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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis, dispersion and tribological potential of alkyl functionalized graphene oxide for oil-based lubricant additives

2017년 8월 22일 14시 11분 05초
ANAL1.O-21 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 09시 : 56분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
jinyeong choe, yong jae kim, Chang-Seop LEE*
Department of Chemistry, Keimyung University, Korea
Graphene has been reported as an excellent lubricant additive for reducing adhesion and friction when coated on various surfaces as an atomically thin material with low surface energy. We have developed graphene oxide (GO) grafted with long alkyl chains to improve dispersion in oil-base lubricant as largely enhanced lipophilicity. Alkyl functionalized GO is synthesized by reacting NH2-GO with alkylchloride (n=4, 8, 14) in ethanol under reflux, then 0.02 wt% of alkyl functionalized GO (FGO 4, 8, 14) are added into the base oil (PAG 0W40) and ultrasonicated for dispersion. Chemical and structural properties of the synthesized alkyl functionalized graphene are investigated by Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM), Transmission electron microscopy (TEM), X-ray Diffraction (XRD) and Raman spectroscopy. The tribological tests are performed with High frequency friction/wear Tester. The van der Waals interaction between the tetradecyl chains grafted on GO and the alkyl chains of base oil provided long-term dispersion stability so that the C14-GO showed better dispersion than C4-GO, C8-GO. The C14-GO also decreased both friction and wear considerably under the rubbing contacts between ball and disk.