Abstract
The preparation, heat-treatment and leaching of phase separable borosilicate glasses which are of interest as possible semipermeable membranes for reverse osmosis applications are described. It is shown that the kinetics of phase separation are consistent with spinodal decomposition being the phase separation mechanism but this is not a rigorous conclusion. Characterization of the porous glass by electron microscopy and by a gas adsorption balance suggested the presence of fine scale features not resolved by electron microscopy. The microporous glass was shown to function as a reverse osmosis membrane although changes in the performance indicated the need for improved glass compositions and heat-treatment procedures.
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McMillan, P.W., Matthews, C.E. Microporous glasses for reverse osmosis. J Mater Sci 11, 1187–1199 (1976). https://doi.org/10.1007/BF00545135
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DOI: https://doi.org/10.1007/BF00545135