Abstract Water-lubricated bearings usually suffer severe abrasion under low-speed working conditions. Use of microencapsulated lubricants to modify the materials seems to be useful for reducing friction and wear in a bearing. In this reported study, palmityl palmitate microcapsules coated with a shell of urea-formaldehyde resin were prepared by in-situ polymerization and were then added to ultra-high molecular weight polyethylene (UHMWPE). Friction tests were performed using the microcapsule/UHMWPE composites by abrading them against tin-bronze discs under normal or heavy loads at low speeds. The experimental results showed that the addition of the microcapsules to the UHMWPE decreased its friction coefficient, reduced wear loss and optimized the wear surface morphology of the composites, consequently improving their tribological properties.

中文翻译：

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将微胶囊填充到 UHMWPE 基体中用于水润滑的新型复合材料的摩擦学性能研究

摘要 水润滑轴承在低速工况下磨损严重。使用微囊润滑剂来改性材料似乎有助于减少轴承中的摩擦和磨损。在这项报道的研究中，通过原位聚合制备了包裹有脲醛树脂外壳的棕榈酸棕榈酸酯微胶囊，然后将其添加到超高分子量聚乙烯 (UHMWPE) 中。使用微胶囊/UHMWPE 复合材料进行摩擦测试，方法是在正常负载或重载低速下将它们与锡青铜圆盘摩擦。实验结果表明，在超高分子量聚乙烯中加入微胶囊降低了其摩擦系数，减少了磨损损失，优化了复合材料的磨损表面形貌，从而提高了其摩擦学性能。