scholarly journals Fabrication of functionalized halloysite nanotube blended ultrafiltration membranes for high flux and fouling resistance

2019 ◽  
Vol 25 (5) ◽  
pp. 771-778 ◽  
Author(s):  
Shinyun Park ◽  
Eunmok Yang ◽  
Hosik Park ◽  
Heechul Choi
Keyword(s):  
Pure Water ◽  
Water Flux ◽  
Halloysite Nanotubes ◽  
Interfacial Interaction ◽  
Fouling Resistance ◽  
Intrinsic Properties ◽  
Membrane Performance ◽  
Pure Water Flux ◽  
Improved Performance ◽  
Pes Membrane

Halloysite nanotubes (HNTs) were functionalized using 3-aminopropyltriethoxysilane (APTES) and incorporated into polyethersulfone (PES) membranes to improve the hydrophilicity of the membranes as well as the interfacial interaction between HNTs and the polymer matrix. The intrinsic properties, permeability, and selectivity of the prepared membranes were analyzed to evaluate the membrane performance. In addition, humic acid (HA) fouling experiments were conducted to measure the antifouling properties of the fabricated membranes. As HNTs and functionalized HNTs (f-HNTs) contents are increased, hydrophilicity and mechanical strength were enhanced, and membranes with f-HNTs showed further improved performance. The pure water flux of membranes with 2% HNTs and f-HNT was 7.5 times higher than that of a pristine PES membrane without a trade-off relation between the water flux and HA rejection. The membranes with f-HNTs showed the highest antifouling properties compared to membranes with HNTs because enhanced hydrophilicity played a key role in preventing accumulation of HA.

scholarly journals Synthesis, characterization and filtration performance of the polyvinylidene fluoride membrane modified by poly(methyl ethacrylate-co-2-acrylamido-2-methylpropane sulfonic acid)

2018 ◽  
Vol 19 (4) ◽  
pp. 1279-1285
Author(s):  
Q. Y. Zhang ◽  
Q. An ◽  
Y. G. Guo ◽  
J. Zhang ◽  
K. Y. Zhao
Keyword(s):  
Sulfonic Acid ◽  
Polyvinylidene Fluoride ◽  
Phase Inversion ◽  
Pure Water ◽  
Water Flux ◽  
Contact Angles ◽  
Fouling Resistance ◽  
Inversion Process ◽  
Pvdf Membrane ◽  
Pure Water Flux

Abstract To enhance the anti-fouling and separating properties of polyvinylidene fluoride (PVDF) membranes, an amphiphilic copolymer of methyl methacrylate and 2-acrylamido-2-methylpropane sulfonic acid, poly(MMA-co-AMPS), was designed and synthesized. Through a phase-inversion process, the poly(MMA-co-AMPS) were fully dispersed in the PVDF membrane. The properties of membrane including the surface and cross-section morphology, surface wettability and fouling resistance under different pH solutions were investigated. Compared to the unmodified PVDF membranes, the contact angles of modified PVDF membranes decreased from 80.6° to 71.6°, and the pure water flux increased from 54 to 71 L·m−2·h−1. In addition, the hybrid PVDF membrane containing 0.5 wt% copolymers demonstrated an larger permeability, better fouling resistance and higher recovery ratio via pure water backlashing, when it was compared with the other blend membranes, and the virgin one in the cyclic test of anti-fouling. The modified membranes with the copolymers possessed an outstanding performance and may be used for further water treatment applications.

scholarly journals Effect of Kenaf MCC composition on Thin Film Composite membrane for NaCI Rejection

2019 ◽  
Vol 258 ◽  
pp. 04003
Author(s):  
Azman Ismail ◽  
Ramlah Mohd Tajuddin ◽  
Hamizah Mohktar ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Thin Film ◽  
Interfacial Polymerization ◽  
Pure Water ◽  
Water Flux ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Sem Images ◽  
Water Contact ◽  
Membrane Performance ◽  
Pure Water Flux

