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Title: Big Effect of Small Nanoparticles: A Shift in Paradigm for Polymer Nanocomposites

Journal Article · · ACS Nano
 [1];  [2];  [3];  [4];  [5];  [1];  [1];  [3];  [5];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
  2. Univ. of Illinois, Urbana, IL (United States). Dept. of Materials Science and Chemistry
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computer Science and Mathematics Division and Center for Nanophase Materials Science
  4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  5. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry

Polymer nanocomposites (PNCs) are important materials that are widely used in many current technologies and potentially have broader applications in the future due to their excellent property of tunability, light weight and low cost. But, expanding the limits in property enhancement remains a fundamental scientific challenge. We demonstrate that well-dispersed, small (diameter ~1.8 nm) nanoparticles with attractive interactions lead to unexpectedly large and qualitatively new changes in PNC structural dynamics in comparison to conventional composites based on particles of diameter ~10-50 nm. At the same time, the zero-shear viscosity at high temperatures remains comparable to that of the neat polymer, thereby retaining good processibility and resolving a major challenge in PNC applications. These results suggest that the nanoparticle mobility and relatively short lifetimes of nanoparticlepolymer associations open qualitatively new horizons in tunability of macroscopic properties in nanocomposites with high potential for the development of new functional materials.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1341569
Journal Information:
ACS Nano, Vol. 11, Issue 1; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 141 works
Citation information provided by
Web of Science

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The interfacial zone in thin polymer films and around nanoparticles in polymer nanocomposites journal September 2019
Viscoelasticity and Dynamics of Intercalated Polymer/Bentonite Nanocomposites journal May 2018
Correlation between grafted nanoparticle–matrix polymer interface wettability and slip in polymer nanocomposites journal January 2018
Nanoparticle–polymer interfacial layer properties tune fragility and dynamic heterogeneity of athermal polymer nanocomposite films journal January 2018
Continuous Flow Fabrication of Block Copolymer–Grafted Silica Micro‐Particles in Environmentally Friendly Water/Ethanol Media journal October 2018
Poly(triazolyl methacrylate) glycopolymers as potential targeted unimolecular nanocarriers journal January 2019
Tuning the Relaxation of Imprinted Polymer Films with Polymer-Grafted Nanoparticles journal August 2019
Monte Carlo simulation on the dynamics of a semi-flexible polymer in the presence of nanoparticles journal January 2018
Diffusion of Nanoparticles in Polymer Systems journal November 2018
Focus: Structure and dynamics of the interfacial layer in polymer nanocomposites with attractive interactions journal May 2017
Local structure, thermodynamics, and phase behavior of asymmetric particle mixtures: Comparison between integral equation theories and simulation journal June 2019
Formation of ordered mesostructured TiO 2 thin films: a soft coarse-grained simulation study journal January 2017
Interfacial Properties and Hopping Diffusion of Small Nanoparticle in Polymer/Nanoparticle Composite with Attractive Interaction on Side Group journal May 2018
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Diffusivity and glass transition of polymer chains in polymer nanocomposites journal January 2019
Nanoparticle–polymer interfacial layer properties tune fragility and dynamic heterogeneity of athermal polymer nanocomposite films text January 2018
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