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Technical Briefs

Pressurized Flow in a Mesostructured Silica Modified by Silane Groups

[+] Author and Article Information
Venkata K. Punyamurtula, Aijie Han

Department of Structural Engineering, University of California, San Diego, La Jolla, CA 92093-0085

Yu Qiao1

Department of Structural Engineering, University of California, San Diego, La Jolla, CA 92093-0085yqiao@ucsd.edu

1

Corresponding author.

J. Fluids Eng 131(4), 044501 (Mar 06, 2009) (3 pages) doi:10.1115/1.3089542 History: Received February 23, 2007; Revised March 11, 2008; Published March 06, 2009

By applying a quasihydrostatic pressure, water or electrolyte solution can be compressed into a surface treated MSU-H mesoporous silica. Based on the pressure-volume curves, thermodynamic and kinetic characteristics of the pressurized flow are analyzed. For pure water based system, continuum theory explains the testing data quite well but fails to capture the rate effect. For electrolyte solution based system, the classic interface theory breaks down, probably due to the unique ion behaviors in the nanoenvironment.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

The BJH analysis result of the nanopore volume distribution

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Figure 2

A schematic of the testing system

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Figure 3

Typical sorption isotherm curves of pure water based system. The specific system volume change is defined as the system volume change normalized by the mass of the nanoporous silica.

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Figure 4

The effect of addition of sodium chloride. The silica is surface treated for 3 h.

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