scholarly journals Development of permeability properties of polyamide thin film composite nanofiltration membrane by using the dimethyl sulfoxide additive

2014 ◽  
Vol 4 (3) ◽  
pp. 174-181 ◽  
Author(s):  
Ahmad Akbari ◽  
Sayed Majid Mojallali Rostami
Keyword(s):  
Thin Film ◽  
Dimethyl Sulfoxide ◽  
Aqueous Phase ◽  
High Performance ◽  
Interfacial Polymerization ◽  
Pure Water ◽  
Water Flux ◽  
Film Composite ◽  
Chemical Structures ◽  
Thin Film Composite

A novel polyamide thin film composite (PATFC) as a nanofiltration (NF) membrane was prepared by a modified interfacial polymerization (IP) reaction. Herein trimesoyl chloride and piperazine as the reagents, dimethyl sulfoxide (DMSO) as additive and polysulfone (PSF) ultrafiltration membrane as support were used respectively. The main goal of the present study is to improve TFC membrane water flux by addition of DMSO into the aqueous phase of IP reaction, without considerable rejection loss. Morphological, roughness, and chemical structures of the PATFC membrane were analyzed by scanning electron microscopy, atomic force microscopy (AFM), and Fourier transform infrared spectroscopy (FT-IR), respectively. The AFM analysis demonstrated that as DMSO was added to the aqueous phase, the surface roughness of PATFC membrane increased. Results showed that the pure water flux of modified-PATFC membranes increased up to 46%, compared to nonmodified-PATFC membrane, while salt rejection was not sacrificed considerably. The results elucidated that the addition of DMSO leads to an increase in the number of cross-linking bonds between monomers and pore diameter, which results in enhancement of the membrane flux. Finally, the results showed that the newly developed PATFC membrane is a high-performance NF membrane which augments the efficiency of conventional PATFC membrane.

EFFECT OF PIPERAZINE (PIP) CONCENTRATION AND REACTION TIME ON THE FORMATION OF THIN FILM COMPOSITE FORWARD OSMOSIS (FO) MEMBRANE

2017 ◽  
Vol 79 (1-2) ◽  
Author(s):  
Mohammad Amirul Mohd Yusof ◽  
Mazrul Nizam Abu Seman
Keyword(s):  
Thin Film ◽  
Reaction Time ◽  
Humic Acid ◽  
Interfacial Polymerization ◽  
Pure Water ◽  
Water Flux ◽  
Forward Osmosis ◽  
Angle Measurement ◽  
Film Composite ◽  
Thin Film Composite

Nowadays, wide applications of forward osmosis (FO) technology have been huge attention in solving the water shortage problems. Hence, the performance of thin film composite (TFC) forward osmosis membrane via interfacial polymerization (IP) was studied. 2% and 1% w/v of piperazine (PIP) and 0.15% w/v of trimesoyl chloride (TMC) were reacted with 3 different reaction time (60s, 30s, and 10s). The fabricated membranes were then characterized by FTIR, contact angle measurement and FESEM. Pure water flux, humic acid rejection (represent NOM) and salt leakage were evaluated to obtain the best polyamide FO membrane. The results demonstrated that polyamide FO membranes fabricated with 2% w/v possess a higher hydrophilic properties compared to 1% w/v. In addition, regardless of monomer concentrations, at longest reaction time (60s), there is no significant change in water flux. Membrane fabricated at 60s of reaction time exhibited water flux of 1.90 LMH and 1.92 LMH for 2% w/v and 1% w/v of PIP concentrations, respectively. The same trend also observed for humic acid rejection (93.9%-94.6%). The salt leakage test revealed that the minimum salt reverse diffusion (0.01-0.02 GMH) could be achieved for membrane fabricated at longest reaction time of 60s for both PIP concentrations. As conclusion, manipulating monomer concentrations and reaction time is the main key to obtain an optimal polyamide layer with high membrane performance covering higher water flux, higher removal of humic acid and lower reverse salt diffusion.  

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.

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

RSC Advances ◽  
2015 ◽  
Vol 5 (128) ◽  
pp. 106113-106121 ◽  
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.

Tailoring the structure of polyamide thin film composite membrane with zwitterions to achieve high water permeability and antifouling property

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 98730-98739 ◽  
Author(s):  
Xiaodan Weng ◽  
Yanli Ji ◽  
Fengyang Zhao ◽  
Quanfu An ◽  
Congjie Gao
Keyword(s):  
Thin Film ◽  
Protein Adsorption ◽  
Composite Membrane ◽  
Water Permeability ◽  
Interfacial Polymerization ◽  
Water Flux ◽  
High Water ◽  
Film Composite ◽  
Thin Film Composite Membrane ◽  
Thin Film Composite

Zwitterionic membranes prepared via interfacial polymerization directly exhibit remarkably high water flux (80.3 L m−2 h−1) and protein adsorption resistance.

scholarly journals Antifouling Properties of Silver-Zinc Oxide Polyamide Thin Film Composite Membrane and Rejection of 2-Chlorophenol and 2,4-Dichlorophenol

Membranes ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 96 ◽  
Author(s):  
Kate Kotlhao ◽  
Isiaka A. Lawal ◽  
Richard M. Moutloali ◽  
Michael J. Klink
Keyword(s):  
Thin Film ◽  
Contact Angle ◽  
Zinc Oxide ◽  
Interfacial Polymerization ◽  
Pure Water ◽  
Fouling Resistance ◽  
Film Composite ◽  
Thin Film Composite ◽  
Tfc Membrane ◽  
Repulsive Forces

