Tribological characteristics of ultra-high molecular weight polyethylene (UHMWPE) composites with 10% short carbon fibres (SCF) lubricated in water with polyvinylpyrrolidone (PVP) as a modifier were investigated. The aqueous solutions with varying concentrations of PVP were prepared, and their viscosity-enhancing action, friction-reducing properties and anti-wear performances were studied under different loading conditions equivalent to 10 and 20 MPa of contact pressures at a constant sliding speed of 20 mm/s. The results showed that PVP is an excellent viscosity modifier for water. PVP-modified water exhibited excellent performance compared to distilled water, reducing the wear and friction coefficient of neat UHMWPE up to 25%. The anti-wear properties of UHMWPE-SCF composite were also improved with PVP modified water lubrication, yielding a maximum reduction of wear up to 45%. PVP seems to be a promising additive of modifying the lubricating properties of distilled water for water-based lubrication.

中文翻译：

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聚乙烯吡咯烷酮改性水润滑超高分子量聚乙烯复合材料的摩擦学行为

研究了以聚乙烯吡咯烷酮 (PVP) 作为改性剂的 10% 短碳纤维 (SCF) 的超高分子量聚乙烯 (UHMWPE) 复合材料的摩擦学特性。制备了不同浓度PVP的水溶液，在20 mm恒定滑动速度下，在相当于10和20 MPa接触压力的不同载荷条件下，研究了它们的增粘作用、减摩性能和抗磨性能。 /秒。结果表明，PVP 是一种优良的水粘度调节剂。与蒸馏水相比，PVP 改性水表现出优异的性能，可将纯 UHMWPE 的磨损和摩擦系数降低多达 25%。UHMWPE-SCF复合材料的抗磨性能也通过PVP改性水润滑得到改善，最大程度减少磨损达 45%。PVP 似乎是一种很有前途的添加剂，可以改善水基润滑中蒸馏水的润滑性能。