| 초록 |
As ion exchange membranes (IEMs) are utilized in various industrial fields, mechanical, thermal and chemical stabilities of membranes become more important. One of the most interesting materials to substitute organic membranes is porous alumina membranes (PAMs) owing to their unique material properties, such as high pore density, thermal stability and uniform pore size. It is well known that surface charge characteristics as well as pore morphology are key factors in IEM performance. Functionalization of pore wall with charged groups leads to improvements in IEM properties. In this study, amine groups were grafted on the pore surface by silane coupling reaction with hydroxyl groups of alumina surface, and further quaternized to yield positive charges. We have examined structural properties by scanning electron microscopy (SEM), and confirmed the surface functionalization by fourier transform-infrared (FT-IR) spectroscopy. IEM properties were investigated for the prepared alumina membranes using electrochemical techniques: zeta-potential, electric membrane resistance and transport number. |
