Ingeniería ISSN Impreso: 1409-2441 ISSN electrónico: 2215-2652

OAI: https://revistas.ucr.ac.cr/index.php/ingenieria/oai
Biodegradable plastic production based on cassava starch through a thermomechanical process
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Keywords

Almidón
biodegradable
plástico
procesamiento termomecánico
yuca
Biodegradable
cassava
plastic
starch
thermomechanical processing

How to Cite

Jiménez Villalta, G. A., Miranda Morales, B., & Moya Alvarado, G. (2024). Biodegradable plastic production based on cassava starch through a thermomechanical process. Ingeniería, 35(1), 1–10. https://doi.org/10.15517/ri.v35i1.59540

Abstract

The present research aims to formulate a thermoplastic polymer based on starch (TPS) extracted from a cassava variety, through a thermomechanical processing in an internal mixer. Three formulations, guided by preliminary tests, were analyzed to choose a base formulation. Polyvinyl alcohol (PVOH) was chosen to reinforce TPS. Likewise, a statistical study of the processing conditions was carried out, from which the temperature was optimized at 110 °C, the rotor speed at 75 rpm (1,25 Hz), and the processing time at 6 min. Finally, through adjustment of the relative percentages of the components, a material with a tensile stress of 15,4 ± 0,9 MPa and a strain deformation of 44 ± 11 % was achieved. An aging test showed that properties of the TPS materials reached stabilization after 15 days of their formation. In the same way, a biodegradability test showed a reduction in the plastic mass of 98,5 ± 0,3 % after 22 days of being buried. Under controlled conditions, the material exhibits adequate mechanical properties for use in everyday applications; however, it is necessary to address its sensitivity to ambient humidity, as this significantly influences these mechanical properties.

https://doi.org/10.15517/ri.v35i1.59540
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Copyright (c) 2024 Guillermo Alfonso Jiménez Villalta, Barbara Miranda Morales, Guillermo Moya Alvarado

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