Reverse osmosis membrane is a special material and processing methods made of semi-permeable membrane. It can under the action of the external pressure of some components of aqueous solution selectively through, so as to achieve dilution, purification or concentration separation purposes.
Reverse osmosis phenomenon as early as 1748 by the French Able Knelt found. The idea of seawater desalination using the reverse osmosis process was proposed by Haussler in the United States in 1950, but only in 1960 when Loeb HE Sourirajan2 used cellulose acetate as the material to develop the first high separation efficiency of high permeable reverse osmosis After the membrane, reverse osmosis membrane separation may become a reality. Membrane is called the heart of reverse osmosis process, in a sense, the quality of reverse osmosis system, the level of the key lies in the level of reverse osmosis membrane performance is good or bad, the first cellulose acetate reverse osmosis membrane is used for water Desalination, however, with the development of various types of reverse osmosis membrane and membrane performance continues to improve, the development of osmotic membrane separation has not only include water treatment areas, namely, water desalination, water preparation, water reuse and wastewater recovery, Including food processing, biology and biomedical research.
