EFFECT OF CURING TIME ON THE PORE SIZE AND EFFECTIVE THICKNESS/POROSITY OF POLYESTER THIN FILM COMPOSITE NANOFILTRATION MEMBRANES

2016 ◽  
Vol 78 (12) ◽  
Author(s):  
K. H. Mah ◽  
H. W. Yussof ◽  
M. N. Abu Seman ◽  
A. W. Mohammad
Keyword(s):  
Thin Film ◽  
Pore Size ◽  
Interfacial Polymerization ◽  
Effective Thickness ◽  
Membrane Properties ◽  
Curing Time ◽  
Nanofiltration Membranes ◽  
Film Composite ◽  
Thin Film Composite ◽  
Minute Point

Polyester thin film composite nanofiltration membranes were synthesized on the polyethersulfone (PES) support via the interfacial polymerization between triethanolamine (TEOA) and trimesoyl chloride (TMC). Here we report the effect of curing time in the interfacial polymerization process on membrane properties like pore size and effective thickness/porosity. The membrane properties were determined based on the uncharged solute permeation test and the hypothetical mechanistic structure (pore size, effective thickness/porosity) was determined using Donnan steric pore flow model (DSPM). This study also provides information on the effect of curing time on water permeability. From the 2 minute point to 10 minute point, the membranes pore sizes were reduced and negligible changes to effective thickness/porosity suggest the occurrence of additional cross-linking reaction between aqueous and organic monomers.

scholarly journals Hydrogel assisted interfacial polymerization for advanced nanofiltration membranes

2020 ◽  
Vol 8 (6) ◽  
pp. 3238-3245 ◽  
Author(s):  
Shushan Yuan ◽  
Gang Zhang ◽  
Junyong Zhu ◽  
Natalie Mamrol ◽  
Suilin Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Aqueous Phase ◽  
Composite Membrane ◽  
Interfacial Polymerization ◽  
Nanofiltration Membranes ◽  
Film Composite ◽  
Thin Film Composite Membrane ◽  
Thin Film Composite

This study demonstrates the application of a hydrogel as the aqueous phase in interfacial polymerization for the synthesis of a thin film composite membrane with ultrahigh permeability.

Oligo-ethylene-glycol based thin-film composite nanofiltration membranes for effective separation of mono-/di-valent anions

2019 ◽  
Vol 7 (4) ◽  
pp. 1849-1860 ◽  
Author(s):  
Dan Ren ◽  
Xiao-Tian Bi ◽  
Tian-Yin Liu ◽  
Xiaolin Wang
Keyword(s):  
Thin Film ◽  
Ethylene Glycol ◽  
Pore Size ◽  
Aromatic Polyamide ◽  
Nanofiltration Membranes ◽  
Film Composite ◽  
Thin Film Composite ◽  
Effective Separation

A novel oligo-ethylene-glycol-containing semi-aromatic polyamide NF membrane with precise pore size shows effective separation for mono-/divalent anions.

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.

scholarly journals Impacts of Surface Hydrophilicity of Carboxylated Polyethersulfone Supports on the Characteristics and Permselectivity of PA-TFC Nanofiltration Membranes

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2470
Author(s):  
Yingfu Lian ◽  
Gang Zhang ◽  
Xiaojun Wang ◽  
Jie Yang
Keyword(s):  
Thin Film ◽  
Interfacial Polymerization ◽  
Molar Ratio ◽  
Nanofiltration Membranes ◽  
Surface Hydrophilicity ◽  
Film Composite ◽  
Thin Film Composite ◽  
Lower Permeability ◽  
Separation Performances ◽  
Separation Results

Our current study experimentally evaluates the impacts of surface hydrophilicity of supports on the properties of polyamide (PA) thin-film composite (TFC) nanofiltration (NF) membranes. A series of “carboxylated polyethersulfone” (CPES) copolymers with an increasing “molar ratio” (MR) of carboxyl units were used to prepare supports with diverse surface hydrophilicities by the classical nonsolvent-induced phase separation (NIPS) method. Then, the PA-TFC NF membranes were finely fabricated atop these supports by conventional interfacial polymerization (IP) reactions. The linkages between the surface hydrophilicity of the supports and the characteristics of the interfacially polymerized PA layers as well as the permselectivity of NF membranes were investigated systematically. The morphological details of the NF membranes indicate that the growth of PA layers can be adjusted through increasing the surface hydrophilicity of the supports. Moreover, the separation results reveal that the NF membrane fabricated on the relatively hydrophobic support exhibits lower permeability (7.04 L·m−2·h−1·bar−1) and higher selectivity (89.94%) than those of the ones prepared on the hydrophilic supports (14.64~18.99 L·m−2·h−1·bar−1 and 66.98~73.48%). A three-stage conceptual scenario is proposed to illustrate the formation mechanism of the PA layer in NF membranes, which is due to the variation of surface hydrophilicity of the supports. The overall findings specify how the surface hydrophilicity of the supports influences the formation of PA layers, which ultimately defines the separation performances of the corresponding NF membranes.

scholarly journals Polyimide thin film composite (TFC) membranes via interfacial polymerization on hydrolyzed polyacrylonitrile support for solvent resistant nanofiltration

RSC Advances ◽  
2017 ◽  
Vol 7 (68) ◽  
pp. 42800-42810 ◽  
Author(s):  
Shanshan Yang ◽  
Hongyan Zhen ◽  
Baowei Su
Keyword(s):  
Thin Film ◽  
High Performance ◽  
Interfacial Polymerization ◽  
Nanofiltration Membranes ◽  
Film Composite ◽  
Thin Film Composite

High performance solvent resistant nanofiltration membranes are fabricated via interfacial polymerization between m-phenylenediamine and 1,2,4,5-benzenetetra acylchloride on hydrolyzed polyacrylonitrile supports followed by chemical imidization.

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