| Issue |
Europhys. Lett.
Volume 36, Number 2, October II 1996
|
|
|---|---|---|
| Page(s) | 153 - 158 | |
| Section | Cross-disciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i1996-00202-4 | |
| Published online | 01 September 2002 | |
Nanosized hairy grains: A model system to understand the reinforcement
1
Laboratoire Léon-Brillouin, CNRS-CEA, Centre d'Etudes Nucléaires de Saclay,
91191 Gif-Sur-Yvette Cedex, France
2
FAST, URA 871 du CNRS, Université Paris-Sud - 91405 Orsay Cedex, France
3
Institut Curie, UMR 168 du CNRS, Section de Recherche, 11 rue Pierre et Marie
Curie, 75231 Paris Cedex 05, France
4
Rhône-Poulenc, Usine Silicones - BP22, 69191 Saint-Fons Cedex, France
Received:
28
June
1996
Accepted:
30
August
1996
We have prepared nanosized hairy grains by grafting long
polydimethylsiloxane chains onto silica particles of radius
. The synthesis method allows the particles to keep
in truly stable suspension at any stage of their preparation. In
dilute suspension, these hairy grains behave as repulsive soft
spheres. Above a certain concentration (of the order of 
), the polymer chains form bridges between the particles due
to physical adsorption, which induces a gelation of the suspension. If
the solvent is completely removed, a reinforced elastomer is
formed. Its mechanical properties (which can be exceptionally good)
are entirely determined by the design of the ultimate particles.
PACS: 81.05.Qk – Reinforced polymers and polymer-based composites / 82.70.Dd – Colloids / 61.41.+e – Polymers, elastomers, and plastics
© EDP Sciences, 1996
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