Reverse osmosis membrane is an artificial semi permeable membrane made by simulating biological semi permeable membranes with certain characteristics, and is the core component of reverse osmosis technology. The principle of reverse osmosis technology is to separate other substances from water based on their inability to penetrate a semi permeable membrane under conditions higher than the osmotic pressure of the solution. The pore size of reverse osmosis membranes is very small, so they can effectively remove dissolved salts, colloids, microorganisms, organic substances, etc. from water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process, and easy operation.
The reverse osmosis membrane should have the following characteristics:
(1) it should have an efficient desalination rate at high flow rates;
(2) Having high mechanical strength and service life;
(3) Able to function under low operating pressure;
(4) Capable of withstanding the effects of chemical or biochemical processes;
(5) Less affected by factors such as pH value and temperature;
(6) The source of raw materials for film making is easy, the processing is simple, and the cost is low.