Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 549969
Title Thermoresponsive Complex Coacervate-Based Underwater Adhesive
Author(s) Dompé, Marco; Cedano-Serrano, Francisco J.; Heckert, Olaf; Heuvel, Nicoline van den; Gucht, Jasper van der; Tran, Yvette; Hourdet, Dominique; Creton, Costantino; Kamperman, Marleen
Source Advanced Materials 31 (2019)21. - ISSN 0935-9648
DOI https://doi.org/10.1002/adma.201808179
Department(s) Physical Chemistry and Soft Matter
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) complex coacervates - environmentally triggered phase transitions - lower critical solution temperature - poly(N-isopropylacrylamide) - underwater adhesion
Abstract

Sandcastle worms have developed protein-based adhesives, which they use to construct protective tubes from sand grains and shell bits. A key element in the adhesive delivery is the formation of a fluidic complex coacervate phase. After delivery, the adhesive transforms into a solid upon an external trigger. In this work, a fully synthetic in situ setting adhesive based on complex coacervation is reported by mimicking the main features of the sandcastle worm's glue. The adhesive consists of oppositely charged polyelectrolytes grafted with thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) chains and starts out as a fluid complex coacervate that can be injected at room temperature. Upon increasing the temperature above the lower critical solution temperature of PNIPAM, the complex coacervate transitions into a nonflowing hydrogel while preserving its volume—the water content in the material stays constant. The adhesive functions in the presence of water and bonds to different surfaces regardless of their charge. This type of adhesive avoids many of the problems of current underwater adhesives and may be useful to bond biological tissues.

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