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January 24, 2010 | History

On the determination of sub-second water-cellulose sorption kinetics using mass spectrometry 1 edition

On the determination of sub-second water-cellulose sorption kinetics u ...
David W. Schryer

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On the determination of sub-second water-cellulose sorption kinetics using mass spectrometry.

Published 2005 .
Written in English.

About the Book

The rates of water adsorption/desorption to/from MicroCrystalline Cellulose (MCC) were measured after a switch in Relative Humidity (RH) using Mass Spectrometry (MS). Mass transfer was minimised such that the rates were controlled by molecular kinetics---The fastest rate possible. The amount of water adsorbed/desorbed from MCC agreed with the isotherm, giving a direct test of the data and method. Desorption kinetics from monolayer water coverage (0.026 gH2OgMCC ) to bone dry gas exhibit 1st order behaviour with kd = 0.026s-1. Adsorption is initially rapid but quickly slows to a rate much slower than desorption from the same conditions. This is attributed to slow molecular rearrangement of the less-ordered cellulose on the MCC microfibrils, that creates more capacity for water uptake.

Edition Notes

Source: Masters Abstracts International, Volume: 44-02, page: 0969.

Thesis (M.A.Sc.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.

GERSTEIN MICROTEXT copy on microfiche (2 microfiches).

The Physical Object

Pagination
105 leaves.
Number of pages
105

ID Numbers

Open Library
OL19216363M
ISBN 10
0494071443

History

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January 24, 2010 Edited by WorkBot add more information to works
December 11, 2009 Created by WorkBot add works page