Polybenzimidazolone membrane

Polybenzimidazolone membrane 21 developed by Teijin Ltd. had the following permeative characteristics Water permeation, 840 1/m2 - day salt rejection, 99.5% (1% NaCl aqueous solution, 80 kg/cm2)69). The membrane was less sensitive to plasticization with water than cellulose acetate and aromatic polyamide membranes... 

The company Teijin in Japan introduced a polybenzimidazolone membrane which was claimed to be on the market. 

After this first development of the CA membrane, different types of membranes followed CAB, CTA, PBIL, and PA membranes. CAB is membrane of cellulose acetate butyrate CTA is cellulose triacetate. The PBIL membrane is a polybenzimidazolone polymer and PA are polyamide membranes. The structure of a PBIL unit is as follows ... 

In recent years, RO membrane research has proceeded in two diredrions. First, there has been a continuing search for new polymeric membrane materials. Some of the materials with interesting properties that could be cited include other cellulose esters polybenzimidazolea polybenzimidazolone (PBIL), poly-imides and new aromatic polyamides... 

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