Polyhydroxybutyrate-Based Nanocomposites with Cellulose Nanocrystals and Bacterial Cellulose

IRENE SEOANE; PATRICIA CERRUTTI; ANALÍA VAZQUEZ; LILIANA MANFREDI; VIVIANA CYRAS

JOURNAL OF POLYMERS AND THE ENVIRONMENT

SPRINGER/PLENUM PUBLISHERS

Lugar: New York; Año: 2017 vol. 25 p. 586 - 598

1566-2543

Polyhydroxybutyrate (PHB) films nanoreinforcedwith hydrolyzed cellulose nanocrystals (CNC) andbacterial cellulose (BC) were prepared by solvent casting.The influence of different cellulose nanoparticles content(2, 4 and 6 wt% of CNC and 2 wt% of BC) on the PHBproperties was studied. CNC nanocomposites presentedgood dispersion of the nanocrystals, improving transparency,mechanical and barrier properties of the PHBfilms. On the other hand, reduced thermal stability andmechanical properties were yielded by BC addition due tothe intrinsic lower degradation temperature and higherlength of the BC nanofibrils compared to CNC.Nanocomposites performance variation is mainly causedby the marked difference in nanoparticles structure. It wasdemonstrated that PHB?CNC films exhibited higher performanceenhancement without detrimental effect of thepristine PHB properties.