Collaborative Research: The Role of Sulfonated Polymer Membrane Morphology in Microscale Transport of Organic Molecules
合作研究:磺化聚合物膜形态在有机分子微尺度传输中的作用
基本信息
- 批准号:1836551
- 负责人:
- 金额:$ 12万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-09-01 至 2022-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Advanced chemical sensors enable technologies such as point-of-care medical testing and personal protective equipment against chemical warfare agents. Increasing sophistication of the chemical sensors derives from advances in the materials used as the sensor or in studying existing materials with unusual properties. One such material is the commercial polymer, Nafion, which is used in electrolysis, mineral extraction, specialty chemical synthesis, electrochemical sensors, and fuel cells. The widespread use of Nafion is due to its unique chemical structure, which is comprised of a long hydrophobic (water repellent) backbone of fluorine and carbon atoms and hydrophilic (water loving) branches. These dual functionalities give rise to high chemical stability, high reactivity, and flexibility in the presence of water. The dual functionality also leads to unique transport of molecules through the material, particularly when fabricated into a thin membrane. Transport of small molecules within the Nafion membrane is well described by existing theories. However, transport of larger organic compounds, such as those found in chemical warfare agents, cannot be explained within existing theoretical frameworks, particularly when the water-induced flexibility of Nafion is considered. This project will use advanced experimental techniques to deduce transport of large organic molecules that are representative of chemical warfare agents through the dynamic Nafion membrane. This project will develop a direct mechanistic understanding of water-enabled transport of organic molecules through Nafion membranes. Preliminary data suggests large organic molecules are effectively immobilized in a tertiary interphase region between hydrophobic and hydrophilic domains in dry Nafion. The source of this interphase is hypothesized to be the fluoroether linkage between the backbone and the perfluorosulfonic acid side chains. However, phenols and other weak organic acids remain immobilized under both dry and wet conditions. This project will probe the interphase, and the role of bulk sulfonated polystyrene copolymers on transport of large organic molecules in mixed solvent systems. An interdisciplinary team will employ small angle neutron scattering, X-ray scattering, and nuclear magnetic resonance at high magnetic fields. If successful, the proposed research will resolve the relationship between the structural and dynamic properties of the distinctly different domains in perfluorosulfonic acid and sulfonated polystyrene membranes. Specifically, the investigation will determine impact of domain morphology on the transport, immobilization, and reactivity of organic molecules. The project will support graduate education, create new teaching modules, and community outreach activities that demonstrate opportunities at the intersection of transport, catalysis and structure optimization of polymeric membranes.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.
先进的化学传感器使诸如护理点医疗检测和个人防护设备等技术能够对抗化学战剂。化学传感器的日益复杂性来自于用作传感器的材料的进步或研究具有不寻常特性的现有材料。一种这样的材料是商业聚合物,Nafion,其用于电解,矿物提取,特种化学合成,电化学传感器和燃料电池。Nafion的广泛使用是由于其独特的化学结构,它由氟和碳原子的长疏水(防水)主链和亲水(亲水)分支组成。这些双功能性在水的存在下产生高化学稳定性、高反应性和柔性。双功能性还导致分子通过材料的独特运输,特别是当制造成薄膜时。现有的理论很好地描述了小分子在Nafion膜内的传输。然而,运输较大的有机化合物,如化学战剂中发现的那些,不能在现有的理论框架内解释,特别是当考虑到Nafion的水诱导的灵活性时。该项目将使用先进的实验技术来推断作为化学战剂代表的大有机分子通过动态Nafion膜的运输。该项目将开发一个直接的机械理解的水使能运输的有机分子通过Nafion膜。初步数据表明,大的有机分子被有效地固定在干Nafion的疏水和亲水结构域之间的第三界面区域。假设该界面的来源是主链和全氟磺酸侧链之间的氟醚键。然而,苯酚和其他弱有机酸在干燥和潮湿条件下保持固定。本计画将探讨在混合溶剂系统中,本体磺化聚苯乙烯共聚物对有机大分子之输送之界面及作用。一个跨学科的团队将采用小角中子散射,X射线散射和高磁场下的核磁共振。如果成功的话,拟议的研究将解决全氟磺酸和磺化聚苯乙烯膜中明显不同的域的结构和动态性能之间的关系。具体而言,调查将确定域形态的影响,运输,固定化和有机分子的反应性。该项目将支持研究生教育,创建新的教学模块,并展示在运输,催化和聚合物膜结构优化的交叉机会的社区推广活动。该奖项反映了NSF的法定使命,并已被认为是值得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的支持。
