| 摘要 |
PURPOSE:To improve the performance of the title membrane by coating the hyperthin membrane of the cross-linked aromatic polyamide obtained by the interfacial polycondensation of the raw material consisting of specified aromatic amine and an aromatic acid chloride on a microporous supporting membrane, and heating the membrane with hot water. CONSTITUTION:An aromatic amine such as m-phenylenediamine and 1,3,5- triaminobenzene having an amino group of >=2.05 mesh functionality and an aromatic acid chloride such as trimesic acid chloride and tetraphthalic acid chloride are used as the raw material. The raw material is interfacially polycondensed, and the obtained cross-linked polyamide is coated on a microporous supporting membrane of fiber-reinforced polysulfone, etc., to form a hyperthin membrane thereon. The obtained composite membrane is treated with the hot water at pH5.5-8.5 and at 50-100 deg.C. When the obtained semipermeable membrane is used, the amt. of generated water does not decrease with time. |
