In this research, a kind of amphiphilic compound: 2-hydroxymethyl-[1,4,7,10,13-pentaoxa benzo cyclo pentadecane]-3,4,5-tris[4-(10-dodecyl-1-oxo)benzyloxy]benzoate was synthesized by methyl p-hydroxybenzoate, 4-carbonate benzo-15-crown-5 and other reagents. The chemical composition and structure were characterized by FT-IR, ¹H NMR, MS, DSC and POM. Then, the ion channel membrane was obtained from grafting this new kind of crown ether compound to the surface of polycarbonate track-etched membrane by the method of ultraviolet (UV) light grafting. The grafting volume is: 606 μg/cm². The ion channel membrane was characterized by the method of ATR, SEM and AFM. The results confirmed that the compound had successfully grafted onto the surface of the polycarbonate track-etched membrane, and formed a dense layer by the self-assembly columnar structures. At last, the ion channel function of the membrane was determined by self-designed membrane transport instrument. The ion transport rate: P_FM＝20.62×10^－6cm/s. The separation factor of ion channel membrane and controlled membrane: α_FM/NFM＝5.96. These data confirmed that the ion channel membrane can selectively recognize and transport Na^＋. It is a new type of Na^＋ recognized ion channel membrane.

Key words: amphiphilic molecule, self-assembly, ion channel membrane, crown ether, Na^＋ recognized