Modeling and Simulation of a Selective Laser Foaming Process for Fabrication of Microliter Tissue Engineering Scaffolds

[+] Author and Article Information
JinGyu Ock

Department of Mechanical Engineering, The University of Texas at Austin, Texas 78712

Wei Li

Department of Mechanical Engineering, The University of Texas at Austin, Texas 78712

1Corresponding author.

ASME doi:10.1115/1.4037425 History: Received February 14, 2017; Revised July 18, 2017


Selective laser foaming is a novel process that combines solid-state foaming and laser ablation to fabricate an array of microliter tissue engineering scaffolds on a polymeric chip for biomedical applications. In this study, a finite element analysis model is developed to investigate the effect of laser process parameters. Experimental results with biodegradable polylactic acid (PLA) were used for validation. It is found that foaming always occurs before ablation and once it occurs the temperature increases dramatically due to an enhanced laser absorption effect of the porous structure. The geometry of fabricated scaffolds can be controlled by laser parameters. While the depth of scaffolds can be controlled by laser power and lasing time, the diameter is more effectively controlled by the laser power. The model developed in this study can be used to optimize and control the selective foaming process.

Copyright (c) 2017 by ASME
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