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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

105 leaves.
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History Created December 11, 2009 · 2 revisions Download catalog record: RDF / JSON

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