Porous polyvinylidene fluoride (PVDF)-filled MWCNT hollow fiber mixed matrix membranes were fabricated and applied for carbon dioxide absorption in a gas–liquid membrane contactor with Al₂O₃ water-based nanofluid absorbent. The formation of MWCNTs’ nanotubes was verified through Transmission electron microscopy (TEM) and Field emission scanning electron microscopy (FESEM) images while the resultant membranes were characterized for their morphology, gas permeation rate, pore size, porosity, surface hydrophilicity and wettability resistance. Upon the incorporation of MWCNT into the matrix, the formation of finger-like pores was facilitated and surface roughness increased. Gas permeation test results showed increasing the surface porosity and reducing the pore size. The surface contact angle also was improved from 83° ± 1.5 for the unfilled membrane to 103° ± 1.5 for the membrane containing 5 wt% CNT. CO₂ absorption flux also was enhanced considerably. For instance, the flux of the membrane containing 5 wt% CNT as the best performing membrane at a liquid velocity of 2.5 m/s and Al₂O₃ water-based nanofluid as absorbent was 3.85 × 10⁻³ mol/m² s which was approximately 200% higher than that of the plain membrane at the same operating conditions. A long-term absorption test also revealed non-wetting tendencies of the membranes as well as the unclogged membrane pores by the nanomaterials existed in the nanofluid absorbent. Therefore, it could be hypothesized that the improved membrane structure and synthesized nanofluid absorbent considering their superior performance to several commercial and in-house made membranes can be suitable alternatives to the current polymeric membranes and commercial used absorbents, respectively.

制备了多孔聚偏二氟乙烯（PVDF）填充的MWCNT中空纤维混合基质膜，并将其用于与Al ₂ O ₃接触的气液膜接触器中的二氧化碳吸收水性纳米流体吸收剂。通过透射电子显微镜（TEM）和场发射扫描电子显微镜（FESEM）图像验证了MWCNTs纳米管的形成，同时表征了所得膜的形态，气体渗透率，孔径，孔隙率，表面亲水性和耐湿性。在将MWCNT掺入基质中时，促进了手指状孔的形成并且增加了表面粗糙度。气体渗透测试结果表明，增加了表面孔隙率并减小了孔径。表面接触角也从未填充的膜的83°±1.5改善到包含5 wt％CNT的膜的103°±1.5。一氧化碳₂吸收通量也大大提高。例如，以2.5 m / s的液体速度含有5 wt％CNT作为最佳性能的膜和以Al ₂ O ₃水性纳米流体作为吸收剂的膜的通量为3.85×10 ^-3  mol / m ^2。 在相同的操作条件下，它比平膜高约200％。长期吸收测试还显示出了膜的非润湿趋势，以及存在于纳米流体吸收剂中的纳米材料的未堵塞膜孔。因此，可以假设考虑到它们优于几种商业和内部制造的膜的优异性能，改进的膜结构和合成的纳米流体吸收剂可以分别替代当前的聚合物膜和商业使用的吸收剂。