Siloxane polymers are widely used in commercial products due to their versatility, stability, and low cost. When chemically bonded with metals, they generate hydrophobic surfaces, applicable for water-repellent coatings. While several studies have utilized functionalized silicones, there is limited research on siloxane-containing inorganic-organic “hybrid” polymers and their potential as chemically resistant, hydrophobic interfaces. In this research, fourteen “hybrid” siloxane polymers were prepared from divinyl-terminated compounds and hydridosiloxanes using a one-pot process. Results from infrared spectroscopy (IR) established that the polymers were successfully synthesized; all contained characteristics of both siloxanes and organic polymers. Each polymer, along with two commercially available polymers, was reacted with the surface of silicon wafers. Thickness and contact angle measurements revealed that all sixteen polymers reacted with wafers, resulting in unique properties depending on the chemical groups present in the polymers. The acid-resistance of these “hybrid” polymers was examined by submerging samples in hydrochloric acid solutions. In comparison to traditional siloxane polymers, these “hybrid” polymers showed a smaller change in surface properties. Overall, fourteen novel polymers were fabricated and were reacted with silica wafers to fabricate hydrophobic surfaces. They are viable candidates commercial use as various water-repellent, anticorrosive, and UV-resistant surfaces. Our polymer coatings demonstrated increased stability when submerged in HCl solutions, demonstrating potential as hydrophobic modifiers for use in extreme conditions.<br/>

Hydrophobization and acid resistance of silica surfaces through reaction with alternating carbosiloxane polymers

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.