TY  - JOUR
AU  - Frielinghaus, Henrich
AU  - Koch, Kerstin
AU  - Antonio, Viviane Pecanha
AU  - Noda, Yohei
AU  - Koizumi, Satoshi
TI  - The locally columnar model for clay/polymer systems: Connections to scattering experiments
JO  - Journal of colloid and interface science
VL  - 544
SN  - 0021-9797
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2019-01733
SP  - 172 - 177
PY  - 2019
AB  - A tight connection of scattering to thermodynamic models is missing for clay systems. A new approach called “locally columnar model” gives an attempt for making this connection. The scattering model assumes an up-lining of clay particles with strong paracrystalline order and refers to a chemical potential/distance dependence. The thermodynamic model assumes a bidisperse distance distribution and gives input to the scattering model. Experimentally, polymer/clay systems with many molecular polymer masses were studied showing all very similar scattering curves. While the dominating bulk phase shows only the same weak tendency to stack formation for all molecular polymer masses, one coexisting phase with stronger stack formation was identified. The latter sample was used to determine the thickness of the clay platelets with adsorbed polymer that was then used to model the dominating bulk phase. The comparisons to the theory revealed that (a) most polymers are tightly bound to the clay, and (b) an agreement between the modeling and the theory was achieved. The main result of the experiments is the fraction of free polymers of 1:2400 that are not tightly bound to the clay particles.
LB  - PUB:(DE-HGF)16
C6  - pmid:30836259
UR  - <Go to ISI:>//WOS:000463310100018
DO  - DOI:10.1016/j.jcis.2019.02.091
UR  - https://juser.fz-juelich.de/record/861201
ER  -