为了减小废弃油水对环境的危害，将聚乳酸-还原氧化石墨烯（PLA/rGO）与羟基封端聚二甲基硅氧烷（HTPDMS）以不同比例共混，通过静电纺丝技术制备了一系列PLA/rGO/HTPDMS复合纤维膜，结合扫描电子显微镜、红外光谱仪和接触角仪等对纤维膜的微观形貌、表面成分和疏水性进行表征。结果表明：PLA/rGO与HTPDMS共混后，所制得的纤维膜均以纳米尺度纤维构成，且膜中存在HTPDMS成分。HTPDMS的加入使PLA/rGO膜疏水性得到大幅提升。油-水混合物的分离具有较高油通量，通量均高于18 400 L/（m²·h），分离效率大于98.2%。经过10次循环分离后纤维膜分离效率仍可达到97%以上，具有良好循环稳定性。PLA/rGO/HTPDMS纤维膜在含油废水处理方面具有广阔的应用前景。

In order to reduce the environmental hazard of waste oil water, the composite nanofibrous membranes were fabricated by electrospinning technique. The membranes were prepared by blending poly(lactic acid)/reduced graphene oxide (PLA/rGO) and hydroxyl-capped polydimethylsiloxane (HTPDMS) in varying ratios. The nanofibrous membranes were subjected to characterization by a scanning electron microscopy, an infrared spectroscopy, and a contact angle instrument to assess their micro-morphology, surface composition, and hydrophobicity. The results show that the addition of HTPDMS into PLA/rGO results in the formation of membranes consisting of nano-scaled fibres with HTPDMS. The hydrophobicity of PLA/rGO membrane is greatly improved by the addition of HTPDMS. The separation of oil-water mixtures has high oil fluxes, the fluxes are higher than 18 400 L/(m²·h), and the separation efficiency is greater than 98.2%. After 10 cycles of separation, the separation efficiency of fiber membrane can still reach more than 97%, with good cycle stability. PLA/rGO/HTPDMS fiber membrane has a broad application prospect in oily wastewater treatment.