Formulation of Green Particulate Composites from PLA and PBS Matrix and Wastes Deriving from the Coffee Production

  • Grazia Totaro
  • Laura SistiEmail author
  • Maurizio Fiorini
  • Isabella Lancellotti
  • Fernanda N. Andreola
  • Andrea Saccani
Original paper


Particulate composites based on poly(lactic acid) and poly(butylene succinate) biopolymers have been formulated. Silver skin, the by-product derived from the roasting of coffee beans, has been used as a filler up to a 30 wt% of loading. The microstructure, crystallinity, thermal stability, mechanical properties and water absorption of the derived composites have been investigated. Data so far collected underline that a trade-off of the mechanical properties can be obtained by adding the filler, while the overall amount of crystallinity remains constant. Up to the highest filler content, moisture uptake follows a Fichian behaviour while the value of the contact angle is slightly increased by modification. Thus, silver skin, which actually is used for fuel or soil fertilization, finds here a different environmentally friendly valorization into the field of biocomposites.


PLA PBS Green composite Agro-waste Coffee production 



This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. Thanks are due to Cagliari spa (Modena, Italy) for supplying silver skins.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Civil, Chemical, Environmental and Materials EngineeringUniversity of BolognaBolognaItaly
  2. 2.Department of Engineering “Enzo Ferrari”University of Modena and Reggio EmiliaModenaItaly

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