EAGER: Confining biofouling using sticky stripes

EAGER：使用粘性条纹限制生物污垢

基本信息

批准号：
1719747
负责人：
Jessica Schiffman
金额：
$ 10万
依托单位：
University of Massachusetts Amherst
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-03-01 至 2019-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1719747&HistoricalAwards=false
关键词：
EAGER Confining biofouling using sticky

项目摘要

Ultrafiltration membranes are the state of the art for water treatment. With time, however, bacteria colonize on the surface of the ultrafiltration membranes in a process known as biofouling. Biofouling decreases the transport of purified water across the membrane, requires expensive and time consuming methods to remove the accumulated bacteria, and ultimately, increase the costs, energy consumption of the water purification process, and shortens the lifetime of the membrane. Current strategies to prevent biofouling include use of designer materials that prevent fouling, either via use of new polymers or incorporation of biocides into the existing membrane material. These existing strategies lead to materials that are either expensive, unstable, and/or have decreased performance relative to the precursor membrane. The research will provide evidence that materials chemistry can immobilize a nanomaterial onto a porous antifouling polymer ultrafiltration membrane. This project explores synthesis of a novel membrane hierarchical structure, which utilizes a hydrophilic polymer to increase the flux of pure water across the membrane by confining the hydrophilic polymer layer to an ultrathin upper layer, without blocking pores. Secondly, sacrificial antifouling strips with biocidal properties will be electronspun onto this layer to localize fouling and antimicrobial properties to certain regions of the membrane. In this one year project, the PI will demonstrate that the antifouling fibers will adhere to the ultrathin hydrophilic layer, to alleviate concerns of the high risk nature of the concept. The first method to be explore for deposition of the fibers is electrospinning, while contingency plans include additive manufacturing and 3D printing.

超滤膜是水处理领域的最新技术。然而，随着时间的推移，细菌会在超滤膜的表面上定居，这一过程称为生物污垢。生物污垢减少了净化水穿过膜的传输，需要昂贵且耗时的方法来去除积累的细菌，最终增加水净化过程的成本和能耗，并缩短膜的使用寿命。目前防止生物污垢的策略包括使用可防止污垢的设计材料，通过使用新聚合物或将杀菌剂掺入现有的膜材料中。这些现有的策略导致材料要么昂贵、不稳定，和/或相对于前体膜性能降低。该研究将提供材料化学可以将纳米材料固定到多孔防污聚合物超滤膜上的证据。该项目探索了一种新型膜分层结构的合成，该结构利用亲水聚合物将亲水聚合物层限制在超薄的上层，从而增加纯水穿过膜的通量，而不阻塞孔隙。其次，具有杀菌特性的牺牲防污条将被电子纺丝到该层上，以将污垢和抗菌特性集中到膜的某些区域。在这个为期一年的项目中，首席研究员将证明防污纤维将粘附在超薄亲水层上，以减轻对该概念高风险性质的担忧。第一种探索的纤维沉积方法是静电纺丝，而应急计划包括增材制造和 3D 打印。