Synthesis and Characterization of Hybrid Materials Consisting of n-octadecyltriethoxysilane by Using n-Hexadecylamine as Surfactant and Q0 and T0 Cross-Linkers

Abstract

Novel hybrid xerogel materials were synthesized by a sol-gel procedure. <em>n</em><em>-</em>octadecyltriethoxysilane was co-condensed with and without different cross-linkers using <strong>Q⁰</strong> and <strong>T⁰</strong> mono-functionalized organosilanes in the presence of <em>n</em>-hexadecylamine with different hydroxyl silica functional groups at the surface. These polymer networks have shown new properties, for example, a high degree of cross-linking and hydrolysis. Two different synthesis steps were carried out: simple self-assembly followed by sol-gel transition and precipitation of homogenous sols. Due to the lack of solubility of these materials, the compositions of the new materials were determined by infrared spectroscopy, ¹³C and ²⁹Si CP/MAS NMR spectroscopy and scanning electron microscopy.<strong></strong>

Keywords

• sol-gel
• solid state NMR
• cross-linkers
• stationary phases