Directed Ionic Transport in Poly(Ionic Liquid)-Grafted Nanoparticles in Polarizable Media

第一部分：非技术总结该项目旨在开发可持续材料，以实现其在溶液中的离子传输特性，这对于水处理膜应用以及能源应用电解质非常重要。 PI的目的是研究纳米粒子的纳米动力学，运输和离子介质中的结构行为与附着的水和聚（离子液体）分子。离子液体和电解质分子链的极化的概念将被调查，它可以找到磁性磁性杂化材料的变革用途。聚电解质的分子构象行为以及基于聚离子液体的共聚物接枝纳米粒子的离子传输及其形态将决定膜的传输效率。PI计划在本科阶段的化学工程课程中使用项目成果，并将与高中科学教师合作，帮助纳米技术课程的开发。多方面的教育方法将包括虚拟纳米科学教育工作者研讨会。第二部分：技术概述聚电解质和聚（离子液体）具有强的离子结合和离子传输性质，可以表现出可切换的响应，这使它们成为易于再生的可持续膜的理想候选物;类似地，聚电解质具有增强的耐久性和离子传输。本计画旨在探讨分子的氢键及极化对电解质的构象及取向的影响，不论电解质是作为溶剂或是聚合物链。在聚电解质接枝粒子的网络形成领域将使用流变学和小角中子散射实验检查。聚电解质与溶剂介质之间的相互作用将决定其溶剂化状态、离子传输、导电性、粘弹性能和链的极化。此外，氢之间的相互作用的非导电聚合物，聚（甲基丙烯酸甲酯），和咪唑基离子液体将通过拉曼和核磁共振光谱技术进行验证，并与聚合物接枝粒子的离子液体的极化将通过原位TEM实验进行研究。将合成基于咪唑的聚（离子液体）（PIL）接枝粒子，并探索它们与离子液体介质的相互作用以了解离子导电性。制备了两种具有不同PIL嵌段的共聚物接枝纳米粒子，并研究了其在离子液体中的离子导电机理。最终，形态学研究将与电导率相关。本研究的主要目的是探讨纳米聚电解质在溶液中的氢相互作用诱导和极化结构。该研究计划将支持聚合物和离子液体介质的基本取向机制，并将帮助我们了解竞争因素以及它们如何通过纳米级相互作用影响离子传输特性。该奖项反映了NSF的法定使命，并被认为是值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估的支持。

PART 1: NON-TECHNICAL SUMMARYThis project aims to develop sustainable materials for their ion transport properties in solutions, which is important for membrane applications for water treatment, as well as electrolytes for energy applications. The PI aims to investigate the nanoscale dynamics, transport, and structural behavior in ionic media of nanoparticles with attached polyelectrolyte and poly(ionic liquid) molecules. The concept of polarization of the ionic liquids and electrolyte molecular chains will be investigated; it can find transformative uses for magnetic polyelectrolyte hybrids. The molecular conformational behavior of polyelectrolytes as well as ionic transport in poly(ionic liquid)-based copolymer-grafted nanoparticles and their morphologies will determine the transport efficiency of the membranes. The PI plans to use the project deliverables in undergraduate level chemical engineering courses and will also work with high school science teachers to help course development on nanotechnology. Multifaceted educational approaches will include virtual nanoscience educator workshops. PART 2: TECHNICAL SUMMARYPolyelectrolytes and poly(ionic liquids), possessing strong ion binding and ion transport properties, can exhibit switchable responses which make them ideal candidates for sustainable membranes with easy regeneration; similarly, polyelectrolytes with enhanced durability and ion transport. This project aims to investigate the role of hydrogen-bonding and polarization of molecules on the conformations and orientations of electrolytes, either as solvent medium or as polymer chains. Network formation in polyelectrolyte-grafted particles under fields will be examined using rheology and small-angle neutron scattering experiments. Interactions between the polyelectrolytes and the solvent media will determine the solvation state, ion transport, conductivity, viscoelastic properties and the polarization of chains. In addition, hydrogen interactions between non-conductive polymer, poly(methyl methacrylate), and imidazolium-based ionic liquid will be verified by Raman and nuclear magnetic resonance spectroscopic techniques, and the polarization of ionic liquids with the polymer-grafted particles will be studied through in-situ TEM experiments. Imidazolium based poly(ionic liquid) (PIL)-grafted particles will be synthesized and their interactions with the ionic liquid medium will be explored to understand ionic conductivity. Two copolymer-grafted nanoparticles with different PIL blocks will be prepared and the ion conduction mechanism in ionic liquid will be investigated. Ultimately, the morphological study will be correlated to the conductivity. The overall aim of the proposed research is to explore the hydrogen interaction-induced and polarized structures of nanoparticle-based polyelectrolytes in solutions. The research plan will underpin the fundamental mechanism of orientations both for the polymer and for the ionic liquid media and will help us understand competing factors and how they influence the ion transport properties through nanoscale interactions..This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.