What's the "family" of the microporous membrane?

What's the "family" of the microporous membrane?

Microporous filter membrane is made of macromolecule chemical material and pore-forming additive applied on the support layer after special treatment. In the application of membrane separation technology, microporous filtration membrane is a kind of membrane with a wide range of applications. It has been widely used in many fields, such as scientific research, food detection, chemical engineering, nanotechnology, energy and environmental protection and so on.

Common classification of microporous filter membranes:

1. mixed cellulose ester membrane, also known as mixed fiber membrane (WX) membrane. Made from cellulose nitrate and cellulose acetate, suitable for aqueous solution, acid-resistant, alkali-resistant, organic solvents.

The main specifications of microporous filter membrane are as follows: diameter from 13 mm to 300 mm, pore diameter from 0.22 u to 5 u.

Used in pharmaceutical industry, electronics industry, food, machinery and other industries of bacteria and particulate filtration.

2. F membrane, also known as vinylidene fluoride membrane, made from polyvinylidene fluoride resin, is hydrophobic filter membrane, suitable for organic solvent and air filtration, diameter from 13 mm to 300 mm, pore diameter from 0.22 u to 1.2u.

It can be used to remove microparticles in organic solvent and improve the reagent level and so on.

3. Nylon (nylon) membrane, general-purpose, satisfied with pure water samples and water / organic mixed samples.

4. regenerated cellulose membrane, natural cellulose reformed after chemical treatment, its chemical nature is still cellulose (polysaccharide). This kind of membrane can withstand the high temperature of hot-pressing sterilization and can withstand the treatment of various organic solvents, but it can not be used in water medium. When a small amount of water-containing filter must be treated, in order to prevent over-expansion, the membrane should be put into the filter and be tightened by alcohol and then used, so as to reduce the deformation.

5. The physical, chemical stability and hydrophobicity of PVC membrane are not as good as that of PTFE membrane, which can withstand strong acid and alkali, but it is not resistant to high temperature, and its working temperature cannot exceed 65 ℃. Disinfection can only use alcohol, 2% / 3% formaldehyde, 0.1% thiomersal, etc.

And 6, the chemical property of the polytetrafluoroethylene membrane is extremely stable. Can be used for resisting strong acid, strong base, strong oxidizing agent, various corrosive liquid and various organic solvents, and the working temperature range is also large, and is-180-250 DEG C. In that strong hydrophobic film.