P84/ZCC Hollow Fiber Mixed Matrix Membrane with PDMS Coating to Enhance Air Separation Performance

Abstract

This research introduces zeolite carbon composite (ZCC) as a new filler on polymeric membranes based on the BTDA-TDI/MDI (P84) co-polyimide for the air separation process. The separation performance was further improved by a polydimethylsiloxane (PDMS) coating to cover up the surface defect. The incorporation of 1 wt% ZCC into P84 co-polyimide matrix enhanced the O2 permeability from 7.12 to 18.90 Barrer (2.65 times) and the O2/N2 selectivity from 4.11 to 4.92 Barrer (19.71% improvement). The PDMS coating on the membrane further improved the O2/N2 selectivity by up to 60%. The results showed that the incorporation of ZCC and PDMS coating onto the P84 co-polyimide membrane was able to increase the overall air separation performance.

Fabrication of Polydimethysiloxane (PDMS) Dense Layer on Polyetherimide (PEI) Hollow Fiber Support for the Efficient CO2/N2 Separation Membranes

“…To enhance the gas-separation performance by increasing the gas permeance and selectivity simultaneously, 2D nanomaterials, such as surface-modified graphene oxide (GO) containing CO 2 -philic functional groups [ 61 , 62 , 63 ] and nitrogen-doped graphene nanosheets [ 64 , 65 ], will be incorporated in the selective coating layer in the further works. Moreover, the conditions for the preparation of mixed matrix hollow fiber membranes [ 66 ] will be optimized by using chemometric methods [ 67 ].…”

Development of Amine-Functionalized Metal-Organic Frameworks Hollow Fiber Mixed Matrix Membranes for CO2 and CH4 Separation: A Review

“…To further enhance the performance of MMMs, incorporation of fillers into HFM configuration will form a hollow fiber mixed matrix membrane (HFMMM). HFMMMs have a significant advantage over conventional flat sheet membranes and hollow fiber membranes such as a better separation factor, mechanical strength, and thermal and chemical resistivity [ 90 , 91 ].…”

Annealing and TMOS coating on PSF/ZTC mixed matrix membrane for enhanced CO 2 /CH 4 and H 2 /CH 4 separation

“…The polymer membrane is a material that is currently widely used in large-scale industry for gas separation processes because of its good mechanical properties and flexibility [15][16][17]. However, the gas separation performance, which is affected by the trade-off between permeability and selectivity as shown by the Robeson curve, is one of the weaknesses of polymer membranes [18].…”