Protection of polymeric membranes with antifouling surfacing via surface modifications

Jayalakshmi, A.; Nguyen, Thi Phuong Nga; Jun, Byung-Moon; Kim, In‐Chul; Kwon, Young‐Nam

doi:10.1016/j.colsurfa.2016.06.026

Cited by 137 publications

(67 citation statements)

References 131 publications

(131 reference statements)

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“…While previous studies have found good candidates for this class of materials, through targeted design of functional, self‐organizing polymers specifically for this application, better performance can be achieved. The most common approaches here are to either make use of constituents that will segregate to the membrane surface or to employ post‐processing treatments …”

Section: Introductionmentioning

confidence: 99%

Electrospun fiber membranes from blends of poly(vinylidene fluoride) with fouling‐resistant zwitterionic copolymers

Govinna

Kaner

Ceasar

et al. 2018

Polymer International

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Nonwoven super‐hydrophobic fiber membranes have potential applications in oil–water separation and membrane distillation, but fouling negatively impacts both applications. Membranes were prepared from blends comprising poly(vinylidene fluoride) (PVDF) and random zwitterionic copolymers of poly(methyl methacrylate) (PMMA) with sulfobetaine methacrylate (SBMA) or with sulfobetaine‐2‐vinylpyridine (SB2VP). PVDF imparts mechanical strength to the membrane, while the copolymers enhance fouling resistance. Blend composition was varied by controlling the PVDF‐to‐copolymer ratio. Nonwoven fiber membranes were obtained by electrospinning solutions of PVDF and the copolymers in a mixed solvent of N,N‐dimethylacetamide and acetone. The PVDF crystal phases and crystallinities of the blends were studied using wide‐angle X‐ray diffraction and differential scanning calorimetry (DSC). PVDF crystallized preferentially into its polar β‐phase, though its degree of crystallinity was reduced with increased addition of the random copolymers. Thermogravimetry (TG) showed that the degradation temperatures varied systematically with blend composition. PVDF blends with either copolymer showed significant increase of fouling resistance. Membranes prepared from blends containing 10% P(MMA‐ran‐SB2VP) had the highest fouling resistance, with a fivefold decrease in protein adsorption on the surface, compared to homopolymer PVDF. They also exhibited higher pure water flux, and better oil removal in oil–water separation experiments. © 2018 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Electrospun fiber membranes from blends of poly(vinylidene fluoride) with fouling‐resistant zwitterionic copolymers

Govinna

Kaner

Ceasar

et al. 2018

Polymer International

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“…Thus, ways to decrease hydrophobicity and to increase hydrophilicity of the PVDF‐based membranes is an important aspect. Such modification techniques mainly include surface coating, surface grafting, copolymerization modification, and blend modification . Compared with other methods, blend modification has more practical significance .…”

Section: Introductionmentioning

confidence: 99%

Effect of ethanol in the coagulation bath on the structure and performance of PVDF‐g‐PEGMA/PVDF membrane

Tang

Sun

et al. 2018

J of Applied Polymer Sci

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This report investigated the effect of ethanol content in the coagulation bath on the surface composition, membrane pore size structure, pure water flux, and permeability of the amphiphilic polymer polyvinylidene fluoride (PVDF)-g-poly (ethylene glycol) methyl ether methacrylate (PEGMA)-modified PVDF membrane. The study found that pore size and their distribution and, as a result, membrane permeability, can also be easily controlled by adjusting ethanol content in the coagulation bath. Membrane water fluxes formed by the coagulation baths with 0, 10, 20, and 30% of ethanol were 1843. 65, 2774.61, 4391.88, and 5142.35 L (m −2 Áh −1 ). When the content of ethanol in the coagulation bath is high, the surface enrichment of PEGMA slightly decreases, and the surface becomes rougher. Thus, the decrease of the hydrophilic functional groups on the surface of the membrane and the increase of the roughness leads to the deterioration of the hydrophilicity of the membranes surface.

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“…6 The membrane process that uses pressure as a driving force such as microfiltration (MF), ultrafiltration (UF), and nanofiltration (NF) have been widely used because of strong demand for a large number of industrial applications such as purification, seawater desalination, wastewater treatment and reuse, food processing and bioseparation. 5,[7][8][9][10] In addition, NF technology is reported to be efficient in the separation of organic micro-pollutants, while the main disadvantage of this technology is its high energy consumption due to the high operational pressures. 6,[11][12][13][14][15] On the other hand, the separation performance by MF and UF is limited by large pore size despite relatively lower operational pressure.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] The conventional operation of the membrane-based technology is superior to other methods such as adsorption and distillation. 6 The membrane process that uses pressure as a driving force such as microfiltration (MF), ultrafiltration (UF), and nanofiltration (NF) have been widely used because of strong demand for a large number of industrial applications such as purification, seawater desalination, wastewater treatment and reuse, food processing and bioseparation.…”

Section: Introductionmentioning

confidence: 99%

"SYNERGISTIC ABILITY OF PSf AND PVDF TO DEVELOP HIGH-PERFORMANCE PSf/PVDF COATED MEMBRANE FOR WATER TREATMENT"

2018

RJC

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In this study, asymmetric polysulfone (PSf)/polyvinylidene fluoride (PVDF) coated membranes were prepared from PSf/NMP/NH4Cl and PVDF/NMP/NH4Cl system via phase inversion induced by immersion precipitation. Effect of stirring time and cast thickness on morphology, mechanical strength, and pure water permeability of the prepared membranes were systematically studied by scanning electron microscopy (SEM), tensile tester and dead-end filtration experiments. The results demonstrated that the elevation in the stirring time resulted in higher porosity and greater formation of smaller pore sizes, which attributed to higher Young's modulus and comparable pure water permeability. The casting with different thicknesses was done in this study. It was shown that pores on the membrane surface become larger in size with an increase of cast thicknesses. At the same time, the porosity of the membranes was gradually reduced. When the 7 hours stirring time and 0.4 mm cast thickness was used in preparation, the membranes exhibited the excellent pure water permeability. In general, PSfPVDF coated membranes have an increased thermal resistance as the stirring time and casting thickness increases. In addition, chemical resistance analysis results showed higher acid resistance and lower alkaline resistance of the prepared membranes. On the whole, adjusting stirring time and cast thicknesses is an effective approach to tailor the mechanical strength, performance, thermal and also chemical resistance of the formed PSf/PVDF coated membranes.

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Protection of polymeric membranes with antifouling surfacing via surface modifications

Cited by 137 publications

References 131 publications

Electrospun fiber membranes from blends of poly(vinylidene fluoride) with fouling‐resistant zwitterionic copolymers

Electrospun fiber membranes from blends of poly(vinylidene fluoride) with fouling‐resistant zwitterionic copolymers

Effect of ethanol in the coagulation bath on the structure and performance of PVDF‐g‐PEGMA/PVDF membrane

"SYNERGISTIC ABILITY OF PSf AND PVDF TO DEVELOP HIGH-PERFORMANCE PSf/PVDF COATED MEMBRANE FOR WATER TREATMENT"

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