The influence of halide-mediated oxidation on algae-born adhesives.
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.
Bitton
Ronit
R
Inter-Departmental program for Biotechnology, Technion-Israel Institute of Technology, Israel.
Berglin
Mattias
M
Elwing
Hans
H
Colin
Carole
C
Delage
Ludovic
L
Potin
Philippe
P
Bianco-Peled
Havazelet
H
D000269:Adhesives / Q000378:metabolism*; D000464:Alginates / Q000378:metabolism; D001965:Bromides / Q000494:pharmacology*; D002118:Calcium; D003432:Cross-Linking Reagents / Q000494:pharmacology; D020285:Cryoelectron Microscopy; D005419:Flavonoids / Q000378:metabolism; D044645:Fucus / Q000187:drug effects / Q000378:metabolism*; D020723:Glucuronic Acid / Q000378:metabolism; D006603:Hexuronic Acids / Q000378:metabolism; D007700:Kinetics; D049329:Nanostructures; D010084:Oxidation-Reduction / Q000187:drug effects; D010636:Phenols / Q000378:metabolism; D011093:Polyethylene Terephthalates; D011108:Polymers / Q000378:metabolism; D059808:Polyphenols; D017680:Potassium Compounds / Q000494:pharmacology*; D011193:Potassium Iodide / Q000494:pharmacology*; D053838:Scattering, Small Angle; D033081:Shear Strength; D013499:Surface Properties / Q000187:drug effects; D013718:Tensile Strength; D014961:X-Ray Diffraction
D000269:Adhesives; D000464:Alginates; D001965:Bromides; D003432:Cross-Linking Reagents; D005419:Flavonoids; D006603:Hexuronic Acids; D010636:Phenols; D011093:Polyethylene Terephthalates; D011108:Polymers; D059808:Polyphenols; D017680:Potassium Compounds; D011193:Potassium Iodide; C025539:Lavsan; D020723:Glucuronic Acid; C039004:potassium bromide; D002118:Calcium