Biodegradable plastic production based on cassava starch through a thermomechanical process
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| Autores: | , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2024 |
| Descripción: | 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. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/59540 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/ingenieria/article/view/59540 |
| Palabra clave: | Almidón biodegradable plástico procesamiento termomecánico yuca Biodegradable cassava plastic starch thermomechanical processing |