Thermoplastic polyurethane (TPU) is one of the most popular marine bearing materials because of its excellent characteristics. However, severe wear often occurs under some extreme conditions. In order to improve the service life of bearing material, this work introduced the polyacrylonitrile (PAN) fiber as a reinforcement material to further enhance TPU tribological properties. Considering that the bearing material does not process self‐lubricating or cannot form a stable water film under some working conditions, the PAN fiber was hydrophilically modified to alleviate this problem. The effects of fiber addition, operation speed, and applied load on the tribological properties of the composites were examined by using a tribo‐tester. The friction coefficient of the samples, the surface morphology after rubbing, and the wear loss, and so on, were also comprehensively analyzed. It was found that the friction coefficient of 30% modified PAN fiber at 500 r/min and 0.8 MPa load was 0.08, and its friction coefficient was 81.8% lower than the pure sample under the same working condition, this is mainly due to the high hydrophilicity of the modified PAN fiber, which makes it easier to form a water film between the composite material and the copper disc. Furthermore, adhesive wear occurred in unmodified samples, while modified samples contained abrasive wear. This new material modification method and design idea can be used for improving the performance of water‐lubricated bearing materials.

中文翻译：

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开发用于改善水润滑滑动轴承中热塑性聚氨酯材料摩擦性能的改性聚丙烯腈纤维

热塑性聚氨酯（TPU）由于其优异的特性而成为最受欢迎的船用轴承材料之一。但是，在某些极端条件下经常会发生严重磨损。为了提高轴承材料的使用寿命，这项工作引入了聚丙烯腈（PAN）纤维作为增强材料，以进一步增强TPU的摩擦学性能。考虑到轴承材料在某些工作条件下不能进行自润滑或不能形成稳定的水膜，因此对PAN纤维进行了亲水改性，以缓解这一问题。使用摩擦测试仪检查了纤维添加量，操作速度和施加的载荷对复合材料摩擦学性能的影响。样品的摩擦系数，摩擦后的表面形态以及磨损量等，还进行了全面分析。发现在相同的工作条件下，30％改性PAN纤维在500 r / min和0.8 MPa载荷下的摩擦系数为0.08，其摩擦系数比纯样品低81.8％。改性PAN纤维的亲水性，使其更容易在复合材料和铜盘之间形成水膜。此外，在未改性的样品中发生了粘合剂磨损，而改性的样品则具有磨料磨损。这种新的材料改性方法和设计思想可用于改善水润滑轴承材料的性能。在相同工作条件下比纯样品低8％，这主要是由于改性PAN纤维的高亲水性，这使得在复合材料和铜盘之间更容易形成水膜。此外，在未改性的样品中发生了粘合剂磨损，而改性的样品则具有磨料磨损。这种新的材料改性方法和设计思想可用于改善水润滑轴承材料的性能。在相同工作条件下比纯样品低8％，这主要是由于改性PAN纤维的高亲水性，这使得在复合材料和铜盘之间更容易形成水膜。此外，在未改性的样品中发生了粘合剂磨损，而改性的样品则具有磨料磨损。这种新的材料改性方法和设计思想可用于改善水润滑轴承材料的性能。