【摘要】 分别以亲水性和疏水性聚合物溶液为外层和内层制膜液，通过共挤出法制备双层膜.以正丙醇为芯液，水为凝胶浴，调控成膜过程中的热力学和动力学参数，成功制备出外层亲水/内层疏水的Janus中空纤维膜.Janus中空纤维膜的外层水接触角为44°,内层水接触角为131°.将Janus膜应用于模拟烟道气中CO₂吸收研究，考察气/液压差、吸收液体积流量和亲/疏水层厚度对CO₂吸收性能的影响.结果表明，当气-液压差为0.11 MPa时，模拟烟道气中CO₂吸收率达到99.43%,气体处理通量为6 050 L/（m²·h）;在240 min连续吸收过程中，Janus膜的气体处理通量和CO₂吸收率保持稳定.更多还原

【Abstract】 The dual-layer membranes were prepared by co-extrusion method which adopt hydrophilic and hydrophobic dope solutions as the outer and inner membrane solutions. With n-propanol as the bore liquid and water as the external water bath, the thermodynamic and kinetic parameters in the film-forming process were adjusted to successfully prepare the Janus hollow fiber membrane which had a structure of outer hydrophilic/inner hydrophobic. The water contact angle of the outer layer and inner layer of the Janus hollow fiber membrane were 44° and 131° separately. Janus membrane was applied to the absorption process of CO₂ in simulated flue gas. The effects of gas/liquid pressure difference, absorbent volume flow and hydrophilic/hydrophobic layer thickness on CO₂ absorption performance were investigated. When the gas/liquid pressure difference was 0.11 MPa, the CO₂ absorption rate in the simulated flue gas reached 99.43%, and the gas treatment flux was 6 050 L/（m²·h）. During the 240 min continuous absorption process, the gas treatment flux and CO₂ absorption rate remained stable.更多还原