Journal
POLYMER INTERNATIONAL
Volume 65, Issue 8, Pages 988-995Publisher
WILEY
DOI: 10.1002/pi.5154
Keywords
cellulose nanofibres (CNF); nanoclay; poly(lactic acid) (PLA); nanocomposites; barrier properties; thermomechanical properties
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Poly(lactic acid) (PLA)-based hybrid nanocomposites (PLA, nanoclay and nanocellulose) were prepared by reinforcing neat PLA with commercially available nanoclay (Cloisite C30B) and nanocellulose, in the form of either partially acetylated cellulose nanofibres (CNFs) or nanocrystalline cellulose. Composites with 1 or 5wt% of nanocellulose, in combination with 1, 3 and 5wt% of nanoclay, were prepared, and their barrier properties were investigated. It was found that the combination of clay and nanocellulose clearly resulted in synergistic behaviour in terms of the oxygen transmission rate (OTR) through a reduction of up to 90% in OTR and a further reduction in the water vapour transmission rate of up to 76%. In addition, the nanocomposite films showed improved thermomechanical resistance and improved crystallisation kinetics while maintaining high film transparency. This makes the hybrid PLA/CNF/C30B nanocomposites a very promising material for food packaging applications. (c) 2016 Society of Chemical Industry
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