Abstract
AbstractNitrile butadiene rubber is widely used in water‐lubricated bearings due to its excellent performance. Generally, the friction coefficient of water‐lubricated rubber bearings typically between 0.05 and 0.18. In this study, a new method for preparing nitrile butadiene rubber with micro‐holes surface is developed by porous leaching with salt as pore forming agent. The possibility of using porous surface to minimize friction and wear of rubber materials is researched. The influence of structural parameters, including the hole density and size (which are determined by salt mass fraction of rubber compounds and salt grain‐sized, respectively) on tribology performances are also evaluated. In a ring‐on‐block test, the optimal parameters of modified rubber achieved a low friction coefficient of 0.008, which reduced by 42% compared with untreated one (0.019) under the same operating condition. It can be expected that the developed method is beneficial to reduce the friction coefficient of rubber‐steel friction pair under water lubricated condition.
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