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Anisotropic clay–polystyrene nanocomposites: Synthesis, characterization and mechanical properties

Mauroy, Henrik; Plivelic, Tomás LU ; Suuronen, Jussi-Petteri; Hage, Fredrik; Fossum, Jon Otto and Knudsen, Kenneth D. (2015) In Applied Clay Science 108. p.19-27
Abstract
Recent studies on clay–polymer nanocomposites have shown prominent improvements in thermal and mechanical propertieswith the addition of quite small amounts of nanometer sized clay particles. The present work presents characterization of anisotropic clay–polystyrene nanocomposites synthesized via a guided self-assembly technique, employing electric fields to align the clay particles into chain-like structures inside the polymer matrix.

Four different kinds of surface modified clay were used as particle additives, namely Hectorite, Laponite, Na-Montmorillonite and Li-Fluorohectorite. The microstructure of the nanocomposites was examined with wide angle X-ray scattering (WAXS), X-ray computed microtomography (XMT) and transmission... (More)
Recent studies on clay–polymer nanocomposites have shown prominent improvements in thermal and mechanical propertieswith the addition of quite small amounts of nanometer sized clay particles. The present work presents characterization of anisotropic clay–polystyrene nanocomposites synthesized via a guided self-assembly technique, employing electric fields to align the clay particles into chain-like structures inside the polymer matrix.

Four different kinds of surface modified clay were used as particle additives, namely Hectorite, Laponite, Na-Montmorillonite and Li-Fluorohectorite. The microstructure of the nanocomposites was examined with wide angle X-ray scattering (WAXS), X-ray computed microtomography (XMT) and transmission electron microscopy (TEM). Thermogravimetric analysis (TGA) was further employed to examine the high-temperature resilience of the nanocomposites before determination of the mechanical properties during compression. The

results showed that the nanocomposites were of the intercalated type with the clay dispersed as ~15–70 nm thick crystallites which in turn aggregated into micrometer sized particles. Alignment of the clay particles into

chains inside the polymer matrix led to differences in mechanical properties compared to nanocomposites having a randomorientation of the clay particles. In particular the aligned polystyrene–fluorohectorite nanocomposite displayed large improvements compared to its non-aligned counterpart. It was also observed that differences in yield strength depended on the compression direction. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electric field self-assembly, Anisotropic nanocomposites
in
Applied Clay Science
volume
108
pages
19 - 27
publisher
Elsevier
external identifiers
  • wos:000352677500003
  • scopus:84923917393
ISSN
1872-9053
DOI
10.1016/j.clay.2015.01.034
language
English
LU publication?
yes
id
f533e360-61d4-4688-8c5e-f345a31339f7 (old id 5153723)
date added to LUP
2015-03-23 13:03:36
date last changed
2017-05-21 03:06:08
@article{f533e360-61d4-4688-8c5e-f345a31339f7,
  abstract     = {Recent studies on clay–polymer nanocomposites have shown prominent improvements in thermal and mechanical propertieswith the addition of quite small amounts of nanometer sized clay particles. The present work presents characterization of anisotropic clay–polystyrene nanocomposites synthesized via a guided self-assembly technique, employing electric fields to align the clay particles into chain-like structures inside the polymer matrix.<br/><br>
Four different kinds of surface modified clay were used as particle additives, namely Hectorite, Laponite, Na-Montmorillonite and Li-Fluorohectorite. The microstructure of the nanocomposites was examined with wide angle X-ray scattering (WAXS), X-ray computed microtomography (XMT) and transmission electron microscopy (TEM). Thermogravimetric analysis (TGA) was further employed to examine the high-temperature resilience of the nanocomposites before determination of the mechanical properties during compression. The<br/><br>
results showed that the nanocomposites were of the intercalated type with the clay dispersed as ~15–70 nm thick crystallites which in turn aggregated into micrometer sized particles. Alignment of the clay particles into<br/><br>
chains inside the polymer matrix led to differences in mechanical properties compared to nanocomposites having a randomorientation of the clay particles. In particular the aligned polystyrene–fluorohectorite nanocomposite displayed large improvements compared to its non-aligned counterpart. It was also observed that differences in yield strength depended on the compression direction.},
  author       = {Mauroy, Henrik and Plivelic, Tomás and Suuronen, Jussi-Petteri and Hage, Fredrik and Fossum, Jon Otto and Knudsen, Kenneth D.},
  issn         = {1872-9053},
  keyword      = {Electric field self-assembly,Anisotropic nanocomposites},
  language     = {eng},
  pages        = {19--27},
  publisher    = {Elsevier},
  series       = {Applied Clay Science},
  title        = {Anisotropic clay–polystyrene nanocomposites: Synthesis, characterization and mechanical properties},
  url          = {http://dx.doi.org/10.1016/j.clay.2015.01.034},
  volume       = {108},
  year         = {2015},
}