Optimized Photoinitiator for Fast Two-Photon Absorption Polymerization of Polyester-Macromers for Tissue Engineering

Poocza, Leander; Gottschaldt, Michael; Markweg, Eric; Hauptmann, Nicole; Hildebrandt, Gerhard; Pretzel, David; Hartlieb, Matthias; Reichardt, Christian; Kübel, Joachim; Schubert, Ulrich S.; Mollenhauer, Olaf; Dietzek, Benjamin; Liefeith, Klaus

Abstract:

The efficiency of two-photon polymerization (TPP) techniques depends on the photoinitiator (PI) systems. Objective of this study was to enhance the performance of a cyclopentanone-based PI by introducing polar side chains in order to increase the solubility of the PI in the investigated macromonomers urethanedimethacrylate (UDMA) and lactide-caprolactone-methacrylate (LCM). The conditions for TPP were investigated in writing power/speed arrays. To confirm the high reactivity of the new PI a maximum speed experiment at a concentration of 2% was performed and a TPP structure in the dimensions of several centimeters could be written, which to our knowledge has not yet been reported elsewhere.

Research areas:

• Polymer Science

Year:

2017

Type of Publication:

Article

Journal:

Advanced Engineering Materials

Volume:

19

Pages:

1600686

DOI:

10.1002/adem.201600686