Electrical, morphology and structural properties of biodegradable nanocomposite polyvinyl-acetate/ cellulose nanocrystals

In this work, the dielectric properties and the electrical conductivity of polyvinyl acetate (PVAc) polymer doped with cellulose nanocrystals (CNC), extracted from the date palm rachis, are reported. We investigate the filler effect on the molecular mobility of the PVAc polymer chains and the charge...

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Bibliographic Details
Published in:Materials chemistry and physics 2020-01, Vol.240, p.122182, Article 122182
Main Authors: Hammami, I., Benhamou, K., Hammami, H., SoretoTeixeira, S., Arous, M., Kaddami, H., Graça, M.P.F., Costa, L.C.
Format: Article
Language:English
Subjects:
Biodegradability
Cellulose
Cellulose acetate
Charge transport
Dielectric properties
Electrical resistivity
Frequency ranges
Morphology
Nanocomposites
Nanocrystals
Polyvinyl acetate
Polyvinyl acetates
Transport properties
X ray powder diffraction
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Summary:In this work, the dielectric properties and the electrical conductivity of polyvinyl acetate (PVAc) polymer doped with cellulose nanocrystals (CNC), extracted from the date palm rachis, are reported. We investigate the filler effect on the molecular mobility of the PVAc polymer chains and the charge transport properties of this material. PVAc/CNC films structure was characterized by powder X-Ray diffraction (XRD), showing the crystalline behavior of the cellulose filler. The dielectric properties were investigated using impedance spectroscopy, in the frequency range of 102–106 Hz and temperatures from 200 to 350 K. A β relaxation, assigned to the motions of the -OCOCH3 side groups, and α relaxation, associated with the glass transition of the PVAc matrix, can be detected. [Display omitted] •Polyvinyl-acetate/cellulose nanocrystals nanocomposites are investigated.•The fragility parameters and activated energy for different process are evaluated.•Electrical conductivity are investigated using DC measurements .•High activation energy values prove that the conductivity is of an ionic nature.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2019.122182