Frictional properties of novel lubricants for magnetic thin film media

In order to achieve the required contact-start-stop (CSS) durability in a rigid-disk system, the authors investigated the relationship between CSS durability and lubricant structure in terms of polar group. The strong adhesion of the lubricant onto the disk surface gives rise to a large adsorption heat and shows the ability to withstand numerous CSS operations. CSS durability is also ascribed to the conformal film formation of the lubricant, which is prepared by the spontaneous adsorption method on the disk surface. Based on these findings, the authors designed and synthesized lubricants which exhibit improved performance compared to conventional perfluoropolyethers