Abstract
Novel mixed matrix membranes (MMMs) were prepared using Matrimid (M), polysulfone (PSF) or polyphenylene oxide (PPO) as the continuous phase and a porous biphenyl-based knitting aryl polymer as a filler, synthesized through the Friedel–Craft reaction. The filler had little influence on the thermal and morphological properties of the membranes but affected the mechanical and gas transport properties, which were different depending on the type of matrix. Thus, in the case of MMMs based on Matrimid, the filler increased considerably the permeability to all gases, although no improvements in selectivity were achieved. A PSF-based MMM showed minor permeability increases, but not in all gases, while the selectivity was particularly improved for hydrogen separations. A PPO-based MMM did not exhibit variation in permeability nor in permselectivity with the addition of the filler.
Highlights
The presence of fillers based on porous organic polymers (POPs) in gas separation membranes yield an interesting class of mixed matrix membranes because the organic composition of the filler offers better compatibility and adhesion with organic polymeric matrices
In some cases, the presence of POPs has served to slow down the ageing of the membranes [3,4,5]
We have recently reported the use of biphenyl-based knitting aryl polymers (KAPs) (K2Ph) and functionalized biphenyl-based KAPs with nitro and amino groups as fillers of a polycarbonate matrix [21]
Summary
The presence of fillers based on porous organic polymers (POPs) in gas separation membranes yield an interesting class of mixed matrix membranes because the organic composition of the filler offers better compatibility and adhesion with organic polymeric matrices. The incorporation of porous organic polymer (POP) fillers into these matrices has been explored: for example, porous polyimides fillers and benzimidazole-linked polymers (BILPs) have been used as fillers in Matrimid matrices [1,10]; hollow ionic covalent organic polymers and perylene-based polymers in polysulfone matrices [11,12]; and covalent triazine frameworks in both [13]. Another very interesting type of matrix with which to prepare mixed matrix membranes for gas separation is polyphenylene oxide (PPO) (Figure 1), a polar and semicrystalline polymer. The addition of inorganic fillers into semi-crystalline PPO matrices can produce amorphous PPO and improve the gas transport properties [16]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
