A Simple Preparation of Photoactive Glass Surfaces Allowing Coatings via the “Grafting-from” Method

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• 作者：Marco Sangermano ; Monica Periolatto ; Micaela Castellino ; Jieping Wang ; Kurt Dietliker ; Joëlle Levalois Grützmacher ; Hansjörg Grützmacher
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：August 3, 2016
• 年：2016
• 卷：8
• 期：30
• 页码：19764-19771
• 全文大小：438K
• 年卷期：0
• ISSN：1944-8252

文摘

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 TMESI²-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.