alexa Dynamic polymer systems with self-regulated secretion for the control of surface properties and material healing.
Chemistry

Chemistry

Journal of Physical Chemistry & Biophysics

Author(s): Cui J, Daniel D, Grinthal A, Lin K, Aizenberg J, Cui J, Daniel D, Grinthal A, Lin K, Aizenberg J, Cui J, Daniel D, Grinthal A, Lin K, Aizenberg J, Cui J, Daniel D, Grinthal A, Lin K, Aizenberg J

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Abstract Approaches for regulated fluid secretion, which typically rely on fluid encapsulation and release from a shelled compartment, do not usually allow a fine continuous modulation of secretion, and can be difficult to adapt for monitoring or function-integration purposes. Here, we report self-regulated, self-reporting secretion systems consisting of liquid-storage compartments in a supramolecular polymer-gel matrix with a thin liquid layer on top, and demonstrate that dynamic liquid exchange between the compartments, matrix and surface layer allows repeated, responsive self-lubrication of the surface and cooperative healing of the matrix. Depletion of the surface liquid or local material damage induces secretion of the stored liquid via a dynamic feedback between polymer crosslinking, droplet shrinkage and liquid transport that can be read out through changes in the system's optical transparency. We foresee diverse applications in fluid delivery, wetting and adhesion control, and material self-repair. This article was published in Nat Mater and referenced in Journal of Physical Chemistry & Biophysics

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