Does polar interaction influence medium viscosity? A computer simulation investigation using model liquids

Kinetic Theory and Shear Viscosity of Dense Dipolar Hard Sphere Liquids

Transport properties of dense fluids are fundamentally challenging, because the powerful approaches of equilibrium statistical physics cannot be applied. Polar fluids compound this problem, because the long-range interactions preclude the use of a simple effective diameter approach based solely on hard spheres. Here, we develop a kinetic theory for dipolar hard-sphere fluids that is valid up to high density. We derive a mathematical approximation for the radial distribution function at contact directly from the equation of state, and use it to obtain the shear viscosity. We also perform molecular-dynamics simulations of this system and extract the shear viscosity numerically. The theoretical results compare favorably to the simulations.

An absorption mechanism and polarity-induced viscosity model for CO2 capture using hydroxypyridine-based ionic liquids

A series of new hydroxypyridine-based ionic liquids (ILs) are synthesized and applied in CO₂ capture through chemical absorption.