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    Surface Etching of 3D Printed Poly(lactic acid) with NaOH: A Systematic Approach

    Year: 2020

    Journal: Polymers, Volume 12, AUG

    Authors: Schneider, Matthias; Fritzsche, Nora; Puciul-Malinowska, Agnieszka; Balis, Andrzej; Mostafa, Amr; Bald, Ilko; Zapotoczny, Szczepan; Taubert, Andreas

    Organizations: University of Potsdam, Germany; Jagiellonian University, Krakow, Poland

    Keywords: surface modification; sodium hydroxide etching; poly(lactic acid); 3D printing; roughness; wettability; erosion

    The article describes a systematic investigation of the effects of an aqueous NaOH treatment of 3D printed poly(lactic acid) (PLA) scaffolds for surface activation. The PLA surface undergoes several morphology changes and after an initial surface roughening, the surface becomes smoother again before the material dissolves. Erosion rates and surface morphologies can be controlled by the treatment. At the same time, the bulk mechanical properties of the treated materials remain unaltered. This indicates that NaOH treatment of 3D printed PLA scaffolds is a simple, yet viable strategy for surface activation without compromising the mechanical stability of PLA scaffolds.
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