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Effect of CO2 on the water slip flow at silica surfaces for nanometer slit pores of talc

Journal Article · · Colloids and Surfaces. A, Physicochemical and Engineering Aspects

In our previous study, Molecular Dynamics (MD) simulated water flow with no dissolved gas in nanometer slit pores of the hydrophobic talc surfaces revealed a slip length of about 0.5 nm, which is close to the size of “water exclusion zone” but much less than experimental slip length. Atomic Force Microscopy (AFM) imaging confirmed the presence of pancake shape nanobubbles at the hydrophobic talc (001) surface (size from tens to hundreds of nanometers). The effect of CO2 on water slip flow in talc nanopores is reported to reveal the importance of dissolved gas for confined fluid flow. MD simulated 7 nm CO2 nanobubbles were found to attach and spread at the talc (001) surface, consistent with the AFM observation. Simulated CO2 saturated water flow in the slit pores of talc (001) surfaces predicted the generation of CO2 nanobubbles at the end of the slit pore, due to the stabilization of a CO2 film at the talc (001) surfaces and a water barrier at the edge surfaces of talc. A “critical thickness” of about 1.5 nm was found for CO2 nanobubbles to be stabilized at the end of the talc (001) surface. With 1.5 nm CO2 nanobubbles at the talc (001) surface of a 6 nm slit pore, a water slip length of 1.8 nm was determined. Furthermore, the nanometer slit pore simulations with dissolved CO2 in water revealed an increased slip length. It is expected that an increased slip length value would be found with an increased CO2 film thickness.

Research Organization:
University of Utah, Salt Lake City, UT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019285
OSTI ID:
2475645
Journal Information:
Colloids and Surfaces. A, Physicochemical and Engineering Aspects, Journal Name: Colloids and Surfaces. A, Physicochemical and Engineering Aspects Vol. 698; ISSN 0927-7757
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (31)

Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Flow in porous media I: A theoretical derivation of Darcy's law journal January 1986
Nanofluidics: what is it and what can we expect from it? journal April 2005
Wetting of nanophases: Nanobubbles, nanodroplets and micropancakes on hydrophobic surfaces journal August 2015
Water intrusion/extrusion in hydrophobized mesoporous silica gel in a wide temperature range: Capillarity, bubble nucleation and line tension effects journal January 2014
Spatial characterization of heterogeneous nanopore surfaces from XCT scans of Niobrara shale journal July 2019
Simulation and analysis of slip flow of water at hydrophobic silica surfaces of nanometer slit pores journal October 2021
The hydrophobic surface state of talc as influenced by aluminum substitution in the tetrahedral layer journal February 2019
A molecular dynamics simulation study of water structure and adsorption states at talc surfaces journal October 2007
Interfacial water structure and the wetting of mineral surfaces journal November 2016
Experiments on transition in plane Couette flow journal February 1992
Hydrophobic Solvation of Gases (CO 2 , CH 4 , H 2 , Noble Gases) in Clay Interlayer Nanopores journal November 2017
Attachment, Coalescence, and Spreading of Carbon Dioxide Nanobubbles at Pyrite Surfaces journal October 2018
Slip Flow in Colloidal Crystals for Ultraefficient Chromatography journal June 2012
Viscosity of Aqueous CO2Solutions Measured by Dynamic Light Scattering journal June 2003
Structure and Dynamics of the TIP3P, SPC, and SPC/E Water Models at 298 K journal November 2001
Molecular Structure of the Water−Supercritical CO 2 Interface journal December 2001
Molecular Models of Hydroxide, Oxyhydroxide, and Clay Phases and the Development of a General Force Field journal January 2004
Molecular Mechanism of CO 2 and SO 2 Molecules Binding to the Air/Liquid Interface of 1-Butyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid: A Molecular Dynamics Study with Polarizable Potential Models journal September 2010
Analysis of the Subcritical Carbon Dioxide−Water Interface journal June 2011
Atomic Force Microscope Images of Nanobubbles on a Hydrophobic Surface and Corresponding Force−Separation Data journal January 2002
On Fluid/Wall Slippage journal April 2002
Slip Flow through Colloidal Crystals of Varying Particle Diameter journal December 2012
Sum frequency generation (SFG) study of the pH-dependent water structure on a fused quartz surface modified by an octadecyltrichlorosilane (OTS) monolayer journal January 2001
A generating mechanism for apparent fluid slip in hydrophobic microchannels journal May 2004
Hydraulic transport across hydrophilic and hydrophobic nanopores: Flow experiments with water and n -hexane journal January 2016
Slip-flow lattice-Boltzmann simulations in ducts and porous media: A full rehabilitation of spurious velocities journal October 2018
Images of Nanobubbles on Hydrophobic Surfaces and Their Interactions journal October 2001
Silica surface states and their wetting characteristics journal February 2020
Controlling Subsurface Fractures and Fluid Flow: A Basic Research Agenda report May 2015
AFM Slip Length Measurements for Water at Selected Phyllosilicate Surfaces journal October 2021

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