Influence of extrusion process conditions on starch film morphology
- González Seligra, Paula Fabiana
- Guz, Lucas Martín
- Ochoa Yepes, Oswaldo Juan
- Goyanes, Silvia Nair
- Fama, Lucia Mercedes
DOIAbstract
The conditions of extrusion process for food packaging are determinant on their morphology and, as consequence, on their functionality. The effect of the screw speed of a starch-glycerol system extruded at the same temperature profile was evaluated. The process at 80 rpm led to a material with the starch completely gelatinized, while the systems fabricated at 40 rpm and 120 rpm presented broken starch grains. The morphology and density of the broken grains depended on the screw speed. The material at 120 rpm showed broken grains with smaller size and lower concentration than that observed in the system at 40 rpm. After pressing at 120 rpm, the film formed (TPS120) resulted similar than that at 80 rpm (TPS80), while the film at 40 rpm (TPS40...
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