Water Vapor Adsorption-Desorption Hysteresis Due to Clustering of Water on Nonporous Surfaces.

ABSTRACT: Water vapor is continuously adsorbed onto and desorbed from all kinds of surfaces depending on changes in relative humidity. Adsorption-desorption hysteresis of water that occurs on various nonporous surfaces and extends down to low relative humidities has been reported for decades, but remains unexplained. Here we show experimentally that such hysteresis is a common phenomenon on metal oxide and mineral surfaces and can be divided into two distinct categories based on the wettability of the adsorbent surface. Type I hysteresis occurs on more hydrophobic surfaces and is associated with adsorption isotherms that behave rather linearly as water saturation is approached, whereas type II hysteresis occurs on more hydrophilic surfaces and is associated with adsorption isotherms that curve steep

SUBMITTER: Viisanen Y 

PROVIDER: S-EPMC11447972 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature