Quantification of Silanol Species on Various Silicas by IR Spectroscopy
Résumé
Quantification of Silanol Species on Various Silicas by IR Spectroscopy Silica plays a crucial role in the development of Michelin's 'green tyres', which are designed to be more fuel efficient, environmentally friendly, and durable. It is an essential component that reacts with silane, a coupling agent, to significantly improve the tyre's performance. The success of this reaction depends on a thorough understanding of the surface chemistry of silica, in particular the presence of silanol (Si-OH) groups. Silanol groups play an essential role in facilitating chemical bonds between silica, silane, and the tyre polymer matrix. In this study, we embark on a mission to explore the surface reactivity of five distinct silica using in situ Fourier transform infrared (FTIR) spectroscopy, following the methodology established by Gallas et al. Beyond qualitative insights, our effort involves quantitative analyses of the surface silanols as a whole, and then of each silanol groups individually. By understanding the reactivity, abundance, and spectral characteristics of these silanol groups, we aim to improve tyre performance by exploiting the full potential of silica-silane interactions.
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