PLA-PHB/cellulose based films: Mechanical, barrier and disintegration properties

By M. Arrieta, E. Fortunati, F. Dominici, E. Rayón, Juan Carlos Cortés López, J. Kenny. 2014

288 citations recorded by the source corpus.

Nanocomposite films based on poly(lactic acid)-poly(hydroxybutyrate) (PLA-PHB) blends and synthesized cellulose nanocrystals (CNC) or surfactant modified cellulose nanocrystals (CNCs), as bio-based reinforcement, were prepared by melt extrusion followed by film forming. The obtained nanocomposites are intended for short-term food packaging. Thus, the mechanical, optical, barrier and wettability properties were studied. Functionalized CNCs contribute to enhance the interfacial adhesion between PLA and PHB, leading to improved mechanical stiffness and increased film stretchability. The synergic effects of the PHB and CNCs on the PLA barrier properties were confirmed by increases in oxygen barrier properties and reductions in surface wettability of the nanocomposites. In addition, the measurements of the viscosity molecular weight for ternary systems showed practically no degradation of PLA and smaller degradation of PHB during processing due to nanocrystal presence. The disintegration process in composting conditions of PLA was delayed by the addition of PHB, while CNC speeded it up. PLA-PHB-CNCs formulations showed enhanced mechanical performance, improved water resistance, reduced oxygen and UV-light transmission, as well as appropriate disintegration in compost suggesting possible applications as packaging materials.

Subfields: Biomaterials

View Paper: https://www.semanticscholar.org/paper/42d37afce7aa7459be0469d19cc47a2e04d6885e

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In Biomaterials

1. J. Kenny
2. E. Fortunati
3. N. Burgos
4. F. Dominici
5. A. Jiménez
6. S. M. Tasirin
7. F. Esa
8. Sandeep S. Nair

Citations in the corpus

• Review of Multifarious Applications of Poly (Lactic Acid) (2016, background): “showed improved water resistance and reduced oxygen and UV light transmission([170]).”
• Overview of Bacterial Cellulose Production and Application (2014, background): “BC has been identified as one of the suitable material (Tang et al., 2012) as it consist of fine network, biodegradable (Sonia and Dasan, 2013), and high water resistance performance (Arrieta et al., 2014).”
• Processing and characterization of plasticized PLA/PHB blends for biodegradable multiphase systems (2015, background): “taneously, the food packaging industry requires the development of simple formulations produced by easy, readily available and cost effective processing technologies such as melt blending approaches [1].”
• Advances in barrier coatings and film technologies for achieving sustainable packaging of food products – A review (2021, background): “Several academic and industrial developments have been focused on improving gas and moisture vapor barrier properties of cellulose acetate (Aldana et al., 2014; Arrieta et al., 2014b; Bras et al., 2007; Dellinger & Helou, 2015).”
• High performance green barriers based on nanocellulose (2014, background): “Water contact angle measurements showed that the ternary system had high hydrophobicity and the presence of sulphate groups with low polarity on the surface of CNCs increased the surface hydrophobicity of the final composite material [55].”
• Synergic effect of cellulose and lignin nanostructures in PLA based systems for food antibacterial packaging (2016, unknown): “The good transparency of PLA/3CNC films has been related with the good dispersion of CNC into PLA matrix [42].”