Journal: Journal of Membrane Science

Abbreviation

J. Membr. Sci.

Publisher

Elsevier

Journal Volumes

ISSN

0376-7388

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Publications 1 - 10 of 26
  • Mass spectrometry to quantify and compare the gas barrier properties of radiation grafted membranes and Nafion (R)
    Item type: Journal Article
    Zhang, Zhuoxiang; Chattot, Raphael; Bonorand, Lukas; et al. (2014)
    Journal of Membrane Science
  • Cross flow frequency determines the physical structure and cohesion of membrane biofilms developed during gravity-driven membrane ultrafiltration of river water: Implication for hydraulic resistance
    Item type: Journal Article
    Derlon, Nicolas; Desmond, Peter; Rühs, Patrick A.; et al. (2022)
    Journal of Membrane Science
    We evaluated how intermittent shear influences the physical structure, material properties and hydraulic resistance of membrane biofilms developed during gravity-driven ultrafiltration of river water, with the ultimate goal of increasing the filtration performances. Our results indicate intermittent shear helps slowing-down the flux decline but does not help to increase the level of stabilisation of the permeate flux. After several weeks, the biofilms exposed to different shear regimes were indeed characterised by similar hydraulic resistance. But the characteristic time to achieve a stable flux increased from 7 d to 25d when increasing the shear frequency. Also, most of the hydraulic resistance (up to 95%) was governed by the base layer that remained attached after erosion tests. With increasing exposure to shear conditions, the biofilms became more cohesive and more elastic, thus resisting better to cross flow conditions. Overall, our results demonstrate that engineering membrane biofilms with a desired permeability is not feasible using intermittent shear due to significant adaptability of the biofilms to their hydraulic environment.
  • Impact of aeration shear stress on permeate flux and fouling layer properties in a low pressure membrane bioreactor for the treatment of grey water
    Item type: Journal Article
    Ding, An; Liang, Heng; Li, Guibai; et al. (2016)
    Journal of Membrane Science
  • A positively charged composite loose nanofiltration membrane for water purification from heavy metals
    Item type: Journal Article
    Peydayesh, Mohammad; Mohammadi, Toraj; Nikouzad, Sohail Kordmirza (2020)
    Journal of Membrane Science
  • A superwettable PVDF membrane with durably chelated Fe(III) for excellent photo-Fenton self-cleaning and effective oil-in-water emulsion separation
    Item type: Journal Article
    Wang, Minglei; Mu, Liuhua; Zhang, Hao; et al. (2025)
    Journal of Membrane Science
    Membrane fouling during long-term usage severely restricts the practical application of membrane separation technology for oil-in-water emulsion treatment. Underwater superoleophobic/superhydrophilic membrane with superior self-cleaning and flux recovery performance is highly desirable, owing to its high anti-fouling ability in an oil-in-water emulsion. Herein, a polyglycidyl methacrylate-/iminodiacetic acid (IDA)/Fe(III) superhydrophilic layer was fabricated onto a polyvinylidene fluoride (PVDF) microfiltration membrane via radiation-induced graft polymerization, and subsequent adsorption of Fe(III) as the photo-Fenton activation site, labeled as Fe@PVDF, in which the loading capacity of Fe(III) was 18.31 wt%. The grafted layer acts as both, an underwater superoleophobic/superhydrophilic layer (OCA˃150o) for highly effective oil-in-water emulsion separation (99.4 %) and as a photo-Fenton activation layer for self-cleaning in 10 min under visible light irradiation with high flux (⁓2300 L m−2 h−1 bar−1). The mineralization of contaminants on the membrane surface was then systematically investigated using a series of experiments, X-ray absorption fine structure (XAFS) measurements, and density functional theory (DFT) calculations, demonstrating that the Fe/IDA site with an Fe(III) atom acts as the active site with an optimal energy gap for photo-Fenton self-cleaning activation and greatly accelerates the Fe (III) to Fe (II) cycle. Moreover, our work shows a pathway for photo-Fenton self-cleaning membranes combining excellent stability (15 cycles), and satisfactory oil-in-water emulsion separation with quick and reliable flux recovery performance, revealing their huge potential application in advanced sewage treatment.
  • The influence of crosslinker on the properties of radiation-grafted films and membranes based on ETFE
    Item type: Journal Article
    Ben Youcef, Hicharn; Gürsel, Selmlye A.; Wokaun, Alexander; et al. (2008)
    Journal of Membrane Science
    Crosslinked proton-exchange membranes were prepared by radiation-induced grafting of styrene into poly(ethylene-alt-tetrafluoroethylene) (ETFE) and subsequent sulfonation. The influence of the crosslinker, divinylbenzene (DVB), on various film and membrane properties was investigated in detail. A series of grafted films and membranes were prepared at varying DVB concentrations at a fixed graft level (∼25%) for this purpose. Grafting kinetics and kinetic parameters, including initial polymerization rate (rpo), radical recombination rate (γ) and delay time (t0) at different DVB concentrations were evaluated. Moreover, resultant grafted films and membranes have been characterized with respect to their dimensional stability, chemical composition, thermal stability, crystallinity and fuel cell relevant properties. The concentration of crosslinker in the initial grafting solution was found to influence crucially the grafting reaction and graft levels. Dimensional increase, considerable especially after sulfonation, can be controlled by the introduction of DVB. Furthermore, the FTIR-ATR measurements exhibited that the grafted films were highly crosslinked within the surface near as compared to the entire bulk region. The influence of DVB on the crystallinity and thermal stability was not significant. On the contrary, the water uptake and proton conductivity of the membranes decreased substantially, while the IEC decreased slightly with increasing DVB concentration.
  • Microstructured proton-conducting membranes by synchrotron-radiation-induced grafting
    Item type: Journal Article
    Farquet, Patrick; Padeste, Celestino; Börner, Martin; et al. (2008)
    Journal of Membrane Science
  • Gas concentration polarization and transport mechanism transition near thin polymeric membranes
    Item type: Journal Article
    Droudian, Amirhossein; Lokesh, Mahesh; Youn, Seul K.; et al. (2018)
    Journal of Membrane Science
  • Mechanisms of membrane fouling during ultra-low pressure ultrafiltration
    Item type: Journal Article
    Peter-Varbanets, Maryna; Margot, Jonas; Traber, Jacqueline; et al. (2011)
    Journal of Membrane Science
  • Fabrication of flexible, aligned carbon nanotube/polymer composite membranes by in-situ polymerization
    Item type: Journal Article
    Kim, Sangil; Fornasiero, Francesco; Park, Hyung Gyu; et al. (2014)
    Journal of Membrane Science
Publications 1 - 10 of 26