Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 61: Microfluidics (joint session DY/CPP)

DY 61.5: Vortrag

Freitag, 5. April 2019, 11:00–11:15, H6

Dissipative particle dynamics simulation for viscosity behavior induced by self-assembly of surfactants confined in nanotubes — •Yusei Kobayashi and Noriyoshi Arai — Kindai University, Higashiosaka, Japan

Self-assembly is one of the most studied branches of materials chemistry, and has attracted a lot of attention due to its diverse potential applications in electronics, engineering, biomedical, and optical fields. Thus far, many previous studies have reported on the self-assembly of surfactants in solution for developing various functional materials. On the other hand, the chemical nature of the wall surface on the nano/micro scale is another key parameter which can drastically change the self-assembled structures. To study such wall-induced effects on the self-assembled structures and their rheological properties, we performed computer simulations of surfactant solutions in chemically distinct nanotubes under pipe flow. In particular, we determined the shear viscosity as a function of (local) shear rate in hydrophilic, hydroneutral, and hydrophobic nanotubes at different surfactant concentrations. Here, we found that the addition of surfactant molecules led to characteristic viscosity behaviors with rich steady-state morphologies.