Asymmetric Inorganic Membranes Through Langmuir–Blodgett Deposition and Plasma Processing
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- 作者：Evangelia Soterakou ; Konstantinos Beltsios ; Theodore Steriotis and Nick Kanellopoulos
- 关键词：asymmetric inorganic membranes ; Langmuir–Blodgett deposition ; plasma processing ; membrane permeability testing ; micropores
- 刊名：Journal of Porous Materials
- 出版年：2001
- 出版时间：December 2001
- 年：2001
- 卷：8
- 期：4
- 页码：251-264
- 全文大小：275 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Catalysis
Characterization and Evaluation Materials
Physical Chemistry - 出版者：Springer Netherlands
- ISSN：1573-4854
文摘
Nanoporous 7930 Vycor silica tubes with Langmuir–Blodgett (LB) deposited arachidic acid salts undergo oxidative plasma treatment to yield fully inorganic asymmetric membranes. Membranes from precursors with different numbers of LB layers are examined by differential, integral and relative permeability methods for the determination of the structural characteristics of the separating top layer. The membrane top layer is found to be dominated by medium size micropores, while a small population of defective surface sites (partially covered original pores) is also present. The gas separation potential of inorganic asymmetric membranes from ceramic oxide-LB film composites is discussed.