Cu 입자가 분산된 Al2O3 다공체의 제조 및 항균특성

Abstract

In order to fabricate the porous Al2O3 with dispersion of nano-sized Cu particles, freeze-drying of camphene/Al2O3 slurry and solution chemistry process using Cu-nitrate are introduced. Camphene slurries with 10 vol%Al2O3 was frozen at -25oC. Pores were generated by sublimation of the camphene during drying in air. The sinteredsamples at 1400 and 1500oC showed the same size of large pores which were aligned parallel to the sublimable vehiclesgrowth direction. However, the size of fine pores in the internal walls of large pores decreased with increase in sinteringtemperature. It was shown that Cu particles with the size of 100 nm were homogeneously dispersed on the surfaces ofthe large pores. Antibacterial test using fungus revealed that the porous Al2O3/1 vol% Cu composite showed antifungalproperty due to the dispersion of Cu particles. The results are suggested that the porous composites with required porecharacteristics and functional property can be fabricated by freeze-drying process and addition of functional nano particlesby chemical method.