Development of fabric reinforced polysulfone membranes

Rangarajan, R.; Desai, N. B.; Mody, Rustom; Mohan, Dinesh; Rao, A. V.

doi:10.1016/0011-9164(91)85148-n

Cited by 12 publications

(6 citation statements)

References 1 publication

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“…11 and 12). An anisotropic microporous structure of the layer can be produced by a single step phase‐inversion method 155. The microporous polysulfone material by itself can also be used for nanofiltration applications.…”

Section: Reverse Osmosis Membranesmentioning

confidence: 99%

Water purification by membranes: The role of polymer science

Geise

Lee

Miller

et al. 2010

J Polym Sci B Polym Phys

868

694

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Two of the greatest challenges facing the 21st century involve providing sustainable supplies of clean water and energy, two highly interrelated resources, at affordable costs. Membrane technology is expected to continue to dominate the water purification technologies owing to its energy efficiency. However, there is a need for improved membranes that have higher flux, are more selective, are less prone to various types of fouling, and are more resistant to the chemical environment, especially chlorine, of these processes. This article summarizes the nature of the global water problem and reviews the state of the art of membrane technology. Existing deficiencies of current membranes and the opportunities to resolve them with innovative polymer chemistry and physics are identified. Extensive background is provided to help the reader understand the fundamental issues involved. Ph.D. students and two postdoctoral fellows performing fundamental research in gas and liquid separations using polymer membranes and barrier packaging. His research group focuses on include structure/property correlation development for desalination and vapor separation membrane materials, new materials for hydrogen separation and natural gas purification, nanocomposite membranes, reactive barrier packaging materials, and new materials for improving fouling resistance and permeation performance in liquid separation membranes. His research is described in more than 250 publications, and he has coedited four books on these topics. He has won a number of national awards for his research contributions, including the ACS

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Section: Reverse Osmosis Membranesmentioning

confidence: 99%

Water purification by membranes: The role of polymer science

Geise

Lee

Miller

et al. 2010

J Polym Sci B Polym Phys

868

694

View full text Add to dashboard Cite

show abstract

“…It has been widely accepted that the polyamide thin film determines the permeability and the selectivity of the final composite RO membrane and most research on the polyamide skin layer were devoted to improving permeability, selectivity, and fouling-resistance of the membrane by surface modification and/or nanoparticles incorporation [9,10,11,12,13,14,15,16,17]. Actually, the physical morphology and chemical properties of the porous support deeply influenced the formation of the polyamide thin film [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Modification of PSf/SPSf Blended Porous Support for Improving the Reverse Osmosis Performance of Aromatic Polyamide Thin Film Composite Membranes

Liu

Xie

et al. 2018

Polymers

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Abstract:In this study, modification of polysulfone (PSf)/sulfonated polysulfone (SPSf) blended porous ultrafiltration (UF) support membranes was proposed to improve the reverse osmosis (RO) performance of aromatic polyamide thin film composite (TFC) membranes. The synergistic effects of solvent, polymer concentration, and SPSf doping content in the casting solution were investigated systematically on the properties of both porous supports and RO membranes. SEM and AFM were combined to characterize the physical properties of the membranes, including surface pore natures (porosity, mean pore radius), surface morphology, and section structure. A contact angle meter was used to analyze the membrane surface hydrophilicity. Permeate experiments were carried out to evaluate the separation performances of the membranes. The results showed that the PSf/SPSf blended porous support modified with 6 wt % SPSf in the presence of DMF and 14 wt % PSf had higher porosity, bigger pore diameter, and a rougher and more hydrophilic surface, which was more beneficial for fabrication of a polyamide TFC membrane with favorable reverse osmosis performance. This modified PSf/SPSf support endowed the RO membrane with a more hydrophilic surface, higher water flux (about 1.2 times), as well as a slight increase in salt rejection than the nascent PSf support. In a word, this work provides a new facile method to improve the separation performance of polyamide TFC RO membranes via the modification of conventional PSf porous support with SPSf.

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“…The TFC polyamide membranes, which are used in RO process consists of three sections: a top layer (polyamide); a middle layer (polyethersulfone or polysulfone porous layer); and a bottom layer (a non‐woven fabric support sheet). The top surface, which is usually formed by interfacial polymerization of a diamine such as m ‐phenylenediamine (MPD) with a triacyl such as trimesoyl chloride (TMC) on the UF support provides the controlling properties as to semipermeability; and is responsible for the high rejection …”

Section: Introductionmentioning

confidence: 99%

Effect of surface properties of polysulfone support on the performance of thin film composite polyamide reverse osmosis membranes

Yakavalangi

Rimaz

Vatanpour

2016

J of Applied Polymer Sci

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In this work, influence of initial conditions and surface characteristics of porous support layer on structure and performance of a thin film composite (TFC) polyamide reverse osmosis (RO) membrane was investigated. The phase inversion method was used for casting of polysulfone (PSf) supports and interfacial polymerization was used for coating of polyamide layer over the substrates. The effect of PSf concentrations that varied between 16 wt % and 21 wt %, and kind of the solvent (DMF and NMP) used for preparation of initial casting solution were investigated on the properties of the final RO membranes. SEM imaging, surface porosity, mean pore radius, and pure water flux analysis were applied for characterization of the supports. The substrate of the membrane, which synthesized with 18 wt % of PSf showed the most porosity and the synthesized RO membrane had the lowest salt rejection. In case of the solvents, the membranes synthesized with DMF presented better separation performance that can be attributed to their lower thickness and sponge-like structure. The best composition of support for TFC RO membranes reached 16 wt % PSf in DMF solvent.

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Development of fabric reinforced polysulfone membranes

Cited by 12 publications

References 1 publication

Water purification by membranes: The role of polymer science

Water purification by membranes: The role of polymer science

Modification of PSf/SPSf Blended Porous Support for Improving the Reverse Osmosis Performance of Aromatic Polyamide Thin Film Composite Membranes

Effect of surface properties of polysulfone support on the performance of thin film composite polyamide reverse osmosis membranes

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