Synthesis and Characterization of a Thin-Film Composite Nanofiltration Membrane Based on Polyamide-Cellulose Acetate: Application for Water Purification

Widespread applications of nanofiltration (NF) and reverse osmosis (RO)-based processes for water purification and desalination call for high-performance thin-film composite (TFC) membranes. In this work, a novel and facile modification method was proposed to fabricate high-performance thin-film composite nanofiltration membrane by introducing Ca2+ in the heat post-treatment. The introduction of Ca2+ induced in situ Ca2+-carboxyl intra-bridging, leading to the embedment of Ca2+ in the polyamide (PA) layer. This post modification enhanced the hydrophilicity and surface charge of NF membranes compared to the pristine membrane. More interestingly, the modified membrane had more nodules and exhibited rougher morphology. Such changes brought by the addition of Ca2+ enabled the significant increase of water permeability (increasing from 17.9 L·m−2·h−1·bar−1 to 29.8 L·m−2·h−1·bar−1) while maintaining a high selectivity (Na2SO4 rejection rate of 98.0%). Furthermore, the intra-bridging between calcium and carboxyl imparted the NF membranes with evident antifouling properties, exhibiting milder permeability decline of 4.2% (compared to 16.7% of NF-control) during filtration of sodium alginate solution. The results highlight the potential of using Ca2+-carboxyl intra-bridging post-treatment to fabricate high-performance TFC membranes for water purification and desalination.

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Synthesis and characterization of a polyamide thin film composite membrane based on a polydopamine coated support layer for forward osmosis

RSC Advances ◽

10.1039/c5ra20499b ◽

2015 ◽

Vol 5 (128) ◽

pp. 106113-106121 ◽

Cited By ~ 18

Author(s):

Yangbo Huang ◽

Haiyang Jin ◽

Hao Li ◽

Ping Yu ◽

Yunbai Luo

Keyword(s):

Thin Film ◽

Composite Membrane ◽

High Performance ◽

Interfacial Polymerization ◽

Forward Osmosis ◽

Synthesis And Characterization ◽

Film Composite ◽

Thin Film Composite Membrane ◽

Thin Film Composite

In this study, a facile method has been developed to prepare high performance thin film composite forward osmosis membranes, which was conducted by coating the surface of a polysulfone substrate with polydopamine prior to the interfacial polymerization.

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Preparation and characterization of novel thin film composite nanofiltration membrane with PVDF tree-like nanofiber membrane as composite scaffold

Materials & Design ◽

10.1016/j.matdes.2020.109101 ◽

2020 ◽

Vol 196 ◽

pp. 109101

Author(s):

Feng Liu ◽

Lanlan Wang ◽

Dawei Li ◽

Qingsheng Liu ◽

Bingyao Deng

Keyword(s):

Thin Film ◽

Composite Scaffold ◽

Nanofiltration Membrane ◽

Nanofiber Membrane ◽

Film Composite ◽

Thin Film Composite

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Synthesis and characterization of flat-sheet thin film composite forward osmosis membranes

Journal of Membrane Science ◽

10.1016/j.memsci.2011.02.013 ◽

2011 ◽

Vol 372 (1-2) ◽

pp. 292-302 ◽

Cited By ~ 410

Author(s):

Jing Wei ◽

Changquan Qiu ◽

Chuyang Y. Tang ◽

Rong Wang ◽

Anthony G. Fane

Keyword(s):

Thin Film ◽

Forward Osmosis ◽

Synthesis And Characterization ◽

Film Composite ◽

Thin Film Composite ◽

Flat Sheet

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Fabrication and characterization of a novel nanofiltration membrane by the interfacial polymerization of 1,4-diaminocyclohexane (DCH) and trimesoyl chloride (TMC)

RSC Advances ◽

10.1039/c5ra02560e ◽

2015 ◽

Vol 5 (51) ◽

pp. 40742-40752 ◽

Cited By ~ 27

Author(s):

Gui-E. Chen ◽

Yan-Jun Liu ◽

Zhen-Liang Xu ◽

Yong-Jian Tang ◽

Hui-Hong Huang ◽

...

Keyword(s):

Thin Film ◽

Significant Influence ◽

Interfacial Polymerization ◽

Nanofiltration Membrane ◽

Film Composite ◽

Thin Film Composite ◽

Fabrication And Characterization ◽

Polyamide Membrane ◽

Trimesoyl Chloride

A novel thin-film composite polyamide membrane for nanofiltration is prepared, and the addition of sodium N-cyclohexylsulfamate is found to have a significant influence on its performance.

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