The diluent significantly influences the structure and properties of the oxygenated membrane prepared via thermally induced phase separation (TIPS). With the increasing concern of damage to human body and environment from diluents, non-toxic and environmental-friendly diluents are gradually gaining more attention. In this study, green binary diluents acetyl trioctyl citrate (ATOC) and acetyl tributyl citrate (ATBC) are used to prepare poly-4-methyl-1-pentene (PMP) flat sheet membranes and hollow fiber membranes (HFMs) via TIPS. Firstly, the effects of ATOC/ATBC mass ratio on the morphology, gas permeability, mechanical properties, and crystallization behaviors of flat sheet membranes are investigated. When the ATOC/ATBC mass ratio is 6/4, the membrane has high gas permeability and mechanical properties. Furthermore, the optimal polymer-diluent composition is applied to the preparation of HFMs. The effects of spinning parameters (flow rate of core liquid, and spinning speed) on morphology, gas permeability, and blood oxygenation performance of PMP HFMs are studied. Under optimized preparation conditions, the PMP HFM exhibits high gas permeability (the permeability of O₂ is 39.4 ± 2.1 mL min⁻¹ cm⁻² bar⁻¹ and the permeability of CO₂ is 42.3 ± 2.3 mL min⁻¹ cm⁻² bar⁻¹), which is higher than the results reported in previous research. The PMP HFM also shows excellent blood oxygenation performance. This study may contribute to the green preparation of PMP oxygenated membranes for artificial membrane lungs.

稀释剂显着影响热致相分离（TIPS）制备的氧化膜的结构和性能。随着人们越来越关注稀释剂对人体和环境的危害，无毒、环保的稀释剂逐渐受到人们的关注。在本研究中，使用绿色二元稀释剂乙酰柠檬酸三辛酯（ATOC）和乙酰柠檬酸三丁酯（ATBC）通过TIPS制备聚4-甲基-1-戊烯（PMP）平板膜和中空纤维膜（HFM）。首先，ATOC/ATBC质量比对形貌、透气性、研究了平板膜的机械性能和结晶行为。当ATOC/ATBC质量比为6/4时，膜具有较高的透气性和机械性能。此外，最佳的聚合物稀释剂组合物应用于 HFM 的制备。研究了纺丝参数（芯液流量和纺丝速度）对PMP HFMs的形貌、透气性和血液氧合性能的影响。_{在优化的制备条件下，PMP HFM表现出高透气性（O 2}的渗透性为39.4 ± 2.1 mL min ^-1 cm ^-2 bar ^{-1 ，CO} ₂的渗透性为42.3 ± 2.3 mL min ^-1 cm ^-2 bar⁻¹ )，高于先前研究报告的结果。PMP HFM 还表现出出色的血氧性能。该研究可能有助于人工膜肺PMP含氧膜的绿色制备。