Chemical Reactions On and With Surfaces

这个项目是在一般地区的分析和表面 化学和化学修饰的子领域 表面。 这项研究工作的主要目的是 详细研究化学反应， 二氧化硅的表面可以用硅烷进行化学调整， 生产广泛科学的产品和工艺， 技术和工业重要性。 其中包括 色谱固定相，用于高效分离 化学和生物技术制造产品，以及 催化剂用于经济和能量上有利的 材料的合成和加工。 研究战略将首先集中在溶液化学 用于表面改性的烷氧基硅烷 流程. 本文研究了聚乙烯醇的物理吸附热力学和动力学 这些在二氧化硅上的烷氧基硅烷然后将通过 热化学和色谱技术来阐明 这种“反应前遭遇”在整个表面上的作用 修改过程 反应的程度 具有二氧化硅表面的烷氧基硅烷可以被催化， 溶液/固体或气体/固体反应体系，然后将被 探讨了 最后，将利用这些研究的结果 开发动态计算机模型， 可以更充分地理解二氧化硅表面的改性， 其中对于所需表面的最佳反应条件 可以预测改性过程。

This project is in the general area of analytical and surface chemistry and in the subfield of chemical modification of surfaces. The primary thrust of this research effort is to investigate in detail the chemical reactions by which the surfaces of silica can be chemically tailored with silanes to produce products and processes of broad scientific, technological, and industrial importance. Among these are chromatographic stationary phases for the efficient separation of products in chemical and biotechnological manufacture, and catalysts for the economically and energetically favorable synthesis and processing of materials. The research strategy will focus first on the solution chemistry of the alkoxysilanes that are used in surface modification processes. The thermodynamics and kinetics of physisorption of these alkoxysilanes on silica will then be studied by thermochemical and chromatographic techniques to elucidate the role of such "pre-reaction encounters" in the overall sueface modification process. The extent to which the reactions of alkoxysilanes with silica surfaces can be catalyzed, either as solution/solid or as gas/solid reaction systems, will then be explored. Finally, the results of these studies will be utilized to develop dynamic computer models with which the silane modification of silica surfaces can be more fully understood and with which optimal reaction conditions for desired surface modification processes can be predicted.