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  • 02월 26일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제115회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Influence of poly(vinyl alcohol) on pore structure of mesoporous SBA-15: Mesopore connectivity, surface area and micropore size distribution

2015년 2월 25일 22시 03분 58초
MAT.P-1166 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 15일 (수요일) 16:00~19:00
저자 및
한요셉*, 최시영1, 최준현, 김현중
전북대학교 자원·에너지공학과, Korea
1한국과학기술원(KAIST) 정보전자연구소, Korea
In 1998, Stucky`s group reported a new class of mesoporous materials synthesized at low pH and with non-ionic surfactant as templates. The hexagonally ordered materials of this class was called SBA-15 and displays mesopore structure similar to that MCM-41, however, SBA-15 shows larger cylindrical, hexagonal pore diameters and wall thicknesses and its mesopores are connected by micropores. In this study, effect of poly(vinyl alcohol) (PVA) in the synthesis on pore structure of mesoporous SBA-15 was investigated. It was found that, by addition of PVA, the surface area and porosity of SBA-15 is increased, while the structure and size the mesopores changed. Nitrogen adsorption-desorption measurements indicate that PVA introduces additional pores with pore sizes of around 2 nm into the mesopore wall. Thus, this may be due to the improved connectivity of mesopores by the reaction of hydrophilic PVA, which was added during synthesis, and triblock copolymer P123 with PEO chains and/or the presence of PVA itself. Accordingly, the mesoporous SBA-15 formed in the present study were confirmed to have improved the specific surface area and micropore volume through the PVA loading.