Surface modification of polyacrylonitrile ultrafiltration membranes using amphiphilic Pluronic F127/CaCO3 nanoparticles for oil/water emulsion separation

Melbiah, J.S. Beril; Nithya, D.; Mohan, D.

doi:10.1016/j.colsurfa.2016.12.008

Cited by 72 publications

(22 citation statements)

References 64 publications

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“…Figure shows the normalized water permeabilities of each layer, L pi / L pw . The permeability reduction of the SPSf2 membrane (Region I) might be due to the reorganization or mobility of surface functional groups, and/or removal of the trace amounts of solvents previously retained within the pores . After PEI deposition (Region II), 21% of initial permeability was lost.…”

Section: Resultsmentioning

confidence: 99%

Layer‐by‐layer self‐assembly of multifunctional enzymatic UF membranes

Yürekli

2019

J of Applied Polymer Sci

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In order to eliminate membrane fouling and to ensure enzymatic hydrolysis of urea, multifunctional biocatalytic membranes were prepared by using urease (URE) and trypsin (TRY) enzymes on the sulfonated polysulfone (SPSf) ultrafiltration membrane via layer‐by‐layer (LbL) self‐assembly method. The membrane architecture consisted of multilayer assembly with TRY and URE enzymes as the outer layer and inner sandwiched layer, respectively. Polyethyleneimine (PEI) and alginate (ALG) were used as cationic and anionic polyelectrolytes. Sulfonation and PEI deposition were successfully accomplished as confirmed by attenuated total reflectance Fourier transform infrared spectroscopy, differential scanning calorimetry (DSC) and scanning electron microscopy analysis, contact angle measurements, staining with toluidine blue and Congo red dyes and dead‐end filtration experiments. A characteristic value of SPSf membrane with a high water permeability (1000 L/m2.h.bar) and 95% bovine serum albumin (BSA) rejection was observed. In static conditions, URE activities of SPSf2‐PEI‐URE membrane were not affected by BSA fouling, while TRY immobilizations with increased concentrations (SPSf2‐PEI‐URE‐PEI‐ALG‐TRY) significantly lowered the activity of URE. In dynamic conditions, each deposited layer exhibited individual resistance to flow that can be considered as irreversible fouling and caused 90% of flux decline for the SPSf2‐PEI‐URE‐PEI‐ALG‐TRY membrane assembly. The recovery of the initial flux for the multilayered membrane at the end of six fouling and washing cycles was observed 85%. Moreover, at the end of 5 cycles, 78% of the URE initial activity of the multilayered membrane was preserved. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48750.

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Section: Resultsmentioning

confidence: 99%

Layer‐by‐layer self‐assembly of multifunctional enzymatic UF membranes

Yürekli

2019

J of Applied Polymer Sci

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“…[19,31,102,115,117,119,120] For example, Gao et al reported a polyionized hydrogel coated copper mesh (underwater oil contact angle ~ 165 o ), which exhibited ultralow adhesion to viscous crude oils under an aqueous environment and could effectively separate a crude oil/water mixture with high flux and high oil rejection. [100] Blending and fabricating nanocomposite membranes. Surface modification only imparts a thin hydrophilic layer on the membrane surface (also on the walls of the pores).…”

Section: General Method: Improving Surface Hydrophilicitymentioning

confidence: 99%

Antifouling membranes for oily wastewater treatment: Interplay between wetting and membrane fouling

Huang

Ras

Tian

2018

Current Opinion in Colloid & Interface Science

286

113

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Oily wastewater is an extensive source of pollution to soil and water, and its harmless treatment is of great importance for the protection of our aquatic ecosystems. Membrane filtration is highly desirable for removing oil from oily water because it has the advantages of energy efficiency, easy processing and low maintenance cost. However, membrane fouling during filtration leads to severe flux decline and impedes long-term operation of membranes in practical wastewater treatment. Membrane fouling includes reversible fouling and irreversible fouling. The fouling mechanisms have been explored based on classical fouling models, and on oil droplet behaviors (such as droplet deposition, accumulation, coalescence and wetting) on the membranes. Membrane fouling is dominated by droplet-membrane interaction, which is influenced by the properties of the membrane (e.g., surface chemistry, structure and charge) and the wastewater (e.g., compositions and concentrations) as well as the operation conditions. Typical membrane antifouling strategies, such as surface hydrophilization, zwitterionic polymer coating, photocatalytic decomposition and electrically enhanced antifouling are reviewed, and their cons and pros for practical applications are discussed.

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“…In this context, in pure PAN membrane (M A ), the hydrophobic interaction drives the oil molecules to deposit directly over the hydrophobic surface that leads to a sharp flux decline over time. In contrast, in the case of PF127 added membranes the presence of hydrophilic PEO moieties makes a hydrophilic surface in aqueous media which helps to reduce the hydrophobic interactions and adhesion of the oil droplets on the membrane surface …”

Section: Resultsmentioning

confidence: 99%

Customized antifouling polyacrylonitrile ultrafiltration membranes for effective removal of organic contaminants from aqueous stream

Melbiah

Joseph

Rana

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Ultrafiltration (UF) is a promising separation technique for the removal of macromolecular contaminants. However, the hydrophobic polymeric UF membrane performance suffers from fouling in the long run due to clogging by contaminants at the surface and pores. In this study, anti-fouling hydrophilic polyacrylonitrile (PAN) UF membranes in the presence of an amphiphilic triblockcopolymer, Pluronic F127 (PF127) were prepared via a phase inversion technique. RESULTS: The effect of varying concentrations of PF127 on PAN UF membranes was analyzed by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The filtration characteristics of the membranes were measured in terms of pure water flux, membrane porosity and water content. The separation efficiency of the membranes is explored for contaminants such as bovine serum albumin (BSA), humic acid (HA) and oil. The results revealed that the PAN membrane with 4 wt% of PF127 produced greatest permeate flux of 391 L m −2 h −1 with minimal fouling. A higher solute rejection of more than 90% was observed for the tailored membranes due to the improvement in surface properties. CONCLUSION:The inherent hydrophilicity of the high density poly (ethylene oxide) brush-like layer of PF127 at the membrane-water interface is utilized effectively to restrict the adsorption of the organic contaminants onto the membrane surface. After simple hydraulic washing of PAN/PF127 UF membranes, the flux recovery ratio was augmented which is ascribed to their excellent antifouling property and potential use in water treatment. Reversible flux decline, DRrTotal flux decline,J Chem Technol Biotechnol 2019; 94: 859-868 Pure water permeationPure water flux is considered to be the key factor for any UF membrane. The pure water flux profile obtained for the various J Chem Technol Biotechnol 2019; 94: 859-868

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Surface modification of polyacrylonitrile ultrafiltration membranes using amphiphilic Pluronic F127/CaCO3 nanoparticles for oil/water emulsion separation

Cited by 72 publications

References 64 publications

Layer‐by‐layer self‐assembly of multifunctional enzymatic UF membranes

Layer‐by‐layer self‐assembly of multifunctional enzymatic UF membranes

Antifouling membranes for oily wastewater treatment: Interplay between wetting and membrane fouling

Customized antifouling polyacrylonitrile ultrafiltration membranes for effective removal of organic contaminants from aqueous stream

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