Muiruri, J. K., Yeo, J. C. C., Run, H., Lin, T. T., Hou, X., Raveenkumar, V., Jian, B. Y., Thitsartarn, W., He, C., & Li, Z. (2024). Plant oil fillers toughened poly(3-hydroxybutyrate) green biocomposites. European Polymer Journal, 210, 112926. https://doi.org/10.1016/j.eurpolymj.2024.112926
Abstract:
Poly(3-hydroxybutyrate) (PHB) faces a significant challenge of intrinsic brittleness, thus limiting its widespread applicability. This challenge can be surmounted by incorporating various nanofillers into the PHB matrix to tune the mechanical performance. However, many of these fillers are produced using unsustainable, non-environmentally friendly methods. Herein, we employed a green process to develop castor-oil-based fillers, CO-g-DLA, and CO-P(CL-co-DLA)-PDLA (CO-r-DLA), for the toughening of the PHB matrix. Impressively, the addition of 20% of these fillers increases the elongation at the break by 13-fold through forming elongated fibril structures and enhanced interfacial interactions between fillers and the matrix, accompanying by a substantial reduction on the PHB’s brittleness through shear yielding and fibrillation. These are confirmed by Small-Angle X-ray Scattering (SAXS) results, showing significant copolymer-induced microstructural changes in the matrix. The biodegradable PHB biocomposite developed in this study offers a promising green alternative to conventional plastics, especially in sustainable packaging.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the A*STAR - RIE2025 Manufacturing, Trade and Connectivity (MTC) Programmatic Fund
Grant Reference no. : M22K9b0049
This research / project is supported by the A*STAR - AME Young Individual Research Grants (YIRG)
Grant Reference no. : A2084c0168
This research / project is supported by the A*STAR - GAP Grant
Grant Reference no. : I22D1AG014