A modified thin film PSf-MCC reverse osmosis membrane was prepared by interfacial polymerization between aqueous MPD and TMC as the organic monomer. Aim of this study is to determine the effect of MCC in membrane formulation and fabrication. The surface and cross section morphology of TFC PSF/MCC membrane shows MCC particle which able to improve hydrophilicity of the membrane. The SEM images showed dense and porous structure of the MCC incorporated membranes. In addition, the water contact angle measurement also confirmed the increased hydrophilicity of the modified membranes. The effect of MCC on membrane matric influence the membrane performance in terms of NaCl rejection and pure water flux. Results showed that TFC PSf/MCC membrane shows NaCl rejection up to 98.9% compared with TFC PSf membrane. TFC PSf/MCC membrane also showed the highest pure water flux which is 3.712 Lm2/hr compare with TFC PSF membrane which is 3.606 Lm2/hr. The overall result proved that MCC particle could improve membrane hydrophilicity hence, increased pure water flux and salt rejection.

scholarly journals Fabrication and Assessment of ZnO Modified Polyethersulfone Membranes for Fouling Reduction of Bovine Serum Albumin

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Tshepo Duncan Dipheko ◽  
Kgabo Philemon Matabola ◽  
Kate Kotlhao ◽  
Richard M. Moutloali ◽  
Michael Klink
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Zno Nanoparticles ◽  
Bovine Serum ◽  
Pure Water ◽  
Water Flux ◽  
Composite Membranes ◽  
Optimal Performance ◽  
Fouling Resistance ◽  
Pure Water Flux

ZnO/PES composite membranes were fabricated by phase inversion method using DMAc as a solvent. The structure of ZnO was investigated using TEM, SEM, XRD, and TGA. TEM images of ZnO nanoparticles were well-defined, small, and spherically shaped with agglomerated nanoparticles particles of 50 nm. The SEM and XRD results were an indication that ZnO nanoparticles were present in the prepared ZnO/PES composites membranes. Contact angle measurements were used to investigate surface structures of the composite membranes. The amount of ZnO nanoparticles on PES membranes was varied to obtain the optimal performance of the composite membranes in terms of pure water flux, flux recovery, and fouling resistance using the protein bovine serum albumin (BSA) as a model organic foulant. The results showed that addition of ZnO to PES membranes improved the hydrophilicity, permeation, and fouling resistance properties of the membranes. Pure water flux increased from a low of 250 L/m2h for the neat membrane to a high of 410 L/m2h for the composite membranes. A high flux recovery of 80–94% was obtained for the composite membranes. The optimal performance of the composite membranes was obtained at 1.5 wt% of ZnO.

scholarly journals Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1446 ◽  
Author(s):  
Nyiko M. Chauke ◽  
Richard M. Moutloali ◽  
James Ramontja
Keyword(s):  
Contact Angle ◽  
Water Permeability ◽  
Brackish Water ◽  
Water Flux ◽  
Fouling Resistance ◽  
Salt Rejection ◽  
Membrane Performance ◽  
Polyethersulfone Membrane ◽  
Dead End ◽  
Pes Membrane

ZSM-22/polyethersulfone membranes were prepared for salt rejection using modelled brackish water. The membranes were fabricated via direct ZSM-22 incorporation into a polymer matrix, thereby inducing the water permeability, hydrophilicity and fouling resistance of the pristine polyethersulfone (PES) membrane. A ZSM-22 zeolite material with a 60 Si/Al ratio, high crystallinity and needle-like morphologies was produced and effectively used as a nanoadditive in the development of ZSM-22/PES membranes with nominal loadings of 0–0.75 wt.%. The characterisation and membrane performance evaluation of the resulting materials with XRD, BET, FTIR, TEM, SEM and contact angle as well as dead-end cell, respectively, showed improved water permeability in comparison with the pristine PES membrane. These ZSM-22/PES membranes were found to be more effective and superior in the processing of modelled brackish water. The salt rejection of the prepared membranes for NaCl and MgCl2 was effective, while they exhibited quite improved water flux and flux recovery ratios in the membrane permeability and anti-fouling test. This indicates that different amounts of ZSM-22 nanoadditives produce widely divergent influences on the performance of the pristine PES membrane. As such, over 55% of salt rejection is observed, which means that the obtained membranes are effective in salt removal from water.

scholarly journals Synthesizing Ag/PDA/PES Antibacterial Membrane for Natural Organic Molecules Removal

