Translocation and diffusion of polyelectrolytes and electronic conduction in polyelectrolyte systems

聚电解质的易位和扩散以及聚电解质体系中的电子传导

• 批准号: 1504265
• 负责人: Murugappan Muthukumar
• 金额: $ 45万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1504265&HistoricalAwards=false
• 关键词: Translocation; diffusion; polyelectrolytes; electronic; conduction

NON-TECHNICAL:When certain numbers of charged ions, dispersed in a salty solution, are connected together in a chain-like fashion, the system exhibits tantalizing properties with additional tuning of chemistry of reactions. Examples of use of these materials include super-absorbancy of water in diapers, targeted delivery of large macromolecules such as genes using synthetic platforms, guided transport of charged macromolecules through nano-fluidic devices, and high electronic conductivity of polyelectrolyte films formulated from water-based solutions. Despite the high importance of charged polymers in today's materials world, fundamental understanding is limited. The difficulty arises from several long-range forces acting on the molecules simultaneously so that each molecule feels the presence of almost every other molecule in the system. The Principal Investigator proposes to bring a combination of experiments on carefully chosen model systems, computer modeling, and advanced theoretical methods to address several interrelated transport properties of polyelectrolyte systems. The project offers societal impact in terms of fundamental scientific understanding of advanced materials of broad technological relevance and use. One of the major components of the proposed research is to train the next generation of scientific leaders in this area so as to meet the growing global challenges and societal needs.TECHNICAL:Experiments and development of new theories are proposed for polyelectrolyte dynamics, polyelectrolyte gel dynamics, and electrical conduction in polyelectrolyte systems, by combining single molecule electrophoresis, light scattering, rheology, statistical mechanics, field theory, and several simulation techniques. Several polyelectrolyte transport phenomena will be studied. Specifically, the project addresses (a) translocation of synthetic branched polyelectrolytes, (b) polyelectrolyte gel dynamics and diffusion of polyelectrolytes in polyelectrolyte gels, and (c) electronic conduction in polyelectrolyte systems. This project is aimed at building a new separation technique for polyelectrolytes with different architectures, and discovering new conceptual models for polyelectrolyte transport and electron transport in polyelectrolyte systems. The results of this research will have impact in numerous applied areas such as super-water absorbent goods, separation science, molecular sieves for separation techniques, drug delivery platforms, organic photovoltaic devices, organic light-emitting diodes, radio frequency identification tags, and antistatic coatings. Training of graduate students in this research area is the primary educational component of the proposed activity.

非技术性：当某些电荷离子分散在咸溶液中时，以类似链式的方式将其连接在一起时，该系统表现出诱人的特性，并进行了其他反应化学调整。这些材料使用的示例包括尿布中水的超吸收性，使用合成平台的大型大分子（例如基因）的有针对性传递，通过纳米富集设备的带电的大分子传输，以及从水基溶液中制成的聚电解质膜的高电子电导率。尽管电荷聚合物在当今的材料世界中具有很高的重要性，但基本的理解是有限的。难度来自同时作用于分子上的几个远程力，因此每个分子都会感觉到系统中几乎所有其他分子的存在。主要研究者建议在精心选择的模型系统，计算机建模和高级理论方法上结合实验，以解决多电解质系统的几种相互关联的传输特性。该项目就对广泛技术相关性和使用的先进材料的基本科学理解提供了社会影响。 One of the major components of the proposed research is to train the next generation of scientific leaders in this area so as to meet the growing global challenges and societal needs.TECHNICAL:Experiments and development of new theories are proposed for polyelectrolyte dynamics, polyelectrolyte gel dynamics, and electrical conduction in polyelectrolyte systems, by combining single molecule electrophoresis, light scattering, rheology, statistical mechanics,现场理论和几种模拟技术。 将研究几种聚电解质转运现象。具体而言，该项目解决了（a）合成支枝聚电解质的易位，（b）聚电解质凝胶动力学和聚电解质中聚电解质凝胶中的聚电解质凝胶动力学和（c）在聚电解质系统中的电子传导。该项目旨在为具有不同架构的聚电解质建立一种新的分离技术，并在聚电解质系统中发现新的聚电解质传输和电子传输的概念模型。这项研究的结果将在众多应用领域产生影响，例如超水吸收商品，分离科学，分离技术的分子筛，药物输送平台，有机光伏设备，有机光线发射二极管，射频频率识别标签和抗固定涂层。该研究领域的研究生培训是拟议活动的主要教育组成部分。