Nanoporous membrane

Abstract

A nanoporous membrane according to the present invention includes a support member and a polymer layer disposed on the support member and including a plurality of nano pores each having an inner wall formed of a block-structured polymer material of which the end thereof is substituted by a functional group.

What is claimed is: 
     
         1 . A nanoporous membrane comprising
 a support member, and   a polymer layer disposed on the support member and including a plurality of nano pores each having an inner wall formed of a block-structured polymer material of which the end thereof is substituted by a functional group.   
     
     
         2 . The nanoporous membrane of  claim 1 , wherein the functional group is at least one of —COOH, —NH 2 , and —SH. 
     
     
         3 . The nanoporous membrane of  claim 2 , wherein the block-structured polymer material is a PMMA block. 
     
     
         4 . The nanoporous membrane of  claim 3 , wherein the polymer layer comprises
 a lower layer formed of a PS block, and   an upper layer disposed in the lower layer and formed of the PMMA block.   
     
     
         5 . The nanoporous membrane of  claim 1 , wherein the thickness of the polymer layer is 50 nm to 100 nm. 
     
     
         6 . The nanoporous membrane of  claim 1 , wherein the nano pores of the polymer are distributed with density of 10 11  nano pores/cm2.