BASIC KNOWLEDGE OF SEPARATION TECHNOLOGY
Materials used in membranes
Main materials used in organic membranes
The organic membrane is a generic term for membranes made of macromolecular polymers, such as polyethylene (PE), polyvinylidene difluoride (PVDF), polytetrafluoroethylene (PTFE), polypropylene (PP), cellulose acetate (CA), polyacrylonitrile (PAN), polyimide (PI), polysulfone (PS), and polyethersulfone (PES).
Usable material is broadly determined by the needed pore size and the method of membrane manufacture.
Membrane properties (hydrophilicity, hydrophobicity, thermal resistance, chemical resistance, mechanical strength, life, etc. ) vary depending on the material and manufacturing method.
Main materials used in inorganic membranes
The inorganic membrane is a generic term for membranes made of inorganic matter, such as ceramic, glass, and metal membranes. The main materials are aluminum oxide (alumina, Al2O3), zirconium oxide (zirconia, ZrO2), titanium oxide (titania, TiO2), stainless steel (SUS), and glass (SPG).
Like organic membranes, the properties vary depending on the material and manufacturing method.
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Information on other separation technologies
The characteristics of separation technologies used for solid-liquid separation, including membrane filtration, are summarized.
Classification of membrane filtration and target components are explained.
Membrane filtration, one of the separation technologies, will be briefly explained.
Separation methods that use pressure difference are outlined.
See here for the differences between dead-end filtration and cross-flow filtration.
Brief examples of membrane separation technology applications for each membrane type.