Ultrafiltration Membranes Enhanced with Electrospun Nanofibers Exhibit Improved Flux and Fouling Resistance
Ultrafiltration Membranes Enhanced with Electrospun Nanofibers Exhibit Improved Flux and Fouling Resistance
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DOI：
10.1021/acs.iecr.7b00631
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发表时间：
2017-05-17
影响因子：
4.2
通讯作者：
Schiffman, Jessica D.
中科院分区：
文献类型：
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作者：
Dobosz, Kerianne M.;Kuo-Leblanc, Christopher A.;Schiffman, Jessica D.
在这项研究中，我们已经提高了膜性能，通过增强超滤膜与静电纺丝纳米纤维。高孔隙率的多孔层提供了不影响基底膜结构的可定制平台。为了解耦的影响，生物化学和形态学上的膜性能，两种聚合物膜工业中常用的，纤维素和聚砜，被静电纺丝成一个层，这是50 μ m厚，由随机积累的1 μ m直径的纤维。通过用纤维素或聚砜纳米纤维层增强的超滤膜提高抗污染性并保留选择性。可能是因为它们更好的机械完整性，聚砜纳米纤维膜在更大的跨膜压力范围内表现出比纤维素纳米纤维膜和对照膜更高的纯水渗透性。这项工作表明，纳米纤维增强膜具有作为多功能材料平台的潜力，可用于改善超滤膜的性能。
In this study, we have improved membrane performance by enhancing ultrafiltration membranes with electrospun nanofibers. The high-porosity nanofiber layer provides a tailorable platform that does not affect the base membrane structure. To decouple the effects that nanofiber chemistry and morphology have on membrane performance, two polymers commonly used in the membrane industry, cellulose and polysulfone, were electrospun into a layer that was 50 mu m thick and consisted of randomly accumulated 1-mu m-diameter fibers. Fouling resistance was improved and selectivity was retained by ultrafiltration membranes enhanced with a layer of either cellulose or polysulfone nanofibers. Potentially because of their better mechanical integrity, the polysulfone nanofiber-membranes demonstrated a higher pure-water permeance across a greater range of transmembrane pressures than the cellulose nanofiber-membranes and control membranes. This work demonstrates that nanofiber-enhanced membranes hold potential as versatile materials platforms for improving the performance of ultrafiltration membranes.