2018 ◽  
Vol 65 ◽  
pp. 05023 ◽  
Author(s):  
Kok Poh Wai ◽  
Chai Hoon Koo ◽  
Yean Ling Pang ◽  
Woon Chan Chong ◽  
Woei Jye Lau
Keyword(s):  
Membrane Surface ◽  
Pure Water ◽  
Water Flux ◽  
X Ray Diffraction ◽  
X Ray ◽  
Membrane Performance ◽  
Dope Solution ◽  
And Performance ◽  
Pes Membrane ◽  
Contact Angle Analysis

Silver nanoparticles (NP) was successfully immobilized on polydopamine (PDA) supported polyethersulfone (PES) membrane via a redox reaction. Polyvinylpyrrolidone (PVP) was added into membrane dope solution as a pore-forming agent. Four pieces of membranes (M1, M2, M3 and M4) were fabricated with different active layer coatings to compare their morphological and performance properties. The differences between each sample were highlighted as follow: M1 (pristine PES), M2 (PES+PVP), M3 (PDA/PES+PVP) and M4 (Ag/PDA/PES+PVP). All membranes were characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction and contact angle analysis. The membrane performance was examined using pure water permeability (PWP) test, antibacterial test and humic acid (HA) rejection test. Pristine M1 membrane showed that PWP of 27.16 LMH/bar and HA rejection of 84 %. In this study, it was found that the addition of PVP as a pore agent into the membrane M2 increased water flux but slightly deteriorated HA rejection. Coating of PDA on M3 and immobilizing silver NP on M4 membrane surface have improved HA rejection but compromised PWP. The results showed that membrane M4 carried excellent antibacterial property and highest HA rejection among all fabricated membranes.

The Effect of Polyethelene Glycol on The Performance of Polysulfone Membrane Blend with Silica From Rice Husk

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
Mohd Riduan Jamalludin ◽  
Zawati Harun ◽  
Hatijah Basri ◽  
Muhamad Zaini Yunos ◽  
Muhamad Fikri Shohur ◽  
...  
Keyword(s):  
Humic Acid ◽  
Rice Husk ◽  
Pure Water ◽  
Water Flux ◽  
Polysulfone Membrane ◽  
Membrane Performance ◽  
Membrane Characterization ◽  
Phase Inversion Technique ◽  
Pure Water Flux ◽  
Polyethelene Glycol

In the present work, the effect of rice husk silica (RHS) on the performance of polysulfone (PSf) blended with polyethylene glycol (PEG) membranes were investigated. The hybrid ultrafiltration membranes were prepared by phase inversion technique. The membrane performance was analyzed by using pure water flux, humic acid for the rejection test and followed by the membrane characterization. Results showed that PEG increased membrane pure water flux to 621.212 LMH and rejection humic acid at and 98%. The analysis of SEM revealed that PEG obviously changed the microstructure of the membrane especially at the top and sub layer.

Synergy Effect of PEG and LiCl as Additives on PVDF UF Membrane Performance

2014 ◽  
Vol 1048 ◽  
pp. 448-451 ◽  
Author(s):  
Li Qing Zhang ◽  
Gang Zhang
Keyword(s):  
Tensile Strength ◽  
Pure Water ◽  
Water Flux ◽  
High Protein ◽  
Synergy Effect ◽  
Membrane Performance ◽  
Pure Water Flux ◽  
Uf Membranes ◽  
Protein Rejection

PVDF flat UF membranes were optimized to get relative high protein rejection with high permeation fluxes. The effects of PVDF content and the additive species on the membrane performance were investigated. The synergy effect between LiCl and PEG8kcan increase the flux remarkably than the single additive. With the increase of PEG8kcontent, the synergy effect of LiCl decreased. In addition, when the PEG8kcontent was higher than LiCl, the pure water flux was relatively high, while with the increasing of LiCl content, the membrane tensile strength was increased. The addition of PEG8kand LiCl should constitute an appropriate method to prepare a series of membranes with controlled flux.

scholarly journals Design and Construction of Ag@MOFs Immobilized PVDF Ultrafiltration Membranes with Anti-bacterial and Antifouling Properties

