A method for preparing membrane having nano-sized pore for water treatment and membrane prepared using same

摘要

The present invention provides a method of producing a porous polymer film, comprising: immersing a porous polymer film supporting layer having a first pore in a first polymer containing solution; Immersing the support layer in a non-solvent to solidify the first polymer to form a first polymer layer that fills voids present on a surface or a cross section of the support layer to hydrophilize the support layer; And preparing a membrane having a second nano-sized pore smaller than the first pore by providing a second polymer layer by pressing the supporting layer having the first polymer layer formed thereon by dipping it in a second polymer-containing solution, Wherein the support layer is hydrophobic and the first and second polymer layers are hydrophilic, and a nanocomposite membrane for water treatment prepared thereby. According to the present invention, it is possible to provide a membrane in which the impurity separation ability is greatly improved by hydrophilizing the hydrophobic support layer.