title: A Simple Preparation of Photoactive Glass Surfaces Allowing Coatings via the "Grafting-from" Method.
abstract: A simple and straightforward synthesis was developed to prepare the siloxy-substituted bis(acylphosphane)oxide 4-(trimethoxysilyl)butyl-3-[bis(2,4,6-trimethylbenzoyl)phosphinoyl]-2-methyl-propionate TMESI(2)-BAPO. This new photoinitiator was successfully fixed to glass surfaces. Subsequent irradiation with UV light in the presence of either a partially fluorinated acrylate or a specifically synthesized polysiloxane containing polymerizable acrylate functions allowed the generation of polymer chains which grew from the surface in an efficient radical polymerization process ("grafting-from" procedure). Durable hydrophobic surfaces were prepared which have contact angles between 93° and 95°. The silanization process with the photoinitiator and the grafting process were followed and analyzed with various techniques including high-resolution X-ray photoelectron spectroscopy.
authors.affiliation: Politecnico di Torino , Dipartimento di Scienza Applicata e Tecnologia, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Sangermano
authors.affiliation: Politecnico di Torino , Dipartimento di Scienza Applicata e Tecnologia, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.
authors.forename: Monica
authors.initials: M
authors.lastname: Periolatto
authors.affiliation: Center for Sustainable Futures - CSF@Polito, Istituto Italiano di Tecnologia , Corso Trento 21, 10129 Torino, Italy.
authors.forename: Micaela
authors.initials: M
authors.lastname: Castellino
authors.affiliation: Department of Chemistry and Biosciences, ETH Zürich , 8093 Zürich, Switzerland.
authors.forename: Jieping
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Chemistry and Biosciences, ETH Zürich , 8093 Zürich, Switzerland.
authors.forename: Kurt
authors.initials: K
authors.lastname: Dietliker
authors.affiliation: Department of Chemistry and Biosciences, ETH Zürich , 8093 Zürich, Switzerland.|Université Antilles Guyane , BP 250, 97157 Pointe à Pitre Cédex, Guadeloupe, France.
authors.forename: Joëlle Levalois
authors.initials: JL
authors.lastname: Grützmacher
authors.affiliation: Department of Chemistry and Biosciences, ETH Zürich , 8093 Zürich, Switzerland.|Lehn Institute of Functional Materials (LIFM), Sun Yat-Sen University , 510275 Guangzhou, China.
authors.forename: Hansjörg
authors.initials: H
authors.lastname: Grützmacher
keywords: glass functionalization; photopolymerization; surface grafting