Semiquantitative Solid-State NMR Study of the Adsorption of Soybean Oils on Silica and Its Significance for Rubber Processing

Soybean oil (SBO) is a renewable material used as an alternative to conventional petroleum-derived oils in the processing of rubber composites. Upon chemical modifications, such epoxidation, its performance can be significantly improved, indicated by considerable reduction mixing energy. Although it has been hypothesized that hydrogen bonding between functional groups (e.g., epoxy) SBOs and silanols present on silica surface plays key role, there still lack direct evidence supporting this hypothesis. In work, demonstrated overall correlation epoxy concentration energy, consistent with long-held particular, SBO–silica adsorption affinity degree epoxidation revealed set surface-selective solid-state nuclear magnetic resonance (ssNMR) experiments. addition, ssNMR technique work could also evaluate other and/or additives more broadly.