Optimized Photoinitiator for Fast Two‐Photon Absorption Polymerization of Polyester‐Macromers for Tissue Engineering1 . Issue 3 (11th January 2017)

• Record Type: Journal Article
• Authors: Poocza, Leander; Gottschaldt, Michael; Markweg, Eric; Hauptmann, Nicole; Hildebrand, Gerhard; Pretzel, David; Hartlieb, Matthias; Reichardt, Christian; Kübel, Joachim; Schubert, Ulrich S.; Mollenhauer, Olaf; Dietzek, Benjamin; Liefeith, Klaus
• Is Part Of: Advanced engineering materials. Volume 19:Issue 3(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-01-11
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201600686
• Languages: English
• ISSNs: 1438-1656

Abstract

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. Abstract : A novel organic photoinitiator for two photon polymerization (TPP) by functionalization of photoinitiator side groups for enhanced reactivity with lactide‐caprolactone methacrylates facilitated TPP structures in centimeter dimensions by a new processing approach. Maximum TPP writing speed revealed a selectiveness for the chosen lactide‐caprolactone which was five times faster than in the control material (UDMA).