ANISOTROPIC REINFORCEMENT OF NANOCOMPOSITES TUNED BY MAGNETIC ORIENTATION OF THE FILLER NETWORK

Abstract : We present a new material which displays anisotropic and mechanical properties tuneable during synthesis under magnetic field. It is formulated by mixing aqueous suspensions of polymer nanolatex and magnetic nanoparticles, coated by a thin silica layer to improve their compatibility with the polymeric matrix, followed by casting. The magnetic properties of these nanoparticles enable their pre-orientation in the resulting nanocomposite when cast under magnetic field. Detailed insight on dispersion by Small Angle Neutron Scattering (SANS) shows chainlike nanoparticle aggregates aligned by the field on the nanometer scale. Applying strain to the nanocomposite parallel to the particle chains shows higher mechanical reinforcement, than when strain is transverse to field. . SANS from strained samples shows that strain parallel to the field induce an organization of the chains while strain perpendicular to the field destroys the chain field-induced ordering. Thus improved mechanical reinforcement is obtained from anisotropic interconnection of nanoparticle aggregates.
Complete list of metadatas

Cited literature [13 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00371971
Contributor : François Boué <>
Submitted on : Tuesday, March 31, 2009 - 1:07:32 AM
Last modification on : Monday, February 10, 2020 - 6:12:13 PM
Long-term archiving on: Saturday, November 26, 2016 - 7:00:22 AM

Files

texte_nano_ferro_latex_oct2007...
Files produced by the author(s)

Identifiers

Collections

Citation

Jacques Jestin, Fabrice Cousin, Isabelle Dubois, Christine Ménager, Ralph Schweins, et al.. ANISOTROPIC REINFORCEMENT OF NANOCOMPOSITES TUNED BY MAGNETIC ORIENTATION OF THE FILLER NETWORK. Advanced Materials, Wiley-VCH Verlag, 2007, 2008 (20), pp.2533-2540. ⟨10.1002/adma.200702758⟩. ⟨hal-00371971⟩

Share

Metrics

Record views

222

Files downloads

243