Patent ID: 9211507
Filing Date: 2015-12-15
Classification: B01D

Abstract:
1. A method of manufacturing a water-treatment separating membrane, the method comprising: forming an aqueous amine solution layer on a porous support; and forming a polyamide active layer by dropping a droplet of an organic solution comprising an acyl halide compound on the aqueous amine solution layer, wherein a volume of the organic solution per droplet is from 0.001 ml to 5 ml, wherein at least one curve pattern formed by connecting two or more arcs in at least a partial area of the polyamide active layer is revealed when the polyamide active layer is dyed using a 0.5% aqueous solution of Rhodamine B for showing the curve pattern, and wherein an arithmetic mean roughness (Ra) of a surface of the polyamide active layer is from 60 nm to 100 nm.