Water diffusion in clays with added organic surfactants

Tensoactive agents may decrease water absorption in clay products like adobes. They modify the characteristics of the surface of clay particles. Characterization of water diffusion through the pores of modified clays is important to apply appropriate surface modifiers and to improve their performanc...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2007-08, Vol.40 (16), p.4991-4997
Main Authors: Pineda-Piñón, J, Mendoza-López, M L, Manzano-Ramírez, A, Pérez-Robles, J F, Vega-Durán, J T
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-liquid interface
Surface physical chemistry
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Summary:Tensoactive agents may decrease water absorption in clay products like adobes. They modify the characteristics of the surface of clay particles. Characterization of water diffusion through the pores of modified clays is important to apply appropriate surface modifiers and to improve their performance. We established a simple model for water diffusion in test samples of defined dimensions to estimate real physical parameters and their effect on water absorption. Adsorption mechanisms are examined based on experimental results. The fitting of the experimental data to the model provides a deep understanding of water adsorption in chemically modified clays. A better agreement between the model and the experimental data is achieved for complex molecules.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/40/16/035