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Enhancement of the Adhesive Properties by Optimizing the Water Content in PNIPAM-Functionalized Complex Coacervates

Abstract : Most commercially available soft tissue glues offer poor performance in the human body. Inspired by sea water organisms, we have developed an injectable adhesive whose setting mechanism is activated by a variation in environmental factors (e.g temperature and/or ionic strength). The material is prepared by mimicking a mechanism observed in many natural glues: complex coacervation, a liquid-liquid phase separation between oppositely charged polyelectrolytes. Complex coacervates are characterized by a high-water content, which inevitably weakens the glue. Here, we target the increase of the adhesive properties by systematically tuning the water content, a key parameter affecting the material performance. Among the several strategies here explored, the most effective one is the mechanical removal of water using an extruder, resulting in a work of adhesion increase of one order of magnitude compared to the original formulation.
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https://hal.archives-ouvertes.fr/hal-03112942
Contributor : Bruno Publis_simm <>
Submitted on : Sunday, January 17, 2021 - 10:44:13 PM
Last modification on : Tuesday, January 19, 2021 - 3:32:40 AM

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Marco Dompé, Mehdi Vahdati, Froukje van Ligten, Francisco J. Cedano-Serrano, Dominique Hourdet, et al.. Enhancement of the Adhesive Properties by Optimizing the Water Content in PNIPAM-Functionalized Complex Coacervates. ACS Applied Polymer Materials, American Chemical Society, 2020, 2 (4), pp.1722-1730. ⟨10.1021/acsapm.0c00185⟩. ⟨hal-03112942⟩

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