Forces between silica surfaces with adsorbed cationic surfactants: Influence of salt and added nonionic surfactants
(2005) In Langmuir 21(5). p.1875-1883- Abstract
- Forces have been measured between silica surfaces with adsorbed surfactants by means of a bimorph surface force apparatus. The surfactants used are the cationic surfactant tetradecyltrimethylammonium bromide (TTAB) and the nonionic surfactant hexakis(ethylene glycol) mono-n-tetradecyl ether (C14E6) as well as mixtures of these two surfactants. The measurements were made at elevated pH, and the effect of salt was studied. At high pH the glass surface is highly charged, which increases the adsorption of TTAB. Despite the low adsorption generally seen for nonionic surfactants on silica at high pH, addition Of C14E6 has a considerable effect on the surface forces between two glass surfaces in a TTAB solution. The barrier force is hardly... (More)
- Forces have been measured between silica surfaces with adsorbed surfactants by means of a bimorph surface force apparatus. The surfactants used are the cationic surfactant tetradecyltrimethylammonium bromide (TTAB) and the nonionic surfactant hexakis(ethylene glycol) mono-n-tetradecyl ether (C14E6) as well as mixtures of these two surfactants. The measurements were made at elevated pH, and the effect of salt was studied. At high pH the glass surface is highly charged, which increases the adsorption of TTAB. Despite the low adsorption generally seen for nonionic surfactants on silica at high pH, addition Of C14E6 has a considerable effect on the surface forces between two glass surfaces in a TTAB solution. The barrier force is hardly affected, but the adhesion is reduced remarkably. Also, addition of salt decreases the adhesion, but increases the barrier force. In the presence of salt, addition Of C14E6 also increases the thickness of the adsorbed layer. The force barrier height is also shown to be related to literature values for surface pressure data in these systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/157631
- author
- Stiernstedt, J ; Froberg, J C ; Tiberg, Fredrik LU and Rutland, M W
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 21
- issue
- 5
- pages
- 1875 - 1883
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:14844334915
- pmid:15723484
- ISSN
- 0743-7463
- DOI
- 10.1021/la047763a
- language
- English
- LU publication?
- yes
- id
- 73a2f33a-721f-4c52-a52d-f79a6a13ed9c (old id 157631)
- date added to LUP
- 2016-04-01 12:36:54
- date last changed
- 2022-01-27 07:28:28
@article{73a2f33a-721f-4c52-a52d-f79a6a13ed9c,
abstract = {{Forces have been measured between silica surfaces with adsorbed surfactants by means of a bimorph surface force apparatus. The surfactants used are the cationic surfactant tetradecyltrimethylammonium bromide (TTAB) and the nonionic surfactant hexakis(ethylene glycol) mono-n-tetradecyl ether (C14E6) as well as mixtures of these two surfactants. The measurements were made at elevated pH, and the effect of salt was studied. At high pH the glass surface is highly charged, which increases the adsorption of TTAB. Despite the low adsorption generally seen for nonionic surfactants on silica at high pH, addition Of C14E6 has a considerable effect on the surface forces between two glass surfaces in a TTAB solution. The barrier force is hardly affected, but the adhesion is reduced remarkably. Also, addition of salt decreases the adhesion, but increases the barrier force. In the presence of salt, addition Of C14E6 also increases the thickness of the adsorbed layer. The force barrier height is also shown to be related to literature values for surface pressure data in these systems.}},
author = {{Stiernstedt, J and Froberg, J C and Tiberg, Fredrik and Rutland, M W}},
issn = {{0743-7463}},
language = {{eng}},
number = {{5}},
pages = {{1875--1883}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Forces between silica surfaces with adsorbed cationic surfactants: Influence of salt and added nonionic surfactants}},
url = {{http://dx.doi.org/10.1021/la047763a}},
doi = {{10.1021/la047763a}},
volume = {{21}},
year = {{2005}},
}