Polyamide Nanofiltration Membrane from Surfactant-assembly Regulated Interfacial Polymerization of 2-Methylpiperazine for Divalent Cations Removal

2021 ◽  
Author(s):  
Li Gong ◽  
Yuzhang Zhu ◽  
Dianyu Dong ◽  
Yuping Zhang ◽  
Liangliang Gui ◽  
...  
Keyword(s):  
Interfacial Polymerization ◽  
Divalent Cations ◽  
Nanofiltration Membrane

scholarly journals Two-dimensional fractal nanocrystals templating for substantial performance enhancement of polyamide nanofiltration membrane

2021 ◽  
Vol 118 (37) ◽  
pp. e2019891118
Author(s):  
Yang Lu ◽  
Ruoyu Wang ◽  
Yuzhang Zhu ◽  
Zhenyi Wang ◽  
Wangxi Fang ◽  
...  
Keyword(s):  
Performance Enhancement ◽  
Interfacial Polymerization ◽  
Water Flux ◽  
Practical Method ◽  
Curing Temperature ◽  
Polymerization Process ◽  
Nanofiltration Membrane ◽  
Two Dimensional ◽  
Fractal Structures ◽  
Templating Method

In this study, we report the emergence of two-dimensional (2D) branching fractal structures (BFS) in the nanoconfinement between the active and the support layer of a thin-film-composite polyamide (TFC-PA) nanofiltration membrane. These BFS are crystal dendrites of NaCl formed when salts are either added to the piperazine solution during the interfacial polymerization process or introduced to the nascently formed TFC-PA membrane before drying. The NaCl dosing concentration and the curing temperature have an impact on the size of the BFS but not on the fractal dimension (∼1.76). The BFS can be removed from the TFC-PA membranes by simply dissolving the crystal dendrites in deionized water, and the resulting TFC-PA membranes have substantially higher water fluxes (three- to fourfold) without compromised solute rejection. The flux enhancement is believed to be attributable to the distributed reduction in physical binding between the PA active layer and the support layer, caused by the exertion of crystallization pressure when the BFS formed. This reduced physical binding leads to an increase in the effective area for water transport, which, in turn, results in higher water flux. The BFS-templating method, which includes the interesting characteristics of 2D crystal dendrites, represents a facile, low-cost, and highly practical method of enhancing the performance of the TFC-PA nanofiltration membrane without having to alter the existing infrastructure of membrane fabrication.

scholarly journals Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties

RSC Advances ◽  
2018 ◽  
Vol 8 (27) ◽  
pp. 15102-15110 ◽  
Author(s):  
Li-Fen Liu ◽  
Xiang Huang ◽  
Xiao Zhang ◽  
Ke Li ◽  
Yan-Li Ji ◽  
...  
Keyword(s):  
Interfacial Polymerization ◽  
Aromatic Polyamide ◽  
Good Stability ◽  
Nanofiltration Membrane ◽  
Antifouling Property ◽  
Dye Rejection ◽  
Polymerization Method

TMAAM, a new dendrimer, was used to modify the conventional aromatic polyamide NF membrane via interfacial polymerization method, and the result TMAAM-based semi-aromatic polyamide NF membrane strong dye rejection, favourable antifouling property and good stability.

An ultrahighly permeable-selective nanofiltration membrane mediated by an in situ formed interlayer

2020 ◽  
Vol 8 (10) ◽  
pp. 5275-5283 ◽  
Author(s):  
Yufan Hao ◽  
Quan Li ◽  
Benqiao He ◽  
Bo Liao ◽  
Xianhui Li ◽  
...  
Keyword(s):  
Interfacial Polymerization ◽  
Nanofiltration Membrane

An interlayer is in situ formed to regulate the morphologies and thickness of the polyamide layer during a chitosan assisted interfacial polymerization. The resulted NF membrane exhibits an ultrahigh permeability without compromising on selectivity.

Preparation and properties of polyamide/titania composite nanofiltration membrane by interfacial polymerization

Desalination ◽  
2014 ◽  
Vol 352 ◽  
pp. 38-44 ◽  
Author(s):  
Qiao Wang ◽  
Guang-shan Zhang ◽  
Zhan-shuang Li ◽  
Sheng Deng ◽  
Han Chen ◽  
...  
Keyword(s):  
Interfacial Polymerization ◽  
Nanofiltration Membrane

scholarly journals Zwitterion Co-Polymer PEI-SBMA Nanofiltration Membrane Modified by Fast Second Interfacial Polymerization

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 269 ◽  
Author(s):  
Yu-Hsuan Chiao ◽  
Tanmoy Patra ◽  
Micah Belle Marie Yap Ang ◽  
Shu-Ting Chen ◽  
Jorge Almodovar ◽  
...  
Keyword(s):  
Thin Film ◽  
Wastewater Treatment ◽  
Large Scale ◽  
Interfacial Polymerization ◽  
Antibacterial Properties ◽  
Operating Conditions ◽  
Nanofiltration Membrane ◽  
Nanofiltration Membranes ◽  
Film Composite ◽  
Thin Film Composite

Nanofiltration membranes have evolved as a promising solution to tackle the clean water scarcity and wastewater treatment processes with their low energy requirement and environment friendly operating conditions. Thin film composite nanofiltration membranes with high permeability, and excellent antifouling and antibacterial properties are important component for wastewater treatment and clean drinking water production units. In the scope of this study, thin film composite nanofiltration membranes were fabricated using polyacrylonitrile (PAN) support and fast second interfacial polymerization modification methods by grafting polyethylene amine and zwitterionic sulfobutane methacrylate moieties. Chemical and physical alteration in structure of the membranes were characterized using methods like ATR-FTIR spectroscopy, XPS analysis, FESEM and AFM imaging. The effects of second interfacial polymerization to incorporate polyamide layer and ‘ion pair’ characteristics, in terms of water contact angle and surface charge analysis was investigated in correlation with nanofiltration performance. Furthermore, the membrane characteristics in terms of antifouling properties were evaluated using model protein foulants like bovine serum albumin and lysozyme. Antibacterial properties of the modified membranes were investigated using E. coli as model biofoulant. Overall, the effect of second interfacial polymerization without affecting the selectivity layer of nanofiltration membrane for their potential large-scale application was investigated in detail.

Study on a novel nanofiltration membrane prepared by interfacial polymerization with zwitterionic amine monomers

2013 ◽  
Vol 431 ◽  
pp. 171-179 ◽  
Author(s):  
Quan-Fu An ◽  
Wen-Dan Sun ◽  
Qiang Zhao ◽  
Yan-Li Ji ◽  
Cong-Jie Gao
Keyword(s):  
Interfacial Polymerization ◽  
Nanofiltration Membrane
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