Artificial membrane
An artificial membrane, also called a synthetic membrane, is a membrane prepared for separation tasks in laboratory and industry. Its active part, which permits selective transport of material, usually consists of polymers or ceramics, seldom glass or metals. A membrane may contain auxiliary parts like mechanical support, drainage, patch etc.
The driving force of the material transport is given by concentration, pressure, electrical or chemical gradient across the membrane. Membranes can be prepared in the form of flat sheets, tubes, capillaries and hollow fibres. Membranes are built in membrane systems like plate and frame, spiral-wound module, hollow fibre module, tube-in-shell module. Some of the most common artificial membranes are polymeric membranes. Under some conditions ceramic membranes can be utilized with advantage.
Such membranes are employed in a wide range of membrane operations, such as ultrafiltration, reverse osmosis, gas separation, dialysis.
- See also: Membrane
Categories
Chemical engineering