Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : April 22, 2024 - April 23, 2024
Graphene oxide (GO) and reduced graphene oxide (rGO) produced from graphite by the Hammer's method are known to exhibit low friction when dispersed in water or oil, but the mechanism is not yet fully understood. So, in this study, friction tests were conducted using water dispersions containing eight different specifications of GO and rGO with different structures, functional group states, and secondary particle size. the bonding state of carbon by XPS analysis, and the secondary particle size by dynamic light scattering were measured to clarify the effects of these factors on the dispersibility of GO and rGO and on the friction coefficient. The results revealed a trend toward lower friction coefficients with smaller secondary particle size and with higher ratios of -C-O and -C-OOH bonds coordinating to GO and rGO.
