Modification of polyethersulfone membranes – A review of methods

Zhao, Changsheng; Xue, Jimin; Ran, Fen; Sun, Shudong

doi:10.1016/j.pmatsci.2012.07.002

Cited by 769 publications

(403 citation statements)

References 324 publications

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“…They are also used to form the porous support layer of many reverse osmosis, nanofiltration and some gas separation membranes. [11][12][13] Polysulfone is one of the most used polymers to prepare membranes due to its excellent characteristics such as high chemical, thermal and mechanical resistance. However, polysulfone membranes exhibit strong adsorption and deposition towards foulants on the membrane surface as well as inside membrane pores due to the hydrophobic nature of polysulfone.…”

Section: Introductionmentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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Polymer solutions of polysulfone (PSf) and methylcellulose (MC) in 1-methyl-2-pyrrolidone (NMP) were used to prepare ultrafiltration membranes by the phase inversion technique via immersion precipitation. The effect of MC additive on the structure and performances of the membranes was studied. The obtained membranes were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR-ATR), equilibrium water content (EWC), water contact angle, porosity and ultrafiltration experiments of polyethylene glycol solutions. It was found that all the PSf/MC membranes had higher porosity, more hydrophilic surface and more vertically finger like pores than PSf membrane. With an increase in MC content in the casting solution from 0.5% to 1.5%, the hydraulic permeability increases from 17.17 to 118.46 L.m -2 .h -1 .bar -1 , while the rejection decreases from 91.82% to 64.45% with PEG 35000. DSC scan and FTIR analysis confirmed that methylcellulose was trapped in the membranes matrix.

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Section: Introductionmentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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“…A number of strategies have been investigated in order to address the issue of membrane biofouling, generally the approach involves the design and testing of entirely new highly hydrophilic membrane polymers through blending, bulk or surface modification. 12 Interfacial polymerization or microemulsion coatings are some of the preferred methods for membrane modification. UV photografting, electron beam irradiation, plasma grafting and layer-by-layer methods have also been developed however, despite being effective for small scale development in labs their scale up has proved to be challenging.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Antifouling Properties of Carbohydrate Coated Poly(ether sulfone) Membranes

Angione

Duff

Bell

et al. 2015

ACS Appl. Mater. Interfaces

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Polyethersulfone membranes (PES) were modified with biologically active monosaccharides and disaccharides using aryldiazonium chemistry as a mild, one step, surface modification strategy. We previously proposed the modification of carbon, metals, and alloys with monosaccharides using the same method; herein we demonstrate modification of PES membranes and the effect of chemisorbed carbohydrate layers on their resistance to biofouling. Glycosylated PES surfaces were characterized using spectroscopic methods and tested against their ability to interact with specific carbohydratebinding proteins. Galactose, mannose and lactose modified PES surfaces were exposed to Bovine Serum Albumin (BSA) solutions to assess unspecific protein adsorption in the laboratory and were found to adsorb significantly lower amounts of BSA compared to bare membranes. The ability of molecular carbohydrate layers to impart antifouling properties was further tested in the field via long term immersive tests at a wastewater treatment plant. A combination of ATP content assays, infrared spectroscopic characterization and He-ion microscopy (HIM) imaging were used to investigate biomass accumulation at membranes. We show that, beyond laboratory applications and in the case of complex aqueous environments that are rich in biomass such as wastewater effluent, we observe significantly lower biofouling at carbohydrate modified PES than at bare PES membrane surfaces.

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“…The presence of additives in the polymer/solvent/non-solvent system (forming a quaternary or pseudoternary system) could be very important to control the membrane morphology and to improve some characteristics of the nascent membrane such as mechanical, thermal, magnetic, hydrophilic and even antifouling properties. The incorporation of additives in the casting solution (blending modification) or in the coagulation bath has been studied in a micro or nanoscale by many researchers [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2015

Journal of Membrane Science

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ElsevierGarcía Ivars, J.; Iborra Clar, MI.; Alcaina Miranda, MI.; Van Der Bruggen, B. (2015). Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes. ABSTRACTInorganic nanoparticles have been applied as additive in membrane synthesis for improving different properties from the base polymer such as hydrophilicity, fouling resistance or permselectivity. To investigate the changes caused by the presence of the inorganic nanoparticles in the formation of the membrane structure, two different metallic compounds with opposite hydrophilicity were used as additives: hydrophilic zinc oxide (ZnO) and hydrophobic tungsten disulphide (WS 2 ). For this purpose, the effect of these metal nanoparticles at ultra-low concentrations (0.05 and 0.25 wt% metal nanoparticles/polymer ratio) in the preparation of flat-sheet membranes based on polyethersulphone (PES) by immersion-precipitation method was investigated. Nmethyl-2-pyrrolidone (NMP) was used as solvent. The influence of both metal nanoparticles on the characteristics and permselective properties of PES membranes was studied with microscopic observations, contact angle measurements, and filtration experiments. Although the incorporation of metal nanoparticles could turn the system into thermodynamically unstable, the demixing process during formation of membranes was slightly delayed, suppressing the macrovoid formation (remarkably using WS 2 ).Regardless the nature of the metal nanoparticles, results showed an overall improvement in membrane hydrophilicity and permselectivity by adding metal nanoparticles compared to the control PES membrane, demonstrating that the behaviour of both metal nanoparticles at ultra-low concentrations was very similar.

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Modification of polyethersulfone membranes – A review of methods

Cited by 769 publications

References 324 publications

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Enhanced Antifouling Properties of Carbohydrate Coated Poly(ether sulfone) Membranes

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

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