COMPETING DRYING AND REACTION MECHANISMS IN THE FORMATION OF SOL-TO-GEL FILMS, FIBERS, AND SPHERES
作者:
RichardA. Cairncross,
LorraineF. Francis,
L. E. Scriven,
期刊:
Drying Technology
(Taylor Available online 1992)
卷期:
Volume 10,
issue 4
页码: 893-923
ISSN:0737-3937
年代: 1992
DOI:10.1080/07373939208916487
出版商: Taylor & Francis Group
关键词: diffusion;drying model;gelling model;microsphere;silica;sol-gel;tetramethoxysilane;TMOS
数据来源: Taylor
摘要:
Drying of films, fibers, and spheres undergoing sol-to-gel transformation is greatly affected by the strong dependence of the diffusion coefficients on composition, molecular weight, and temperature. This dependence is probed by solving the equations of mass and heat transfer by diffusion or conduction and associated convection, along with chemical reaction. A one-dimensional analysis is used that encompasses the planar, cylindrical, and spherical configurations. The solutions are obtained by Galerkin's method with finite element basis functions and entail large-scale computation.
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