Journal
POLYMER CHEMISTRY
Volume 5, Issue 24, Pages 6914-6922Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4py01221f
Keywords
-
Categories
Funding
- KAUST
Ask authors/readers for more resources
A novel o-hydroxyl-functionalized spirobifluorene-based diamine monomer, 2,2'-dihydroxyl-9,9'-spirobifluorene-3,3'-diamine (HSBF), was successfully prepared by a universal synthetic method. Two o-hydroxyl-containing polyimides, denoted as 6FDA-HSBF and SPDA-HSBF, were synthesized and characterized. The BET surface areas of 6FDA-HSBF and SPDA-HSBF are 70 and 464 m(2) g(-1), respectively. To date, SPDA-HSBF exhibits the highest CO2 permeability (568 Barrer) among all hydroxyl-containing polyimides. The HSBF-based polyimides exhibited higher CO2/CH4 selectivity than their spirobifluorene (SBF) analogues (42 for 6FDA-HSBF vs. 27 for 6FDA-SBF) due to an increase in their diffusivity selectivity. Polybenzoxazole (PBO) membranes obtained from HSBF-based polyimide precursors by thermal rearrangement showed enhanced permeability but at the cost of significantly decreased selectivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available