Microstructure and Transport-Selectivity Properties of Ion Exchange Polymers

该项目在分析和表面化学的一般领域，以及通过离子交换聚合物膜的质量传输的子领域。离子交换聚合物表现出局部短程有序(5~100纳米)的不同微观结构，通过热加工以及在聚碳酸酯薄膜和乳胶球等微结构底物上的吸附将被诱导。聚合物层的微观结构将通过红外和X射线光谱进行评估，其传输选择性将通过电化学方法进行测定。将为这些特性之间的关系建立数学模型。离子交换膜的质量传输及其通过静电效应的增强是一个重要的科学和技术领域，对生物系统具有重要意义。描述其传输特性的广义关系的发展将有助于特定应用的分离器的优化，具有控制所选物种传输的微结构基质中的活性中心的催化剂的设计，以及用于电化学催化和分析的修饰电极的制造。

This project is in the general area of analytical and surface chemistry and in the subfield of mass transport through ion exchange polymer films. Different microstructures of ion exchange polymers, which exhibit local short range order (5 to 100 nanometers), will be induced through thermal processing as well as by sorption in microstructured substrates such as polycarbonate membranes and latex spheres. The microstructure of the polymer layer will be evaluated by infrared and X-ray spectroscopies and its transport-selectivity determined by electrochemical methods. Mathematical models will be developed for the relationships between these properties. Mass transport through ion exchange membranes and its enhancement through electrostatic effects is an important field both scientifically and technologically, with implications for biological systems. Development of generalized relationships describing their transport characteristics will facilitate optimization of separators for specific applications, design of catalysts with active sites situated in microstructured matrices that control the transport of selected species, and fabrication of modified electrodes for electrochemical catalysis and analysis.