Hyperbranched polyester amide/polyethersulphone mixed matrix nanofiltration membranes for contaminant rejection

IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
RSC Advances Pub Date : 2025-01-21 DOI:10.1039/D4RA08400D
Ayman El-Gendi and Mona H. Abdel Rehim
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Abstract

Nanofiltration (NF) separation technology is a low-pressure filtration process, which is highly efficient and environmentally friendly. As a result, it has found wide application in water treatment. This work describes the preparation of flat sheet membranes via the phase inversion method using blends of hyperbranched polyester amide (PEA) and polyether sulphone (PES) in definite ratios. The obtained mixed matrix membranes were characterized using FTIR, TGA and contact angle analysis, and their morphologies were investigated using SEM. SEM images showed a porous membrane with micro-voids found underneath, confirming the suitability of the membranes for nanofiltration. Adding PEA to PES changed the porosity, which changed the membrane performance. Examining the removal of heavy metals [Pb(NO3) and CuSO4] using the prepared membranes revealed that the NF membranes had a higher salt rejection efficiency than pure PES with a good permeate flux. M3 membrane showed 81% rejection of Pb (NO3)2, while M2, the membrane with a low PEA ratio, rejected 85%, with high water flux for both membranes. Moreover, the presence of PEA in the membrane tissue led to protein rejection up to 99.5%. Thus, these novel blend membranes proved themselves as NF-type membranes with better performance in water treatment.

Abstract Image

超支化聚酯酰胺/聚醚砜混合基质纳滤膜的污染物截留
纳滤分离技术是一种高效、环保的低压过滤工艺。因此,它在水处理中得到了广泛的应用。这项工作描述了用超支化聚酯酰胺(PEA)和聚醚砜(PES)按一定比例共混物通过相转化法制备平板膜。采用红外光谱(FTIR)、热重分析(TGA)和接触角分析(contact angle analysis)对所得混合基质膜进行了表征,并用扫描电镜(SEM)对其形貌进行了表征。扫描电镜图像显示,多孔膜下有微孔,证实了膜的纳滤适用性。在PES中加入PEA改变了孔隙率,从而改变了膜的性能。对制备的膜对重金属[Pb(NO3)和CuSO4]的去除效果进行了测试,结果表明,纳滤膜的除盐效率高于纯PES膜,并具有良好的渗透通量。M3膜对Pb (NO3)2的去除率为81%,而PEA比较低的M2膜对Pb (NO3)2的去除率为85%,两种膜均具有较高的水通量。此外,PEA在膜组织中的存在导致高达99.5%的蛋白质排斥。因此,这些新型共混膜在水处理中具有更好的性能,是nf型膜。
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来源期刊
RSC Advances
RSC Advances chemical sciences-
CiteScore
7.50
自引率
2.60%
发文量
3116
审稿时长
1.6 months
期刊介绍: An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
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