Enhancement in hydrophilicity of different polymer phase-inversion ultrafiltration membranes by introducing PEG/Al2O3 nanoparticles

García-Ivars, Jorge; Alcaina–Miranda, M.I.; Iborra–Clar, M.I.; Mendoza–Roca, J.A.; Pastor-Alcañiz, Laura

doi:10.1016/j.seppur.2014.03.012

Cited by 122 publications

(58 citation statements)

References 62 publications

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“…This value shows the semi-hydrophobic nature of PES and is in accordance with the studies of other researchers [37,38,60]. As can be observed in this figure, an increasing metal nanoparticles concentration caused a decline in the contact angle values of the different membranes, indicating an increase in the surface hydrophilicity due to the high affinity of nanoparticles for water compared to PES material.…”

Section: Morphological Studysupporting

confidence: 91%

“…Aqueous solutions of PEG (1000 ppm) with different molecular weights from 6 to 20 kDa were individually prepared using ultrapure water and used as feed solutions in the above-mentioned filtration setup. The PEG concentration was selected according to previous studies about MWCO determination [36,37]. After compacting each membrane at 4 bar, experiments were carried out at different ΔP ranging from 1 to 4 bar.…”

Section: Filtration Experimentsmentioning

confidence: 99%

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Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2015

Journal of Membrane Science

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ElsevierGarcía Ivars, J.; Iborra Clar, MI.; Alcaina Miranda, MI.; Van Der Bruggen, B. (2015). Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes. ABSTRACTInorganic nanoparticles have been applied as additive in membrane synthesis for improving different properties from the base polymer such as hydrophilicity, fouling resistance or permselectivity. To investigate the changes caused by the presence of the inorganic nanoparticles in the formation of the membrane structure, two different metallic compounds with opposite hydrophilicity were used as additives: hydrophilic zinc oxide (ZnO) and hydrophobic tungsten disulphide (WS 2 ). For this purpose, the effect of these metal nanoparticles at ultra-low concentrations (0.05 and 0.25 wt% metal nanoparticles/polymer ratio) in the preparation of flat-sheet membranes based on polyethersulphone (PES) by immersion-precipitation method was investigated. Nmethyl-2-pyrrolidone (NMP) was used as solvent. The influence of both metal nanoparticles on the characteristics and permselective properties of PES membranes was studied with microscopic observations, contact angle measurements, and filtration experiments. Although the incorporation of metal nanoparticles could turn the system into thermodynamically unstable, the demixing process during formation of membranes was slightly delayed, suppressing the macrovoid formation (remarkably using WS 2 ).Regardless the nature of the metal nanoparticles, results showed an overall improvement in membrane hydrophilicity and permselectivity by adding metal nanoparticles compared to the control PES membrane, demonstrating that the behaviour of both metal nanoparticles at ultra-low concentrations was very similar.

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Section: Morphological Studysupporting

confidence: 91%

Section: Filtration Experimentsmentioning

confidence: 99%

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2015

Journal of Membrane Science

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“…Hydraulic permeability (P h ) was obtained from the slope of the plot of J and ΔP and was calculated using Eq.4 32 …”

Section: Pure Water Flux (Pwf)mentioning

confidence: 99%

“…The EWC is considered as a parameter that indirectly indicates the degree of hydrophilicity of a membrane and it is closely related to the porosity. The pores on the surface as well as cavities in the sublayer are responsible for accommodating water in the membranes 30,32 . It may be found from the table that a small increase in EWC is observed with increasing the rate of MC in membranes, and the values are around 74-75%.…”

Section: Equilibrium Water Content Porosity and Hydrophilicitymentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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Polymer solutions of polysulfone (PSf) and methylcellulose (MC) in 1-methyl-2-pyrrolidone (NMP) were used to prepare ultrafiltration membranes by the phase inversion technique via immersion precipitation. The effect of MC additive on the structure and performances of the membranes was studied. The obtained membranes were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR-ATR), equilibrium water content (EWC), water contact angle, porosity and ultrafiltration experiments of polyethylene glycol solutions. It was found that all the PSf/MC membranes had higher porosity, more hydrophilic surface and more vertically finger like pores than PSf membrane. With an increase in MC content in the casting solution from 0.5% to 1.5%, the hydraulic permeability increases from 17.17 to 118.46 L.m -2 .h -1 .bar -1 , while the rejection decreases from 91.82% to 64.45% with PEG 35000. DSC scan and FTIR analysis confirmed that methylcellulose was trapped in the membranes matrix.

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“…Water permeation properties of the modified membranes were tested using a standard cross-flow UF setup, which is described in an earlier paper [17]. (5) where V was the volume of permeate water (m 3 ), A m was the effective surface area of the membrane (m 2 ) and t was the permeation time (h).…”

Section: Membrane Performance 241 Water Permeationmentioning

confidence: 99%

Surface photomodification of flat-sheet PES membranes with improved antifouling properties by varying UV irradiation time and additive solution pH

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2016

Chemical Engineering Journal

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Enhancement in hydrophilicity of different polymer phase-inversion ultrafiltration membranes by introducing PEG/Al2O3 nanoparticles

Cited by 122 publications

References 62 publications

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Surface photomodification of flat-sheet PES membranes with improved antifouling properties by varying UV irradiation time and additive solution pH

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