Effective viscosity of glycerin in a nanoporous silica gel

Abstract

Vapor-liquid phase coexistence and transport properties of two-dimensional oligomers J. Chem. Phys. 137, 084701 (2012) Probing the mobility of supercooled liquid 3-methylpentane at temperatures near the glass transition using rare gas permeation J. Chem. Phys. 137, 064509 (2012) Liquid nitrogen in fluid dynamics: Visualization and velocimetry using frozen particles Rev. Sci. Instrum. 83, 085101 (2012) Interfacial friction between semiflexible polymers and crystalline surfacesThe infiltration of glycerin in a lyophobic nanoporous silica gel is investigated experimentally, and the effective interfacial tension and viscosity are discussed. While the simple superposition principle can be employed for the analysis of interfacial tension, in a nanopore the effective liquid viscosity is no longer a material constant. It is highly dependent on the pore size and the loading rate, much smaller than its bulk counterpart.

Prediction of the viscosity of water confined in carbon nanotubes

“…This is consistent with the present results of the viscosity of the confined water. A similar presentation is also given by Han et al (2008) to explain the decrease in the effective viscosity of the glycerin inside nanopores. From Fig.…”

“…Some previous works also reported the viscosity of water inside SWCNTs. Chen et al (2008) and Han et al (2008) measured the viscosity of the fluid inside the nanopores with the diameter in the range of 20-100 Å . The results reveal a decrease in the viscosity, which qualitatively validate the present results.…”

“…However, these two existed methods have their intrinsic limitations and difficulties (Bertolini and Tani 1995;Powell et al 1941; Thomas and McGaughey 2008). Besides the temperature and the pressure dependences, the viscosity is also a scale-dependent property which has been reported by a few works Han et al 2008;Liu et al 2005; Thomas and McGaughey 2008). Nevertheless, in most previous studies on the nanoflow through the continuum theory, the viscosity of the confined water is always substituted by the viscosity of the bulk water to predict the mass flow rate (Holt et al 2006;Joseph and Aluru 2008).…”

Nanoconfinement induced anomalous water diffusion inside carbon nanotubes

“…The geometrical confinement, whose characteristic length is comparable to the molecular diameter, could induce a dramatic change in the transport property and flow behavior of fluids Chen Q et al 2010;Chen X et al 2008;Devi et al 2010;Han et al 2008;Li et al 2010;Liu et al 2005a, b;Striolo 2006;McGaughey 2008, 2009;Thomas et al 2010;Zhang et al 2010). Understanding the size dependence of the transport property of water inside the nanochannels is a promising and significant issue.…”

Effects of addition of potassium chloride and ethylene glycol on nanofluidic behaviors

“…At such a small length scale no regular viscosity can be defined, as the relatively motion of liquid molecules cannot be fully developed. As a result, the effective viscosity is considerably reduced [36], so that the internal friction effect becomes secondary.…”