【摘 要】
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Water-based lubrication is of great importance for both industrial applications and bio-medical systems that require friction and wear control. In this work, an aqueous lubrication concept is presente
【机 构】
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Laboratory for Advanced Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy
【出 处】
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第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
论文部分内容阅读
Water-based lubrication is of great importance for both industrial applications and bio-medical systems that require friction and wear control. In this work, an aqueous lubrication concept is presented based on surface-active polymers, graphene oxide, and oil in water (O/W) emulsion. Three different kinds of surface-active polymers with or without graphene oxide were coated on a CoCrMo alloy surface, characterized by using FTIR and XPS. A nanotribometer with ball-on-disk configuration was used to study the tribological performance of the coatings in aqueous media, including water, O/W base emulsion without additive, and O/W emulsion with additive. The results show that graphene oxide can enhance the friction reducing capability of the polymeric coatings. The tribological behavior of the PEG-lactide coating in emulsion is better than that of PEG coating, indicating the advantage of using hydrophilic and lipophilic group containing surface-active polymers for emulsion lubrication. The overall maximum reduction in friction that is achieved for a sliding contact of coated engineering surfaces from CoCrMo at low sliding velocity and moderate contact pressure is of about 63% compared to uncoated CoCrMo sliding in water at the same operational conditions.
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