This study developed hybrid poly(lactic acid) (PLA)/thermoplastic starch (TPS) biocomposites reinforced with spent coffee grounds (AK, 0–30 wt%) and compatibilized with maleic anhydride (MA, 5 wt%). The composites were characterized using Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), tensile testing, melt flow rate (MFR), water absorption, and soil‐burial biodegradability. Increasing AK content improved stiffness and biodegradation because of its lignocellulosic structure; however, excessive filler loading caused agglomeration and reduced ductility. MA enhanced interfacial compatibility, filler dispersion, stress transfer, and moisture resistance at low to moderate AK contents. The AK 10% + MA formulation showed the most balanced performance, achieving a tensile strength of 29.86 MPa, low water absorption, favorable melt flow behavior, and 28.03% weight loss after 3 months of soil burial. These results clarify the role of AK and MA in controlling the processing–structure–property–biodegradation relationship of PLA/TPS composites and support the use of spent coffee grounds as sustainable fillers for biodegradable bioplastics.
This study investigates the combined effects of wood flour (WF) and a starch-based compound on the physical, thermal, and soil-burial mass loss properties of polylactic acid (PLA) biocomposites, intentionally omitting compatibilizers to isolate inherent interfacial interactions. Composites were prepared via extrusi...
Ali Salimian Rizi, S. M. Zebarjad, Z. Sherafat· Scientific Reports· 0 citations
Wheat straw/poly(lactic acid) (WS/PLA) biocomposites provide a promising route for agricultural residue valorization, but poor interfacial compatibility limits their performance. This study investigated the effect of maleic-anhydride-grafted PLA (PLA-g-MAH) on WS/PLA biocomposites containing 50 wt% wheat straw. PLA-g-M...
The growing demand for sustainable lightweight materials has encouraged the development of hybrid polymer composites reinforced with natural fibers and agricultural waste. In this study, polypropylene (PP) hybrid composites reinforced with short woven hemp fibers (SWHFs), chopped basalt fibers (BFs), wheat straw ash (W...
Abdelkader Daikh, Noureddine Mahmoudi, M. Bentahar· Materials Research Express· 0 citations
Poly(lactic acid) (PLA) composites are attractive candidates for sustainable applications. However, achieving an optimal balance between toughness and heat resistance without sacrificing biobased content remains a persistent challenge. Herein, we develop PLA composites exhibiting concurrently high stiffness, toughnes...
Zhen-Feng Wang, Zi-He Zhao, Yu Cheng et al.· Industrial & Engineering...· 0 citations
Growing environmental concerns associated with petroleum‐based plastics have intensified the demand for sustainable, biodegradable materials for packaging applications. Sodium alginate is a natural polysaccharide with excellent biodegradability, biocompatibility, and film‐forming ability; however, its high moisture...
Sofia de Oliveira Pires, C. D. da Silveira, A. F. de Oliveira· Journal of Applied Polymer S...· 0 citations
A lichen‐derived natural material, known as “höllük” in southeastern Turkey, is introduced as a renewable filler for polylactic acid (PLA). X‐ray diffraction and scanning electron microscope analysis of höllük identified quartz and calcite as the major crystalline phases within a silicate‐organic matrix, and thermo...
H. Esen, Necip Elbir, M. B. Alanalp et al.· Polymer Composites· 0 citations
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