Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Mixed Adsorption of Fluorinated and Hydrogenated Surfactants
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.ORCID iD: 0000-0002-0231-3970
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.
2006 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 22, no 19, 7969-7974 p.Article in journal (Refereed) Published
Abstract [en]

The adsorption isotherms of sodium perfluorooctanoate and sodium decyl sulfate and their 1:1 mixture on gamma-alumina are recorded by depletion-type experiments with H-1 and F-19 NMR spectroscopy as the detection tool. The isotherms of the different surfactant species, obtained with and without added salt, closely resemble each other. Salt addition changes the isotherms from stepwise to the familiar S-shaped. After having reached saturation, a further increase of surfactant concentration in the mixed system leads to decyl sulfate desorption and increased perfluorooctanoate adsorption. The F-19 chemical shift of adsorbed perfluorooctanoate suggests that, for saturated surfaces, the two sorts of adsorbed surfactants form molecularly mixed surface aggregates.

Place, publisher, year, edition, pages
2006. Vol. 22, no 19, 7969-7974 p.
Keyword [en]
mineral oxide surfaces, self-assembled monolayers, ferric hydro sols, fluorocarbon surfactants, aqueous-solutions, anionic surfactants, binary-mixtures, magnetic-resonance, nmr-spectroscopy, sodium perfluorooctanoate
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-5688DOI: 10.1021/la060757pISI: 000240250600007Scopus ID: 2-s2.0-33748786774OAI: oai:DiVA.org:kth-5688DiVA: diva2:10135
Note
QC 20100914Available from: 2006-05-10 Created: 2006-05-10 Last updated: 2012-01-13Bibliographically approved
In thesis
1. Molecular Association Studied by NMR Spectroscopy
Open this publication in new window or tab >>Molecular Association Studied by NMR Spectroscopy
2006 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

This Thesis presents studies of molecular association in aqueous solution and at the liquid/solid interface. The investigated molecular systems range from self-aggregating surfactants to hydration water in contact with micelles or individual molecules. In most studies, combinations of various NMR methods were applied. These vary from simple chemical shift and intensity measurements to more elaborate self-diffusion and intermolecular cross-relaxation experiments.

Non-ideal mixed micelles of fluorinated and hydrogenated surfactants were studied by an experimental procedure that allows an analysis in terms of micellar structure, using a minimal number of initial assumptions. Quantitative conclusions about micro-phase separation within mixed micelles were obtained within the framework of the regular solution theory. Additionally, NMR was introduced and developed as a powerful method for studying adsorption of surfactants at solid interfaces. Adsorption isotherms for pure and mixed surfactant systems and non-ideal mixing behavior of fluorinated and hydrogenated surfactants at solid surfaces were quantified. Fluorosurfactant-protein association was investigated using the methods described.

Intermolecular cross-relaxation rates between solute and solvent molecules were recorded at several different magnetic fields. The results reveal strong frequency dependence for both small molecules and micelles. This finding demonstrates that intermolecular cross-relaxation is not solely controlled by fast local motions, but also by long-range translational dynamics. Data analysis in terms of recently developed relaxation models provides information about the hydrophobic hydration and micellar structure.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. 52 p.
Series
Trita-FYK, 0602
Keyword
NMR, spin relaxation, self-diffusion, intermolecular cross-relaxation, chemical shift, fluorinated surfactants, hydrogenated surfactant, micelle, non-ideal mixing, adsorption, hydration, surfactant-protein association
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-3947 (URN)91-7178-345 8 (ISBN)
Public defence
2006-05-19, F3, Lindstedtsv. 26, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20100914Available from: 2006-05-10 Created: 2006-05-10 Last updated: 2010-09-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Authority records BETA

Furo, Istvan

Search in DiVA

By author/editor
Nordstierna, LarsFuro, IstvanStilbs, Peter
By organisation
Physical Chemistry
In the same journal
Langmuir
Physical Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 73 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf