Femtosecond (fs) laser micromachining on polymeric materials is a single-step, and contactless manufacturing technology. Knowing the potential of poly(ionic liquid)s (PILs) and their derived composite materials incorporating ionic liquids (PIL–IL) to design membranes with improved CO₂ separation, we here explore for the first time the creation of microchannels on the surface of PIL–IL materials by laser ablation using femtosecond laser radiation. PIL–IL membranes composed of pyrrolidinium-based PILs containing the [NTf₂]^– and [C(CN)₃]^– anions and different amounts of their corresponding ILs (40 and 60 wt%) were prepared and micromachined using fs laser pulses varying the pulse repetition rate, scanning speed, and pulse energy. The morphology of the fs laser modified PIL–IL samples was investigated through scanning electron microscopy (SEM), while the influence of the fs laser processing on the membranes structure was analyzed by solid-state nuclear magnetic resonance (ssNMR), Fourier-transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The CO₂/N₂ and CO₂/H₂ separation performances of the irradiated membranes were also evaluated and compared to those of the non-irradiated.

Depending on the parameters used, fs laser processing was successful in modifying the surface of PIL–IL membranes through the formation of microchannels around 55–60 μm deep. Significant improvements in CO₂, N₂ and H₂ permeabilities were achieved for the irradiated PIL–IL membranes, maintaining their CO₂/N₂ and CO₂/H₂ permselectivities.

聚合物材料上的飞秒 (fs) 激光微加工是一种单步、非接触式制造技术。了解了聚（离子液体）（PIL）及其衍生的包含离子液体（PIL-IL）的复合材料在设计具有改进的 CO ₂分离的膜方面的潜力，我们在这里首次探索了在膜表面形成微通道通过使用飞秒激光辐射进行激光烧蚀的 PIL-IL 材料。PIL-IL 膜由含有 [NTf ₂ ] ^–和 [C(CN) ₃ ] ^–的基于吡咯烷的 PIL 组成使用改变脉冲重复率、扫描速度和脉冲能量的 fs 激光脉冲制备和微加工阴离子和不同数量的相应 IL（40 和 60 wt%）。通过扫描电子显微镜 (SEM) 研究 fs 激光修饰的 PIL-IL 样品的形貌，同时通过固态核磁共振 (ssNMR)、傅里叶变换红外分析 fs 激光加工对膜结构的影响(FT-IR) 光谱和 X 射线光电子能谱 (XPS)。还评价了辐照膜的CO ₂ /N ₂和CO ₂ /H ₂分离性能，并与未辐照膜的那些进行了比较。

根据所使用的参数，fs 激光加工通过形成约 55-60 μm 深的微通道成功地修饰了 PIL-IL 膜的表面。辐照后的 PIL-IL 膜在 CO ₂、N ₂和 H ₂渗透率方面取得了显着改善，同时保持了它们的 CO ₂ /N ₂和 CO ₂ /H ₂渗透选择性。