Volume 136, Issue 41 e202408673
Forschungsartikel

Ion-Specific Interactions Engender Dynamic and Tailorable Properties in Biomimetic Cationic Polyelectrolytes

Filip J. Aubrecht

Filip J. Aubrecht

Department of Chemistry, Brown University, 324 Brook Street, Providence, RI-02912 USA

Contribution: Data curation (lead), ​Investigation (lead), Methodology (lead), Writing - original draft (supporting), Writing - review & editing (supporting)

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Kennalee Orme

Kennalee Orme

Department of Chemistry, Brown University, 324 Brook Street, Providence, RI-02912 USA

Indicates that these authors contributed equally.

Contribution: ​Investigation (supporting), Writing - original draft (supporting), Writing - review & editing (supporting)

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Aiden Saul

Aiden Saul

Department of Chemistry, Brown University, 324 Brook Street, Providence, RI-02912 USA

Indicates that these authors contributed equally.

Contribution: Data curation (supporting), Methodology (supporting)

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Hongyi Cai

Hongyi Cai

Materials Science and Engineering, Cornell University, Ithaca, New York, 14853 USA

Contribution: Formal analysis (supporting), Methodology (supporting), Writing - review & editing (supporting)

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Dr. Tharindu A. Ranathunge

Dr. Tharindu A. Ranathunge

Department of Chemistry, Brown University, 324 Brook Street, Providence, RI-02912 USA

Contribution: ​Investigation (supporting), Writing - review & editing (supporting)

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Prof. Meredith N. Silberstein

Prof. Meredith N. Silberstein

Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, 14853 USA

Contribution: Methodology (supporting), Writing - review & editing (supporting)

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Prof. Benjamin R. McDonald

Corresponding Author

Prof. Benjamin R. McDonald

Department of Chemistry, Brown University, 324 Brook Street, Providence, RI-02912 USA

Contribution: Conceptualization (lead), Formal analysis (lead), Supervision (lead), Writing - original draft (lead), Writing - review & editing (lead)

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First published: 09 July 2024

Abstract

Biomaterials such as spider silk and mussel byssi are fabricated by the dynamic manipulation of intra- and intermolecular biopolymer interactions. Organisms modulate solution parameters, such as pH and ion co-solute concentration, to effect these processes. These biofabrication schemes provide a conceptual framework to develop new dynamic and responsive abiotic soft material systems. Towards these ends, the chemical diversity of readily available ionic compounds offers a broad palette to manipulate the physicochemical properties of polyelectrolytes via ion-specific interactions. In this study, we show for the first time that the ion-specific interactions of biomimetic polyelectrolytes engenders a variety of phase separation behaviors, creating dynamic thermal- and ion-responsive soft matter that exhibits a spectrum of physical properties, spanning viscous fluids to viscoelastic and viscoplastic solids. These ion-dependent characteristics are further rendered general by the merger of lysine and phenylalanine into a single, amphiphilic vinyl monomer. The unprecedented breadth, precision, and dynamicity in the reported ion-dependent phase behaviors thus introduce a broad array of opportunities for the future development of responsive soft matter; properties that are poised to drive developments in critical areas such as chemical sensing, soft robotics, and additive manufacturing.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.