Control and Modification of Primary and Secondary Self-Assembly Processes

初级和次级自组装过程的控制和修改

基本信息

批准号：
9814399
负责人：
Eric Kaler
金额：
$ 32.82万
依托单位：
University of Delaware
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1998
资助国家：
美国
起止时间：
1998-11-15 至 2002-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814399&HistoricalAwards=false
关键词：
Control Modification Primary Secondary Self

项目摘要

ABSTRACTCTS-9814399U. DelawareIt is proposed to use, electron microscopy, light, X-ray and neutron scattering, and other measurements to discover and characterize a menagerie of novel microstructures in synthetic and biological mixed surfactant systems. These structures offer excellent opportunities to: (1) enlarge the realm of surfactant solution microstructure from the limits of simple micelles and lamellar phases to include equilibrium vesicles and gels, (2) quantitiatively test theories of surfactant self-assembly, and (3) allow the development of new materials with important scientific and technological applications. This to date has led to the hypothesis that mixing micelle forming, single-tailed anionic and cationic surfactants lead to mixed bilayers with low bending constants; these low bilayer bending constants are then responsible for the observed structures and phase behavior. The work under this proposal is designed to (1) directly test this hypothesis by measuring elastic constants as a function of composition and (2) develop new materials based on low ending modulus bilayers such as polymer-surfactant gels. The idea that novel properties emerge from the exchange of fluorocarbon for hydrocarbon surfactant in catanionic mixtures will be explored. These assemblies will be used to guide synthesis of higher order structures. Work in this area will explore synthesis of controlled permeability vesicles by polymerization of catanionic vesicles.

Abstractcts-9814399U。提议使用特拉华州使用电子显微镜，光，X射线和中子散射，以及其他测量值，以发现和表征合成和生物混合表面活性剂系统中新型微观结构的menagerie。这些结构为以下结构提供了极好的机会：（1）从简单的胶束和层状相的极限中扩大表面活性剂溶液微观结构的领域，以包括平衡囊泡和凝胶，（2）定量测试表面活性剂自组装理论，并且（3）允许（3）（3）（3）开发具有重要科学和技术应用的新材料。迄今为止，这导致了一个假设，即混合形成的，单尾的阴离子和阳离子表面活性剂导致混合双层弯曲常数。然后，这些低双层弯曲常数负责观察到的结构和相行为。该提案下的工作旨在通过（1）通过测量弹性常数作为组成的函数来直接检验该假设，并且（2）基于低端模量双层（例如聚合物表面表面活性剂凝胶）开发新材料。将探索从氟化合物在catanionic混合物中氟化合物交换中出现新的特性的想法。这些组件将用于指导高阶结构的合成。该领域的工作将通过伴有速气囊泡的聚合来探索受控渗透囊泡的合成。