Adsorption of cationic, anionic and hydrophobically modifie polyacrylamides on silica surfaces
(2003) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 231(1-3). p.195-205- Abstract
- The adsorption of modified polyacrylamides (PAM) at the silica surface has been studied by ellipsometry. To study the influence of the type of modification of the polyacrylamide on the adsorption behaviour, we have used cationic, anionic and hydrophobically modified polyacrylamides with varying charge density and degree of hydrophobisation. The adsorbed amount and adsorbed layer thickness were obtained at a neutral pH and at a constant ionic strength (C-KCl = 0.1 M). The effect of surfactant present during the polymerisation process has also been investigated. Cationic modified polyacrylamides have been found to adsorb most strongly onto the silica surface and a large overcompensation of the surface charge has been observed in all cases.... (More)
- The adsorption of modified polyacrylamides (PAM) at the silica surface has been studied by ellipsometry. To study the influence of the type of modification of the polyacrylamide on the adsorption behaviour, we have used cationic, anionic and hydrophobically modified polyacrylamides with varying charge density and degree of hydrophobisation. The adsorbed amount and adsorbed layer thickness were obtained at a neutral pH and at a constant ionic strength (C-KCl = 0.1 M). The effect of surfactant present during the polymerisation process has also been investigated. Cationic modified polyacrylamides have been found to adsorb most strongly onto the silica surface and a large overcompensation of the surface charge has been observed in all cases. For cationic modified polyacrylamides having additional hydrophobic groups the adsorbed amount decreases with density of hy
rophobic groups, and the adsorbed layer thickness is larger. Anionic modified
polyacrylamides also adsorb onto the negative silica surface, though
the adsorbed amounts are small. The presence of the surfactant Tween 80
leads to an increase in the adsorbed amount for the polymers which
adsorb weakly in the absence of the surfactant. However, for the
polymers, which have already shown a good ability to adsorb on silica,
the addition of surfactant has no significant effect on the adsorbed
amount. (C) 2003 Elsevier B.V. All rights
reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/122184
- author
- Samoshina, Yulia LU ; Diaz, A ; Becker, Y ; Nylander, Tommy LU and Lindman, Björn LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Non-ionic surfactant, Silica, Ellipsometry, Hydrophobic PAM, Anionic PAM, Adsorption, Modified polyacrylamides, Cationic PAM
- in
- Colloids and Surfaces A: Physicochemical and Engineering Aspects
- volume
- 231
- issue
- 1-3
- pages
- 195 - 205
- publisher
- Elsevier
- external identifiers
-
- wos:000188806000017
- scopus:0347301710
- ISSN
- 0927-7757
- DOI
- 10.1016/j.colsurfa.2003.09.005
- language
- English
- LU publication?
- yes
- id
- 62f0fd5a-0459-4aca-bcc8-6aba400a6aae (old id 122184)
- date added to LUP
- 2016-04-01 16:26:50
- date last changed
- 2022-04-15 04:39:22
@article{62f0fd5a-0459-4aca-bcc8-6aba400a6aae,
abstract = {{The adsorption of modified polyacrylamides (PAM) at the silica surface has been studied by ellipsometry. To study the influence of the type of modification of the polyacrylamide on the adsorption behaviour, we have used cationic, anionic and hydrophobically modified polyacrylamides with varying charge density and degree of hydrophobisation. The adsorbed amount and adsorbed layer thickness were obtained at a neutral pH and at a constant ionic strength (C-KCl = 0.1 M). The effect of surfactant present during the polymerisation process has also been investigated. Cationic modified polyacrylamides have been found to adsorb most strongly onto the silica surface and a large overcompensation of the surface charge has been observed in all cases. For cationic modified polyacrylamides having additional hydrophobic groups the adsorbed amount decreases with density of hy<br/><br>
rophobic groups, and the adsorbed layer thickness is larger. Anionic modified<br/><br>
polyacrylamides also adsorb onto the negative silica surface, though<br/><br>
the adsorbed amounts are small. The presence of the surfactant Tween 80<br/><br>
leads to an increase in the adsorbed amount for the polymers which<br/><br>
adsorb weakly in the absence of the surfactant. However, for the<br/><br>
polymers, which have already shown a good ability to adsorb on silica,<br/><br>
the addition of surfactant has no significant effect on the adsorbed<br/><br>
amount. (C) 2003 Elsevier B.V. All rights<br/><br>
reserved.}},
author = {{Samoshina, Yulia and Diaz, A and Becker, Y and Nylander, Tommy and Lindman, Björn}},
issn = {{0927-7757}},
keywords = {{Non-ionic surfactant; Silica; Ellipsometry; Hydrophobic PAM; Anionic PAM; Adsorption; Modified polyacrylamides; Cationic PAM}},
language = {{eng}},
number = {{1-3}},
pages = {{195--205}},
publisher = {{Elsevier}},
series = {{Colloids and Surfaces A: Physicochemical and Engineering Aspects}},
title = {{Adsorption of cationic, anionic and hydrophobically modifie polyacrylamides on silica surfaces}},
url = {{http://dx.doi.org/10.1016/j.colsurfa.2003.09.005}},
doi = {{10.1016/j.colsurfa.2003.09.005}},
volume = {{231}},
year = {{2003}},
}