Effect of Babassu Natural Filler on PBAT/PHB Biodegradable Blends: An Investigation of Thermal, Mechanical, and Morphological Behavior

Materials
Vinicius C BeberRenate M R Wellen

Abstract

Blending of biodegradable polymers in combination with low-price organic fillers has proven to be a suitable approach to produce cost-effective composites in order to address pollution issues and develop products with superior mechanical properties. In the present research work PBAT/PHB/Babassu composites with 25, 50, and 75% of each polymer and 20% of Babassu were produced by melting extrusion. Their thermal, mechanical, and morphological behavior was investigated by differential scanning calorimetry (DSC), tensile testing, and scanning electron microscopy (SEM). Blending PBAT with PHB inhibited the crystallization of both polymers whereas adding Babassu did not significantly change their melting behaviour. Incorporation of Babassu reduced the tensile strength of its respective blends between 4.8 and 32.3%, and elongation at break between 26.0 and 66.3%. PBAT as highly ductile and low crystalline polymer may be seen as a crystallization tool control for PHB as well as a plasticizer to PBAT/PHB blends and PBAT/PHB/Babassu composites. As PBAT content increases: (i) elongation at break increases and (ii) surface fracture becomes more refined indicating the presence of more energy dissipation mechanisms. As PBAT/PHB/Babassu compos...Continue Reading

References

Mar 19, 2013·Materials Science & Engineering. C, Materials for Biological Applications·Jung Seop LimJong Hoon Kim
Aug 1, 2012·Materials Science & Engineering. C, Materials for Biological Applications·Kikku FukushimaMing-Chien Yang
Sep 7, 2018·Materials Science & Engineering. C, Materials for Biological Applications·Jayven Chee Chuan YeoChaobin He

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Citations

Nov 1, 2020·International Journal of Biological Macromolecules·Salma ShahidZill-I-Huma Nazli
Apr 4, 2021·Materials·Ignazio Blanco, Valentina Siracusa
Jul 8, 2020··Georgina K. F. SerresSamuel M. A. Morais

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Methods Mentioned

BETA
PBAT
Differential Scanning Calorimetry
scanning electron microscopy

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