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Thermal transport in binary colloidal glasses : Composition dependence and percolation assessment

Title data

Ruckdeschel, Pia ; Philipp, Alexandra ; Kopera, Bernd A. F. ; Bitterlich, Flora ; Dulle, Martin ; Pech-May, Nelson W. ; Retsch, Markus:
Thermal transport in binary colloidal glasses : Composition dependence and percolation assessment.
In: Physical Review E. Vol. 97 (15 February 2018) Issue 2 . - 022612. - 10 S..
ISSN 1550-2376
DOI: https://doi.org/10.1103/PhysRevE.97.022612

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft
VolkswagenStiftung

Abstract in another language

The combination of various types of materials is often used to create superior composites that outperform the pure phase components. For any rational design, the thermal conductivity of the composite as a function of the volume fraction of the filler component needs to be known. When approaching the nanoscale, the homogeneous mixture of various components poses an additional challenge. Here, we investigate binary nanocomposite materials based on polymer latex beads and hollow silica nanoparticles. These form randomly mixed colloidal glasses on a sub-μm scale. We focus on the heat transport properties through such binary assembly structures. The thermal conductivity can be well described by the effective medium theory. However, film formation of the soft polymer component leads to phase segregation and a mismatch between existing mixing models. We confirm our experimental data by finite element modeling. This additionally allowed us to assess the onset of thermal transport percolation in such random particulate structures. Our study contributes to a better understanding of thermal transport through heterostructured particulate assemblies.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry I - Univ.-Prof. Dr. Stephan Förster
Profile Fields > Advanced Fields > Polymer and Colloid Science
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Research Institutions > Collaborative Research Centers, Research Unit
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 21 Feb 2018 08:05
Last Modified: 21 Feb 2018 08:05
URI: https://eref.uni-bayreuth.de/id/eprint/42325