RO Membrane
Reverse osmosis membrane is a kind of artificial Semipermeable membrane with certain characteristics, which is made by simulating biological Semipermeable membrane. It is the core component of reverse osmosis technology. The principle of reverse osmosis technology is to separate other substances from water based on the fact that they cannot penetrate the Semipermeable membrane under the action of Osmotic pressure higher than 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.
Contact with us
BIMUSS Water Treatment Dep.
Frank Lee
frank.lee@bimuss.com
- Selection of reverse osmosis membrane
- Reverse osmosis membrane cleaning
- Reverse osmosis equipment
Reverse osmosis membrane material
Cellulose acetate
Cellulose acetate is also called acetylcellulose or cellulose acetate. Cellulose acetate is usually made from cotton and wood containing cellulose through esterification and hydrolysis, and then processed into reverse osmosis membrane.
polyamide
Polyamides include two major categories: aliphatic polyamides and aromatic polyamides. The main applications in the 1970s were aliphatic polyamides, such as nylon 4, nylon 6, and nylon 66 films; Currently, the most commonly used is aromatic polyamide film. The membrane materials are aromatic polyamides, aromatic polyamide hydrazide, and some nitrogen-containing aromatic polymers.
The pH range that aromatic polyamide membranes can adapt to can be as wide as 2-11, but they are sensitive to free chlorine in water.
composite membrane
The characteristic of composite membranes is that they are mainly made of the above two materials, which are composed of a very thin dense layer and a porous support layer. The porous support layer, also known as the base film, plays a role in enhancing mechanical strength; The dense layer, also known as the epidermal layer, plays a desalination role, hence it is also known as the desalination layer. The thickness of the desalination layer is generally 50nm, with the thinnest being 30nm.