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Preparation, characterization, and performance of bio-based polyester composites derived from renewable distillers grains and shellfish

Although biocomposites typically display poor performance, this deficiency can be mitigated by incorporating suitable bio-fillers with the base biopolymer. The main objective of this study was to assess the effectiveness of distillers grains and Paphia undulata shell mixture when used as fillers to...

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Bibliographic Details
Published in:Journal of polymer research 2021, Vol.28 (4), Article 114
Main Authors: Wu, Chin-San, Wu, Dung-Yi, Wang, Shan-Shue
Format: Article
Language:English
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Summary:Although biocomposites typically display poor performance, this deficiency can be mitigated by incorporating suitable bio-fillers with the base biopolymer. The main objective of this study was to assess the effectiveness of distillers grains and Paphia undulata shell mixture when used as fillers to improve the functional performance of polylactic acid (PLA). The MPLA/TTDGP (modified polylactic acid, MPLA; coupling agent-treated distillers grains powder, TDGP; and P. undulata shell powder heat-treated at 900 °C, TPUSP) and PLA/DGP (polylactic acid/distillers grains powder) composites were prepared via a melting and mixing process, and then their structural, thermal, mechanical and anti-oxidant properties, as well as their biocompatibility and biodegradability, were characterised. Compared with MPLA and PLA, the tensile properties were obviously enhanced in the MPLA/TTDGP and PLA/DGP composites. The tensile strength at failure ( δ ) and Young's modulus ( E ) of MPLA/TTDGP were approximately 5–37 and 50–1,200 MPa higher, respectively, than those of PLA/DGP, due to better interfacial adhesion. The water resistance values of the MPLA/TTDGP and PLA/DGP composites were also increased compared with MPLA and PLA. The water resistance was greater in the MPLA/TTDGP composite than the PLA/DGP composite. Both PLA/DGP and MPLA/TTDGP composites displayed good biocompatibility. DGP increased the polyphenol content, and enhanced the antioxidant properties and biodegradability, of the PLA/DGP and MPLA/TTDGP composites, while TPUSP enhanced the antibacterial properties of the MPLA/TTDGP composite. Graphical abstract
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-021-02471-8