Print Email Facebook Twitter Solvent-Free Three-Dimensional Printing of Biodegradable Elastomers Using Liquid Macrophotoinitiators Title Solvent-Free Three-Dimensional Printing of Biodegradable Elastomers Using Liquid Macrophotoinitiators Author Sandmeier, Matthias (ETH Zürich) Paunović, Nevena (ETH Zürich) Conti, Riccardo (ETH Zürich) Hofmann, Leopold (ETH Zürich) Wang, Jieping (ETH Zürich) Luo, Zhi (ETH Zürich) Masania, K. (TU Delft Aerospace Manufacturing Technologies; ETH Zürich) Wu, N. (TU Delft Team Bart De Schutter; Lab of Organic Chemistry; ETH Zürich) Kleger, Nicole (ETH Zürich) Date 2021 Abstract Vat photopolymerization 3D printing provides new opportunities for the fabrication of tissue scaffolds and medical devices. However, for the manufacturing of biodegradable elastomers, it usually requires the use of organic solvents to dissolve the solid photoinitators and achieve low resin viscosity, making this process environmentally unfriendly and not optimal for biomedical applications. Here, we report solvent-free 3D printing of biodegradable elastomers by digital light processing with well-defined photoinitiator-polymer conjugates. Being in liquid state at room temperature, the macrophotoinitiators enabled high-quality 3D printing in the absence of any organic solvents that are usually used in digital light 3D printing. This allowed the systematic investigation of structure-property relationships of 3D-printed biodegradable elastomers without the interference from reactive diluents. The developed macrophotoinitiators were compatible with various photopolymers and could be applied for solvent-free fabrication of biodegradable shape-memory devices. This work offers new perspectives for the solvent-free additive manufacturing of bioresorbable medical implants and other functional devices. To reference this document use: http://resolver.tudelft.nl/uuid:11274c68-da0b-4104-9d11-dc95c11b9595 DOI https://doi.org/10.1021/acs.macromol.1c00856 ISSN 0024-9297 Source Macromolecules, 54 (17), 7830-7839 Part of collection Institutional Repository Document type journal article Rights © 2021 Matthias Sandmeier, Nevena Paunović, Riccardo Conti, Leopold Hofmann, Jieping Wang, Zhi Luo, K. Masania, N. Wu, Nicole Kleger, More Authors Files PDF acs.macromol.1c00856.pdf 5.6 MB Close viewer /islandora/object/uuid:11274c68-da0b-4104-9d11-dc95c11b9595/datastream/OBJ/view