Multimaterial PLA with tailored plasticization using fused deposition modeling for improved flexibility and shape memory recovery

Abstract

The purpose of this study is to develop and characterize high-performance, biodegradable polylactic acid (PLA)-based materials for advanced applications that demand increased flexibility and shape memory capabilities. By introducing triethyl citrate (TEC) as a plasticizer and leveraging multimaterial three-dimensional printing configurations, this research aimed to mitigate PLA’s inherent brittleness and expand its functional range. Additionally, this work sought to optimize design parameters – such as infill orientation and core-shell distribution – to maximize mechanical strength, fracture toughness and shape recovery. Ultimately, this study aspired to broaden PLA’s applicability in fields like biomedical devices, packaging and engineered components.