Poly(lactic acid) (PLA) is a very attractive polymer for food packaging application. In this work we tried to develop a smart PLA film, especially to improve its potential food applications providing antibacterial properties by means of functionalization of the film surface with cardanol-based vesicle nanodispersion obtained by an environmental-friendly process. We used cardanol-based nanovesicles loaded with porphyrin molecules itself cardanol functionalized, in order to prepare a composite material that can act as potential 'smart film' as acid indicator: The film changes its colour according to the acid atmosphere it reveals thanks to the conformational change of porphyrin. Starting from commercial PLA pellets, films were extruded and cardanol-based nanovescicles embedded with porphyrin were deposited on these PLA films by simple casting of the aqueous vescicular nanodispersion. The functionalized PLA films were then studied by mechanical testing. SEM-FEG characterization, and UV-visible measurements were performed to investigate the presence of cardanol-based nanodispersion on the film and the acid response of porphyrin. © 2015 IEEE.

Smart Poly(lactic acid)-functionalized films with cardanol-based nanovesicles obtained from renewable resources for food packaging application

Capodieci, L.;Marciano, T.;Terzi, R.;Cosentino, F.;Massaro, C.
2018

Abstract

Poly(lactic acid) (PLA) is a very attractive polymer for food packaging application. In this work we tried to develop a smart PLA film, especially to improve its potential food applications providing antibacterial properties by means of functionalization of the film surface with cardanol-based vesicle nanodispersion obtained by an environmental-friendly process. We used cardanol-based nanovesicles loaded with porphyrin molecules itself cardanol functionalized, in order to prepare a composite material that can act as potential 'smart film' as acid indicator: The film changes its colour according to the acid atmosphere it reveals thanks to the conformational change of porphyrin. Starting from commercial PLA pellets, films were extruded and cardanol-based nanovescicles embedded with porphyrin were deposited on these PLA films by simple casting of the aqueous vescicular nanodispersion. The functionalized PLA films were then studied by mechanical testing. SEM-FEG characterization, and UV-visible measurements were performed to investigate the presence of cardanol-based nanodispersion on the film and the acid response of porphyrin. © 2015 IEEE.
9781509051519
poly(lactic acid) (PLA);green nanovesicles;cardanol;porphyrin;biopolymers;food packaging;mechanical properties
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12079/5868
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