Cao Xianwu, Li Yuping, He Guangjian
National Engineering Research Center of Novel Equipment for Polymer Processing, Key Laboratory of Polymer Processing Engineering (SCUT), Ministry of Education, Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing, South China University of Technology, Guangzhou 510641, China.
Polymers (Basel). 2020 Jun 12;12(6):1335. doi: 10.3390/polym12061335.
Porous ultra-high-molecular-weight polyethylene (UHMWPE) self-lubricating materials were designed and fabricated by a rotary sintering method, and the microstructure and properties were evaluated. Results showed that the rotary molding could not only significantly improve the molding efficiency but also formed uniform internal microstructures with high porosity, excellent mechanical properties, and low friction coefficient. Under oil lubricating conditions, the friction curve of samples quickly reached a steady state, the friction coefficient was reduced by 50%, and the repeat utilization was up to 99%. The following optimum sintering conditions were shown: Sintering temperature of 180 °C or 190 °C, sintering time determined as 10 min, and loading capacity of between 3.6 g and 3.8 g. Therefore, it is expected that this work will open a convenient and compatible strategy for fabricating porous materials with good self-lubricating performance.
采用旋转烧结法设计制备了多孔超高分子量聚乙烯（UHMWPE）自润滑材料，并对其微观结构和性能进行了评估。结果表明，旋转成型不仅能显著提高成型效率，还能形成具有高孔隙率、优异机械性能和低摩擦系数的均匀内部微观结构。在油润滑条件下，样品的摩擦曲线迅速达到稳定状态，摩擦系数降低了50%，重复利用率高达99%。给出了以下最佳烧结条件：烧结温度为180℃或190℃，烧结时间确定为10分钟，装载量在3.6克至3.8克之间。因此，预计这项工作将为制备具有良好自润滑性能的多孔材料开辟一种便捷且兼容的策略。
