Moisture Desorption Studies on Polymer Hydrated and Vacuum Extruded Bentonite Clay Mat

Article


Loh, Eric Wooi Kee, Wijeyesekera, Devapriya Chitral and Ciupala, A. 2016. Moisture Desorption Studies on Polymer Hydrated and Vacuum Extruded Bentonite Clay Mat. Journal of Heat Transfer. 138 (12), p. 124502.
AuthorsLoh, Eric Wooi Kee, Wijeyesekera, Devapriya Chitral and Ciupala, A.
Abstract

Moisture desorption observations from two bentonite clay mats subjected to ten environmental zones with individually different combinations of laboratory-controlled constant temperatures (between 20 °C and 40 °C) and relative humidity (between 15% and 70%) are presented. These laboratory observations are compared with predictions from mathematical models, such as thin-layer drying equations and kinetic drying models proposed by Page, Wang and Singh, and Henderson and Pabis. The quality of fit of these models is assessed using standard error (SE) of estimate, relative percent of error, and coefficient of correlation. The Page model was found to better predict the drying kinetics of the bentonite clay mats for the simulated tropical climates. Critical study on the drying constant and moisture diffusion coefficient helps to assess the efficacy of a polymer to retain moisture and control desorption through water molecule bonding. This is further substantiated with the Guggenheim–Anderson–De Boer (GAB) desorption isotherm model which is presented.

JournalJournal of Heat Transfer
Journal citation138 (12), p. 124502
ISSN0022-1481
Year2016
PublisherAmerican Society of Mechanical Engineers (ASME)
Accepted author manuscript
License
CC BY-NC-ND
Digital Object Identifier (DOI)doi:10.1115/1.4034150
Publication dates
Print09 Aug 2016
Publication process dates
Deposited18 Aug 2016
Accepted06 Jul 2016
FunderKnowledge Transfer Partnerships
Copyright information© 2016 American Society of Mechanical Engineers
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