Effect of graphene and fabrication technique on the release kinetics of carvacrol from polylactic acid

Porous membranes and thin films containing poly-lactic acid (PLA), carvacrol (CRV) and graphene nanoplatelets (GNP) were fabricated by electrospinning and solvent casting at different formulations. The systems were characterized from a mechanical, morphological, calorimetric and spectroscopic point...

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Bibliographic Details
Published in:Composites science and technology 2019-01, Vol.169, p.60-69
Main Authors: Scaffaro, Roberto, Maio, Andrea, Lopresti, Francesco
Format: Article
Language:English
Subjects:
Casting
Controlled release
Ductility
Electrospinning
Essential oil
Formulations
Graphene
Kinetics
Polylactic acid
Solvent casting
Stiffening
Thin films
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Summary:Porous membranes and thin films containing poly-lactic acid (PLA), carvacrol (CRV) and graphene nanoplatelets (GNP) were fabricated by electrospinning and solvent casting at different formulations. The systems were characterized from a mechanical, morphological, calorimetric and spectroscopic point of view. CRV release as a function of time was studied and a mathematical model was used to fit and interpret the data in order to investigate the release mechanism. The results indicate that the incorporation of GNP generally determined a simultaneous strengthening, stiffening and toughening effect, while preserving a good ductility. Furthermore, integrating GNP allowed tuning the amount and kinetics of CRV release, and proved to reduce the initial burst release effect.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2018.11.003