Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Polyhydroxy-3-Butyrate (PHB) Composite Materials Reinforced with Barley Waste Straw Fibres for Agriculture Applications : Production, Characterization and Scale-Up Analysis

Version 1 : Received: 27 December 2023 / Approved: 27 December 2023 / Online: 27 December 2023 (14:43:42 CET)

How to cite: Oliver-Ortega, H.; Evon, P.; Espinach, F.X.; Raynaud, C.; Méndez, J.A. Polyhydroxy-3-Butyrate (PHB) Composite Materials Reinforced with Barley Waste Straw Fibres for Agriculture Applications : Production, Characterization and Scale-Up Analysis. Preprints 2023, 2023122123. https://doi.org/10.20944/preprints202312.2123.v1 Oliver-Ortega, H.; Evon, P.; Espinach, F.X.; Raynaud, C.; Méndez, J.A. Polyhydroxy-3-Butyrate (PHB) Composite Materials Reinforced with Barley Waste Straw Fibres for Agriculture Applications : Production, Characterization and Scale-Up Analysis. Preprints 2023, 2023122123. https://doi.org/10.20944/preprints202312.2123.v1

Abstract

Barley straw was used to reinforce PHB in a discontinuous semi-industrial process. Four different fibres were used as reinforcing material : sawdust (SW), defibred (DFBF), delignified (DBF) and bleached (BBF) fibres. Looking at the mechanical properties, onlythe elastic moduli (Et) revealed an improvement. Oppositely, the strengths at break, under both tensile and bending assays, tended to decrease, evidencing a poor affinity between both components. Thanks to the mechani-cal treatment applied on the fibre, DFBF appeared as the most promising filler with the mechani-cal properties of the composites closest to those of neat PHB. DFBF-based composites were then produced by means of a process intensification using a twin-screw extruder, and then moulded into flowerpots. Mechanical results showed almost the same properties between the discontinuous and intensification processes. The suitability of the material to be used on agriculture flowerpots was demonstrated by simulation. . PHB-DFBF composite material can be considered an alterna-tive to replace petrol-based products for applications in agriculture and horticulture.

Keywords

Biocomposite; Twin-screw extrusion; Injection; Computational modelling.

Subject

Chemistry and Materials Science, Materials Science and Technology

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