Melt Electrowriting of Nylon-12 Microfibers with an Open-Source 3D Printer.

Autor: Reizabal A; Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, 97405, USA.; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa, 48940, Spain., Devlin BL; Centre for Biomedical Technologies, Queensland University of Technology (QUT), Kelvin Grove, 4059, Australia., Paxton NC; Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, 97405, USA.; Centre for Biomedical Technologies, Queensland University of Technology (QUT), Kelvin Grove, 4059, Australia., Saiz PG; Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, 97405, USA.; Macromolecular Chemistry Research Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology, UPV/EHU, Leioa, 48940, Spain., Liashenko I; Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, 97405, USA., Luposchainsky S; Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, 97405, USA., Woodruff MA; Centre for Biomedical Technologies, Queensland University of Technology (QUT), Kelvin Grove, 4059, Australia., Lanceros-Mendez S; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa, 48940, Spain.; Ikerbasque, Basque Foundation for Science, Bilbao, 48009, Spain., Dalton PD; Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, 97405, USA.
Jazyk: angličtina
Zdroj: Macromolecular rapid communications [Macromol Rapid Commun] 2023 Dec; Vol. 44 (24), pp. e2300424. Date of Electronic Publication: 2023 Oct 24.
DOI: 10.1002/marc.202300424
Abstrakt: This study demonstrates how either a heated flat or cylindrical collector enables defect-free melt electrowriting (MEW) of complex geometries from high melting temperature polymers. The open-source "MEWron" printer uses nylon-12 filament and combined with a heated flat or cylindrical collector, produces well-defined fibers with diameters ranging from 33 ± 4 to 95 ± 3 µm. Processing parameters for stable jet formation and minimal defects based on COMSOL thermal modeling for hardware design are optimized. The balance of processing temperature and collector temperature is achieved to achieve auxetic patterns, while showing that annealing nylon-12 tubes significantly alters their mechanical properties. The samples exhibit varied pore sizes and wall thicknesses influenced by jet dynamics and fiber bridging. Tensile testing shows nylon-12 tubes are notably stronger than poly(ε-caprolactone) ones and while annealing has limited impact on tensile strength, yield, and elastic modulus, it dramatically reduces elongation. The equipment described and material used broadens MEW applications for high melting point polymers and highlights the importance of cooling dynamics for reproducible samples.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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