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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Large-Scale Synthesis of Ag Nanoparticle-Silica Hybrid Composites and Their Application for Antibacterial Agents on Air Filtration

등록일
2014년 8월 29일 13시 35분 42초
접수번호
1383
발표코드
MAT.P-1163 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
고영선, 우경자1,*
한국과학기술연구원(KIST) 분자인식연구센터, Korea
1한국과학기술연구원(KIST) 나노재료연구센터, Korea
Ag nanoparticle-silica (AgNP@SiO2) hybrid composites were synthesized on a large scale and were used as a coating material for an air filtration system exhibiting synergistic antibacterial activity. The AgNP@SiO2 composites were obtained via the seed-mediated growth method. Monodispersed silica spheres (~400 nm in diameter) prepared by the Stober process were used as a substrate material for decorating AgNPs. The silica spheres were functionalized with aminopropyl groups to bind Ag seeds on the silica surface, which were grown up to ~30 nm in size. The AgNP@SiO2 composites were coated on filter samples and tested for the antimicrobial activity on bacteria. The target bacteria are gram-negative bacteria, Escherichia coli, and gram-positive bacteria, Staphylococcus epidermidis. The electron microscopic analysis revealed that those bacteria were trapped by the AgNP@SiO2 on filter fibers, eventually leading to death of bacteria. The antibacterial activities of the coated air filter samples were also evaluated quantitatively using the colony count method. The filter sample showed 99.99% antibacterial efficacies for both bacteria in bacterial solution. In these regards, the antibacterial effect of AgNP@SiO2-coated air filters provides a future direction for their practical utilization in green environment applications.

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