Photo‐Tunable Elastomers Enabling Reversible, Broad‐Range Modulation of Mechanical Properties Via Dynamic Covalent Crosslinkers DOI Creative Commons

Sihwan Lee,

Yong Eun Cho, Ho‐Young Kim

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Modulating the mechanical properties of soft materials with light is essential for achieving customizable functionalities. However, existing photo‐responsive suffer from limited performance and a restricted tunable range. Here, photo‐tunable elastomer developed by incorporating urethane acrylate network selenosulfide‐based dynamic covalent crosslinkers, high tensile strength exceeding 1.2 MPa in their stiff state variable Young's modulus within 0.8 These crosslinkers undergo selenosulfide photo‐metathesis, gradually breaking under ultraviolet reforming visible light, enabling fine control over modulus, strength, stretchability elastomer. In terms controllability, design supports multiple states, which allow use intermediate properties. Moreover, modeling crosslinking density changes reaction kinetics, variation predicted as function exposure time. The light‐induced modulation facilitates localized property adjustments, generating transformable multi‐material structures enhancing fracture resistance. Integrating these into different polymer networks provides strategy creating various elastomers gels.

Language: Английский

Photo‐Tunable Elastomers Enabling Reversible, Broad‐Range Modulation of Mechanical Properties Via Dynamic Covalent Crosslinkers DOI Creative Commons

Sihwan Lee,

Yong Eun Cho, Ho‐Young Kim

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Modulating the mechanical properties of soft materials with light is essential for achieving customizable functionalities. However, existing photo‐responsive suffer from limited performance and a restricted tunable range. Here, photo‐tunable elastomer developed by incorporating urethane acrylate network selenosulfide‐based dynamic covalent crosslinkers, high tensile strength exceeding 1.2 MPa in their stiff state variable Young's modulus within 0.8 These crosslinkers undergo selenosulfide photo‐metathesis, gradually breaking under ultraviolet reforming visible light, enabling fine control over modulus, strength, stretchability elastomer. In terms controllability, design supports multiple states, which allow use intermediate properties. Moreover, modeling crosslinking density changes reaction kinetics, variation predicted as function exposure time. The light‐induced modulation facilitates localized property adjustments, generating transformable multi‐material structures enhancing fracture resistance. Integrating these into different polymer networks provides strategy creating various elastomers gels.

Language: Английский

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