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Article

Tuning the Interactions in Multiresponsive Complex Coacervate-Based Underwater Adhesives

1
Laboratory of Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
2
Soft Matter Sciences and Engineering, ESPCI Paris, PSL University, Sorbonne University, CNRS, F-75005 Paris, France
3
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
4
Laboratory of Polymer Science, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(1), 100; https://doi.org/10.3390/ijms21010100
Received: 5 November 2019 / Revised: 13 December 2019 / Accepted: 19 December 2019 / Published: 21 December 2019
(This article belongs to the Special Issue Wet Adhesion: New Chemistries, Models and Translation to Materials)
In this work, we report the systematic investigation of a multiresponsive complex coacervate-based underwater adhesive, obtained by combining polyelectrolyte domains and thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) units. This material exhibits a transition from liquid to solid but, differently from most reactive glues, is completely held together by non-covalent interactions, i.e., electrostatic and hydrophobic. Because the solidification results in a kinetically trapped morphology, the final mechanical properties strongly depend on the preparation conditions and on the surrounding environment. A systematic study is performed to assess the effect of ionic strength and of PNIPAM content on the thermal, rheological and adhesive properties. This study enables the optimization of polymer composition and environmental conditions for this underwater adhesive system. The best performance with a work of adhesion of 6.5 J/m2 was found for the complex coacervates prepared at high ionic strength (0.75 M NaCl) and at an optimal PNIPAM content around 30% mol/mol. The high ionic strength enables injectability, while the hydrated PNIPAM domains provide additional dissipation, without softening the material so much that it becomes too weak to resist detaching stress. View Full-Text
Keywords: complex coacervate; poly(N-isopropylacrylamide); polyelectrolytes; underwater adhesion; environmentally-triggered setting process; LCST; non-covalent interactions; bioinspired materials complex coacervate; poly(N-isopropylacrylamide); polyelectrolytes; underwater adhesion; environmentally-triggered setting process; LCST; non-covalent interactions; bioinspired materials
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MDPI and ACS Style

Dompé, M.; Cedano-Serrano, F.J.; Vahdati, M.; Sidoli, U.; Heckert, O.; Synytska, A.; Hourdet, D.; Creton, C.; van der Gucht, J.; Kodger, T.; Kamperman, M. Tuning the Interactions in Multiresponsive Complex Coacervate-Based Underwater Adhesives. Int. J. Mol. Sci. 2020, 21, 100. https://doi.org/10.3390/ijms21010100

AMA Style

Dompé M, Cedano-Serrano FJ, Vahdati M, Sidoli U, Heckert O, Synytska A, Hourdet D, Creton C, van der Gucht J, Kodger T, Kamperman M. Tuning the Interactions in Multiresponsive Complex Coacervate-Based Underwater Adhesives. International Journal of Molecular Sciences. 2020; 21(1):100. https://doi.org/10.3390/ijms21010100

Chicago/Turabian Style

Dompé, Marco, Francisco J. Cedano-Serrano, Mehdi Vahdati, Ugo Sidoli, Olaf Heckert, Alla Synytska, Dominique Hourdet, Costantino Creton, Jasper van der Gucht, Thomas Kodger, and Marleen Kamperman. 2020. "Tuning the Interactions in Multiresponsive Complex Coacervate-Based Underwater Adhesives" International Journal of Molecular Sciences 21, no. 1: 100. https://doi.org/10.3390/ijms21010100

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