Effect of Clay Surface Charge on the Emerging Properties of Polystyrene−Organoclay Nanocomposites
(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:
https://lup.lub.lu.se/record/4176793
- author
- Mauroy, Henrik ; Plivelic, Tomás LU ; Hansen, Elisabeth L. ; Fossum, Jon O. ; Helgesen, Geir and Knudsen, Kenneth D.
- organization
- publishing date
- 2013
- 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
- 2022-03-27 20:54:12
@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}},
keywords = {{Polystyrene organoclays nanocomposites; wide angle x-ray scattering; clay; CEC}},
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 = {{http://dx.doi.org/10.1021/jp403379h}},
doi = {{10.1021/jp403379h}},
volume = {{117}},
year = {{2013}},
}