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Self‐Diffusion of a Chemical Warfare Agent Simulant and Water in Nafion by Pulsed Field Gradient NMR
通过脉冲场梯度 NMR 分析化学战剂模拟物和水在 Nafion 中的自扩散
- DOI:10.1002/cite.202300010
- 发表时间:2023
- 期刊:
- 影响因子:1.9
- 作者:Trusty, Blake;Fang, Junchuan;Angelopoulos, Anastasios;Vasenkov, Sergey
- 通讯作者:Vasenkov, Sergey
Transition between Different Diffusion Regimes and Its Relationship with Structural Properties in Nafion by High Field Diffusion NMR in Combination with Small-Angle X-ray and Neutron Scattering
- DOI:10.1021/acs.jpcb.0c07249
- 发表时间:2020-10-08
- 期刊:
- 影响因子:3.3
- 作者:Berens, Samuel J.;Yahya, Ahmad;Vasenkov, Sergey
- 通讯作者:Vasenkov, Sergey
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Sergey Vasenkov其他文献
Ein bisher einmaliger Einblick in die Diffusion durch die Beobachtung der Konzentration von Gastmolekülen in nanoporösen Wirtmaterialien
纳米多孔材料中气体分子控制的扩散
- DOI:
10.1002/ange.200602892 - 发表时间:
2006 - 期刊:
- 影响因子:0
- 作者:
J. Kärger;Pavel Kortunov;Sergey Vasenkov;L. Heinke;Dhananjai B. Shah;Rainer A. Rakoczy;Yvonne Traa;J. Weitkamp - 通讯作者:
J. Weitkamp
Gas self-diffusion in different local environments of mixed-matrix membranes as a function of UiO-66-NH<sub>2</sub> metal–organic framework loading
- DOI:
10.1016/j.micromeso.2024.113249 - 发表时间:
2024-10-01 - 期刊:
- 影响因子:
- 作者:
Omar Boloki;Stephen Dewitt;Eric T. Hahnert;Zachary Smith;Sergey Vasenkov - 通讯作者:
Sergey Vasenkov
Macroscopic and microscopic gas diffusivity measurements for PIM-COOH/UiO-66-NHsub2/sub composite membranes
PIM - COOH/UiO - 66 - NH₂复合膜的宏观和微观气体扩散率测量
- DOI:
10.1016/j.memsci.2025.124246 - 发表时间:
2025-08-01 - 期刊:
- 影响因子:9.000
- 作者:
Wan-Ni Wu;Omar Boloki;Sergey Vasenkov;Zachary P. Smith - 通讯作者:
Zachary P. Smith
Influence of breakup and reformation of micelles on surfactant diffusion in pure and mixed micellar systems
- DOI:
10.1016/j.micromeso.2008.12.026 - 发表时间:
2009-10-01 - 期刊:
- 影响因子:
- 作者:
Amrish Menjoge;Monica A. James-Smith;Dinesh Shah;Sergey Vasenkov - 通讯作者:
Sergey Vasenkov
Sergey Vasenkov的其他文献
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{{ truncateString('Sergey Vasenkov', 18)}}的其他基金
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 - 财政年份:2023
- 资助金额:
$ 12万 - 项目类别:
Standard Grant
Collaborative Research: Quantifying the Role of Interfaces in Liquid Separation Membranes based on Carbon Molecular Sieves
合作研究:量化基于碳分子筛的液体分离膜中界面的作用
- 批准号:
2135662 - 财政年份:2022
- 资助金额:
$ 12万 - 项目类别:
Standard Grant
Collaborative Research: Crossing the percolation threshold for selective gas transport using interconnected crystals of metal–organic frameworks in polymer-based hybrid membranes
合作研究:利用聚合物杂化膜中金属有机框架的互连晶体跨越选择性气体传输的渗滤阈值
- 批准号:
2034734 - 财政年份:2021
- 资助金额:
$ 12万 - 项目类别:
Standard Grant
Collaborative Research: Enabling rational design of MOF-polymer mixed matrix membranes for liquid separations through understanding of microscale and macroscale properties
合作研究:通过了解微观和宏观特性,实现用于液体分离的 MOF-聚合物混合基质膜的合理设计
- 批准号:
1836735 - 财政年份:2018
- 资助金额:
$ 12万 - 项目类别:
Standard Grant
Collaborative Research: Scalable Production of Metal-Organic Molecular Sieves with Optimized Gas Transport Properties
合作研究:具有优化气体传输性能的金属有机分子筛的规模化生产
- 批准号:
1561347 - 财政年份:2016
- 资助金额:
$ 12万 - 项目类别:
Standard Grant
UNS:Collaborative research: Resolving changes in microscopic properties as a result of hybrid polymer-ZIF membrane formation to enable rational design of such membranes
UNS:合作研究:解决混合聚合物-ZIF膜形成导致的微观特性的变化,以实现此类膜的合理设计
- 批准号:
1510411 - 财政年份:2015
- 资助金额:
$ 12万 - 项目类别:
Standard Grant
CAREER: Fundamentals of the Relationship between Pore Structure and Transport of Light Gases in Materials with a Hierarchy of Pore Sizes
职业:具有孔径等级的材料中孔结构与轻气体传输之间关系的基础
- 批准号:
0951812 - 财政年份:2010
- 资助金额:
$ 12万 - 项目类别:
Standard Grant
Collaborative Research: Molecular modeling and experimental investigation of the structure and dynamics of confined ionic liquids and their performance in gas separations
合作研究:限域离子液体的结构和动力学及其在气体分离中的性能的分子建模和实验研究
- 批准号:
0967703 - 财政年份:2010
- 资助金额:
$ 12万 - 项目类别:
Continuing Grant
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