Chlorine resistant polysulfone reverse osmosis modules

Allegrezza, Anthony E.; Parekh, B. S.; Parise, P. L.; Swiniarski, E.J.; White, James L.

doi:10.1016/0011-9164(87)90103-2

Cited by 48 publications

(24 citation statements)

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“…The mechanism of sulfonated polysulfone thermal curing is not fully understood but intramolecular crosslinking via the sulfonate moiety has been proposed. Such sulfonated polysulfone‐based TFC membranes have shown some promising results including excellent chlorine resistance, high flux, and good antifouling behavior 179, 199–202. However, salt rejection of these membranes is significantly reduced when the feed water has high salinity or contains moderate concentration of divalent cations such as calcium 199…”

Section: Reverse Osmosis Membranesmentioning

confidence: 99%

“…Although sulfonatation of polysulfone is easily achieved with chlorosulfonic acid, the harsh reaction conditions cause undesirable degradation and side reactions such as chain scission, branching, and crosslinking 179, 199, 200, 203. To address these issues, Noshay and Robeson introduced an alternative sulfonation method by using a complex of sulfur trioxide and triethyl phosphate as a sulfonating reagent at room temperature 180.…”

Section: Reverse Osmosis Membranesmentioning

confidence: 99%

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Water purification by membranes: The role of polymer science

Geise

Lee

Miller

et al. 2010

J Polym Sci B Polym Phys

880

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%

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

880

694

View full text Add to dashboard Cite

show abstract

“…Sulfonated polysulfone (SPSF), mainly prepared by the post-sulfonation method, has been used for chlorine-tolerant RO membranes [29,30]. However, it was withdrawn from the market due to limited solubility in common solvents and difficultly in controlling the degree of sulfonation.…”

Section: Introductionmentioning

confidence: 99%

Polyamide thin-film composite membranes based on carboxylated polysulfone microporous support membranes for forward osmosis

Cho

Han

et al. 2013

Journal of Membrane Science

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/j.memsci.2013.06.003 Science, 445, pp. 220-227, 2013-06-13 Polyamide thin-film composite membranes based on carboxylated polysulfone microporous support membranes for forward osmosis Cho, Young Hoon; Han, Jungim; Han, Sungsoo; Guiver, Michael D.; Park, Ho Bum Journal of Membrane AbstractDue to its simple process and low energy consumption, forward osmosis (FO) has gained significant attention in the fields of emergency drinks, desalination, landfill leachate treatment, and brine concentration. However, current state-of-the-art reverse osmosis (RO) membranes show relatively low water fluxes in FO processes due to high internal concentration polarization (ICP) and high mass transfer resistance in commercially available microporous support membranes. In this study, carboxylated polysulfones (CPSFs) were synthesized via direct polysulfone (PSF) functionalization and considered as moderately hydrophilic, mechanically stable microporous support membranes. The incorporation of hydrophilic groups into hydrophobic polymer backbones often reduces mechanical strength due to excessive water swelling. However, the mechanical properties of CPSFs (degree of substitution, DS=0.45~0.85) were similar to those of pristine PSF, and they retained their hydrophilic nature. Microporous CPSF membranes were prepared in various conditions, and FO water fluxes and salt passages of polyamide thin-film/CPSF composite membranes were measured and compared with each other. CPSF-based FO membranes showed significantly higher water fluxes than PSF-based FO membranes at the same membrane formation conditions, which might be due to enhanced hydrophilicity and reduced ICP.

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“…Commercial poly(arylene ether sulfone)s are widely used as the porous substructure in composite desalination membranes. They have been of interest for water purification for some time, at least in part, because they do not doi: 10.2166/wst.2010.883 have the amide linkages believed to be the starting point for chlorine degradation of conventional PA membranes (Noshay & Robeson 1976;Brousse et al 1976;Allegrezza et al 1987). However, due to their aromatic structure, poly(arylene ether sulfone) membranes are highly hydrophobic, which limits their use as separation film layers for desalination.…”

Section: Introductionmentioning

confidence: 99%

Advances in membrane materials: desalination membranes based on directly copolymerized disulfonated poly(arylene ether sulfone) random copolymers

Xie¹,

Park

Cook³

et al. 2010

Water Science and Technology

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The water and salt transport properties of chlorine tolerant disulfonated poly(arylene ether sulfone) (BPS) copolymers have been characterized. Cast BPS membranes of both salt form and acid form with sulfonation levels from 20% to 40% were investigated. Water permeability of BPS films increases more than one order of magnitude as sulfonation level increases from 20% to 40%, while the salt permeability of the corresponding membranes increases two orders of magnitude. Moderate salt rejection (98.2%) was achieved by a BPS salt form membrane with a sulfonation level of 20%.

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Chlorine resistant polysulfone reverse osmosis modules

Cited by 48 publications

References 1 publication

Water purification by membranes: The role of polymer science

Water purification by membranes: The role of polymer science

Polyamide thin-film composite membranes based on carboxylated polysulfone microporous support membranes for forward osmosis

Advances in membrane materials: desalination membranes based on directly copolymerized disulfonated poly(arylene ether sulfone) random copolymers

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