Fluid Behavior in Nanoporous Silica.

ABSTRACT: We investigate dynamics of water (H₂O) and methanol (CH₃OH and CH₃OD) inside mesoporous silica materials with pore diameters of 4.0, 2.5, and 1.5 nm using low-field (LF) nuclear magnetic resonance (NMR) relaxometry. Experiments were conducted to test the effects of pore size, pore volume, type of fluid, fluid/solid ratio, and temperature on fluid dynamics. Longitudinal relaxation times (T₁) and transverse relaxation times (T₂) were obtained for the above systems. We observe an increasing deviation in confined fluid behavior compared to that of bulk fluid with decreasing fluid-to-solid ratio. Our results show that the surface area-to-volume ratio is a critical parameter compared to pore diameter in the relaxation dynamics of confined wa

SUBMITTER: Ok S 

PROVIDER: S-EPMC7485247 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature