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Interfacial properties of bottle-brush polyelectrolytes and lipids
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface Chemistry.
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
2010.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2010:21
Identifiers
URN: urn:nbn:se:kth:diva-12953ISBN: 978-91-7415-658-4 (print)OAI: oai:DiVA.org:kth-12953DiVA: diva2:319831
Presentation
2010-06-04, 10:00 (English)
Opponent
Supervisors
Note
QC 20100520Available from: 2010-05-20 Created: 2010-05-20 Last updated: 2012-03-19Bibliographically approved
List of papers
1. Adsorption characteristics of brush polyelectrolytes on silicon oxynitride revealed by dual polarisation interferometry
Open this publication in new window or tab >>Adsorption characteristics of brush polyelectrolytes on silicon oxynitride revealed by dual polarisation interferometry
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2010 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 348, 189-197 p.Article in journal (Refereed) Published
Abstract [en]

Adsorption properties of bottle-brush polyelectrolytes have been investigated using dual polarization interferometry (DPI), which provides real time monitoring of adsorbed layer thickness and refractive index. The adsorption on silicon oxynitride was carried out from aqueous solution with no added inorganic salt, and the adsorbed polyelectrolyte layer was subsequently rinsed with NaCl solutions of increasing concentration. The bottle-brush polyelectrolytes investigated in this study have different ratios of permanent cationic charged segments and uncharged PEO side chains. Both the cationic groups and the PEO side chains have affinity for silica-like surfaces, and thus contribute to the adsorption process that becomes rather complex. Adsorption properties in water, responses to changes in ionic strength of the surrounding medium, adsorption kinetics and the layer structure are all strongly dependent on the ratio between backbone charges and side chains. The results are interpreted in terms of competitive adsorption of segments with different chemical nature. The adsorption kinetics is relatively fast, taking only tens to hundreds of seconds when adsorbed from dilute 100 ppm solutions. The DPI technique was found to be suitable for studying such rapid adsorption processes, including determination of the initial adsorption kinetics. We expect that the effects observed in this study are of general importance for synthetic and biological polymers carrying segments of different nature.

Keyword
Bottle-brush polyelectrolyte, Dual polarization interferometry, Adsorption, Desorption, Adsorption mechanism, Adsorption kinetics, Silicon oxynitride
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-12951 (URN)10.1016/j.jcis.2010.03.067 (DOI)000278924600024 ()20403606 (PubMedID)2-s2.0-77953620714 (Scopus ID)
Note
QC 20100520Available from: 2010-05-20 Created: 2010-05-20 Last updated: 2011-05-16Bibliographically approved
2. Physicochemical properties of 1-palmitoyl-2-oleoyl-sn- glycero-3-phosphocholine (POPC) monolayers - influence of charge addition and temperature
Open this publication in new window or tab >>Physicochemical properties of 1-palmitoyl-2-oleoyl-sn- glycero-3-phosphocholine (POPC) monolayers - influence of charge addition and temperature
(English)Manuscript (preprint) (Other (popular science, discussion, etc.))
Identifiers
urn:nbn:se:kth:diva-12952 (URN)
Note
QC 20100520Available from: 2010-05-20 Created: 2010-05-20 Last updated: 2010-09-13Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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