The membrane contactor has been considered an effective device to capture CO₂, but its performance is limited by membrane wetting phenomena. In this work, the ZIF-8/ZIF-L (zeolitic imidazolate framework) based composite membrane with excellent hydrophobic stability and CO₂ permeability was successfully fabricated by coating the dense layer on the porous PVDF (polyvinylidene fluoride) substrate. The dense layer was developed by evenly incorporating ZIF-8 nanocrystals and ZIF-L nanosheets into the polydimethylsiloxane (PDMS) polymer. The as-prepared membrane possessed competitive hydrophobicity with a water contact angle (WCA) of 131.8°. And after a ten-day immersion test in CO₂ absorbent, the WCA only declined by 9.8%, exhibiting excellent hydrophobic stability. Besides, the CO₂ permeability of the composite membrane was 61.8×10⁻⁸·mol·m⁻²·s⁻¹·Pa⁻¹ with an ideal CO₂/N₂ separation factor of ∼20, which was effectively improved in comparison with the control membrane. In the CO₂ absorption experiment, the prepared membrane achieved the competitive CO₂ flux of 3.02×10⁻³·mol·m⁻²·s⁻¹ when the liquid velocity was 0.25 m·s⁻¹ and displayed robust long-term operating stability. Finally, the AC impedance technique was applied to continuously monitor the wetting state of composite membranes, which further investigated their anti-wetting ability.

膜接触器已经被认为是捕获CO ₂的有效装置，但是其性能受到膜润湿现象的限制。在这项工作中，通过将致密层涂覆在多孔PVDF（聚偏二氟乙烯）基底上，成功制备了具有优异的疏水稳定性和CO ₂渗透性的ZIF-8 / ZIF-L（沸石咪唑酸酯骨架）基复合膜。通过将ZIF-8纳米晶体和ZIF-L纳米片均匀掺入聚二甲基硅氧烷（PDMS）聚合物中来形成致密层。所制备的膜具有竞争性疏水性，水接触角（WCA）为131.8°。在CO _2中浸泡十天后吸收剂方面，WCA仅下降了9.8％，表现出出色的疏水稳定性。此外，复合膜的CO ₂渗透率为61.8×10 ^-8 ·mol·m ^-2 ·s ^-1 ·Pa ^-1，理想的CO ₂ / N ₂分离系数为〜20，与之相比有效提高。与对照膜。在CO ₂吸收实验中，当液速为0.25 m·s ^-1时，制备的膜达到3.02×10 ^-3 ·mol·m ^-2 ·s ^-1的竞争性CO ₂通量。并显示出强大的长期运行稳定性。最后，采用交流阻抗技术连续监测复合膜的润湿状态，进一步研究了复合膜的抗润湿能力。