Influence of electrospun fiber size on the separation efficiency of thin film nanofiltration composite membrane
Influence of electrospun fiber size on the separation efficiency of thin film nanofiltration composite membrane
复制标题
DOI：
10.1016/j.memsci.2011.12.005
复制
发表时间：
2012-03-01
影响因子：
9.5
通讯作者：
Ramakrishna, Seeram
中科院分区：
文献类型：
--
作者：
Kaur, Satinderpal;Sundarrajan, Subramanian;Ramakrishna, Seeram
目前，电纺纳米纤维膜（ENM）被分类为微滤（MF）膜，其在进一步改性后用于纳滤（NF）应用。本研究的目的是调查的适用性ENM水处理应用。通过改变聚丙烯腈溶液的浓度（即4、6、8和10wt%）获得不同的纤维尺寸，以探索静电纺丝纤维尺寸和拒绝的盐离子之间的相互作用。当纤维尺寸较大时，其“泡点”较高，因此其纯水通量也较高。为了将这些微滤膜转化为纳滤膜，使用界面聚合技术在ENM表面涂覆薄膜。在该开发的薄膜纳米纤维复合物（TFNC）膜上进行2000ppm的各种盐的分离。结果表明，随着纤维尺寸的减小，孔径也随之减小，盐的分离能力增强，但通量有所下降。当电纺层的横截面厚度减小以及较小的孔径，它导致在高盐截留率的增加通量。此外，还研究了这些TFNC膜对PEG 300、PEG 600和PEG 3400的截留效率。(C)2011年爱思唯尔B。V.保留所有权利。
Currently, electrospun nanofibrous membrane (ENM) is classified as a microfiltration (MF) membrane, which upon further modification is used for nanofiltration (NF) applications. The objective of this study was to investigate the suitability of ENM for water treatment applications. Different fiber sizes were obtained by varying the concentration of polyacrylonitrile solution (namely 4, 6, 8 and 10 wt%) to explore the interplay between electrospun fiber size and rejected salt ions. When the fiber size was larger, its 'bubble-point' was higher and hence its pure water flux was also higher. In order to transform these MF membrane to NF membrane, an interfacial polymerization technique was used to coat a thin film on the surface of ENM. Separation of 2000 ppm of various salts was conducted on this developed thin film nanofibrous composite (TFNC) membrane. The results indicated that as the fiber size decreased, the pore-size also decreased, and the separation of salts increased, while at the expense of flux. When the cross-sectional thickness of the electrospun layer was decreased together with smaller pore-size, it resulted in the increased flux with high salt rejection. In addition, rejection efficiency of these TFNC membranes against PEG 300, PEG 600 and PEG 3400 were also studied. (C) 2011 Elsevier B. V. All rights reserved.