TY  - JOUR
AU  - Ruckdeschel, Pia
AU  - Philipp, Alexandra
AU  - Kopera, Bernd A. F.
AU  - Bitterlich, Flora
AU  - Dulle, Martin
AU  - Pech-May, Nelson W.
AU  - Retsch, Markus
TI  - Thermal transport in binary colloidal glasses: Composition dependence and percolation assessment
JO  - Physical review / E
VL  - 97
IS  - 2
SN  - 2470-0045
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2018-01738
SP  - 022612
PY  - 2018
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:29548201
UR  - <Go to ISI:>//WOS:000425094300010
DO  - DOI:10.1103/PhysRevE.97.022612
UR  - https://juser.fz-juelich.de/record/844305
ER  -