| 초록 |
Single- and double-layered polymer composites, consisting of cerium activated yttrium silicate (CAYS) and polysulfone (PSf), were prepared via the phase inversion process. The correlation between the morphology and radioactive detection capacity of the prepared composites was investigated. In a double-layered structure, the supporting, bottom layer was formulated in advance by evaporating the solvent from a PSf and methylene chloride binary solution. The top layer was prepared by casting a dimethylformamide and PSf solution over the support layer and by coagulating the film with nonsolvent water or methanol. The prepared composites showed two distinct layers: the bottom the dense, the top the highly porous. As measured by a photomultiplier tube, the membranes’ radioactivity detection data showed that the polymer films prepared by the water coagulation were more efficient than the films prepared by the methanol coagulation. And, the double-layered composites revealed better detection capacity than the single-layered composites because of the macropore suppression effect and the greater stability in the top layer due to the dense, backing polymer structure. |
