Abstract :
[en] Additive manufacturing (AM) has risen in popularity due to its ability to produce complex shapes in a material-efficient way. However, to produce objects with advanced properties, complex multimaterial strategies are often employed. This one-polymer-one-property paradigm significantly slows down the application of AM, and in particular of fused deposition modeling (FDM), for manufacturing of functional objects. In this study advantage of pluripotency in materials is taken, i.e., the ability to attain different properties from a single stock, to afford mechanically tunable 3D printed dynamic thermosets (moduli from 2 MPa - 3 GPa, 1500× increase, Stress at break from 2 to 70 MPa, 35× increase). To do so, FDM-compatible CO2-derived dissociative polymer networks are designed that undergo a dynamic reaction-induced phase-separation (DRIPS). This strategy enables the control of the size of the rigid phase with a simple post-printing thermal treatment, cascading in spatially patterned mechanical properties. This study showcases new directions for the 3D printing communities, with deep implications in soft robotics and compliant mechanics.
European Projects :
H2020 - 955700 - NIPU - SYNTHESIS, CHARACTERIZATION, STRUCTURE AND PROPERTIES OF NOVEL NONISOCYANATE POLYURETHANES
Funding text :
The authors would like to thank Prof. PhD Itziar Otaegi for their support in mechanical characterization and PhD Lucas Polo de Fonseca for the help in characterizing the phase behavior of the tandem materials. The authors thank for the technical and human support provided by SGIker (UPV/EHU/\u00A0ERDF,\u00A0EU). The authors would like to express thanks for the financial support provided by the NIPU-EJD project; this project has received funding from the European Union's Horizon 2020 research and innovation program under Marie Sk\u0142odowska-Curie Grant Agreement No. 955700. C.D. is FNRS Research Director and thanks FNRS for financial support in the frame of the CO2Switch project under grant T.0075.20. A.J.M. acknowledges the financial support from the Basque Government through grant IT1503-22. The authors acknowledge grant TED2021-129852B-C22 funded by MCIU/AEI/10.13039/501100011033 and by the European Union NextGenerationEU/PRTR and the grant PID2022-138199NB-I00 funded by MCIU/AEI/10.13039/501100011033. D.M. thanks Ayuda RYC2021-031668-I funded by MCIN/AEI/10.13039/501100011033 and by EU NextGenerationEU/PRTR.The authors would like to thank Prof. PhD Itziar Otaegi for their support in mechanical characterization and PhD Lucas Polo de Fonseca for the help in characterizing the phase behavior of the tandem materials. The authors thank for the technical and human support provided by SGIker (UPV/EHU/ ERDF, EU). The authors would like to express thanks for the financial support provided by the NIPU\u2010EJD project; this project has received funding from the European Union's Horizon 2020 research and innovation program under Marie Sk\u0142odowska\u2010Curie Grant Agreement No. 955700. C.D. is FNRS Research Director and thanks FNRS for financial support in the frame of the CO2Switch project under grant T.0075.20. A.J.M. acknowledges the financial support from the Basque Government through grant IT1503\u201022. The authors acknowledge grant TED2021\u2010129852B\u2010C22 funded by MCIU/AEI/10.13039/501100011033 and by the European Union NextGenerationEU/PRTR and the grant PID2022\u2010138199NB\u2010I00 funded by MCIU/AEI/10.13039/501100011033. D.M. thanks Ayuda RYC2021\u2010031668\u2010I funded by MCIN/AEI/10.13039/501100011033 and by EU NextGenerationEU/PRTR.
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