| Clouding: origin of phase separation in oppositely charged polyelectrolyte/surfactant mixed solutions. | |
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MedLine Citation:
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PMID: 16471766 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The phase behavior in the system of cationic modified poly(vinyl alcohol) (CPVA)-sodium dodecylsulfate (SDS)-water has been investigated. Samples were found phase separated near electroneutral mixing at CPVA concentrations < or =6%, while in a medium CPVA concentration of 7-12%, the phase separation disappeared and the system transformed into bluish homogeneous solution. At > or =13% CPVA concentrations, the mixed systems became colorless homogeneous. Preclouding phenomenon was observed in 5-8% CPVA-SDS mixed systems at an electroneutral mixing ratio. The addition of inorganic salts, such as Na2SO4, NaCl, NaBr, and NaSCN, could exclude the bluish and phase separation phenomenon that was found to be caused by the increase of clouding point in these systems. The clouding phenomenon was proven to be the origin of the phase separation in the CPVA-SDS mixed system. The ability for the inorganic salts to increase the clouding point follows the order of the Hofmeister series. |
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Authors:
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Yun Yan; Li Li; Heinz Hoffmann |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The journal of physical chemistry. B Volume: 110 ISSN: 1520-6106 ISO Abbreviation: J Phys Chem B Publication Date: 2006 Feb |
Date Detail:
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Created Date: 2006-02-13 Completed Date: 2006-09-28 Revised Date: 2007-03-23 |
Medline Journal Info:
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Nlm Unique ID: 101157530 Medline TA: J Phys Chem B Country: United States |
Other Details:
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Languages: eng Pagination: 1949-54 Citation Subset: - |
Affiliation:
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Bayreuther Zentrum für Kolloid und Grenzflächen, Universität Bayreuth, Gottlieb-keim Strasse 60, 95448, Germany. yun.yan@wur.nl |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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