POROUS STRUCTURES DEVELOPED FROM NOVEL THERMOPLASTIC-CERAMIC SYSTEMS VIA FUSED DEPOSITION

HUNG HUNG, YUK MING X.; CAMERUCCI, MARÍA A.; TALOU, MARIANO H.

Darmstadt

Congreso; Materials Science and Engineering Congress 2018 (MSE 2018); 2018

German Materials Society (DGM)

Fused deposition modeling (FDM) is an additive manufacturing (AM) method which can be employed for producing porous ceramic parts. During forming, specific polymer-based systems containing ceramic particles, soften and melt to build the object layer by layer in which particles are embedded. Almost all commercial binder systems are PP-based and the ceramic particles must be coated with a surfactant in order to facilitate the hot mixing with the binder. For this reason, in a first part of this work, the use of others polar thermoplastic polymers widely used in 3D printing (PLA, ABS and PA12) as base polymer was evaluated considering the interaction of alumina particles with soften/molten polymers and the effect of adding oleyl alcohol (OA; surfactant) to alumina powder. Based on results obtained of this study, arose the need to design and study an alternative thermoplastic-ceramic system to be processed via FDM with the aim of producing porous ceramic structures. In this way, the technique of thermally induced phase separation (TIPS) was used to obtain the printer feed material as ceramic-polymer granules, and the extruder of the 3D FDM printer had to be modified.