is based in a study starting from
the behavior and characterization of films made from a 2% total
solids (TS) dispersion of easy accessibility raw materials such as,
cassava starch (Y), potato (P) and rice (A), combined with a protein
i.e. gelatin (G) in a 50:50 ratio; adding guaiacum wood fiber of 75
and 150 µm (Ff and Fg respectively) until 1% (TS). Furthermore,
glycerol was incorporated as plasticizer until 30% TS. The
biodegradable films were elaborated by casting method. The films
were characterized on the following parameters: thickness, water
permeability and mechanical properties (Young modulus, tensile
stress and elongation). It was found that the films made of AG-Ff
and PG-Ff shown better barrier to the water vapor permeability
with values of 2.5 and 2.4 (g. mm. KPa-1. h-1.m2
) respectively. The PG-Ff film showed, also, better mechanical properties i.e. higher
Force, Young modulus and tensile stress increasing with time, with
the lower elasticity; the YG-Ff and YG-Fg films reported the higher
elasticity, being this parameter of interest, we will continue with
this formulae to other manufacturing processes.
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