The influence of halide-mediated oxidation on algae-born adhesives |
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Authors: | Bitton Ronit Berglin Mattias Elwing Hans Colin Carole Delage Ludovic Potin Philippe Bianco-Peled Havazelet |
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Institution: | Inter-Departmental program for Biotechnology, Technion-Israel Institute of Technology, Israel. |
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Abstract: | Adhesive materials extracted from the brown algae Fucus Serratus were studied. These adhesives are composed of cross-linked alginate and polyphenols oxidized in the presence of KI or KBr. All formulations were capable of adhering to a variety of surfaces, however the adhesion properties were influenced by the halide used. SAXS and TEM experiments revealed that oxidized polyphenols self-assemble into chain-like objects, irrespective of the oxidation conditions. Yet, slight differences in the aggregate size were detected. QCM-D results showed that the kinetics of the oxidation was faster with iodide than with bromide. Moreover, oxidation with iodide generates stiffer networks, suggesting that the interaction between the alginate and the polyphenol could be the cause of the reduced adhesion. |
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Keywords: | adhesion algal polymers self‐assembly quartz crystal microbalance (QCM) water‐soluble polymers SAXS |
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