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
Forces between hydrophobic surfaces coated with ethyl(hydroxyethyl)cellulose in the presence of an ionic surfactant
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1991 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 7, 1441-1446 p.Article in journal (Refereed)
Abstract [en]

The forces between hydrophobic surfaces across an aqueous solution containing 0.25% ethyl(hydroxyethyl)cellulose (EHEC) and 4 mM SDS have been studied and compared with the situation in the absence of SDS. A long-range repulsive force (measurable at distances smaller than 1200 Å) is present already after an adsorption time of 30 minutes. The range of the repulsive force increases with time indicating that the adsorption process is rather slow. After 20 hours equilibration, the repulsion was measurable at separations smaller than 2500 Å. The force is rather insensitive to temperature and decays at large separations essentially exponentially, with a decay-length of approximately 300 Å. The force measured on compression is always slightly larger than the one observed on decompression. Hence, the forces are not measured in a true equilibrium situation. The system behaves strikingly different in the absence of SDS (Malmsten and Claesson, Langmuir, in press). Without any surfactant in the EHEC solution less long-range and completely reversible forces are observed. Hence, SDS causes the polymer conformation to be more extended, and is responsible for the non-equilibrium effects observed (e.g. by decreasing the polymer-surface affinity). The adsorbed amount in the presence of SDS was found to be about 1.7 mg/m2 at adsorption equilibrium, independent of temperature (20°-35°C). This is considerably less than in the absence of surfactants (5 mg/m2 at 20°C, 15 mg/m2 at 37°C).

Place, publisher, year, edition, pages
1991. Vol. 7, 1441-1446 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27293OAI: oai:DiVA.org:ri-27293DiVA: diva2:1054297
Note
A726Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

Open Access in DiVA

No full text

By organisation
YKI – Ytkemiska institutet
In the same journal
Langmuir
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

Total: 11 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
v. 2.26.0