Molecular dynamics simulation in the application of direct air dehumidification by electrodialysis method

The independent air dehumidification has attracted more and more attention in recent years. In this study, using the method of molecular dynamics simulation, water vapor molecules diffusion in the graphene oxide membrane by electrodialysis method is studied. We hypothesis that graphene oxide membrane can adsorb the water vapor molecules more easily under different electric fields. Meanwhile, the interactions between water molecules and the oxygen-containing functional groups of graphene oxide membrane play an important part in diffusion, including Van der Waals force, coulombic force and hydrogen bonding. However, the result reveals that with the increase of the magnitude of electric field strength, the diffusion coefficients of water vapor molecules change due to the strong hydrogen bonding and the polar orientation of water molecules. Therefore, external electric fields are conductive to the diffusion of water vapor molecules under the specific range of electric intensity value.