How Tuning Interfaces Impacts the Dynamics and Structure of Polymer Nanocomposites Simultaneously - CNRS - Centre national de la recherche scientifique Access content directly
Journal Articles ACS Applied Materials & Interfaces Year : 2023

How Tuning Interfaces Impacts the Dynamics and Structure of Polymer Nanocomposites Simultaneously

Anne-Caroline Genix
Vera Bocharova
Bobby Carroll
Alexei Sokolov
Julian Oberdisse

Abstract

Fundamental understanding of macroscopic properties of polymer nanocomposites (PNCs) remains difficult due to the complex interplay of microscopic dynamics and structure, namely interfacial layer relaxations and three-dimensional nanoparticle arrangements. The effect of surface modification by alkyl methoxysilanes at different grafting densities has been studied in PNCs made of poly(2-vinylpyridine) and spherical 20 nm silica nanoparticles (NPs). The segmental dynamics has been probed by broadband dielectric spectroscopy, and the filler structure by small-angle X-ray scattering and reverse Monte Carlo simulations. By combining the particle configurations with the interfacial layer properties, it is shown how surface modification tunes the attractive polymer-particle interactions: bare NPs slow down the polymer interfacial layer dynamics over a thickness of ca. 5 nm, while grafting screens these interactions. Our analysis of interparticle spacing and segmental dynamics provides unprecedented insight into the effect of surface modification on the main characteristics of PNCs: particle interactions and polymer interfacial layers.
Fichier principal
Vignette du fichier
Hydrophobic_manuscipt_C18.pdf (1.71 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04244949 , version 1 (19-10-2023)

Identifiers

Cite

Anne-Caroline Genix, Vera Bocharova, Bobby Carroll, Philippe Dieudonné-George, Edouard Chauveau, et al.. How Tuning Interfaces Impacts the Dynamics and Structure of Polymer Nanocomposites Simultaneously. ACS Applied Materials & Interfaces, 2023, 15 (5), pp.7496-7510. ⟨10.1021/acsami.2c18083⟩. ⟨hal-04244949⟩
4 View
4 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More