聚偏氟乙烯
薄膜复合膜
化学工程
正渗透
膜
聚酰胺
材料科学
浓差极化
纳米纤维
静电纺丝
界面聚合
海水淡化
结垢
图层(电子)
反渗透
复合材料
色谱法
聚合物
化学
生物化学
单体
工程类
作者
Cong Ma,Zhaoyang Cheng,Meng Zhang,Yukun Huang,Wei‐Li Huang,Liang Wang,Bin Zhao,Zhaohui Zhang
出处
期刊:Chemosphere
[Elsevier]
日期:2023-10-01
卷期号:338: 139556-139556
被引量:2
标识
DOI:10.1016/j.chemosphere.2023.139556
摘要
The novel thin film composite (TFC) forward osmosis (FO) membrane with electrospinning nanofibers as support layer can alleviate internal concentration polarization (ICP). While the macropores of the nanofiber support layer cause defects in the polyamide (PA) layer. Therefore, hydrophobic polyvinylidene fluoride (PVDF) fine nanofibers were used as an interlayer to modulate the process of interfacial polymerization (IP) in this study. The results showed that the introduction of the interlayer improved the hydrophobicity of the support layer for achieving uniform, thin and defect-free selective polyamide (PA) layer. The water flux of TFC-PVDF was 58.26 LMH in the FO mode of 2 M NaCl, which was two times higher than that of the unmodified FO membrane. Lower reverse salt flux (4.91 gMH) and structural parameter (179.43 μm) alleviated the ICP. In addition, TFC-PVDF membrane showed good anti-fouling performance for SA (flux recovery ratio of 93.97%) due to high hydrophilicity, low zeta potential and low roughness. This study provides an easy and promising method to prepare defect-free PA selective layer on the macropores nanofiber support layer. The novel FO membrane shows high desalination performance and anti-fouling properties.
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