Collaborative Research: Electrospray Additive Manufacturing of Thin Low Resistance Polyamide-Based Ion Exchange Membranes for Water Treatment

合作研究：水处理用薄型低阻聚酰胺基离子交换膜的电喷雾增材制造

• 批准号: 2001544
• 负责人: Jeffrey McCutcheon
• 金额: $ 31.75万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2001544&HistoricalAwards=false
• 关键词: Collaborative; Research; Electrospray; Additive; Manufacturing

This grant supports research to develop new knowledge about an electrospray additive manufacturing process to promote the progress of science and to advance national prosperity and well-being by facilitating the manufacture of materials to address water purification challenges and clean water shortages. Electrospray additive manufacturing is a process where organic monomers are deposited onto a surface to form a thin polymer film or membrane. This process carefully controls the way by which these molecules are placed on the surface and can be quickly adapted to manufacture a range of different membrane materials. The electrospray process, in this sense, has significant advantages over conventional film coating or casting processes. An example of one benefit of this approach would be that manufacturers could quickly adapt the process to make tailored water treatment membranes in response to emerging contaminants or pollutants in water. Results from this research benefit the U.S. economy and society by enabling the manufacture of very efficient membranes that provide better access to clean water. This research involves several disciplines including advanced manufacturing, materials science, chemical engineering, and electrochemistry. The use of a multi-disciplinary approach broadens participation of underrepresented groups in research and enhances engineering education and training for the future engineering workforce.The electrospray additive manufacturing process overcomes fundamental limitations, inherent to conventional manufacturing, that prevent reliable and controlled preparation of very thin polyamide ion exchange membranes with tunable properties. This research addresses knowledge gaps related to the use of electrospray additive manufacturing to enable incorporation of a range of co-monomers into the final membrane. This range of compositions allow the manufacture of materials not previously accessible via conventional manufacturing such as doctor-blade or slot-die casting. The research team prepares and characterizes the membranes to determine if electrospray additive manufacturing can be used to overcome mass transfer, solubility, and reaction kinetics limitations associated with conventional interfacial polymerization manufacturing. Additionally, the team uses the new process to incorporate fixed ionic groups into polyamide membranes to precisely engineer their properties via control of fixed ionic group concentration and cross-link density. Furthermore, the research team demonstrates that the electrospray additive manufacturing process can be used to manufacture membranes on a range of different substrates and that a resistances-in-series model can be used to inform the selection of support substrates.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.

该赠款支持研究，以发展有关电喷雾添加剂制造过程的新知识，以促进科学进步，并通过促进材料制造来应对水净化挑战和清洁水短缺，从而促进国家的繁荣和福祉。电喷雾添加剂制造是一个过程，将有机单体沉积在表面上以形成薄的聚合物膜或膜。该过程仔细控制了将这些分子置于表面上的方式，并且可以迅速适应以制造一系列不同的膜材料。从这个意义上讲，电喷雾过程比常规胶卷或铸造过程具有显着优势。这种方法的一个例子是，制造商可以迅速调整该过程，以制造量身定制的水处理膜，以应对水中的新兴污染物或污染物。这项研究的结果是通过实现非常有效的膜的生产来使美国经济和社会有益于更好的清洁水。这项研究涉及几个学科，包括高级制造，材料科学，化学工程和电化学。多学科方法的使用扩大了代表性不足的群体在研究中的参与并增强了未来工程劳动力的工程教育和培训。电喷雾添加剂制造过程克服了传统制造固有的基本限制，这些限制是对可靠的和对照的多酰胺离子离子离子膜与可调性特性的可靠和控制的制备。这项研究解决了与使用电喷雾添加剂制造有关将一系列共同经济体纳入最终膜的知识差距。这种构图范围允许制造以前无法通过常规制造（例如Doctor Blade或Slot-Die铸件）访问的材料。研究小组准备并表征膜，以确定是否可以使用电喷雾添加剂制造来克服与常规界面聚合制造相关的传质，溶解度和反应动力学限制。此外，该团队使用新工艺将固定的离子基团纳入聚酰胺膜中，以通过控制固定离子组浓度和交联密度来精确地设计其性质。此外，研究团队表明，电喷雾添加剂制造过程可用于在一系列不同的基材上制造膜，并且可以使用系列中的阻力模型来为支持基材的选择提供信息。该奖项反映了NSF的立法任务，并被认为是通过基金会的智力效果和广泛的评估来评估支持的，并值得通过评估。