| 초록 |
Colloidal silvers have gained many interests owing to its powerful anti-microbial performance. However, the colloidal silver has a fatal defect in that it is easily deformed in aqueous media. Therefore, a number of different methods have been proposed to prepare a stable silver system, such as chemical reduction, electrolysis, and chemical deposition. To the best our knowledge, actually, a colloidal silver system that is stable in aqueous media while showing an anti-microbial performance has not been reported in the literature. In this study, a novel anti-bacterial colloidal silver system is present in which nano-sized colloidal silvers are impregnated uniformly in the surface-functional (-CN) macroporous polymer microparticles (>150m2/g) by in-situ chemical reduction/deposition method. In the macroscopic analysis, it was found that the silver having a face center cubic phase (111, 200, 220) distributed evenly inner and outer surfaces. In the preservation test, the microparticles showed a powerful anti-bacterial performance. In the present contribution, the anti-bacterial mechanism of polymer/silver microparticles was tried to construct by considering the successive oxidation/reduction reaction of silver in aqueous media. |
