title: Reversible Tethering of Polymers onto Catechol-Based Titanium Platforms.
abstract: In this article, we report on the reversible tethering of end-functionalized polymers onto catechol-based titanium platforms by exploiting the reversible Diels-Alder (DA) cycloaddition reaction. For this purpose, furan and maleimide end-functionalized polymers, prepared via reversible addition-fragmentation chain transfer polymerization, were covalently grafted through a DA reaction onto reactive titanium platforms elaborated from catechol-based anchors incorporating either the furan or the maleimide moiety. As a proof of concept, a hydrophilic poly(oligo(ethylene glycol)acrylate) (POEGA) and a hydrophobic poly(2,2,2-trifluoroethyl acrylate) (PTFEA) were grafted onto titanium surfaces and subsequently detached by exploiting the thermoreversible nature of the DA reaction [i.e., retro Diels-Alder (rDA)]. These polymers were interchanged by performing a second DA reaction, thereby allowing the titanium surface wettability to be switched from hydrophobic to hydrophilic on demand. The grafting of furan/maleimide end-functionalized polymers onto functionalized (maleimide/furan, respectively) catechol-based titanium platforms and the subsequent rDA/DA sequence used for switching the titanium surface were evidenced by attenuated total reflectance-Fourier transform-infrared spectroscopy, X-ray photoelectron spectroscopy, and contact angle measurements.
authors.affiliation: Université Lille, UMR 8207-UMET-Unité Matériaux et Transformations , F-59000 Lille, France.
authors.forename: William
authors.initials: W
authors.lastname: Laure
authors.affiliation: Université Lille, UMR 8207-UMET-Unité Matériaux et Transformations , F-59000 Lille, France.
authors.forename: David
authors.identifier: 0000-0002-6791-6131
authors.initials: D
authors.lastname: Fournier
authors.affiliation: Université Lille, UMR 8207-UMET-Unité Matériaux et Transformations , F-59000 Lille, France.|ENSCL , F-59000 Lille, France.
authors.forename: Patrice
authors.identifier: 0000-0001-5860-5107
authors.initials: P
authors.lastname: Woisel
authors.affiliation: Université Lille, UMR 8207-UMET-Unité Matériaux et Transformations , F-59000 Lille, France.
authors.forename: Joël
authors.identifier: 0000-0003-2990-2561
authors.initials: J
authors.lastname: Lyskawa