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Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

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Poly-Lactic Acid-Bagasse Based Bio-Composite for Additive Manufacturing.

Silvia Carichino1, Dino Scanferla1, Daniela Fico1

  • 1Department of Engineering for Innovation, University of Salento, Edificio P, Campus Ecotekne, s.p. 6 Lecce-Monteroni, 73100 Lecce, Italy.

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Summary

This study recycles beer bagasse into Poly-lactic acid (PLA)-based bio-composites for 3D printing. The resulting materials show printability and potential for additive manufacturing applications.

Keywords:
3D printingadditive manufacturingbagassebio-compositespoly-lactic acid (PLA)

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Area of Science:

  • Materials Science
  • Sustainable Engineering
  • Polymer Science

Background:

  • Beer bagasse is an abundant industrial waste stream with underutilized potential.
  • Developing sustainable alternatives to conventional plastics is crucial for environmental conservation.
  • Additive manufacturing offers novel pathways for waste valorization.

Purpose of the Study:

  • To develop an efficient method for recycling beer bagasse into Poly-lactic acid (PLA)-based bio-composites.
  • To assess the suitability of these bio-composites for extrusion-based 3D printing.
  • To evaluate the properties and performance of 3D-printed components derived from these novel materials.

Main Methods:

  • Physical and chemical characterization of beer bagasse.
  • Formulation of PLA-based bio-composites with varying plasticizer concentrations.
  • Extrusion and filament production of the bio-composites.
  • Additive manufacturing (3D printing) using two different machines.
  • Evaluation of thermal, physical, and mechanical properties of the printed parts.

Main Results:

  • Beer bagasse was successfully incorporated into PLA to create printable bio-composites.
  • Plasticizers enhanced the processability and polymer-bagasse interface.
  • No significant changes in thermal properties were observed compared to neat PLA.
  • A reduction in mechanical properties was noted in the 3D-printed bio-composites versus neat PLA.
  • Printability was confirmed, with variations based on composition and 3D printing technology.

Conclusions:

  • Beer bagasse holds significant potential for creating value-added materials for additive manufacturing.
  • PLA-based bio-composites from beer bagasse offer a sustainable route for waste valorization.
  • Further optimization is needed to enhance mechanical performance for broader applications.