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231223s2007 xx ||||| 00| ||eng c |
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|a (NLM)17419654
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|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Postmus, Bart R
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Competitive adsorption of nonionic surfactant and nonionic polymer on silica
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| 264 |
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|c 2007
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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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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| 500 |
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|a Date Completed 27.06.2007
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|a Date Revised 01.05.2007
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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| 520 |
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|a Competitive adsorption of the nonionic polymer poly(ethylene oxide) (PEO) and the nonionic surfactant of the type poly(ethylene oxide) alkyl ether from aqueous solutions on a silica surface is examined. From one-component solutions, both species readily adsorb onto silica and, in the bulk of mixed (two-component) solutions, polymer-surfactant complexes are not observed. Because both species bind by the same mechanism to silica, subtle differences in layer structure, or other species-specific parameters, determine whether one or both of the species will adsorb. It was found that various surfactants can displace PEO up to a certain critical molecular weight. Surfactants with a high aggregation number, in bulk and on the surface, can displace PEO with a higher molar mass than surfactants with a low aggregation number. As the molar mass of the polymer increases, the time a surfactant needs to completely displace the polymer increases. We can explain both the existence of the critical molar mass and the decrease in adsorption kinetics with a shift in the critical surface association concentration (CSAC)
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|a Journal Article
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1 |
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|a Leermakers, Frans A M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Koopal, Luuk K
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Stuart, Martien A Cohen
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 23(2007), 10 vom: 08. Mai, Seite 5532-40
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:23
|g year:2007
|g number:10
|g day:08
|g month:05
|g pages:5532-40
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|a AR
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| 952 |
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|d 23
|j 2007
|e 10
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|h 5532-40
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