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231223s2004 xx ||||| 00| ||eng c |
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|a (NLM)15595782
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Miller, Matthew D
|e verfasserin
|4 aut
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| 245 |
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|a Controlling the nanofiltration properties of multilayer polyelectrolyte membranes through variation of film composition
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|c 2004
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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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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 03.02.2006
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|a Date Revised 19.11.2015
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|a published: Print
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|a Citation Status MEDLINE
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|a We report the use of a variety of polyelectrolyte multilayers (PEMs) as selective skins in composite membranes for nanofiltration (NF) and diffusion dialysis. Deposition of PEMs occurs through simple alternating adsorption of polycations and polyanions, and separations can be optimized by varying the constituent polyelectrolytes as well as deposition conditions. In general, the use of polycations and polyanions with lower charge densities allows separation of larger analytes. Depending on the polyelectrolytes employed, PEM membranes can remove salt from sugar solutions, separate proteins, or allow size-selective passage of specific sugars. Additionally, because of the minimal thickness of PEMs, NF pure water fluxes through these membranes typically range from 1.5 to 3 m3/(m2 day) at 4.8 bar. Specifically, to separate sugars, we employed poly(styrene sulfonate) (PSS)/poly(diallyldimethylammonium chloride) (PDADMAC) films, which allow 42% passage of glucose along with a 98% rejection of raffinose and a pure water flux of 2.4 m3/(m2 day). PSS/PDADMAC membranes are also capable of separating NaCl and sucrose (selectivity of approximately 10), while high-flux chitosan/hyaluronic acid membranes [pure water flux of 5 m3/(m2 day) at 4.8 bar] may prove useful in protein separations
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Carbohydrates
|2 NLM
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|a Electrolytes
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|a Polyethylenes
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|a Quaternary Ammonium Compounds
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|a Water
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|a 059QF0KO0R
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|a poly-N,N-dimethyl-N,N-diallylammonium chloride
|2 NLM
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|a 26062-79-3
|2 NLM
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|a Sodium Chloride
|2 NLM
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|a 451W47IQ8X
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|a Hyaluronic Acid
|2 NLM
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|a 9004-61-9
|2 NLM
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|a Chitosan
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|a 9012-76-4
|2 NLM
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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 20(2004), 26 vom: 21. Dez., Seite 11545-51
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:20
|g year:2004
|g number:26
|g day:21
|g month:12
|g pages:11545-51
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|d 20
|j 2004
|e 26
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|h 11545-51
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