Morphology and properties of neutralized chitosan-cellulosenanocrystals biocomposite films
Chitosan/cellulose nanocrystals (CH-CN) films were obtained by casting of dispersions, and treated withNaOH for neutralization proposes. The composition of films was varied from 1 to 10 wt.% of CN. Changesin the morphology of the systems were correlated with the different properties studied. FTIR re...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/103532 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/103532 |
| Access Level: | acceso abierto |
| Palabra clave: | Química Chitosan Cellulose nanocrystals Bionanocomposites |
| Sumario: | Chitosan/cellulose nanocrystals (CH-CN) films were obtained by casting of dispersions, and treated withNaOH for neutralization proposes. The composition of films was varied from 1 to 10 wt.% of CN. Changesin the morphology of the systems were correlated with the different properties studied. FTIR revealedthe presence of a weak interaction between the polymer matrix and nanofiller, confirmed by a slightlyincrease in thermal stability. SEM images suggested that incorporating CN amounts higher than 3 wt.%generates phase-segregated systems, and SAXS showed that CH avoid the typical organization of CN atconcentrations below 5 wt.%. Improved performance against water was obtained in composite materialscomparing to the pure polymer matrix, as well as CH and CH-CN films did not show antibacterial activitydemonstrating that remnant acetic acid, when no neutralization step is done, plays an important role inthis property. |
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