3D-Printed PLA Mechanical and Viscoelastic Behavior Dependence on the Nozzle Temperature and Printing Orientation

Polymers, Год журнала: 2025, Номер 17(7), С. 913 - 913

Опубликована: Март 28, 2025

The present study focuses on the mechanical and viscoelastic characterization of 3D-printed PLA, fabricated in three different printing orientations (0°, 45°, 90°) four nozzle temperatures (210, 220, 230, 240 °C). By employing a combination static dynamic analysis (DMA) testing, as well differential scanning calorimetry (DSC) analysis, this work aims to investigate relationship between processing parameters resulting properties PLA. DSC results showed that higher enhance degree crystallinity, which turn affects behavior Regardless temperature, flexural strength decreased orientation degrees increased. However, it was found for same orientation, smaller deviations per specimen. DMA indicated increased, glass transition temperature (Tg) values increased while storage modulus decreased. At time, both cases, by increasing an increase Tg respective is observed due crystallinity.

Язык: Английский

Biodegradation, mechanical and biocompatibility evaluation of compact and porous polylactic acid after long‐term dynamic fluid immersion

Journal of Chemical Technology & Biotechnology, Год журнала: 2025, Номер unknown

Опубликована: Май 19, 2025

Abstract BACKGROUND Polylactic acid (PLA) is the most widely used thermoplastic in applications benefit of humans, such as biomedicine and food packaging. However, its behaviour when operating relevant environments has not been fully investigated. In this research, effect long‐term interaction between biocompatible PLA a physiological fluid was monitored. RESULTS The weight variation samples, well their micro‐ nanomechanical properties, were evaluated during immersion until dissolution. Scanning electron micrographs indicated degradation layer line from Day (D)3 onwards. More pronounced damage involved plasticization breakage noted after D14. samples started to decrease considerably first month immersion. Scaffolds dissolved D70 microscopic compression modulus decreased 100 45 MPa within 42 days Nanoindentation testing important surface properties (stiffness hardness) by immersion, especially case higher loading forces 3000 μΝ. Biomarker analysis stem cells deposited on substrates revealed correlation material profile biomarkers variations. CONCLUSIONS biodegradation rate mechanical performance both compact porous investigated cell culture medium, which closely mimics body composition, dynamic environment involving stirring conditions temperature. A found at microscale with nanoscale events feedback. © 2025 Author(s). Journal Chemical Technology Biotechnology published John Wiley & Sons Ltd behalf Society Industry (SCI).

Язык: Английский

Photoreforming for upcycling of plastics into energy, chemicals and materials: a review

Environmental Chemistry Letters, Год журнала: 2025, Номер unknown

Опубликована: Май 26, 2025

Язык: Английский