Membrane

A membrane isthin, typically planar structure or material that separates two environments. Becausesits between environments or phaseshasfinite volume,can be referredas an interphase rather than an interface. Membranes selectively control mass transport betweenphases or environments.

Biological membranes include:

• cell membrane
• mitochondrial membrane

Artificial membranesused in:

• Reverse osmosis
• Ultrafiltration
• Microfiltration
• Pervaporation
• Dialysis
• Electrodialysis
• Emulsion liquid membranes
• Membrane-based solvent extraction
• Membrane reactors
• Gas permeation
• supported liquid membranes