| 摘要 |
PURPOSE:To obtain a permselective composite membrane having high chlorine resistance by crosslinking polyallylamine with a compd. having >=2 functional groups capable of reacting with prim. amino group on a supporting film. CONSTITUTION:A soln. obtd. by dissolving polyallylamine in water, hydrophilic solvent or a mixture thereof is coated on a porous supporting film or impregnated into the film. After removing excess soln. if necessary, by flowing down, obtd. composite body is allowed to contact with a compd. having at least two functional groups capable of reacting with prim. amino group, heating thereafter, if necessary, to perform crosslinking reaction. Suitable hydrophilic solvent is methanol, and suitable concn. of the film forming liquid is 0.05-10wt%. The crosslinking reaction is performed with 0.05-10wt% concn. of the crosslinking agent and 10sec-10min contact time, then heating at room temp. -90 deg.C, further heating at 100-130 deg.C for 2-30min. |
