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High flux low pressure thin film nanocomposite ultrafiltration membranes based on nanofibrous substrates
You, H; Li, X; Yang, Y; Wang, BY; Li, ZX; Wang, XF; Zhu, MF; Hsiao, BS;王宝义; Li ZX(李卓昕)
2013
发表期刊SEPARATION AND PURIFICATION TECHNOLOGY
卷号108页码:143-151
摘要In this study, a new class of high performance thin film nanocomposite (TFNC) ultrafiltration membrane based on a polyacrylonitrile (PAN) nanofibrous substrate coupled with a thin hydrophilic nanocomposite barrier layer was fabricated by electrospinning technique combined with solution treatment method, and was used as an ultrafiltration media to separate an oil/water emulsion. The hydrophilic nanocomposite barrier layer was composed of crosslinked poly(vinyl alcohol) (PVA) thin layer incorporating surface oxidized multi-walled carbon nanotubes (MWNTs), and was prepared by immersing electrospun PVA-MWNT/PAN nanofibrous double-layer mats into optimized water/acetone solution and then chemically crosslinked by glutaraldehyde in water/acetone solution. The electrospun PVA-MWNT nanofiber top layer would be swollen to merge imperceptibly into an integrated barrier film on the supporting PAN layer. The variation of the free volume of PVA barrier layer with different MWNTs contents was investigated by positron annihilation lifetime spectroscopy (PALS). The PALS results proved that the free volume of PVA-MWNT/PAN TFNC membranes increased markedly with the increase of MWNTs concentration in the PVA layer, and the filtration evaluation also confirmed that the incorporation of MWNTs into PVA barrier layer could improve the water flux significantly, which indicated that more effective water channels were generated in the nanocomposite barrier layer by the incorporation of MWNTs into PVA barrier layer. The PVA-MWNT/PAN TFNC (10 wt.% MWNT) membrane showed very high water flux (270.1 l/m(2) h) with high rejection rate (99.5%) even at very low feeding pressure (0.1 MPa). In addition, the PVA-MWNT/PAN composite membranes showed very good overall mechanical properties. (C) 2013 Elsevier B.V. All rights reserved.
关键词Electrospinning Solution treatment Thin film nanocomposite membrane Ultrafiltration Positron annihilation spectroscopy
学科领域Engineering
DOI10.1016/j.seppur.2013.02.014
收录类别SCI
WOS记录号WOS:000317887200020
引用统计
被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223869
专题多学科研究中心
核技术应用研究中心
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GB/T 7714
You, H,Li, X,Yang, Y,et al. High flux low pressure thin film nanocomposite ultrafiltration membranes based on nanofibrous substrates[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2013,108:143-151.
APA You, H.,Li, X.,Yang, Y.,Wang, BY.,Li, ZX.,...&李卓昕.(2013).High flux low pressure thin film nanocomposite ultrafiltration membranes based on nanofibrous substrates.SEPARATION AND PURIFICATION TECHNOLOGY,108,143-151.
MLA You, H,et al."High flux low pressure thin film nanocomposite ultrafiltration membranes based on nanofibrous substrates".SEPARATION AND PURIFICATION TECHNOLOGY 108(2013):143-151.
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