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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Various Edge-functionalized graphite via simple and eco-friendly methods

등록일
2012년 2월 22일 19시 48분 26초
접수번호
1367
발표코드
MAT.P-1184 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
전인엽, 백종범1
울산과학기술대학교 친환경에너지공학부, Korea
1울산과학기술대학교 에너지공학부, Korea
Graphene, a single layer of carbon atom bonded together in a hexagonal lattice, has attracted tremendous attention because of its remarkable electronic, optical and physical properties. Thus, graphene is considered having potential applications such as display, transparent electrode, transistor, etc. Various methods such as drawing method, epitaxial growth method, reduced graphite oxide (rGO), chemical vapor deposition (CVD) are reported to prepare graphene. We reported a new approach that graphite was exfoliated by grafting various organic molecular wedges to the defect sites located mainly on the edges of graphite via Friedel-Crafts acylation reaction in poly(phosphoric acid) /phosphorous pentoxide medium. This is the first attempt to large-scale “direct” chemical exfoliation of graphite without harsh conditions that are known to damage carbon framework. We also developed a simple and eco-friendly (CO2-capturing) ball milling process to efficiently produce edge-carboxylated graphite (EFG) in solid state without involving hazardous chemicals. The resultant ECG was demonstrated to be highly dispersible in various polar solvents suitable for solution casting. The resultant exhibited many superior structure-property characteristics with respect to its GO and H-GO counterparts. In result, the organic molecular wedges and ball milling technique developed in this study could be regarded as a general approach toward low-cost, high-yield production of edge-functionalized graphene (EFG) with various functional groups of practical significance for mass production of multifunctional materials and devices based on graphene.

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