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https://hdl.handle.net/1822/69473
Título: | Electroactive γ-phase, enhanced thermal and mechanical behaviour and high ionic conductivity response of poly (vinylidene fluoride)/cellulose nanocrystals hybrid nanocomposites |
Autor(es): | Lizundia, E. Reizabal, A. Costa, Carlos Miguel Silva Maceiras, A. Lanceros-Méndez, S. |
Palavras-chave: | Cellulose nanocrystals Nanocomposites PVDF Electrical properties Mechanical properties |
Data: | 2020 |
Editora: | MDPI |
Revista: | Materials |
Citação: | Lizundia, E.; Reizabal, A.; Costa, C.M.; Maceiras, A.; Lanceros-Méndez, S. Electroactive γ-Phase, Enhanced Thermal and Mechanical Properties and High Ionic Conductivity Response of Poly (Vinylidene Fluoride)/Cellulose Nanocrystal Hybrid Nanocomposites. Materials 2020, 13, 743. https://doi.org/10.3390/ma13030743 |
Resumo(s): | Cellulose nanocrystals (CNCs) were incorporated into poly (vinylidene fluoride) (PVDF) to tailor the mechanical and dielectric properties of this electroactive polymer. PVDF/CNC nanocomposites with concentrations up to 15 wt.% were prepared by solvent-casting followed by quick vacuum drying in order to ensure the formation of the electroactive γ-phase. The changes induced by the presence of CNCs on the morphology of PVDF and its crystalline structure, thermal properties, mechanical performance and dielectric behavior are explored. The results suggest a relevant role of the CNC surface −OH groups, which interact with PVDF fluorine atoms. The real dielectric constant ε’ of nanocomposites at 200 Hz was found to increase by 3.6 times up to 47 for the 15 wt.% CNC nanocomposite due to an enhanced ionic conductivity provided by CNCs. The approach reported here in order to boost the formation of the γ-phase of PVDF upon the incorporation of CNCs serves to further develop cellulose-based multifunctional materials |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/69473 |
DOI: | 10.3390/ma13030743 |
ISSN: | 1996-1944 |
Versão da editora: | https://www.mdpi.com/1996-1944/13/3/743 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
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