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Proceedings Paper

Multiscale 3D manufacturing: combining thermal extrusion printing with additive and subtractive direct laser writing
Author(s): Mangirdas Malinauskas; Laurynas Lukoševičius; Dovilė Mackevičiūtė; Evaldas Balčiūnas; Sima Rekštytė; Domas Paipulas
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Paper Abstract

A novel approach for efficient manufacturing of three-dimensional (3D) microstructured scaffolds designed for cell studies and tissue engineering applications is presented. A thermal extrusion (fused filament fabrication) 3D printer is employed as a simple and low-cost tabletop device enabling rapid materialization of CAD models out of biocompatible and biodegradable polylactic acid (PLA). Here it was used to produce cm- scale microporous (pore size varying from 100 to 400 µm) scaffolds. The fabricated objects were further laser processed in a direct laser writing (DLW) subtractive (ablation) and additive (lithography) manners. The first approach enables precise surface modification by creating micro-craters, holes and grooves thus increasing the surface roughness. An alternative way is to immerse the 3D PLA scaffold in a monomer solution and use the same DLW setup to refine its inner structure by fabricating dots, lines or a fine mesh on top as well as inside the pores of previously produced scaffolds. The DLW technique is empowered by ultrafast lasers - it allows 3D structuring with high spatial resolution in a great variety of photosensitive materials. Structure geometry on macro- to micro- scales could be finely tuned by combining these two fabrication techniques. Such artificial 3D substrates could be used for cell growth or as biocompatible-biodegradable implants. This combination of distinct material processing techniques enables rapid fabrication of diverse functional micro- featured and integrated devices. Hopefully, the proposed approach will find numerous applications in the field of ms, microfluidics, microoptics and many others.

Paper Details

Date Published: 1 May 2014
PDF: 12 pages
Proc. SPIE 9135, Laser Sources and Applications II, 91350T (1 May 2014); doi: 10.1117/12.2051520
Show Author Affiliations
Mangirdas Malinauskas, Vilnius Univ. (Lithuania)
Laurynas Lukoševičius, Vilnius Univ. (Lithuania)
Dovilė Mackevičiūtė, Vilnius Univ. (Lithuania)
Evaldas Balčiūnas, Vilnius Univ. (Lithuania)
Sima Rekštytė, Vilnius Univ. (Lithuania)
Domas Paipulas, Vilnius Univ. (Lithuania)

Published in SPIE Proceedings Vol. 9135:
Laser Sources and Applications II
Jacob I. Mackenzie; Helena JelÍnková; Takunori Taira; Marwan Abdou Ahmed, Editor(s)

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