The full name of RO membrane is reverse osmosis membrane. The concept doesn’t show up often in our daily life. No wonder everyone is quite unfamiliar with it.
But I will use the simplest language to make it clear.
Before we talk about reverse osmosis, let’s have a look at the term osmosis, which is a common phenomenon in the natural world. Penetrating into the enemy's interior is called infiltration. The water slowly soaks the paper, which is called infiltration, and the flow of water from the Yangtze River into the sea is also called infiltration.
Therefore, penetration is a natural phenomenon that can occur without external force.
And reverse osmosis, as the name suggests, is the opposite of this process.
We use external force to invert the seawater and let the seawater flow into the Yangtze River. This process is called reverse osmosis.
We put high-concentration seawater under pressure to force the seawater to pass through a high-density mesh. After the mesh is filtered, the water concentration becomes lower. And this mesh, is called reverse osmosis membrane.
What is the reverse osmosis membrane made of? After nearly a hundred years of research and selection, people finally found materials synthesized with aromatic polyamides are affordable and have good filtering effects. Therefore, a reverse osmosis membrane made of polyamide is commonly used. It is a kind of high molecular nano-level chemical synthesis material.
What is the function of RO membrane? It can filter out around 99% of inorganic salts and 100% of bacteria and viruses with pure physical structure, to purify the water. In current water treatment industry, especially in water purification industry, RO membranes are widely used to filter out pure water due to its durable services, affordable cost, and good effects.