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Wentao Xu ◽  
Huaqiang Zhuang ◽  
Zehai Xu ◽  
Mianli Huang ◽  
Shangchan Gao ◽  
...  
Keyword(s):  
Composite Material ◽  
Pure Water ◽  
Water Flux ◽  
Antibacterial Properties ◽  
Analytical Techniques ◽  
High Water ◽  
Fouling Resistance ◽  
Ultrafiltration Membranes ◽  
Water Contact ◽  
Pure Water Flux

In this work, Ag nanoparticle loading Mg(C10H16O4)2(H2O)2(Ag@MOF) composite material was successfully prepared by a facile strategy, and subsequently Ag-MOFs were used to modify the PVDF ultrafiltration membranes to obtain fouling resistance and higher water flux. The as-prepared PVDF membranes were systematically characterized by a series of analytical techniques such as Water Contact Angle (CA), Scanning Electron Microscopy (SEM), and SEM-mapping. Furthermore, the performance of membranes on antibacterial properties, the pure water flux, and fouling resistance was investigated in detail. Those results showed that the membrane modified by Ag@MOFs containing 30% Ag had the higher anti-bacterial performance, and the clear zone could be increased to 10 mm in comparison with that of blank membrane. Meanwhile, the pure water flux of Ag@MOF membranes increased from 85 L/m2 h to 157 L/m2 h, and the maximum membrane flux recovery rate (FRR) of 95.7% was obtained using SA as pollutant, which is attributed to the introduction of Ag@MOF composite material. Based on the above experimental results, it can be found that the Ag-MOF membranes displayed the excellent antibacterial activity, high water flux, and fine fouling resistance. This work provides a facile strategy to fabricate the Ag@MOFs modified membranes, and it shows an excellent anti-bacterial and water flux performance.

Effect of PVP content and polymer concentration on polyetherimide (PEI) and polyacrylonitrile (PAN) based ultrafiltration membrane fabrication and characterization

2018 ◽  
Vol 2017 (2) ◽  
pp. 329-339 ◽  
Author(s):  
Sevgi Güneş-Durak ◽  
Türkan Ormancı-Acar ◽  
Neşe Tüfekci
Keyword(s):  
Pure Water ◽  
Polymer Concentration ◽  
Water Flux ◽  
Inversion Method ◽  
Membrane Thickness ◽  
Average Roughness ◽  
Membrane Performance ◽  
Membrane Fabrication ◽  
Pure Water Flux ◽  
Phase Inversion Method

Abstract In this study, four different membranes were fabricated by using polyetherimide and polyacrylonitrile polymers, N-methyl-2-pyrrolidone and polyvinylpyrrolidone (PVP) via phase inversion method to improve the membrane performance in fruit juice wastewater (FJWW) treatment. The addition of PVP to the casting solution increased membrane hydrophilicity, water content, contact angle, porosity, Fourier transform infrared spectroscopy peaks, membrane thickness, average roughness and viscosity of cast solutions compared to the bare membrane. It can be said that the addition of a lower polymer concentration and PVP intensively increases the pure water flux of the membrane. However, as the flux increased, a small decrease in FJWW rejection was observed.

Fouling Characterization of Polysulfone-Grafted-Methyl Methacrylate Membrane

2013 ◽  
Vol 465-466 ◽  
pp. 819-823 ◽  
Author(s):  
Muhamad Zaini Yunos ◽  
Zawati Harun ◽  
Hatijah Basri ◽  
Hariati Taib ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Methyl Methacrylate ◽  
Bovine Serum ◽  
Pure Water ◽  
Water Flux ◽  
Optimum Time ◽  
Membrane Performance ◽  
Pure Water Flux

This study investigates the effects of different grafting time on the polysulfone grafted methyl methacrylate (PSf-g-MMA) membrane performance. PSf-g-MMA was successfully prepared via UV radiation method. Methyl methacrylate (MMA) and benzophenon (BP) were used as a monomer and initiator respectively. Membrane performances were measured based on permeation and rejection of bovine serum albumin (BSA). Degree of grafting was found to increase as grafting time increases and the optimum time was found at 100 minutes. The results revealed that the pure water flux and rejection were significantly improved with the addition of grafting time. The present of MMA also were found to improve fouling properties of the membrane.

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