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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis, dispersion and tribological performance of alkyl functionalized graphene oxide and graphene-WS2 Composites as an oil lubricant additive

2019년 2월 11일 15시 03분 19초
ANAL2.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 09시 : 20분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists II
저자 및
Jong Seok Han, Jin-Yeong Choi, Chang-Seop Lee*
Department of Chemistry, Keimyung University, Korea
Graphene and WS2 has been reported as an excellent lubricant additive for reducing adhesion and friction, when coated on the various surfaces as an atomically thin material with low surface energy. GO is Various methods have been proposed to enhance the physical properties of GO by its reduction, because it is difficult to apply GO to hydrophobic lubricant due to the large numbers of oxygen functional groups and the remarkably poor physical properties. To solve this problem First, We have painted a long alkyl chain of graphene oxide (GO) to improve the dispersion of oil-based lubricants with greatly enhanced lipophilicity. Second, a gelator is used for dispersion and a graphene-WS2 composite is synthesized to improve lubrication performance. Alkyl functionalized GO is synthesized by reacting NH2-GO with hexyl chloride, dodecyl chloride, hexadecyl chloride in ethanol under reflux, then 1.0x10-3 wt% of alkyl functionalized GO are added into the base oil (PAO oil) and oil containing WS2 and also ultrasonicated for dispersion. Graphene-WS2 composites were synthesized by hydrothermal synthesis, Graphene-WS2 composites were added to the PAO oil with 1 wt% of the gelator. Chemical and structural properties of the synthesized alkyl functionalized graphene and Graphene-WS2 composites are investigated by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and Scanning electron microscope (SEM). The tribological tests are performed with a tribometer via ball-on-disk test mode.