Abstract Porous oil-containing polyimide (PI)/hollow mesoporous silica nanospheres (HMSNs) composite films of PI/HMSNs were fabricated by infusing liquid paraffin into the pores under vacuum. The microstructure, oil storage capability and tribological behaviors of porous oil-containing PI/HMSNs composite films were evaluated using the porous oil-containing PI film as comparisons. As a result, the addition of HMSNs could greatly improve the oil content and oil retention, realizing the intended goals that the prepared oil-containing composites could effectively reduce the friction coefficient and extend the wear life. Besides, liquid paraffin in the porous PI/HMSNs composite films released stably under the actions of the applied load and the friction heat, which can be used in high temperature and load conditions.

中文翻译：

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多孔含油聚酰亚胺/中空介孔二氧化硅纳米球复合薄膜的制备及摩擦学行为

摘要 通过在真空下将液体石蜡注入孔隙中，制备了多孔含油聚酰亚胺（PI）/中空介孔二氧化硅纳米球（HMSNs）复合薄膜。以多孔含油 PI 薄膜作为对比，评估了多孔含油 PI/HMSNs 复合薄膜的微观结构、储油能力和摩擦学行为。因此，HMSNs的加入可以大大提高含油量和保油性，实现了制备的含油复合材料能够有效降低摩擦系数和延长磨损寿命的预期目标。此外，多孔PI/HMSNs复合薄膜中的液体石蜡在外加载荷和摩擦热的作用下稳定释放，可在高温和载荷条件下使用。