Biodegradable cassava starch based foams using rice husk waste as macro filler
Among the packages based on petroleum polymers, the use of the expanded polystyrene (EPS) which presents low production costs, low density, high resistance to humidity and dimensional stability, stands out. However, the improper disposal and difculty of recycling them, together with their non-biodeg...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repositorio: | Repositório Institucional da UFRGS |
| Idioma: | inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/221254 |
| Acceso en línea: | http://hdl.handle.net/10183/221254 |
| Access Level: | acceso abierto |
| Palabra clave: | Polímeros biodegradáveis Amido de mandioca Espuma polimérica Engenharia de materiais Foams Cassava starch Rice husk Thermopressing |
| Sumario: | Among the packages based on petroleum polymers, the use of the expanded polystyrene (EPS) which presents low production costs, low density, high resistance to humidity and dimensional stability, stands out. However, the improper disposal and difculty of recycling them, together with their non-biodegradability can result in serious environmental problems. Knowing that there is no way to inhibit the population from using this material, the present study aimed to produce ecofriendly foams based on cassava starch and rice husk (RH). When compared to EPS, materials developed with biopolymers have lower fexibility and higher water sensitivity. The addition of rice husk improved the mechanical properties and reduced density and water capacity absorption in comparison to foams made using only starch. Foams were obtained by a thermopressing process, and the infuence of diferent RH proportions (0, 20, 40, and 60% (w/w)) was investigated. The greater the RH amount, the higher the density and the lower the water absorption capacity (WAC). The maximum tensile stress and tensile strain were negatively infuenced by the addition of 60% (w/w) RH. Diferently from the maximum fexural stress that was positively infuenced. Additionally, sorption isotherms showed that the samples with 40 and 60% RH adsorbed less water when compared to the foam without the fller. The formulation with 60% RH was chosen to storage cherry tomatoes due to its higher maximum fexural stress and lower WAC, being considered a promising material. |
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