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231223s2005 xx ||||| 00| ||eng c |
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|a (DE-627)NLM158701844
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|a (NLM)16262324
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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1 |
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|a Malaisamy, Ramamoorthy
|e verfasserin
|4 aut
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| 245 |
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|a High-flux nanofiltration membranes prepared by adsorption of multilayer polyelectrolyte membranes on polymeric supports
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 04.05.2007
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|a Date Revised 02.11.2005
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Layer-by-layer deposition of anionic and cationic polyelectrolytes readily converts polymeric ultrafiltration membranes into materials capable of nanofiltration. ATR-FTIR spectra confirm that layer-by-layer deposition occurs on the ultrafiltration substrates, and adsorption of as few as 2.5 bilayers of poly(styrenesulfonate) (PSS)/protonated poly(allylamine) (PAH) or 3.5 bilayers of PSS/poly(diallyldimethylammonium chloride) (PDADMAC) reduces the molecular weight cutoff of polyethersulfone ultrafiltration supports from 50 kDa to <500 Da. Deposition of multilayer polyelectrolyte films on 300 and 500 kDa membranes also decreases molecular weight cutoffs, but solute rejections are significantly lower when using these supports, suggesting that the polyelectrolyte films do not completely cover large (0.2-0.4 microm in diameter) pores. On the 50 kDa substrates, PSS/PDADMAC films containing 3.5 bilayers exhibit a 95% rejection of SO(4)(2-) and a chloride/sulfate selectivity of 27, whereas 4.5-bilayer PSS/PAH coatings show a glucose/raffinose selectivity of 100. Pure water flux for [PSS/PAH](3)PSS-coated membranes at 4.8 bar is 1.6 m(3)/(m(2)day), which is more than 2-fold higher than that through a commercial 500 Da membrane
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|a Journal Article
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|a Bruening, Merlin L
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 21(2005), 23 vom: 08. Nov., Seite 10587-92
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:21
|g year:2005
|g number:23
|g day:08
|g month:11
|g pages:10587-92
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|d 21
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|e 23
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|c 11
|h 10587-92
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