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Modeling of Bottle-Brush Polymer Adsorption onto Mica and Silica Surfaces

Linse, Per LU and Claesson, Per M. (2009) In Macromolecules 42(16). p.6310-6318
Abstract
The adsorption of a series of charged bottle-brush polymers with side chains of constant length on mica and silica surfaces is modeled using a lattice mean-field theory, and the predicted results are compared to corresponding experimental data. The bottle-brush polymers are modeled as being composed of two types of main-chain segments: charged segments and uncharged segments with an attached side chain. The composition variable X denotes the percentage of charged main-chain segments and ranges from X = 0 (uncharged bottle-brush polymer) to X = 100 (linear polyelectrolyte). The mica-like surface possesses a constant negative surface charge density and no special affinity, whereas the silica-like surface has a constant negative surface... (More)
The adsorption of a series of charged bottle-brush polymers with side chains of constant length on mica and silica surfaces is modeled using a lattice mean-field theory, and the predicted results are compared to corresponding experimental data. The bottle-brush polymers are modeled as being composed of two types of main-chain segments: charged segments and uncharged segments with an attached side chain. The composition variable X denotes the percentage of charged main-chain segments and ranges from X = 0 (uncharged bottle-brush polymer) to X = 100 (linear polyelectrolyte). The mica-like surface possesses a constant negative surface charge density and no special affinity, whereas the silica-like surface has a constant negative surface potential and a positive affinity for the side chains of the bottle-brush polymers. The model is able to reproduce a number of salient experimental features characterizing the adsorption of the bottle-brush polymers for the full range of the composition variable X on the two surfaces, and thereby quantifying the different nature of the two surfaces with respect to electrostatic properties and nonelectrostatic affinity for the polymer. In particular, the surface excess displays a maximum at X approximate to 50 for the mica surface and at X approximate to 10 for the silica surface. Moreover, the thickest adsorbed layer is obtained at X = 10-25. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Macromolecules
volume
42
issue
16
pages
6310 - 6318
publisher
The American Chemical Society
external identifiers
  • wos:000269043200056
  • scopus:68949188136
ISSN
0024-9297
DOI
10.1021/ma900896y
language
English
LU publication?
yes
id
dbc9fdcc-d8cf-4e49-90d8-af0c2cb2196f (old id 1477229)
date added to LUP
2009-09-23 13:01:43
date last changed
2017-10-22 03:36:04
@article{dbc9fdcc-d8cf-4e49-90d8-af0c2cb2196f,
  abstract     = {The adsorption of a series of charged bottle-brush polymers with side chains of constant length on mica and silica surfaces is modeled using a lattice mean-field theory, and the predicted results are compared to corresponding experimental data. The bottle-brush polymers are modeled as being composed of two types of main-chain segments: charged segments and uncharged segments with an attached side chain. The composition variable X denotes the percentage of charged main-chain segments and ranges from X = 0 (uncharged bottle-brush polymer) to X = 100 (linear polyelectrolyte). The mica-like surface possesses a constant negative surface charge density and no special affinity, whereas the silica-like surface has a constant negative surface potential and a positive affinity for the side chains of the bottle-brush polymers. The model is able to reproduce a number of salient experimental features characterizing the adsorption of the bottle-brush polymers for the full range of the composition variable X on the two surfaces, and thereby quantifying the different nature of the two surfaces with respect to electrostatic properties and nonelectrostatic affinity for the polymer. In particular, the surface excess displays a maximum at X approximate to 50 for the mica surface and at X approximate to 10 for the silica surface. Moreover, the thickest adsorbed layer is obtained at X = 10-25.},
  author       = {Linse, Per and Claesson, Per M.},
  issn         = {0024-9297},
  language     = {eng},
  number       = {16},
  pages        = {6310--6318},
  publisher    = {The American Chemical Society},
  series       = {Macromolecules},
  title        = {Modeling of Bottle-Brush Polymer Adsorption onto Mica and Silica Surfaces},
  url          = {http://dx.doi.org/10.1021/ma900896y},
  volume       = {42},
  year         = {2009},
}