Over the last several years, reactions between siloxane polymers or monomers with inorganic oxide surfaces have become more prominent, owing to the increasing acceptance of the siloxane bond as a functional, reactive group. However, while these reagents create excellent low hysteresis surfaces, they do not provide for further functionalization. Poly(hydridomethylsiloxane)s (PHMS), on the other hand, react readily with a wide variety of inorganic oxide surfaces while providing a scaffold for subsequent functionalization. Herein, we discuss the preparation of PHMS-modified silica surfaces. Reaction conditions show a significant influence on the resulting surface, with temperature dependence on the dominant  reaction mechanism. These PHMS surfaces also exhibits low contact angle hysteresis, but can be further modified through cross-coupling reactions, such as hydrosilylation, to create more advanced monolayers. Surfaces are examined via dynamic contact angles, ellipsometry, and x-ray photoelectron spectroscopy (XPS) to show changes in the surface chemistry with subsequent modifications, and their effects on wettability.

Modification of Inorganic Oxides with Poly(hydridomethyl)siloxanes as an Approach to Mixed Functional Surfaces

2019 Spring National Meeting

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