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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Spherical and lamellar octadecylsilane hybrid silicas
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Spherical and lamellar octadecylsilane hybrid silicas

机译：球形和层状十八烷基硅烷杂化二氧化硅

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摘要

Silicas bearing different contents of octadecylsilane groups were synthesized by the sol-gel method and characterized by solid-state magic angle spin C-13 nuclear magnetic resonance spectroscopy, Raman spectroscopy, attenuated total reflectance infrared spectroscopy, small angle X-ray scattering, laser light scattering and atomic force microscopy. A structural model for such hybrid materials is proposed in which spherical or lamellar morphology, fern-like or Porod's structure, are proposed depending on the tetraethyl orthosilicate (TEOS)/octadecylsilane (ODS) molar ratio. The effect of the ODS addition time on the chain conformation and on the particle morphology and texture was also investigated. The degree of organization lowered as the amount of ODS increased. The nanostructured xerogel obtained in the case of pure TEOS evolutes from spherical to lamellar patterns, as the amount of octadecylsilane is increased.
机译：通过溶胶-凝胶法合成了具有不同十八烷基硅烷基含量的二氧化硅，并通过固态幻角自旋C-13核磁共振光谱，拉曼光谱，衰减全反射红外光谱，小角度X射线散射，激光进行了表征散射和原子力显微镜。提出了用于这种杂化材料的结构模型，其中根据原硅酸四乙酯（TEOS）/十八烷基硅烷（ODS）的摩尔比提出了球形或层状形态，类蕨或Porod结构。还研究了ODS添加时间对链构象以及颗粒形态和织构的影响。组织程度随着消耗臭氧层物质数量的增加而降低。当十八烷基硅烷的量增加时，在纯TEOS的情况下获得的纳米结构干凝胶从球形变成层状。

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