Molecular Fluid Flow in MoS$_2$ Nanoporous Membranes and Hydrodynamics Interactions

TL;DR

This study investigates water flow through MoS$_2$ nanoporous membranes using molecular dynamics simulations, finding that hydrodynamic interactions between adjacent nanopores are negligible at this scale, which is promising for desalination technologies.

Contribution

The paper provides the first molecular dynamics analysis of hydrodynamic interactions in MoS$_2$ nanopores, highlighting their minimal impact on water flux at the nanoscale.

Findings

Hydrodynamic interactions are negligible at the nanoscale in MoS$_2$ nanopores.

Water flux is primarily governed by membrane properties rather than pore interactions.

Results support the potential of MoS$_2$ membranes for efficient desalination.

Abstract

The shift in water security demands improvements in alternative solutions such as saltwater desalination. One of the most efficient technologies in this scope is the reverse osmosis systems, a technology based on a membrane separation process. MoS$_2$ nanoporous membranes are gained attention as a promise for the next-generation high selective and permeable membranes technology. Besides that, one aspect of nanoconfined fluid flow not yet investigated but studied from the fluid mechanics calculations is the impact of induced pressure fields in the water flux in neighboring microfilters, described as hydrodynamic interactions. For this purpose, we studied the water flow through adjacent MoS$_2$ nanopores by running Non-Equilibrium Molecular Dynamics simulations and obtained that in this scale the hydrodynamics interactions are not significant as expected.