Fouling control on microfiltration/ultrafiltration membranes: Effects of morphology, hydrophilicity, and charge

Kumar, Rajesha; Ismail, Ahmad Fauzi

doi:10.1002/app.42042

Cited by 205 publications

(107 citation statements)

References 173 publications

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“…Fouling is affected by hydrodynamic conditions, membrane properties, and feed solution properties. A dependence of fouling on membrane surface roughness has been experimentally and theoretically observed . These studies focused on randomly rough surfaces, but recent research has found a correlation between fouling resistance and induced regular surface roughness .…”

Section: Introductionmentioning

confidence: 99%

Roll‐to‐roll nanoimprint lithography of ultrafiltration membrane

Hutfles

Chapman

Pellegrino

2017

J of Applied Polymer Sci

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Nanoimprinting of a commercial, as supplied, polyethersulfone ultrafiltration membrane has been carried out for the first time using a roll‐to‐roll (R2R) process. To support this processing approach, we also developed a reusable flexible polyetherimide mold. We were able to pattern membrane at room temperature (∼21 °C) due to the high pressures (22 MPa) applied during the low contact times (<2 s) inherent to R2R imprinting. N2 permeance (L m−2 h−1 bar−1) testing was used as an indicator to verify retention of membrane porosity and to guide selection of imprinting parameters during initial screening studies. Further measurements showed the N2 and (scaled) deionized water permeances to have a 0.97 correlation coefficient. We scaled up the size of patterned membranes to as large as 226 cm2 area, thereby demonstrating the plausibility of continuously patterning commercial ultrafiltration membranes. We also investigated pattern stability versus aqueous heat treatment and found that time, temperature, and imparted strain (during patterning) may all influence stability, but no evidence of pattern loss was observed in electron micrographs after our filtration experiments. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45993.

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Section: Introductionmentioning

confidence: 99%

Roll‐to‐roll nanoimprint lithography of ultrafiltration membrane

Hutfles

Chapman

Pellegrino

2017

J of Applied Polymer Sci

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“…This deposition, also termed membrane fouling, causes a decrease in the water flux that subsequently requires an increase in the frequency of back washing and membrane maintenance. This combination limits the lifetime of the membranes and reduces the cost efficiency . Membrane fouling can be reduced through modifications to the membrane, such as adding hydrophilic polymers …”

Section: Introductionmentioning

confidence: 99%

Characterization of PVC‐soy protein nonwoven mats prepared by electrospinning

et al. 2018

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Poly(vinyl chloride) (PVC) is one of the most common polymers used in the water treatment industry due to outstanding hydrophobicity and mechanical strength. Generating eco‐friendly membranes derived from natural polymers has gained attention, particularly for water purification and producing potable water. In this study, nonwoven mats were prepared by electrospinning polymer solutions. Mats with a tailorable hydrophilicity were prepared by electrospinning solution mixtures containing PVC and an eco‐friendly, hydrophilic natural polymer: soy protein. As the viscosity of the solution decreased, the average fiber diameter, and average pore surface area reduced. However, when the PVC concentration remained constant and the soy protein concentration increased, the viscosity decreased and average fiber diameter became reduced, while the average pore diameter remained relatively constant. The mats with volumetric ratios of PVC:soy protein of 85:15 and 80:20 displayed optimal characteristics suitable for mat fabrication based on the fiber diameter and average pore surface area. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2737–2744, 2018

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“…In general, to enhance the membrane antifouling property, the surface modification is potentially the most sustainable solution. The idea is to introduce hydrophilic groups with suitable charged functionality onto membrane surface . Recently, various strategies have been proposed in the development of fouling resistance of the TFC‐PA membranes, particularly through either surface coating or grafting of hydrophilic, brush‐like or hyperbranched, hydrogels, or zwitterionic polymers.…”

Section: Introductionmentioning

confidence: 99%

Photo‐induced grafting of poly(ethylene glycol) onto polyamide thin film composite membranes

Ngo

Mori

Tran

2017

J of Applied Polymer Sci

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In this study, the surface grafting of poly(ethylene glycol) (PEG) onto commercial polyamide thin film composite (TFC‐PA) membranes was carried out, using ultraviolet photo‐induced graft polymerization method. The attenuated total reflection Fourier transform infrared spectra verify a successful grafting of PEG onto the TFC‐PA membrane surface. The scanning electron microscope and atomic force microscope analyses demonstrate the changes of the membrane surface morphology due to the formation of the PEG‐grafted layer on the top. The contact angle measurements illustrate the increased hydrophilicity of the TFC‐PA‐g‐PEG membrane surfaces, with a significantly reduced water contact angles compared to the unmodified one. Consequently, the separation performance of the PEG‐grafted membranes is highly improved, with a significant enhancement of flux at a great retention for removal of the different objects in aqueous feed solutions. In addition, the antifouling property of the modified membranes is also clearly improved, with the higher maintained flux ratios and the lower irreversible fouling factors compared to the unmodified membrane. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45454.

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Fouling control on microfiltration/ultrafiltration membranes: Effects of morphology, hydrophilicity, and charge

Cited by 205 publications

References 173 publications

Roll‐to‐roll nanoimprint lithography of ultrafiltration membrane

Roll‐to‐roll nanoimprint lithography of ultrafiltration membrane

Characterization of PVC‐soy protein nonwoven mats prepared by electrospinning

Photo‐induced grafting of poly(ethylene glycol) onto polyamide thin film composite membranes

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