417738 Effect of Cross-Linker on 6FDA-Durene-ZIF71 Mmms for Hydrogen/Carbon Dioxide Separation

Thursday, November 12, 2015: 1:54 PM
155B (Salt Palace Convention Center)
Susilo Japip1, Kuo-Sung Liao1, You Chang Xiao2 and Tai Shung Chung3, (1)Chemical & Biomolecular Engineering, National University of Singapore, Singapore, Singapore, (2)Suzhou Industrial Park, Suzhou Faith and Hope Membrane Technology Co. Ltd., Jiangsu Province, China, (3)Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore

Interfacial void induced low selectivity is a critical drawback for mixed matrix membranes (MMMs) applied to gas separation. In this study, post-synthetic functionalization of fabricated MMMs by TAEA vapor-induced covalently interconnecting polymeric networks (CIPNs) technology has been employed to molecularly tune the 6FDA-Durene-ZIF-71 MMMs from CO2-selective into H2-selective via enhancement of the molecular-sieving properties. The new selective layer comprise of polyamide-based matrix and ZIF-71, interfacial void was refilled by vaporous TAEA treatment.

Both X-ray Photoelectron Spectroscopy (XPS) and Doppler Broadening Energy Spectroscopy (DBES) results reveal that non-selective interfacial voids between particle-particle and particle-polymer have been mitigated by construction of vapor-induced based CIPNs inside the ZIF-71 based MMMs. TGA-IR demonstrated the high thermal stability of resultant membranes and the feasibility of applying the fabricated membranes in a high temperature H2/CO2 separation application. Embedding 10 wt% of ZIF-71 nano-particles with size of less than 100 nm inside the TAEA-treated 6FDA-Durene membrane further enhances the pure H2 permeability by 80% (from 300 Barrer to 540 Barrer) and the ideal H2/CO2 selectivity by 34% (from 46.8 to 62.5). The newly developed technology of tripodal amine-based vapor induced CIPNs may solve the most challenging issue in MMMs fabrication and may molecularly tune the MMMs to fit in a specific industrial gas separation application.

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See more of this Session: Membranes for Gas Separations II
See more of this Group/Topical: Separations Division