Seminar Series

Influence of Shape Geometry on Ideal Bioprinter Parameters Required for High Shape Accuracy when printing with Pluronic F-127

Speaker

Campbell Stevens

Institute

Department of Mechanical Engineering, University of Canterbury

Time & Place

Thu, 10 Mar 2022 14:00:00 NZDT in E6, Engineering Core

Abstract

This research project investigated the effect of printed shape geometry on the ideal printer parameters required to print structures out of bioinks with high dimensional accuracy. Structures were printed out of Pluronic F-127 using the Biobot Basic, an entry-level bioprinter made by Advanced Systems. Three different shapes were investigated; cubes, cylinders and square pyramids. Four printer parameters that were believed to have a significant effect on the printing behavior were varied. These were writing head speed, printer pressure, line width and line height. It was found that pressure had the greatest effect on print accuracy, followed by writing head speed, then line height and line width. Close to ideal printer parameters were found for all shapes, but high print accuracy was not entirely achieved. Cubes had great width accuracy but tended to be shorter than prescribed. Cylinders were similar to cubes, and also consistently suffered from printing head interference on the final layer. The ideal speed for cylinders was greater than the ideal speed for cubes. Square pyramids were consistently undersized in all dimensions. The ideal pressure for square pyramids was greater than the ideal pressure for cubes.

 

 Supervisor: Dr Debbie Munro