Abstract
Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)/Purified Cellulose Fiber Composites by Melt Blending: Characterization and Degradation in Composting Conditions
Highlights
Plastic packaging residues are one of the most serious problems in the management of municipal solid waste since they are mostly resistant to microbial degradation and remain semipermanently in landfills, with the environmental impact that this implies [1, 2]
Morphological characterization of the cellulose fibers as received and within the composites used in this work was performed with scanning electron microscopy (SEM) (Figure 1)
The addition of high contents of cellulose fibers, slightly decreases the onset degradation temperature and the maximum degradation temperature of the composites. This behavior is attributed to interactions between cellulose and PHBV, similar to those reported by Petinakis et al for Poly(lactic acid) (PLA) starch systems [43]
Summary
Plastic packaging residues are one of the most serious problems in the management of municipal solid waste since they are mostly resistant to microbial degradation and remain semipermanently in landfills, with the environmental impact that this implies [1, 2]. It is well known that the dispersion of fibrillated microparticles or nanoparticles in a polymeric matrix improves the mechanical properties; the addition of cheaper loading in high proportions allows reduction in the product’s final cost In this context, the effect of the addition of inorganic fibers to biopolyester matrices on its mechanical, thermic and barrier properties has been widely studied [14, 15]. The purpose of this work is to obtain “green,” low-cost composites from commercial PHBV and purified cellulose fibers using the melt blending technique These composites must contain the highest possible amount of cellulose, increasing mechanical performance ( at high temperatures), while retaining their processability and thermal properties, and must be degradable under standard lab-scale composting conditions (ISO 20200 standard)
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