Collaborative Research: Rational Design of Ionene + Ionic Liquid Membranes Based on Understanding Gas Transport on Different Length Scales

合作研究：基于不同长度尺度气体传输的紫罗烯离子液体膜的合理设计

• 批准号: 2312001
• 负责人: Sergey Vasenkov
• 金额: $ 22万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2312001&HistoricalAwards=false
• 关键词: Collaborative; Research; Rational; Design; Ionene

Membranes offer improved energy and operational efficiency compared to traditional chemical separation processes such as distillation and absorption. However, membrane technology is less mature than distillation and absorption technologies. Developing new membrane materials to make membrane-based separations competitive with these traditional technologies remains a significant need. Chemical separations are of vital importance as they underpin the production of energy and materials that allow the modern world to function. Improvements to separation processes are key to reducing energy consumption, costs of products and services, and greenhouse gas (GHG) emissions. This project will utilize synthetic chemistry, polymer science, and state-of-the-art transport measurement and spectroscopic techniques to develop new fundamental knowledge of membrane structures and performance, which can lead to breakthroughs in membrane performance. The lessons learned through the membrane design process and the development of structure-transport relationships for these membranes can also be translated to other applications, such as utilizing plastic wastes to obtain key starting materials in the generation of new high-performance polymer materials with unique properties that can be 3D printed. This project creates opportunities for training undergraduate and graduate students in a variety of synthetic and characterization techniques and leverages existing programs established by the investigators to facilitate undergraduate student participation.Gas diffusion plays a key role in the separation performance of polymer membranes. Yet, quantification and fundamental understanding of gas diffusion on microscopic, viz. sub-micrometer and micrometer, length scales comparable with sizes of structural inhomogeneities (domains) have not been demonstrated for ionenes. This project will address this knowledge gap, allowing for rational polymer membrane design based on a detailed understanding of microscopic diffusion and its relationship with the macroscopic transport through an entire membrane as well as membrane structural properties. The key objective of the synergistic experimental research plan is to develop a fundamental understanding of gas transport in a new type of polymer named “doubly segmented ionenes” (DS ionenes). The study of DS ionenes will create a new paradigm for the design of polymers for gas separation membranes and generate a significant body of knowledge that will also be of broad interest to the separation science and polymer science communities. The systematic variation of DS ionene structures will provide deep knowledge of how the composition, length, and volume fraction of major membrane constituents influence gas permeability and diffusion on all relevant length scales. The overall goal is to develop an understanding of the structure-transport relationship that allows for tailoring membrane composition to maximize performance for any target gas separation application. Carbon dioxide (CO2), methane (CH4), and carbon monoxide (CO) gases will be examined in microscopic diffusion NMR experiments. Additional gases related to energy production and consumption, including nitrogen, oxygen, and hydrogen, will be considered in the macroscopic membrane experiments. The success of this project will translate into major intellectual advancements in the ability to build high-permeability and high-selectivity polymer membranes for gas separations, which will be required to meet the energy challenges of the 21st Century.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.

与蒸馏和吸收等传统化学分离工艺相比，膜可提供更高的能源和运行效率，但是，开发新的膜材料以使膜分离技术与这些传统技术相比仍具有重要意义。化学分离至关重要，因为它们是现代世界运转的能源和材料生产的基础，分离工艺的改进是减少能源消耗、产品和服务成本以及温室气体 (GHG) 排放的关键。该项目将利用合成化学、聚合物科学以及最先进的传输测量和光谱技术，以开发膜结构和性能的新基础知识，这可以导致膜性能的突破。这些膜的结构-传输关系也可以转化为其他应用，例如利用塑料废物来获取关键原材料，以生成具有独特性能的可 3D 打印的新型高性能聚合物材料。本科生和研究生在各种合成和表征技术并利用研究人员建立的现有计划来促进本科生的参与。然而，气体扩散在微观（即亚微米和微米）的分离性能中起着关键作用。尚未证明紫罗烯的长度尺度与结构不均匀性（域）的大小相当，该项目将解决这一知识差距，允许基于对微观扩散及其与宏观关系的详细理解进行合理的聚合物膜设计。该协同实验研究计划的主要目标是对一种名为“双链段紫罗烯”（DS DS 紫罗烯）的新型聚合物中的气体传输有一个基本的了解。为气体分离膜聚合物的设计创造了一个新的范式，并产生了重要的知识体系，这些知识体系也将引起分离科学和聚合物科学界的广泛兴趣。提供有关主要膜成分的成分、长度和体积分数如何影响所有相关长度尺度上的气体渗透性和扩散的深入知识总体目标是加深对结构-传输关系的理解，以便调整膜成分以最大化。二氧化碳 (CO2)、甲烷 (CH4) 和一氧化碳 (CO) 气体的性能将在显微扩散核磁共振实验中进行检查。其他气体与能源生产和消耗相关，包括氮气、氧气和二氧化碳。氢，该项目的成功将转化为构建用于气体分离的高渗透性和高选择性聚合物膜的能力的重大智力进步，这是应对 21 世纪能源挑战所必需的。世纪。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。