Polyether-segmented nylon hemodialysis membranes. II. Morphologies and permeability characteristics of polyether-segmented nylon 610 membrane prepared by the phase inversion method

✍ Scribed by Akira Mochizuki; Yukio Seita; Fumiaki Endo; Toshiharu Nishi; Nobuko Saiga; Shuzo Yamashita

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 588 KB
• Volume: 65
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970829)65:9<1713::aid-app7>3.0.co;2-i

✦ Synopsis

The relationships between the morphologies and the permeability characteristics as dialysis membrane of polyether-segmented nylon 610 (PE-Ny610 ) have been investigated. PE-Ny610 used are poly (propylene oxide) (PPO) -segmented nylon 610 containing 25 wt % PPO (PPO-Ny610) and poly(ethylene oxide ) (PEO)-segmented nylon 610 containing 15 wt % PEO (PEO-Ny610 ). The morphologies in the cross section of the membranes exhibit the cellular porous structures due to liquid-liquid phase separation. On the other hand, the structures of the surfaces are mainly composed of the crystalline spherulite due to liquid-solid phase separation. These morphologies are little affected by the composition ratio of the coagulant, calcium chloride/methanol / water mixture. PEO-Ny610 membranes have shown superior membrane performances to the PPO-Ny610 membrane. The effect of PEO content in PEO-Ny610 on the adhesion of platelet onto the PEO-Ny610 film surface was investigated and it is concluded that PEO-Ny610 having ú 10 wt % PEO shows a good nonthrombogenicity equal to PPO-Ny610.