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Título: | Binary PVA bio-nanocomposites containing cellulose nanocrystals extracted from different natural sources: Part I |
Autor: | Fortunati, Elena; Puglia, D.; Luzi, F.; Santulli, C.; Kenny, José María CSIC ORCID; Torre, L. | Palabras clave: | Natural fibres Cellulose nanocrystals Bio-nanocomposites Poly(vinyl alcohol) (PVA) Mechanical properties Water absorption capacity |
Fecha de publicación: | 2013 | Editor: | Elsevier | Citación: | Carbohydrate Polymers 97: 825- 836 (2013) | Resumen: | PVA bio-nanocomposites reinforced with cellulose nanocrystals (CNC) extracted from commercial microcrystalline cellulose (MCC) and from two types of natural fibres, Phormium tenax and Flax of the Belinka variety, were produced by solvent casting in water. Morphological, thermal, mechanical and transparency properties were studied while the respective efficiency of the extraction process of CNC from the three sources was evaluated. The effect of CNC types and content on PVA properties and water absorption capacity were also evaluated. Natural fibres offered higher levels of extraction efficiency when compared with MCC hydrolysis yield. Thermal analysis proved that CNC promotes the crystallization of the PVA matrix, while improving its plastic response. It was also clarified that all PVA/CNC systems remain transparent due to CNC dispersion at the nanoscale, while being all saturated after the first 18-24 h of water absorption. © 2013 Elsevier Inc. | URI: | http://hdl.handle.net/10261/99440 | DOI: | 10.1016/j.carbpol.2013.03.075 | Identificadores: | doi: 10.1016/j.carbpol.2013.03.075 issn: 0144-8617 e-issn: 1879-1344 |
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