High flux positively charged nanofiltration membranes prepared by UV-initiated graft polymerization of methacrylatoethyl trimethyl ammonium chloride (DMC) onto polysulfone membranes

Deng, Huiyu; Xu, Yuan; Chen, Qingchun; Wei, Xiuzhen; Zhu, Bao‐Ku

doi:10.1016/j.memsci.2010.10.029

Cited by 128 publications

(55 citation statements)

References 34 publications

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“…Cui et al observed non-linear growth in membrane thickness and concluded that this growth becomes insignificant after 6-bilayer depositions. In future, more membranes may be fabricated using LbL assembly, and more studies may be conducted to explore recently developed practices such as polyelectrolyte dip-coating (currently used for NF membranes) [153,154] and UV-photographing [155][156][157] to synthesize highly efficient membranes.…”

Section: Membrane Advancementmentioning

confidence: 99%

Recent advancements in forward osmosis desalination: A review

Akther¹,

Sodiq²,

Giwa³

et al. 2015

Chemical Engineering Journal

409

203

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Section: Membrane Advancementmentioning

confidence: 99%

Recent advancements in forward osmosis desalination: A review

Akther¹,

Sodiq²,

Giwa³

et al. 2015

Chemical Engineering Journal

409

203

View full text Add to dashboard Cite

“…Permeation flux and salt rejection are the major parameters determining a membrane performance and mainly depend on the nature of the active top layer and the membrane morphology [33,34]. The feasibility of chitosan coating polymer onto PA membrane surface was analyzed.…”

Section: Feasibility Of Chitosan Coating On the Pa Nf Membrane Surfacementioning

confidence: 99%

Influence of chitosan coating on the separation performance, morphology and anti-fouling properties of the polyamide nanofiltration membranes

Akbari

Derikvandi

Rostami

2015

Journal of Industrial and Engineering Chemistry

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“…Meanwhile, a variety of alternative methods to fabricate NF membranes have also been explored by researchers, including modified interfacial polymerization [12,13], grafting polymerization [14], and nanomaterials embedment [15]. Recently, the successful development of a novel class of NF hollow fiber membranes has been demonstrated, fabricated using the layer-by-layer (LbL) polyelectrolyte deposition method with chemical crosslinking [16,17].…”

Section: Introductionmentioning

confidence: 99%

Fundamentals of low-pressure nanofiltration: Membrane characterization, modeling, and understanding the multi-ionic interactions in water softening

Labban

Liu

Chong

et al. 2017

Journal of Membrane Science

152

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Recently, a novel class of low-pressure nanofiltration (NF) hollow fiber membranes, particularly suited for water softening and desalination pretreatment have been fabricated in-house using layer-by-layer (LbL) deposition with chemical crosslinking. These membranes can operate at exceedingly low pressures (2 bar), while maintaining relatively high rejections of multivalent ions. In spite of their great potential, our understanding as to what makes them superior has been limited, demanding further investigation before any large-scale implementation can be realized. In this study, the Donnan-Steric Pore Model with dielectric exclusion (DSPM-DE) is applied for the first time to these membranes to describe the membrane separation performance, and to explain the observed rejection trends, including negative rejection, and their underlying multi-ionic interactions. Experiments were conducted on a spectrum of feed chemistries, ranging from uncharged solutes to single salts, salt mixtures, and artificial seawater to characterize the membrane and accurately predict its performance. Modeling results were validated with experiments, and then used to elucidate the working principles that underlie the low-pressure softening process. An approach based on sensitivity analysis shows that the membrane pore dielectric constant, followed by the pore size, are primarily responsible for the selectively high rejections of the NF membranes to multivalent ions. Surprisingly, the softening process is found to be less sensitive to changes in membrane charge density. Our findings demonstrate that the unique ability of these membranes to exclusively separate multivalent ions from the solution, while allowing monovalent ions to permeate, is key to making this low-pressure softening process realizable.

show abstract

High flux positively charged nanofiltration membranes prepared by UV-initiated graft polymerization of methacrylatoethyl trimethyl ammonium chloride (DMC) onto polysulfone membranes

Cited by 128 publications

References 34 publications

Recent advancements in forward osmosis desalination: A review

Recent advancements in forward osmosis desalination: A review

Influence of chitosan coating on the separation performance, morphology and anti-fouling properties of the polyamide nanofiltration membranes

Fundamentals of low-pressure nanofiltration: Membrane characterization, modeling, and understanding the multi-ionic interactions in water softening

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