A flexible free-standing ultrathin or thin protein membrane, its fabrication method and application

摘要

[Purpose] A purpose of this invention is to provide a robust and flexible free-standing ultrathin(nano) or thin pure protein membrane which enables a rapid and simple separation(or condensation) of relatively small(M.W.=ca.1,000 Da) molecules.;[Summary] A porous free-standing protein membrane formed by cross-liked protein of this invention can be fabricated by a method comprising following steps:(1) a first step of mixing nanostructured materials and protein to obtain composite made of protein and nanostructured materials (for example metal hydroxide nanostrands) ;(2) a second step of forming a membranous body formed by said composite made of protein and nanostructured materials, and mutually cross-linking said protein by means of a cross-linker; and(3) a third step of dissolving and removing said nanostructured materials to produce a porous membrane.