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
Equilibrium wetting studies of cationic surfactant adsorption on mica 1. Mono- and bilayer adsorption of CTAB
YKI – Ytkemiska institutet.
1996 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 181, p. 476-489Article in journal (Refereed)
Abstract [en]

The Wilhelmy plate method was used to study the wetting bahvior of CTAB solution on mica at concentrations from 10Ä-7Å M to 3*10Ä-4Å M. A freshly cleaved mica plate shows large amplitude oscillations of the dynamic advancing wetting tension and a jump-stick behavior of the meniscus due to surfactant adsorption at the three-phase contact line. Desorption in pure water is slow. During relaxation measurements, the wetting tension reaches its equilibrium value on a timescale of several hours. The equilibrium wetting tension decreases at low concentrations, reaches a minimum at 2.4*10Ä-5Å M corresponding to a contact angle of 73ÄoÅ, and then increases (solid/liquid bilayer adsorption) up to 3*10Ä-4Å M. The solid/liquid and solid/vapor adsorption isotherms were deduced from application of the Gibbs adsorption equation, surface force, and XPS data. The solid/liquid bilayer contains 1.4-1.6 surfactant cations per mica charge site, 0.7-1.0 in the inner layer and 0.6-0.75 in the outer layer. The areas per surfactant cation are 0.48-0.68 nmÄ2Å and 0.64-0.80 nmÄ2Å.

Place, publisher, year, edition, pages
1996. Vol. 181, p. 476-489
Keywords [en]
Equilibrium contact angle, Gibbs adsorption equation, hexadecyltrimethylammonium bromide(CTAB), mica, stick-jump spreading, surfactant adsorption, Wilhelmy plate method
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26742OAI: oai:DiVA.org:ri-26742DiVA, id: diva2:1053745
Note
A1004Available from: 2016-12-08 Created: 2016-12-08 Last updated: 2017-11-29Bibliographically approved

Open Access in DiVA

No full text in DiVA

By organisation
YKI – Ytkemiska institutet
In the same journal
Journal of Colloid and Interface Science
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 22 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. 2.35.3