CAREER: Relating Micellar Structure to Aggregate Properties in Polymerization of Wormlike Micelles

职业：将胶束结构与蠕虫状胶束聚合中的聚集体特性联系起来

• 批准号: 0092967
• 负责人: Lynn Walker
• 金额: $ 37.5万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-15 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0092967&HistoricalAwards=false
• 关键词: CAREER; Relating; Micellar; Structure; Aggregate

ABSTRACTCTS-0092967Carnegie-MellonLynnm WalkerI have three career goals; to develop an active research program aimed at answering fundamental questions about the dynamics of complex fluids and the influence of those dynamics on macroscopic phenomena, to develop a strong complex fluid rheology and polymer processing component in the chemical engineering curriculum at Carnegie Mellon, and to develop strong links between local industry and the undergraduate and graduate programs in an effort to expose students to the types of problems faced by the polymer processing and complex fluids industries. Carnegie Mellon provides an optimal environment for me to develop these research and education goals through its variety ofinterdisciplinary research and education programs. I provide the rheology expertise to the Center for Complex Fluid Engineering (CFE) research center and Colloids, Polymers and Surfaces (CPS) education program.In this proposal, an exciting extension of current work on micelle dynamics in my research group to the polymerization of wormlike surfactant assemblies is outlined. The polymerization of counterions condensed on the surface of wormlike micelles (or surfactant aggregates) offers a novel approach to the formation of anisotropic nano-particles in solution. These cylindrical particles have radii of a few nanometers and lengths ranging from a few to hundreds of nanometers. The amphiphilic nature of these polyelectrolyte-surfactant aggregates allows them to solubilize hydrophobic compounds into aqueous media. This property is vital for applications in detergency, drug delivery, separations and water purification. The novel feature arising from the length of these anisotropic particles is that they have the potential to act as rheological modifiers, be cross-linked to form amphiphilic gels and to form liquid crystalline or higher order phases when concentrated. None of these potential applications can be realized without the ability to control the morphology of the nanoparticles through reaction. The hypothesis that drives the proposed research is that that counterion composition can be used to control the structure of wormlike micelle solutions and that control can be utilized to generate novel high aspect ratio polymer-surfactant aggregates through polymerization of counterions. The goal is a quantitative understanding of the relationship between counterion composition of wormlike micelle systems and properties of the polymerized aggregates. Secondary goals of the research are investigations of the feasibility of controlling polyelectrolyte structure and ionomeric copolymer composition using this mechanism and the development of a series of novel charged, anisotropic nanoparticles for colloidal and structural studies.Carnegie Mellon is clearly committed to excellence in education and I strive to continue that trend. In all courses, I stress the application of fundamentals to modern engineering problems and expose students to the computational tools necessary to enter into the chemical engineering field. A specific educational goal is to utilize my background in complex fluid rheology and polymer processing to fill that gap in the curriculum. I am incorporating polymer processing and rheology into the curriculum through undergraduate laboratory modules, development of advanced courses and undergraduate research . I am exposing undergraduate chemical engineering students to industrial polymer processing through industrial links for the laboratory modules and, in my own laboratory, through industry-driven undergraduate research projects.

Abstractcts-0092967 Carnegie-Mellonlynnnm Walkeri有三个职业目标； to develop an active research program aimed at answering fundamental questions about the dynamics of complex fluids and the influence of those dynamics on macroscopic phenomena, to develop a strong complex fluid rheology and polymer processing component in the chemical engineering curriculum at Carnegie Mellon, and to develop strong links between local industry and the undergraduate and graduate programs in an effort to expose students to the types of problems faced by the polymer processing and复杂的流体行业。 卡内基·梅隆（Carnegie Mellon）为我提供了一个最佳的环境，以通过其各种学科研究和教育计划来发展这些研究和教育目标。 我为复杂流体工程中心（CFE）研究中心以及胶体，聚合物和表面（CPS）教育计划提供了流变学专业知识。在此提案中，我的研究小组中目前关于胶束动态的工作令人兴奋地扩展到蠕虫状表面活性剂组件的聚合。 在虫状胶束表面（或表面活性剂骨料）表面凝结的反子的聚合为溶液中各向异性纳米粒子形成提供了一种新颖的方法。 这些圆柱颗粒的半径为几纳米，长度从几个到数百纳米不等。 这些聚电解质表面表面活性剂聚集体的两亲性质使它们能够将疏水化合物溶解为水培养基。 该特性对于在洗涤剂，药物输送，分离和水净化中的应用至关重要。这些各向异性颗粒的长度引起的新颖特征是它们具有作为流变学修饰符的潜力，可以交联以形成两亲性凝胶，并在浓缩时形成液晶或高阶相。 没有能力通过反应控制纳米颗粒的形态，这些潜在的应用都无法实现。 驱动拟议研究的假设是，抗衡离子组成可用于控制蠕虫状的胶束溶液的结构，并且可以利用控制来通过聚合来产生新型的高纵横比聚合物 - 表面表面活性剂聚集体。 目的是对虫状胶束系统的反子组成与聚合聚集体的性质之间的关系进行定量理解。 该研究的次要目标是对使用这种机制控制聚电解质结构和离子聚合物共聚物组成的可行性的研究，以及开发一系列新型充电的各向异性纳米颗粒，用于胶体和结构研究。卡内基梅隆显然致力于教育和我卓越的教育，以继续这种趋势。在所有课程中，我都强调将基本原理应用于现代工程问题，并使学生接触进入化学工程领域所需的计算工具。 一个具体的教育目标是利用我的背景来进行复杂的流体流变和聚合物处理，以填补课程中的空白。 我将聚合物加工和流变学通过本科实验室模块，开发高级课程和本科研究纳入课程。 我正在通过实验室模块的工业链接以及在我自己的实验室中通过行业驱动的本科研究项目，将大学化学工程专业的学生暴露于工业聚合物处理中。