Effects of silylated starch structure on hydrophobization and mechanical properties of thermoplastic starch foams made from potato starch
Non-biodegradable single use packaging are a serious environmental problem as it generates large amounts of waste and is generally not recycled. These packages, especially those made of expanded polystyrene, can be replaced by thermoplastic starch foams. These foams have the advantage of being from...
| 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:10183/219759 |
| Acceso en línea: | http://hdl.handle.net/10183/219759 |
| Access Level: | acceso abierto |
| Palabra clave: | Espumas Amido termoplástico Silano Propriedades mecânicas dos materiais TPS foam 3-chloropropyl trimethoxysilane Methyltrimethoxysilane Silylated starch |
| Sumario: | Non-biodegradable single use packaging are a serious environmental problem as it generates large amounts of waste and is generally not recycled. These packages, especially those made of expanded polystyrene, can be replaced by thermoplastic starch foams. These foams have the advantage of being from renewable sources and biodegradable. However, this material is hydrophilic and becomes unusable when it is exposed to water. Hydrophobizing starch comes as an alternative to make the foams more resistant to contact with water. The purpose of the modification is to exchange starch hydroxyl groups for less polar groups such as silane groups. In this work, two silanes were used for starch silylation: 3-chloropropyl trimethoxysilane and Methyltrimethoxysilane. The foams were made using four materials: modified starch, gelatinized starch, polyvinyl alcohol and water. Results from water absorption tests and mechanical tests show that foams absorb less water and become more resistant with the addition of silylated starch. |
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