Synthesis, characterization and performance of asymmetric polyethersulfone (PES) ultrafiltration membranes with polyethylene glycol of different molecular weights as additives

Idris, Ani; Zain, Norashikin Mat; Noordin, M.Y.

doi:10.1016/j.desal.2006.08.008

Cited by 323 publications

(198 citation statements)

References 24 publications

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“…Modifiers are often added to tailor the membrane properties, and small amounts of modifiers can significantly change the membrane performance [1]. To date, a range of materials with different properties and morphologies have been studied for their effects on phase inversion process, they include polymer additives and inorganic particles as summarized in Table 1 [2,6,[8][9][10][11][12][13][14][15][16][17][18][19][20]. For instance, nanoparticles, zero-dimensional materials, were favoured over micron-sized particles to improve polymer-filler compatibility [21].…”

Section: Introductionmentioning

confidence: 99%

Effect of addition of two-dimensional ZIF-L nanoflakes on the properties of polyethersulfone ultrafiltration membrane

Low

Razmjou

Wang

et al. 2014

Journal of Membrane Science

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A new two-dimensional zeolitic imidazolate framework with leaf-shaped morphology (ZIF-L) was incorporated into polyethersulfone (PES) ultrafiltration membranes to investigate how the ZIF nanoflakes affect functional membrane properties. The membranes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), and contact angle goniometry. The water permeability and molecular weight cut-offs (MWCO) of membranes were also determined under constant pressure filtration. Membrane fouling resistance was characterized under constant flux operation using bovine serum albumin (BSA) as foulant. The modified UF membrane with 0.5% ZIF-L loading showed around 75% increase in water flux without greatly affecting the MWCO. Also, the same membrane showed almost twice the fouling resistance improvement against BSA with more than 80% water flux recovery. The improvement was due to the combined effect of the lower zeta potential of the modified membrane, increased hydrophilicity and reduced surface roughness, which made the attachment of BSA protein on the membrane surface more difficult. These results 2 demonstrate that the addition of 2-dimensional ZIF-L nanoflakes is effective for improving polymer membrane fouling resistance and water flux.

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Section: Introductionmentioning

confidence: 99%

Effect of addition of two-dimensional ZIF-L nanoflakes on the properties of polyethersulfone ultrafiltration membrane

Low

Razmjou

Wang

et al. 2014

Journal of Membrane Science

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“…where W w is weight of wet membranes (g), W d is weight of dry membranes(g), ρ w is density of pure water at room temperature (g/cm 3 ) and V is volume of membrane in wet state(cm 3 ). In order to minimize experimental error, each membrane was measured five times and average was calculated.…”

Section: Methodsmentioning

confidence: 99%

“…Membrane formation via phase inversion with modification of material preparation and processing parameter has been intensively studied nowadays [1][2][3]. The modification and improvement of membrane structure are directly influenced by the thermodynamic and kinetics behaviour of the membrane during its formation process.…”

Section: Introductionmentioning

confidence: 99%

Effects of Water as Non-Solvent Additive on Performance of Polysulfone Ultrafiltration Membrane

Yunos

Harun

Basri

et al. 2012

AMR

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Abstract. In this work, polysulfone ultrafiltration membranes were prepared via simple phase inversion with distilled water as non-solvent additive. The main reason for the addition of water in polysulfone dope solution preparation was to enhance the membranes structure. In the dope, 15 wt. % of polysulfone was used and water was varied up to 6 wt. %. The effects of water on morphology, porosity and tensile properties were investigated in detail. From the porosity test, results showed that the addition of water has improved membrane porosity up to 53 %. The FESEM images revealed that membrane morphology has also been modified. However, the tensile properties of membrane decreased as water content increased which may be due to the porosity interaction between polysulfone/NMP with water.

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“…The final membrane structure depends on several experimental parameters: the composition of polymer solution (additives, solvent, concentration), temperature, etc. In general, additives, with low molecular weight, are used in order to affect the morphology of the membrane or as pore former such as polyvinyli pyrrolidone (PVP), polyethylene glycol (PEG), maleic acid [4][5][6][7]. However, a large number of additives with polymers that can possibly be used remain unexplored.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of PEEK-WC Membranes by Wet Phase Inversion for Ni(II) Adsorption

Bey¹,

Zakaria²,

Drioli³

2013

AJAC

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This work focuses on the preparation and characterization of flat sheet membrane based on modified polyether ether keetone (PEEK-WC). Additives, such as dibutyl phatalate (DBP) and diethyl hexyl phosphoric acid (DEHPA), were used to investigate their effect on membranes properties which are prepared by immersion precipitation. For that, several techniques were used to characterize membranes like thermal analyses, scanning electron microscopy and microanalyses. SEM pictures show versatile structures of the membranes from dense to porous membranes characterized by a sponge and finger like structure. Moreover, microanalyses of both surfaces, bottom and top surfaces show an aggregation of DEHPA at the top surface of the membrane. However, by adding dibutylphtalate, a well dispersion of the extractant was observed. Initially, micro-porous membranes were used in supported liquid membranes experiments for Ni(II) metal ions transports using diethyl hexyl phosphoric acid (DEHPA) as carrier. The extraction efficiency was very low about 28%, but enhanced by adding xylene to the organic phase. However, the modified membranes (with additives) by DBP and DEHPA were used on solid liquid extraction of Ni(II). The results show that by adding the plasticizer and the extractant, the efficiency of the system reached 63%.

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Synthesis, characterization and performance of asymmetric polyethersulfone (PES) ultrafiltration membranes with polyethylene glycol of different molecular weights as additives

Cited by 323 publications

References 24 publications

Effect of addition of two-dimensional ZIF-L nanoflakes on the properties of polyethersulfone ultrafiltration membrane

Effect of addition of two-dimensional ZIF-L nanoflakes on the properties of polyethersulfone ultrafiltration membrane

Effects of Water as Non-Solvent Additive on Performance of Polysulfone Ultrafiltration Membrane

Surface Modification of PEEK-WC Membranes by Wet Phase Inversion for Ni(II) Adsorption

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