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Effect of Clay Surface Charge on the Emerging Properties of Polystyrene−Organoclay Nanocomposites

Mauroy, Henrik ; Plivelic, Tomás LU ; Hansen, Elisabeth L. ; Fossum, Jon O. ; Helgesen, Geir and Knudsen, Kenneth D. (2013) In Journal of Physical Chemistry C 117(38). p.19656-19663
Abstract
A series of polystyrene-clay nanocomposites, based on two natural clay

types (Na-Montmorillonite and Hectorite) and two synthetic clays (Laponite and Li- Fluorohectorite), were prepared via in situ intercalative polymerization after surface modification with an organic ammonium cation (CTAB). The structural characteristics of

the organically modified clays as well as the nanocomposites were investigated by means of wide-angle X-ray scattering (WAXS), and the thermal properties were studied with TGA.

In the organically modified clays, the silicate interlayer spacing increases, and the magnitude seems to be directly correlated with the amount of clay surface charge. In the nanocomposites, polymer intercalation is... (More)
A series of polystyrene-clay nanocomposites, based on two natural clay

types (Na-Montmorillonite and Hectorite) and two synthetic clays (Laponite and Li- Fluorohectorite), were prepared via in situ intercalative polymerization after surface modification with an organic ammonium cation (CTAB). The structural characteristics of

the organically modified clays as well as the nanocomposites were investigated by means of wide-angle X-ray scattering (WAXS), and the thermal properties were studied with TGA.

In the organically modified clays, the silicate interlayer spacing increases, and the magnitude seems to be directly correlated with the amount of clay surface charge. In the nanocomposites, polymer intercalation is also observed, but partial exfoliation is present,

modifying significantly the morphology of the material. The degree of dispersion of the clay platelets, as well as the resulting properties of the nanocomposites, were found again to be systematically, and almost linearly, correlated with the intrinsic surface charge of the

clays, which varied between 44 and 120 meq/100 g. Increased dispersion was seen in the nanocomposites made from clays with

low surface charge, here Hectorite and Laponite, suggesting that these can be suitable alternatives to the more employed

Montmorillonite for enhancement of thermal properties. The thermal stability was found to be better for the nanocomposites

than for the pure polystyrene. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Polystyrene organoclays nanocomposites, wide angle x-ray scattering, clay, CEC
in
Journal of Physical Chemistry C
volume
117
issue
38
pages
19656 - 19663
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000330162500046
  • scopus:84885058472
ISSN
1932-7447
DOI
10.1021/jp403379h
language
English
LU publication?
yes
id
73595377-dbd4-4554-b1bd-262e18260da1 (old id 4176793)
date added to LUP
2016-04-01 10:56:21
date last changed
2020-02-19 01:34:08
@article{73595377-dbd4-4554-b1bd-262e18260da1,
  abstract     = {A series of polystyrene-clay nanocomposites, based on two natural clay<br/><br>
types (Na-Montmorillonite and Hectorite) and two synthetic clays (Laponite and Li- Fluorohectorite), were prepared via in situ intercalative polymerization after surface modification with an organic ammonium cation (CTAB). The structural characteristics of<br/><br>
the organically modified clays as well as the nanocomposites were investigated by means of wide-angle X-ray scattering (WAXS), and the thermal properties were studied with TGA.<br/><br>
In the organically modified clays, the silicate interlayer spacing increases, and the magnitude seems to be directly correlated with the amount of clay surface charge. In the nanocomposites, polymer intercalation is also observed, but partial exfoliation is present,<br/><br>
modifying significantly the morphology of the material. The degree of dispersion of the clay platelets, as well as the resulting properties of the nanocomposites, were found again to be systematically, and almost linearly, correlated with the intrinsic surface charge of the<br/><br>
clays, which varied between 44 and 120 meq/100 g. Increased dispersion was seen in the nanocomposites made from clays with<br/><br>
low surface charge, here Hectorite and Laponite, suggesting that these can be suitable alternatives to the more employed<br/><br>
Montmorillonite for enhancement of thermal properties. The thermal stability was found to be better for the nanocomposites<br/><br>
than for the pure polystyrene.},
  author       = {Mauroy, Henrik and Plivelic, Tomás and Hansen, Elisabeth L. and Fossum, Jon O. and Helgesen, Geir and Knudsen, Kenneth D.},
  issn         = {1932-7447},
  language     = {eng},
  number       = {38},
  pages        = {19656--19663},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Journal of Physical Chemistry C},
  title        = {Effect of Clay Surface Charge on the Emerging Properties of Polystyrene−Organoclay Nanocomposites},
  url          = {https://lup.lub.lu.se/search/ws/files/2254500/4176814.pdf},
  doi          = {10.1021/jp403379h},
  volume       = {117},
  year         = {2013},
}