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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Size fractionation of Graphene Oxide by Asymmetrical Flow Field-Flow Fractionation

2019년 8월 22일 12시 49분 47초
ANAL1.O-19 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 09시 : 54분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
Myoungjae Ko, Myeong Hee Moon*
Department of Chemistry, Yonsei University, Korea
Graphene is known to have surprising properties including electrical, thermal and mechanical properties. However, graphene still has many problems with applications on the market, because of low solution dispersibility and poor processability. To solve these problems, graphene oxide liquid crystal (GOLC) was discovered. In contrast to graphene, GOLC is a two-dimensional graphene-based material that has a good processability at large scales and is well dispersed due to the liquid crystal characteristics, therefore, it is expected to be utilized for the various applications. However, GO has a wide size distribution due to various factors in the synthesis step. GO size distribution needs to be controlled because it relates to the liquid crystal characteristics of GO. Many studies have been conducted to solve the problem of wide size distribution of graphene oxide, but it has not been solved effectively yet. These studies pose problems with size separations that modify graphene oxide. This study was aimed to find an optimal condition for the size-based separation of GO using asymmetrical flow-field fractionation (AF4). For the confirmation of size separation, fractions GO were collected and analyzed using scanning electron microscopy (SEM) and optical microscopy (OM). As a result, GO in plate form can beseparated by hyperlayer separation mode of AF4 with the recovery of GO within 70% to 90%.