%0 Journal Article
%T Structure of interacting aggregates of silica nanoparticles in a polymer matrix: Small-angle scattering and Reverse Monte-Carlo simulations
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%+ IRC in Polymer Science and Technology [Leeds]
%+ Institut fuer Festkoeperforschung (IFF)
%A Oberdisse, Julian
%A Hine, Peter
%A Pyckhout-Hintzen, Wim
%< avec comité de lecture
%@ 1744-683X
%J Soft Matter
%I Royal Society of Chemistry
%V 3
%P 476-485
%8 2007-04-07
%D 2007
%Z 0705.3220
%R 10.1039/b614957j
%K nanocomposites
%K small angle scattering
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]Journal articles
%X Reinforcement of elastomers by colloidal nanoparticles is an important application where microstructure needs to be understood - and if possible controlled - if one wishes to tune macroscopic mechanical properties. Here the three-dimensional structure of big aggregates of nanometric silica particles embedded in a soft polymeric matrix is determined by Small Angle Neutron Scattering. Experimentally, the crowded environment leading to strong reinforcement induces a strong interaction between aggregates, which generates a prominent interaction peak in the scattering. We propose to analyze the total signal by means of a decomposition in a classical colloidal structure factor describing aggregate interaction and an aggregate form factor determined by a Reverse Monte Carlo technique. The result gives new insights in the shape of aggregates and their complex interaction in elastomers. For comparison, fractal models for aggregate scattering are also discussed.
%G English
%2 https://hal.science/hal-00148575/document
%2 https://hal.science/hal-00148575/file/Oberdisse_RMC_SoftMatter2007.pdf
%L hal-00148575
%U https://hal.science/hal-00148575
%~ CNRS
%~ UNIV-MONTP2
%~ LCVN
%~ UNIV-MONTPELLIER
%~ UM1-UM2