Indexed by:Journal Article

Date of Publication:2021-01-01

Journal:JOURNAL OF APPLIED POLYMER SCIENCE

Volume:138

Issue:8

ISSN:0021-8995

Key Words:CO(2)separation; Pebax; Mixed matrix membranes and MXene

Abstract:The packing pattern of two-dimensional (2D) sheet-like fillers in membranes is relatively random, leading to the unfavorable permeability from tortuous diffusion pathway. A new strategy that using prestructured materials with uniform channels as fillers was proposed. In this work, Ti(3)AlC(2)is etched to prepare multilayered MXene (m-MXene), the channels aggregate as a whole unit, ensure the impossibility of ineffective packing compared with traditional individual sheets, largely facilitating the selective permeation. Then, the m-MXene/Poly (amide-6-b-ethylene oxide) (Pebax) MMMs are synthesized. SEM images demonstrate the accordion shaped structure of filler, which is the multi-channels laminates. Furthermore, the results of gas permeation test exhibit enhanced performance of m-MXene/Pebax MMMs. MMM with 0.5 wt.% m-MXene behaved best, CO(2)permeability of 86.22 Barrer as well as CO2/N(2)selectivity of 104.85, transcending the Robeson upper bound (2008). Having distinct enhancement for CO(2)separation, the m-MXene/Pebax MMMs in this work offer prospective practical applications.