Aromatic heterocycles and ionic polymer membrane materials

(3) Aromatic heterocycles

① Polybenzozazoles, such as the PBI film developed by Celanese Company in the United States, are of this type

② The representative of this type of polybenzimidazolone film is the PBLL film produced by Japan's Teijin Company.

This membrane has a separation rate of 90% to 95% for 0.

③ Membrane materials such as polypyrazinamide can be prepared by interfacial polycondensation.

④ Polyimide Polyimide has good thermal stability and resistance to organic solvent power therefore preferred class of membrane material

Among them, Ar is an aryl group, and the order of easy to difficult gas separation is as follows: H ₂ O, H(He), H ₂ S, CO ₂ , O ₂ , Ar(CO), N ₂ (CH ₄ ), C ₂ H ₆ , C ₃ H ₈

(4) Ionic polymer

Ionic polymers can be used to prepare ion exchange membranes

(5) Vinyl polymer

Vinyl polymers used as film materials include polyvinyl alcohol , polyvinylpyrrolidone, polyacrylic acid , polyacrylonitrile, polyvinylidene chloride, polyacrylamide, and the like

Related links: Polysulfone and polyamide non-cellulose ester membrane materials