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August 30, 2026Discover MaterialsOpen Access

Fungal-mediated modification of spent coffee grounds for enhanced interfacial compatibility and biodegradability of green composites

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Authors

DDDalel DaâssiCentre of Biotechnology of SfaxRKRihab KlifiUniversity of SfaxSASébastien AlixREGARDS Recherches en Économie Gestion AgroRessources Durabilité Santé

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Implication

Experimental study demonstrates enhanced thermal stability and biodegradation in polylactic acid composites, indicating fungal-fermented coffee grounds serve as high-performance biofillers.

Key Points

  • Evaluate the interfacial compatibility, thermal properties, and biodegradability of polylactic acid composites reinforced with fungal-fermented spent coffee grounds.
  • Fabricated polylactic acid biocomposites reinforced with 20 wt% untreated spent coffee grounds (SCG_NT) or fungal biomass produced via solid-state fermentation (FB-SCG/SSF) and submerged liquid fermentation (FB-SCG/SmL).
  • Characterized morphology, chemical structure, and thermal-mechanical behavior using SEM, FTIR, DSC, and TGA, and evaluated biodegradability under simulated aerobic composting conditions (ASTM D5338).
  • Composite crystallinity increased to 26–27% (peaking at 27% in FB-SCG/SmL) compared with 9% in neat PLA, while char residues reached 12–18% at 600 °C versus <1% in neat PLA.
  • The PLA 20% FB-SCG/SmL composite achieved the highest composting performance, reaching 96±3.2% mineralization after 90 days under ASTM D5338 testing.

Cite This Study

Daâssi et al. (2026) studied this question.

synapsesocial.com/papers/6a93f0576c1a8fb52e79c729https://doi.org/10.1007/s43939-026-00938-3
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Also Consider

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  3. 3The effect of filler loading, biological treatment, and bioplastic blend ratio on flexural and impact properties of blended bioplastic reinforced with spent coffee ground2024 · 5 citations
  4. 4Ecocomposite Filaments from Spent Coffee Grounds for FFF 3D Printing: Material Properties and Printability2026
  5. 5Using Fungal Biomass to Enhance Biodegradability and Flexibility of Plasticized Poly(lactic acid) Matrix Composites2026