Effect of LbL surface modification on characteristics and performances of cellulose acetate nanofiltration membranes

Lajimi, Ramzi Hadj; Ferjani, Ezzedine El; Roudesli, Mohamed Sadok; Deratani, A.

doi:10.1016/j.desal.2010.08.005

Cited by 47 publications

(25 citation statements)

References 31 publications

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“…manganese enrichment in the iron-manganese alloy materials [44][45][46]. CHI and ALG PEMs in contact with high concentration NaCl may experience conformation change due to the screening effect of Na þ and Cl À ions, leading to decomplexation and removal of the adsorbed CHI and ALG layers [8]. Stability of PEMs prepared without AgCl/TiO 2 addition has been studied by testing the water permeability of the membranes immediately after LbL modification, following 7-day storage in 1 M NaCl solution and 14-day storage in 1 M NaCl solution.…”

Section: Lbl Layersmentioning

confidence: 99%

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Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO 2 xerogels

Kaner

Johnson

Şeker

et al. 2015

Journal of Membrane Science

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a b s t r a c tIn this study, the layer-by-layer (LbL) assembly method was employed to modify a commercial polyethersulfone (PES) membrane by successive adsorption of chitosan and alginate as cationic and anionic polyelectrolytes. To enhance anti-biofouling property, pure, PEG mixed and PEGylated AgCl/TiO 2 xerogels were incorporated solely in the top layer of the LbL-modified membranes. Organic and biological foulings were addressed separately using alginate and Escherichia coli bacteria suspensions as the organic and biological model foulants, respectively. LbL-modifying the commercial PES membrane successively with chitosan and alginate polyelectrolyte multilayers prevented organic fouling extensively. In addition, we found that AgCl/TiO 2 -incorporated membranes show higher water permeability and improved resistance to biological fouling as compared to the PES membrane. Silver amounts in consecutively collected permeate samples were quantified by ICP-MS analysis to assess the stability of AgCl/TiO 2 -incorporated layers. Silver loss per filtration cycle followed an increasing trend initially, up to a filtration volume totaling 3000 L/m 2 , leading to 4.2% reduction in the immobilized silver amount. After that, silver loss per filtration cycle stabilized at $ 7.44 μg/L, which extrapolates to $ 265 days time-span for the remaining silver to be released at a filtration rate of $ 1000 L/m 2 h. Antibacterial activity tests showed that AgCl/TiO 2 -incorporated layers do not permit bacterial growth on the membrane surface.

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Section: Lbl Layersmentioning

confidence: 99%

“…It was found that the surface charge had a significant influence on multivalent ion rejection and fouling resistance. In addition, Lajimi et al [8] showed decreased fouling for LbL-modified cellulose acetate (CA) membranes by sequential deposition of chitosan/alginate polyelectrolyte pairs.…”

Section: Introductionmentioning

confidence: 99%

Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO 2 xerogels

Kaner

Johnson

Şeker

et al. 2015

Journal of Membrane Science

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“…[42][43][44] The ultrathin membrane fabricated by LBL assembly possesses a dense network with multi-bipolar structures containing both cationic and anionic polyelectrolytes, which endows the membrane surface with high and changeable charge density to reject the salt ions.…”

Section: Membranesmentioning

confidence: 99%

Layer-by-layer (LBL) assembly technology as promising strategy for tailoring pressure-driven desalination membranes

Xu¹,

Wang²,

Zhao³

et al. 2015

Journal of Membrane Science

156

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“…Amine salt containing larger steric configuration cationic amine group resulted in better performance. Layer by layer surface modification has shown its ability to limit fouling and biofilm formation on asymmetric cellulose acetate membrane [22]. Surface treated membranes exhibit lower contact angles and lower average surface roughness than untreated membranes, suggesting these modified membranes could demonstrate improved fouling resistance [23].…”

Section: Introductionmentioning

confidence: 99%

Performance characteristics of surfactant treated commercial polyamide membrane in the nanofiltration of model solution of reactive yellow 160

Nath¹,

Patel²,

Dave³

2016

Journal of Water Process Engineering

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Effect of LbL surface modification on characteristics and performances of cellulose acetate nanofiltration membranes

Cited by 47 publications

References 31 publications

Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO 2 xerogels

Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO 2 xerogels

Layer-by-layer (LBL) assembly technology as promising strategy for tailoring pressure-driven desalination membranes

Performance characteristics of surfactant treated commercial polyamide membrane in the nanofiltration of model solution of reactive yellow 160

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