Surface modification of polyethersulfone ultrafiltration (PES-UF) membrane using myoglobin as modifying agent

Ali, Nora’aini; Tari, Saidatul Syaima Mat

doi:10.1080/19443994.2012.696820

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…An increasing pattern of permeate water flux was observed with increase in the concentration of the Fe 2 O 3 nanoparticle upto 0.5 wt%. This can be explained by the presence of finger like support layer in the membrane as revealed by the SEM micro graphs [11,37]. However, the water flux decreased for PES/CA blend membranes with more than 0.5 wt% Fe 2 O 3 nanoparticles.…”

Section: Water Uptakementioning

confidence: 97%

“…Polyethersulfone (PES) is widely used in the synthesis of ultra filtration membrane for treating water and wastewater [6,7]. Polyethersulfone is a highly stable polymer in terms of material characteristics [8,9] exhibiting splendid film forming and mechanical properties combined with excellent thermal, oxidative and hydrolytic strength [10,11]. Cellulose acetate (CA) membranes have good toughness and better fouling resistance as compared to PES and an appreciable desalting behavior [6].…”

Section: Introductionmentioning

confidence: 99%

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Iron oxide modified polyethersulfone/cellulose acetate blend membrane for enhanced defluoridation application

Evangeline

Pragasam²,

Rambabu³

et al. 2019

DWT

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Fluoride removal in drinking water is usually performed through cost and energy intensive membrane techniques such as reverse osmosis, dialysis and electro-dialysis. Defluoridation using an effective and low cost ultra filtration membrane system is reported in this work. Iron (III) oxide (Fe 2 O 3) nanoparticles modified polyethersulfone (PES)/cellulose acetate (CA) blend membranes were fabricated by phase inversion method. Composite membranes were prepared by incorporating incremental amounts of Fe 2 O 3 nanoparticles. Synthesized membranes were analysed for morphological studies and ultra filtration characteristics. It was observed that the inclusion of iron oxide nanoparticles influenced the membrane structure resulting in enhanced ultra filtration properties. All of the iron oxide nanoparticles incorporated PES/CA membranes possessed increased hydrophilicity, porosity, water uptake and pure water flux as compared to pristine PES membrane. Membrane with 0.5 wt% Fe 2 O 3 nanoparticles exhibited a maximum water flux of 156 L m-2 h-1. Fluoride removal performance confirmed the defluoridation potential of the Fe 2 O 3 nanoparticles blended PES/CA membranes. Maximum fluoride removal efficiency of 70.3% was observed for a single ultra filtration run. SEM and AFM examinations showed the structural alterations in the composite membranes due to the nanoparticles addition. Reusability studies confirmed the enhanced durability of the blended membrane. Domestic application of the composite membrane was carried out by assessing its fluoride removal ability in natural water samples obtained from fluoride endemic area.

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Section: Water Uptakementioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Iron oxide modified polyethersulfone/cellulose acetate blend membrane for enhanced defluoridation application

Evangeline

Pragasam²,

Rambabu³

et al. 2019

DWT

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show abstract

“…Specifically, researchers have modified the surface of the membrane, or they have integrated molecules into the body of the membrane. Membranes coated with hydrophilic polymers, reactive nanomaterials, or nanotopographic features offer a number of advantages over their mixed-matrix counterparts, such as concentrating the active material at the surface of the membrane and tailoring an already optimized ultrafiltration membrane. − Unfortunately, surface modifications that effectively advance one property, for example, increasing the flux of the membrane, often impede a different property, such as selectivity. − Therefore, a different approach that alters ultrafiltration membranes without adversely impacting their flux or selectivity is needed.…”

Section: Introductionmentioning

confidence: 99%

Ultrafiltration Membranes Enhanced with Electrospun Nanofibers Exhibit Improved Flux and Fouling Resistance

Dobosz

Kuo-Leblanc

Martin

et al. 2017

Ind. Eng. Chem. Res.

