Akademik Veri Yönetim Sistemi
BULGARIAN CHEMICAL COMMUNICATIONS, cilt.56, sa.3, ss.314-320, 2024 (Scopus)
Polyhydroxyalkanoates are naturally occurring, non-toxic aliphatic polyesters. Nanocomposite fabrication is an effective and cost-efficient approach to modulate polymer properties. Within the scope of this study, poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3HB4HB)/poly(3-hydroxybutyrate) (P3HB) (PHAs) bioblends were developed by using solution casting and extrusion methods. The optimum compositions of PHAs bioblends were determined as 80% P3HB4HB for solution casting method and 60% P3HB4HB for extrusion method. To obtain PHAs-based bionanocomposites, two types of copper-based metal organic frameworks (CuMOF and GO@CuMOF) nanocrystals (0.5; 1.0 wt% and 0.1; 0.5 wt%), and bentonite, sepiolite, high-purity sepiolite (1; 2; 3 wt%) nanoclays were added to the PHAs bioblend matrix. The effects of nanofillers on mechanical and optical properties, barrier performance and thermal behavior of bionanocomposites were investigated. When the mechanical properties of bionanocomposites obtained by the solution casting method were examined according to the polyethylene reference, the optimum ratio of all nanoclays was 3% while the optimum ratios of CuMOF nanocrystals were 1 and 0.1, respectively. PHAs/HPS-3 bionanocomposite films showed a 62.5% improvement in oxygen transmittance rate (OTR) compared to the flexible polyethylene reference. Material properties were recognized through solution casting studies, and it was determined that bionanocomposites have gained good qualities for flexible packaging with the use of CuMOF and high-purity sepiolite (HPS) nanofillers.