| 학회 | 한국재료학회 |
| 학술대회 | 2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 | 22권 1호 |
| 발표분야 | G. 나노/박막 재료 분과 |
| 제목 | Fabrication and Mechanical properties of GNP/Epoxy composite using different size of Graphene Nanoplatelet |
| 초록 | There are many journals related with advances in Graphene research in scientific and technical fields since Geim and Novoselov have successfully separated its two – dimensional form on a substrate. Also, number of researchers have been reported its superb properties caused from its two dimensional geometry. Properties of Graphene include the exceptionally high Young’s modulus (~1000 GPa), strength (~125 GPa), mobility of charge carriers (2 x 105 cm2 V-1 s-1), thermal conductivity (~5000 Wm-1 K-1), specific surface area (2630 m2 g-1) and high transparency (93% transmittance at a wavelength of 550 nm for monolayer Graphene). To develop Graphene based applications, the first requirement is how to produce enough amounts of high quality Graphene sheets. The fabrication process of synthesizing Graphene are grouped to 2 major method, i.e. Chemical vapor deposition and reduced Graphene oxide (rGO). First, Chemical vapor deposition (CVD) is another substrate based technique where Graphene is grown directly on a transition metal substrate via saturation of carbon upon exposure to a hydrocarbon gas at a high temperature. Second, reduced Graphene oxide uses Hummer’s method to oxidize Graphite to Graphene oxide flakes, which is able to make stable and homogeneous suspensions in aqueous or polar organic solvents. But, there is a major disadvantage in aforementioned techniques. This disadvantage is that these technique requires too much cost and time which means these are not proper for mass production. But Graphene nanoplatelet, which is fabricated from raw Graphite using intercalation and thermal expansion method is able to produce Graphene in scalable quality. In this research, GNPs were purified by size using salting out process with ((NH4)2SO4). By adding salts sequentially smaller GNPs were separated in proportion to salt concentration from 30μm to 1μm. After separation of GNPs, Graphene/Epoxy composites were fabricated from these GNPs by solvent mixing. Mechanical properties such as tensile properties, Young’s modulus and elongation percent of these composites were analyzed using Microforce testing machine. Our team wish that these results can provide useful property criteria of Graphene Nanoplatelets for industrial applications. |
| 저자 | 김준희, 차재민, 이준호, 홍순형 |
| 소속 | 한국과학기술원 |
| 키워드 | Graphene Nanoplatelet; Salting-out process; Graphene/Epoxy composite |
