Effects of Contact Surface Pressure and Surface Roughness on Friction Properties of Various LB Films with the Same Tip Group

Abstract

Organic Friction Modifier additives are widely used to reduce friction and wear on sliding surface. In this study, we investigated the effect of different sliding conditions, such as surface roughness, surface pressure, and medium, on the friction reduction effect of adsorption films with different surface coverage, and examined the factors that affect the frictional properties of adsorption films. To investigate the effect of the different packing densities on the frictional properties of the adsorption films, we firstly prepared adsorption films with the same tip group but different packing densities by the LB method, and confirmed the validity of the preparation of the LB films by neutron reflectometry. The friction properties of the adsorption films were measured under the different surface roughness and pressure using atomic force microscopy. The results suggest that there is an optimum packing density for surface pressure and surface roughness.