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Valorization of oat hull fiber from agri-food industrial waste as filler for poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)

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Abstract

Oat hull fibers are an agri-food industrial waste used in this research as a filler for a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) matrix, to obtain a fully bio-based polymer-matrix composite material. The compounding process was carried out with a twin-screw extruder, avoiding chemical solvents and employing a technology commonly used by the industrial field. Silanization procedure was run to improve the affinity between the matrix and the filler. Compounds were structurally, microstructurally, mechanically and thermally characterized. Results denote that also at 8 v/v%, oat hull fibers work not only as inert filler, but also they have a slightly improving effect on mechanical properties of neat biopolymer, increasing of almost 12% the Young’s modulus, without a loss in tensile elongation at break. Therefore, this research study is a noteworthy approach which reduces the material costs and PHBH volumes, while valorizing waste biomasses.

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Acknowledgements

The authors are grateful to GEA Mechanical Equipment, and particularly to Dr. Silvia Grasselli, for supplying the oat hull fibers, and they thank as well MAIP Group for supplying PHBH pellets.

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Authors and Affiliations

  1. Department of Engineering and Architecture, University of Parma, Parma, Italy

    Alberto Giubilini & Corrado Sciancalepore

  2. INSTM, National Consortium of Material Science and Technology, Florence, Italy

    Alberto Giubilini, Corrado Sciancalepore, Massimo Messori & Federica Bondioli

  3. Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Modena, Italy

    Massimo Messori

  4. Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy

    Federica Bondioli

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  1. Alberto Giubilini
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  2. Corrado Sciancalepore
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  4. Federica Bondioli
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Correspondence to Alberto Giubilini.

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Giubilini, A., Sciancalepore, C., Messori, M. et al. Valorization of oat hull fiber from agri-food industrial waste as filler for poly(3-hydroxybutyrate-co-3-hydroxyhexanoate). J Mater Cycles Waste Manag 23, 402–408 (2021). https://doi.org/10.1007/s10163-020-01104-4

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  • DOI: https://doi.org/10.1007/s10163-020-01104-4

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