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Preparation and Characterization of Electrospun Polyurethane Nanofibrous Microfiltration Membrane
Journal of Polymers and the Environment ( IF 5.3 ) Pub Date : 2020-06-27 , DOI: 10.1007/s10924-020-01801-z
Mohsen Moslehi , Hossein Mahdavi

Herein, the preparation of polyurethane nanofibrous microfiltration membranes, with electrospinning and then dip-coating methods was reported. The study of process parameters (i.e. needle-free electrospinning and dip-coating condition) on the membrane properties was also conducted. The different pore sizes of the prepared MF membranes (e.g. 0.23, 0.33, and 0.47 μm) is orchestrated through the adjustment of various electrospinning and dip-coating parameters. The capability of these membranes to simultaneously eliminate the sources of water pollution, i.e. micro-particles and bacteria, has been demonstrated. Specifically, the prepared membranes could thoroughly reject the E. coli BL21 (DE3) bacteria (~ 97–99%) as well as micro-particles through size extrusion mechanism (~ 95–99%), while they retained a high permeation flux (~ 65,400, ~ 40,000 and ~ 25,700 (L/m2 h bar) for 0.46, 0.33, and 0.25 μm pore size, respectively). In addition, a comparison between nanofibrous MF membranes and their commercial counterparts from both utility and effectiveness standpoint was conducted and the obtained result indicated the supreme performance of these membranes in comparison with the commercial membranes of the same mean pore size, also with almost double or triple higher flux.



中文翻译:

电纺聚氨酯纳米纤维微滤膜的制备与表征

本文报道了采用静电纺丝然后浸涂法制备聚氨酯纳米纤维微滤膜的方法。还对膜性能进行了工艺参数(即无针电纺和浸涂条件)的研究。通过调整各种静电纺丝和浸涂参数,可以调整制得的MF膜的不同孔径(例如0.23、0.33和0.47μm)。这些膜具有同时消除水污染源(即微粒和细菌)的能力。具体而言,准备好的膜可以彻底排斥大肠杆菌BL21(DE3)细菌(〜97–99%)以及通过尺寸挤压机制产生的微粒(〜95–99%),同时它们保留了高渗透通量(〜65,400,〜40,000和〜25,700(L / m)2  h bar)分别用于0.46、0.33和0.25μm的孔径。此外,从实用性和有效性的角度进行了纳​​米纤维MF膜与商用膜的比较,结果表明,与平均孔径相同,几乎两倍或两倍的商用膜相比,这些膜的性能最高。通量提高三倍。

更新日期:2020-08-27
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