基质(水族馆)
膜
超滤(肾)
纳滤
化学
薄膜复合膜
渗透
化学工程
色谱法
聚酰胺
二价
图层(电子)
复合数
表面粗糙度
材料科学
高分子化学
复合材料
有机化学
反渗透
生物化学
工程类
地质学
海洋学
作者
Yuchen Du,Biplob Kumar Pramanik,Yang Zhang,Veeriah Jegatheesan
出处
期刊:Desalination
[Elsevier]
日期:2022-11-01
卷期号:541: 116020-116020
被引量:7
标识
DOI:10.1016/j.desal.2022.116020
摘要
This study investigated the impacts of polyether sulfone (PES) substrate with four different molecular weight cut-offs (MWCO) on the performance of the thin-film composite (TFC) nanofiltration membranes. When the MWCO of the substrate increased: (i) the effective thickness of the substrate decreased; (ii) the average pore size of the substrate enlarged in general; and (iii) the surface roughness of the substrate increased. When the MWCO of substrates was increased, the TFC membranes synthesized from them showed the following characteristics: (i) the thickness of the polyamide layer expanded; (ii) average size of the nodules on the membrane surface enlarged, (iii) permeate flux enhanced in general, (iv) rejection of NaCl (RNaCl) increased and rejection of MgSO4 (RMgSO4) did not change significantly; (v) flux recovery rates decreased. The study showed that the MWCO of the substrate had a similar influence on the permeate fluxes produced by the substrate and the TFC membrane. Lower MWCO substrates induced higher selectivity to divalent and monovalent ions.
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