Abstract
Microporous polyimides (PIM-PIs, KAUST-PIs) and polymers containing Tröger's base (TB) derivatives with improved permeability and selectivity have great importance for separation of environmental gas pairs. Despite the tremendous progress in this field, facile synthesis of microporous polymers at the industrial scale via designing new monomers is still lacking. In this study, a new potential approach for large scale synthesis of spirobisindane diamine (DAS) (3) has been reported from commercially available 5,5′,6,6′-tetrahydroxy-3,3,3′,3′-tetramethyl-1,1′-spirobisindane (TTSBI) and 3,4-difluoronitrobenzene. A series of DAS diamine based microporous polyimides were also synthesized. The resulting polymer membranes showed high mechanical and thermal properties with tunable gas separation performance.
Highlights
Microporous polyimides (PIM-PIs, KAUST-PIs) and polymers containing Troger's base (TB) derivatives with improved permeability and selectivity have great importance for separation of environmental gas pairs
Most conventional PIs suffer from low fractional free volume (FFV) and low gas permeabilities that need to be improved in large scale practical applications.[19,20]
polymers of intrinsic microporosity (PIMs)-PIs and KAUSTPIs were generally prepared from contorted dianhydride (A) and commercially available diamine in which the main emphasis is given to the use of contorted dianhydride monomer and an aromatic diamine in PIs synthesis (Route 1)
Summary
Open Access Article. Published on 07 February 2018. Downloaded on 10/5/2020 2:41:53 PM. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Received 23rd November 2017 Accepted 31st January 2018 DOI: 10.1039/c7ra12719g rsc.li/rsc-advances
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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 call
