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Classification of ultrafiltration membranes

Nov 04, 2019

[Ultrafiltration membranes are classified into inorganic membranes and organic membranes depending on the membrane material, and inorganic membranes are mainly ceramic membranes and metal membranes.

【Organic film】

The organic film is mainly made of a polymer material such as cellulose acetate, aromatic polyamide, polyether sulfone, polyvinylidene fluoride or the like. Depending on the shape of the film, it can be classified into a flat film, a tubular film, a capillary film, a hollow fiber membrane, or the like. The membranes for household water purifiers on the market are basically hollow fiber membranes.

【Inorganic film】

Among the inorganic membranes, ceramic ultrafiltration membranes are widely used in household water purifiers. The ceramic membrane has a long service life and is resistant to corrosion, but the water has a taste of the earth and affects the taste. At the same time, the ceramic membrane is easy to block and it is difficult to clean Hollow fiber ultrafiltration membrane is widely used in household water purification industry due to its large packing density, large effective membrane area, high pure water flux, easy operation and easy cleaning.

In the case where the water production per unit membrane area is constant, the larger the membrane area of the filter cartridge is, the more the total water production capacity of the filter element is.

[Hollow Fiber Ultrafiltration Membrane]

An ultrafiltration membrane consists of hundreds to thousands of fine hollow fiber filaments. The ultrafiltration membrane with a hollow fiber membrane inner diameter of 0.6-6 mm is generally called a capillary ultrafiltration membrane, and the capillary ultrafiltration membrane has an inner diameter. Larger, not easily blocked by large particulate matter.