Novel Solution Microstructures by "Physcial Synthesis"

“物理合成”的新型解决方案微观结构

基本信息

批准号：
9319447
负责人：
Eric Kaler
金额：
$ 27.45万
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：
1994
资助国家：
美国
起止时间：
1994-08-01 至 1998-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9319447&HistoricalAwards=false
关键词：
Novel Solution Microstructures Physcial Synthesis

项目摘要

9319447 Kaler In the first two-year research period, electron microscopy, light, X-ray and neutron scattering, time resolved fluorescence quenching, and NM self-diffusion measurements were used to discover and chartreuse a menagerie of novel microstructures in synthetic and biological surfactant systems. The key to enlarging the realm of surfactant solution microstructure (from the limits of simple micelles and lamellar phases) has been the "physical synthesis" of new materials by mixing surfactants to achieve a desired set of properties. This has been most clearly the demonstrated in the catanionic vesicle systems we discovered and investigated during the first research period. The cationic surfactant cetyl trimethylammonium tosylate (CTAT) and the anionic surfactant sodium dodecylbenzene sulfonate (SDBS) associate in solution to form a quasi-double-tailed surfactant that forms bilayers rather than micelles. The bilayers of the catanionic mixture have different properties than do covalently bound zwitterionic double-tailed surfactants; the catanionic mixture forms unilamellar vesicles while the covalent zwitterionic surfactants form multilamellar phases. It is hypothesized that new microstructures are produces in mixtures because the intermolecular and interaggregate forces are altered in ways impossible in single component surfactant solutions. In this renewal, experimental and theoretical efforts are used to design new microstructures of mixed surfactant systems by understanding how the components of the surfactant mixtures alter the intermolecular and inter-aggregate forces. ***

9319447 KALER在第一个两年的研究期间，电子显微镜，光，X射线和中子散射，时间分辨的荧光淬灭以及NM自扩散测量被用于发现和呈现合成和生物表面活性剂中新型微观结构的杂物系统。扩大表面活性剂溶液微观结构领域的关键（从简单胶束和层状相的极限）一直是新材料的“物理合成”，通过混合表面活性剂以实现所需的特性。这是我们在第一个研究期间发现和研究的catanionic囊泡系统中最清楚的。阳离子表面活性剂丁基甲基酸酯（CTAT）和阴离子表面活性剂十二烷基苯甲酸钠磺酸盐（SDBS）在溶液中辅助，以形成一种准双尾表面活性剂，形成形成双层而不是蛋白酶的准双尾表面活性剂。与共价结合的zwitterion双尾表面活性剂相比，稳定混合物的双层具有不同的特性。 catanionic混合物形成单层囊泡，而共价性表面活性剂形成多层相。假设新的微观结构是在混合物中产生的，因为在单个组件表面活性剂溶液中不可能以不可能的方式改变了分子间和聚集的力。在这种续订中，通过了解表面活性剂混合物的组件如何改变分子间和聚集力来设计混合表面活性剂系统的新微观结构。 ***