Fabrication of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) biocomposites with reinforcement by hydroxyapatite using extrusion processing

The aim of this study was to prepare poly(3-hydroxybutyrate-co-3-hydroxyvalerate), PHBV, biocomposites with incorporating various percentages of hydroxyapatite (HAP) using extrusion processing. The biocomposites were produced by melt extrusion of PHBV with untreated HAP and surface-treated HAP cryst...

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Bibliographic Details
Published in:Materials Science & Engineering C 2016-08, Vol.65, p.19-26
Main Authors: Oener, Mualla, Ilhan, Berna
Format: Article
Language:English
Subjects:
Biocompatible Materials - chemistry
Bionanocomposite
Calorimetry, Differential Scanning
Correlation
Durapatite - chemistry
Elastic Modulus
Extrusion
Hydroxyapatite
Materials science
Mechanical properties
Microscopy, Electron, Scanning
Nanocomposites - chemistry
Nanostructure
Particulate composites
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
Polyesters - chemistry
Reinforcement
Spectroscopy, Fourier Transform Infrared
Surface Properties
Thermal properties
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Summary:The aim of this study was to prepare poly(3-hydroxybutyrate-co-3-hydroxyvalerate), PHBV, biocomposites with incorporating various percentages of hydroxyapatite (HAP) using extrusion processing. The biocomposites were produced by melt extrusion of PHBV with untreated HAP and surface-treated HAP crystals. The structure of biopolymer/HAP biocomposites was investigated by XRD, FTIR, DSC and SEM. Silane coupling agent was used for HAP surface treatment in PHBV/HAP composites. Silane-treated HAP nanoparticles yielded nanocomposites characterized by good mechanical performance and fine nanofiller dispersion, as shown by SEM investigations. The Halpin–Tsai and Hui-Shia models were used to evaluate the effect of reinforcement by HAP particles on the elastic modulus of the composites. Micromechanical models for initial composite stiffness showed good correlation with experimental values. Disparities in the Halpin–Tsai model were evident for composite with higher HAP loadings. •PHBV/HAP biocomposites were produced by using melt processing.•HAP modified by silane coupling agent could improve mechanical properties of composites.•The tensile strength and Young modulus values were found to be improved and reached a maximum at with 5wt% HAP loading.•These results were found to fit the Halpin Tsai and Hui-Shia model.
ISSN:0928-4931
1873-0191
DOI:10.1016/j.msec.2016.04.024