Reactions of siloxane polymers and monomers with inorganic oxide surfaces have become increasingly prominent over the last several years with the growing acceptance that the siloxane bond can serve as a reactive, functional group. However, while these reagents create well-characterized low-hysteresis surfaces, they do not provide further opportunities for additional modification or tailoring of the surface properties. Poly(hydridomethylsiloxane)s (PHMS), however, have been shown to react with a wide variety of inorganic oxide surfaces, while possessing the hydridosilane groups which create the potential for further modifications. Herein, we describe the preparation of PHMS-modified silica and titania surfaces, along with subsequent modifications of these interfaces via platinum-catalyzed hydrosilylation reactions. Resulting surfaces are characterized by contact angle goniometry, ellipsometry and x-ray photoelectron spectroscopy (XPS) and show the presence of additional functional groups, such as amines, perfluoroalkanes, and carboxylic acids. This technique has been applied to produce surfaces featuring both hydrophobic and hydrophilic groups which have a profound effect on wettability.

Modification of inorganic oxides with poly(hydridomethyl)siloxanes as a scaffold for mixed functional surfaces

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.