The silver-zinc oxide (Ag-ZnO) polyamide thin film composite (PA-TFC) membrane was prepared by interfacial polymerization. The Ag-ZnO/PA-TFC membrane was characterized by attenuated total reflectance fourier-transform infrared spectroscopy (ATR-FTIR) for polyamide functional groups and contact angle for surface hydrophilicity. The Ag-ZnO/PA-TFC membrane was further characterized by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) for morphology and surface roughness, respectively. The performance of the fabricated membrane was investigated using pure water flux, permeability, rejection, flux recovery, and fouling resistance using low molecular weight organic pollutants, 2-chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP). The results were compared to the neat (PA-TFC) membrane. It was observed that incorporation of Ag-ZnO nanocomposites into the PA-TFC membrane improved hydrophilicity, permeation, rejection, and fouling resistance properties of the membrane. The contact angle decreased from 62.8° to 54° for PA-TFC and the Ag-ZnO/PA-TFC membrane, respectively. The presence of Ag-ZnO enhanced permeability of the membrane from 0.9 (Lm−2h−1bar−1) to 1.9 (Lm−2h−1bar−1). Modification of the membrane with Ag-ZnO further showed an enhanced rejection of 2-CP and 2,4-DCP from 43% to 80% and 58% to 85%, respectively. The 2,4-DCP molecules were rejected more than 2-CP due to enhanced repulsive forces from the extra Cl ion. A high flux recovery of about 95% was achieved for the modified membrane compared to 64% for the neat membrane. The improved flux recovery was an indication of enhanced antifouling propensity.

scholarly journals Removal of multiple pesticide residues from water by low-pressure thin-film composite membrane

2020 ◽  
Vol 10 (12) ◽  
Author(s):  
Ayan Mukherjee ◽  
Romil Mehta ◽  
Soumen Saha ◽  
A. Bhattacharya ◽  
Pabitra Kumar Biswas ◽  
...  
Keyword(s):  
Thin Film ◽  
Interfacial Polymerization ◽  
Water Flux ◽  
Size Exclusion ◽  
Film Composite ◽  
Thin Film Composite ◽  
Gas And Liquid Chromatography ◽  
Pass Through ◽  
Polyamide Membrane ◽  
Trimesoyl Chloride

AbstractThe study evaluated removal efficiency of 43 pesticides from water by thin-film composite polyamide membrane indigenously prepared by interfacial polymerization of 1,3-phenylenediamine and 1,3,5 trimesoyl chloride coated on asymmetric polysulfone support. Membrane performance was evaluated by gas and liquid chromatography mass spectroscopy determination of multiple pesticides remaining in feed and permeated water following the application of pesticides each @ 0.02, 0.05, and 0.10 mg/L in de-ionized water. The membrane was most efficient in the rejection of persistent organochlorine insecticides, viz. endosulfans (100%), dichlorodiphenyltrichloroethane (95%), and hexachlorocyclohexane (92%). Out of 43 selected pesticides, 33 were removed by > 80%. Size exclusion mass transfer played a significant role for molecules to pass through the membrane as observed for endosulfan isomers, endosulfan sulphate, and difenoconazole with molecular weight > 400. Pesticide rejection was also related to hydrophobicity (Log P). Hydrophobic pesticides with log P > 4.5 were rejected by > 80%, while monocrotophos with less hydrophobicity (log P = − 0.22) exhibited poor rejection (38%). Water flux decreased with an increase in pesticide concentration. The process of pesticide filtration was optimized at 200 psi. The results indicated the potential of the membrane to remove pesticides from water.

scholarly journals Synthesis And Performance Of Thin Film Composite Nanofiltration Polyester Membrane For Removal Of Natural Organic Matter Substances

2012 ◽  
Vol 12 (1) ◽  
pp. 73
Author(s):  
N.A. Jalanni ◽  
M.N. Abu Seman ◽  
C.K. M Faizal
Keyword(s):  
Thin Film ◽  
Reaction Time ◽  
Interfacial Polymerization ◽  
Water Flux ◽  
Process Efficiency ◽  
Transmembrane Pressure ◽  
Film Composite ◽  
Thin Film Composite ◽  
And Performance ◽  
Straight Lines

Nanofiltration (NF) polyester thin-film composite (TFC) membranes have been prepared by interfacial polymerization using commercial polyethersulfone membrane support. At 6% (w/v) triethanolamine (TEAO) concentrations in the aqueous solution and a range of interfacial polymerization times in the organic solution containing trimesoyl chloride (TMC) were studied. Nanofiltration membranes were produced with varying properties through interfacial polymerization technique. The ability to use NF membranes with varying properties will improve overall process efficiency. This study has shown that through interfacial polymerization technique, the variation of reaction time as well as can affect the performance of the membrane produced. As a result, increasing the reaction time resulted in decreasing water permeabilities. Polyester with some amide group produced after interfacial polymerization occurred as shown by FT-IR spectra. Straight lines were obtained between Jw and ΔP and the water flux of distilled water shown that flux is directly proportional to transmembrane pressure (TMP). At low reaction time (5 min), the water flux has no significant effect on water permeance. So, the reaction time has a significant effect on the growth of thin film.

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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