Molecular control via dynamic bonding enables material responsiveness in additively manufactured metallo-polyelectrolytes

Seola Lee (), Pierre J. Walker, Seneca J. Velling, Amylynn Chen, Zane W. Taylor, Cyrus J.B.M Fiori, Vatsa Gandhi, Zhen-Gang Wang and Julia R. Greer
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Seola Lee: California Institute of Technology
Pierre J. Walker: California Institute of Technology
Seneca J. Velling: California Institute of Technology
Amylynn Chen: California Institute of Technology
Zane W. Taylor: California Institute of Technology
Cyrus J.B.M Fiori: California Institute of Technology
Vatsa Gandhi: California Institute of Technology
Zhen-Gang Wang: California Institute of Technology
Julia R. Greer: California Institute of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Metallo-polyelectrolytes are versatile materials for applications like filtration, biomedical devices, and sensors, due to their metal-organic synergy. Their dynamic and reversible electrostatic interactions offer high ionic conductivity, self-healing, and tunable mechanical properties. However, the knowledge gap between molecular-level dynamic bonds and continuum-level material properties persists, largely due to limited fabrication methods and a lack of theoretical design frameworks. To address this critical gap, we present a framework, combining theoretical and experimental insights, highlighting the interplay of molecular parameters in governing material properties. Using stereolithography-based additive manufacturing, we produce durable metallo-polyelectrolytes gels with tunable mechanical properties based on metal ion valency and polymer charge sparsity. Our approach unveils mechanistic insights into how these interactions propagate to macroscale properties, where higher valency ions yield stiffer, tougher materials, and lower charge sparsity alters material phase behavior. This work enhances understanding of metallo-polyelectrolytes behavior, providing a foundation for designing advanced functional materials.

Date: 2024
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DOI: 10.1038/s41467-024-50860-6

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