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In this study, we have improved membrane performance by enhancing ultrafiltration membranes with electrospun nanofibers. The high-porosity nanofiber layer provides a tailorable platform that does not affect the base membrane structure. To decouple the effects that nanofiber chemistry and morphology have on membrane performance, two polymers commonly used in the membrane industry, cellulose and polysulfone, were electrospun into a layer that was 50 μm thick and consisted of randomly accumulated 1-μm-diameter fibers. Fouling resistance was improved and selectivity was retained by ultrafiltration membranes enhanced with a layer of either cellulose or polysulfone nanofibers. Potentially because of their better mechanical integrity, the polysulfone nanofiber-membranes demonstrated a higher pure-water permeance across a greater range of transmembrane pressures than the cellulose nanofiber-membranes and control membranes. This work demonstrates that nanofiber-enhanced membranes hold potential as versatile materials platforms for improving the performance of ultrafiltration membranes.

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“…Prior to use, all membranes were flushed using a custom-built cross-flow cell (28 mm long, 17 mm wide, and 1.5 mm deep, with an active area of 5.44 cm 2 ) equipped with a 31 mil (0.7874 mm) low foulant spacer and a permeate carrier (Sterlitech Corporation, Kent, WA), consistent with our previous study . All tests were conducted at a flow rate of 50 mL/min enabled by a reciprocating pump (Eldex Laboratories Incorporated, Napa, CA) followed by a dampener (Cat Pumps, Minneapolis, MN). − Two distinct flushing procedures were used on the two commercial membranes following industry recommendations. To flush the Millipore membranes (29 mm × 45 mm), they were placed active side down in the cross-flow cell and flushed with DI water at a transmembrane pressure (TMP) of 1.5 bar (21.8 psi), where the TMP was held for 0.016 h to remove glycerol (a preservation substance) as confirmed by high-performance liquid chromatography (HPLC).…”

Section: Methodsmentioning

confidence: 99%

Robust, Small Diameter Hydrophilic Nanofibers Improve the Flux of Ultrafiltration Membranes

Dobosz

Kuo-Leblanc

Bowden

et al. 2021

Ind. Eng. Chem. Res.

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In this study, we systematically investigated the flux performance of ultrafiltration (UF) membranes functionalized with randomly-accumulated nanofibers. By electrospinning nanofibers from hydrophobic polysulfone (PSf) and hydrophilic cellulose (CL), we were able to explore the role that bulk nanofiber (NF) layer thickness, individual NF diameter, and intrinsic chemistry have on composite membrane flux. Additional parameters that we systematically tested include the molecular weight cut-off (MWCO) of the base membrane (10, 100, and 200 kDa), flow orientation (cross-flow versus dead-end), and the feed solution (hydrophilic water versus hydrophobic oil). Structurally, the crosslinked PSf nanofibers were more robust than the CL nanofibers, which lead to the PSfNF-UF membranes having a greater flux performance. To decouple the structural robustness from the water affinity of the fibers, we chemically modified the PSf fibers to be hydrophilic and indeed, the flux of these new composite membranes featuring hydrophilic crosslinked nanofibers were superior. In summary, the greatest increase in flux performance arises from the smallest diameter, hydrophilic nanofibers that are mechanically robust (crosslinked). We have demonstrated that electrospun nanofiber layers improve the flux performance of ultrafiltration membranes.

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Surface modification of polyethersulfone ultrafiltration (PES-UF) membrane using myoglobin as modifying agent

Cited by 9 publications

References 17 publications

Iron oxide modified polyethersulfone/cellulose acetate blend membrane for enhanced defluoridation application

Iron oxide modified polyethersulfone/cellulose acetate blend membrane for enhanced defluoridation application

Ultrafiltration Membranes Enhanced with Electrospun Nanofibers Exhibit Improved Flux and Fouling Resistance

Robust, Small Diameter Hydrophilic Nanofibers Improve the Flux of Ultrafiltration Membranes

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