Fouling resistant, freestanding zwitterionic polysulfones for osmotically driven membrane processes

用于渗透驱动膜工艺的防垢、独立式两性离子聚砜

• 批准号: 1836719
• 负责人: Matthew Green
• 金额: $ 31.12万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1836719&HistoricalAwards=false
• 关键词: Fouling; resistant; freestanding; zwitterionic; polysulfones

Providing sustainable and secure access to potable water is a critical challenge facing this generation. Natural water sources are treated to remove salt, organic matter, and biological organisms. As water demand increases, water sources that require more rigorous pretreatment must be utilized. Polymer membranes are a promising technology for these more rigorous water purification demands, as they selectively transport purified water while rejecting contaminants. Although promising, current membranes face two profound limitations: adhesion and growth of biological films on the membrane, and membrane degradation by chlorine. Both effects reduce membrane performance and increase cost due to the need to clean or replace the membrane. This project will design and test new polymeric membrane materials that retain the performance of commercial membranes, with molecular-level modification of the polymer for increased resistance to fouling by biofilms and decreased degradation by chlorine. Through an integration of macromolecular and process engineering, this project will investigate how molecular level polymeric design impacts processing, microstructure, and separation performance. Poly(arylene ether sulfone) precursors will be modified using post-polymerization modifications to introduce sulfobetaine zwitterions and a series of crosslinkers. The charge and crosslink densities will be optimized to balance hydrophilicity and water sorption versus swelling that leads to a loss of mechanical stability. Then, (anti)fouling mechanisms for the new membranes will be probed, including the role of surface roughness, hydrophilicity, and charge content on protein adhesion. Also, the influence of systematic changes in charge content on physical membrane characteristics will be studied, including water permeability, salt rejection at various salt concentrations and pressure drops, membrane porosity, free volume, morphology, and separation/process costs. Finally, the charge content and processing conditions will be correlated to membrane longevity, specifically structural integrity at various transmembrane pressure drops for asymmetric membranes, resistance to chlorine-mediated oxidative degradation, and long-term fouling studies. One graduate student will be trained in this project and undergraduate students will be involved in the laboratory work. An educational outreach plan is included that will engage the diverse student body of Arizona State University and the surrounding metropolitan community.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.

提供可持续和安全的饮用水是这一代人面临的一项重大挑战。对天然水源进行处理以去除盐、有机物和生物有机体。随着水需求的增加，必须利用需要更严格预处理的水源。聚合物膜对于这些更严格的水净化需求是一种有前途的技术，因为它们选择性地输送净化水，同时拒绝污染物。虽然有前途，目前的膜面临着两个深刻的限制：粘附和生长的生物膜上的膜，膜降解氯。由于需要清洁或更换膜，这两种效应都降低了膜性能并增加了成本。该项目将设计和测试新的聚合物膜材料，这些材料将保持商业膜的性能，并对聚合物进行分子级改性，以提高对生物膜污染的抵抗力，并减少氯的降解。通过大分子和工艺工程的整合，该项目将研究分子水平的聚合物设计如何影响加工，微观结构和分离性能。聚芳醚砜前体将通过聚合后改性引入磺基甜菜碱两性离子和一系列交联剂进行改性。将优化电荷和交联密度以平衡亲水性和吸水性与导致机械稳定性损失的溶胀。然后，（抗）污染机制的新膜将探讨，包括表面粗糙度，亲水性和电荷含量对蛋白质粘附的作用。此外，还将研究电荷含量的系统变化对物理膜特性的影响，包括透水性、不同盐浓度和压降下的盐截留率、膜孔隙率、自由体积、形态和分离/处理成本。最后，电荷含量和处理条件将与膜寿命相关，特别是在不对称膜的各种跨膜压降下的结构完整性、对氯介导的氧化降解的抗性和长期污染研究。一名研究生将在本项目中接受培训，本科生将参与实验室工作。该奖项反映了NSF的法定使命，并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，被认为值得支持。

项目成果

Quaternary Ammonium-Functionalized Poly(Arylene Ether Sulfone) Random Copolymers for Direct Air Capture

• DOI: 10.1021/acs.macromol.3c00760
• 发表时间: 2023-08
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Hoda Shokrollahzadeh Behbahani;Husain Mithaiwala;Horacio Lopez Marques;Winston Wang;B. Freeman;M. Green

Photocurable Poly(ethylene glycol) Diacrylate Resins with Variable Silica Nanoparticle Loading

• DOI: 10.1021/acs.iecr.9b02068
• 发表时间: 2019-07
• 期刊: Industrial & Engineering Chemistry Research
• 影响因子: 4.2
• 作者: Alexis Hocken;Yezhou Yang;F. Beyer;B. Morgan;K. Kline;T. Piper;M. Green

Synthesis and thermomechanical characteristics of zwitterionic poly(arylene ether sulfone) copolymers

• DOI: 10.1016/j.polymer.2022.125522
• 发表时间: 2022-11
• 期刊: Polymer
• 影响因子: 4.6
• 作者: Yi Yang;Hoda Shokrollahzadeh Behbahani;B. Morgan;F. Beyer;Alexis Hocken;M. Green

Covalently integrated silica nanoparticles in poly(ethylene glycol)-based acrylate resins: thermomechanical, swelling, and morphological behavior

• DOI: 10.1039/d1sm01377g
• 发表时间: 2022-01-03
• 期刊: SOFT MATTER
• 影响因子: 3.4
• 作者: Hocken, Alexis;Beyer, Frederick L.;Green, Matthew D.
• 通讯作者: Green, Matthew D.

Crosslinked electrospun composite membranes of poly(vinyl alcohol) and poly(vinyl chloride): tunable mechanical properties, porosity and performance

• DOI: 10.1002/pi.6224
• 发表时间: 2021-03
• 期刊: Polymer International
• 影响因子: 3.2
• 作者: Husain Mithaiwala;Zachary Tronstad;M. M. Korah-M.;Alexander N. Buffington;M. Green