Abstract
Strong polyelectrolytes, poly(styrene sulfonate) (PSS), and poly(diallyldimethylammonium) (PDADMAC) dissolved in aqueous KBr can be 3D printed for the first time in the air via direct ink writing (DIW). Viscous polyelectrolyte complex (PEC) solutions were deposited layer-by-layer and quenched with deionized water to produce mechanically viable, viscoelastic hydrogel objects. Optimal inks were confirmed by rheology and thermogravimetric measurements to map flow behavior with material composition. Post-print handling and storage protocols were developed to produce printed resolutions more consistent with conventional DIW.
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Acknowledgments
We acknowledge technical support from Frontier Laboratories and Quantum Analytics. This work (or part of this work) was conducted in Oak Ridge National Laboratory Center for Nanophase Materials Sciences by R. C. Advincula, a US Department of Energy Office of Science User Facility.
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Jurago, A.A., Viers, R.A., Nguyen, A.T. et al. On the 3D printing of polyelectrolyte complexes: A novel approach to overcome rheology constraints. MRS Communications 13, 862–870 (2023). https://doi.org/10.1557/s43579-023-00415-5
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DOI: https://doi.org/10.1557/s43579-023-00415-5