Hydrothermal Stability in Mesostructured Silica/Surfactant Composites: The Role of Kinetic Barriers

介孔二氧化硅/表面活性剂复合材料的水热稳定性：动力学势垒的作用

• 批准号: 9805254
• 负责人: Sarah Tolbert
• 金额: $ 4万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-01 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9805254&HistoricalAwards=false
• 关键词: Hydrothermal; Stability; Mesostructured; Silica; Surfactant

This starter grant award of the Chemistry Division to the University of California at Los Angeles supports the research of Professor Sarah Tolbert. The theme of the research is the study of kinetic factors controlling stability in ordered silica/surfactant mesostructured composites under hydrothermal conditions. These new materials consist of an organized organic component, which controls long-range periodicity, and an inorganic framework, which provides stability and strength. If the organic component is removed, phase transitions in the ordered mesoporous material produced can be followed in real time to gain insight into the kinetic factors controlling structure to reveal the interplay between organic packing constraints and the rigid inorganic silica framework. Real-time X-ray scattering and solid-state NMR spectroscopy are used to follow both structural change and silica framework condensation. The results of the experiments in this project will provide information that can be directly used in new syntheses of silica/surfactant composites. The ultimate goal of this work is to learn how to form new composite or mesoporous structures for specific applications, such as catalysis or chemical sensors.

加州大学洛杉矶分校化学系的启动资金支持莎拉·托尔伯特教授的研究。 该研究的主题是研究水热条件下控制有序二氧化硅/表面活性剂介观结构复合材料稳定性的动力学因素。 这些新材料由控制长程周期性的有组织的有机成分和提供稳定性和强度的无机框架组成。 如果去除有机成分，则可以实时跟踪所产生的有序介孔材料中的相变，以深入了解控制结构的动力学因素，从而揭示有机填充约束与刚性无机二氧化硅框架之间的相互作用。 实时 X 射线散射和固态核磁共振波谱用于跟踪结构变化和二氧化硅骨架缩合。 该项目的实验结果将提供可直接用于二氧化硅/表面活性剂复合材料的新合成的信息。 这项工作的最终目标是学习如何为特定应用（例如催化或化学传感器）形成新的复合材料或介孔结构。