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.

与传统的化学分离过程（例如蒸馏和损失）相比，膜提供了提高的能量和运营效率。但是，膜技术不如蒸馏和有损技术成熟。开发新的膜材料以使基于​​膜的分离与这些传统技术具有竞争力仍然是一个巨大的需求。化学分离至关重要，因为它们是能源和材料的产生，使现代世界的运作。分离过程的改进是减少能源消耗，产品和服务成本以及温室气（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运输测量和光谱技术来开发膜结构和性能的新基本知识，这可能会导致膜性能的突破。通过膜设计过程中学到的经验教训以及这些机制的结构传输关系的发展也可以转化为其他应用，例如利用塑料废物在新的高性能聚合物材料中获得具有3D打印的独特性能的新的高性能聚合物材料。该项目为培训本科生和研究生提供了各种合成和特征技术的机会，并利用研究人员建立的现有计划来促进。学生参与。GAS扩散在聚合物膜的分离性能中起关键作用。然而，对微观的气体扩散的定量和基本了解，即。亚微米和千分尺，长度尺度与结构不均匀性（域）的大小相当（域）尚未被证明。该项目将解决这一知识差距，从而允许基于对微观扩散的详细了解及其与宏观传输的关系，从而通过整个膜以及膜结构特性进行理性聚合物膜设计。协同实验研究计划的主要目的是在一种称为“双重分割的离子元素”（DS Ionenes）的新型聚合物中对气体传输的基本了解。对DS离子的研究将创建一个新的范式，用于设计用于气体分离机制的聚合物，并产生大量知识，这也将引起分离科学和聚合物科学社区的广泛关注。 DS离子结构的系统变化将提供有关主要膜构建体的组成，长度和体积分数如何影响气体渗透性和对所有相关长度尺度的扩散的深入了解。总体目标是对结构交通关系有一种理解，该关系允许调整膜组成，以最大程度地提高任何目标气体分离应用的性能。二氧化碳（CO2），甲烷（CH4）和一氧化碳（CO）气体将在微观扩散NMR实验中检查。在宏观膜实验中将考虑与能源生产和消耗有关的其他气体，包括氮，氧和氢。 The success of this project will tr​​anslate 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 precious of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.