Interfacial Phenomena at the Surfaces of Critical Ionic Mixtures

临界离子混合物表面的界面现象

• 批准号: 9500827
• 负责人: Bruce Law
• 金额: $ 21万
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-01 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9500827&HistoricalAwards=false
• 关键词: Interfacial; Phenomena; Surfaces; Critical; Ionic

9500827 Law Ions in solution frequently form electrical double layers at surfaces which modify the surface phenomena of wetting and adsorption. These surface effects are important in many physical, chemical, and biological processes such as lubrication, catalysis, and fluid flow through biological membranes and porous media. This project will use the techniques of elllipsometry and neutron reflectometry to study wetting and adsorption in critical ionic mixtures. These mixtures are known to exhibit either mean field or Ising behavior in the bulk depending upon the dielectric properties of the solvent. This bulk behavior is still not understood from a theoretical point of view. The liquid/liquid and liquid/substrate surface properties of such mixtures have never been studied before and this project should enhance our understanding of the complex interaction between bulk and surface ionic processes %%% Ions in solution frequently adsorb at surfaces and modify the physical characteristics of the surface. This effect can be important in many physical, chemical, and biological membrane processes such as lubrication catalysis and fluid flow through biological membranes and porous media. The adsorption of ions is determined by the underlying properties of the bulk liquid solution. In this project, the surface properties of critical ionic mixtures will be studied, using light reflection and neutron reflection techniques, near the critical temperature where the bulk properties of these solutions vary rapidly with temperature. This proposal will enhance our understanding of the complex interplay between bulk and surface ionic processes. ***

9500827溶液中的离子经常在表面形成双电层，从而改变润湿和吸附的表面现象。 这些表面效应在许多物理，化学， 和生物过程，例如润滑、催化和流体流过生物膜和多孔介质。本计画将利用椭圆度计及中子反射计的技术来研究临界离子混合物中的润湿与吸附。已知这些混合物在本体中表现出平均场或伊辛行为，这取决于溶剂的介电性质。 从理论的角度来看，这种整体行为仍然没有得到理解。这种混合物的液体/液体和液体/基质表面性质以前从未被研究过，这个项目应该加强我们对本体和表面离子过程之间复杂相互作用的理解。溶液中的离子经常吸附在表面，并改变表面的物理特性。这种效应在许多物理、化学和生物膜过程中可能是重要的 等 如润滑催化和流体流过生物膜和多孔介质。离子的吸附由本体液体溶液的基本性质决定。在这个项目中，将使用光反射和中子反射技术研究临界离子混合物的表面性质，在临界温度附近，这些溶液的整体性质随温度迅速变化。这一建议将提高我们的理解之间的复杂的相互作用，体和表面离子的过程。 ***