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Synthesis and characterization of fluorene‐based polybenzimidazole copolymer for gas separation
Author(s) -
Han Jun Young,
Lee Ju Yeon,
Kim HyoungJuhn,
Kim ManHo,
Han Su Gyeong,
Jang Jong Hyun,
Cho Eun Ae,
Yoo Sung Jong,
Henkensmeier Dirk
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40521
Subject(s) - copolymer , oxygen permeability , permeation , materials science , barrer , polymer chemistry , fluorene , monomer , fourier transform infrared spectroscopy , membrane , chemical engineering , oxygen , permeability (electromagnetism) , gas separation , thermogravimetric analysis , gaseous diffusion , analytical chemistry (journal) , polymer , chemistry , organic chemistry , composite material , fuel cells , biochemistry , engineering
ABSTRACT The purpose of this study is to develop new cardo‐polybenzimidazole (CPBI) copolymers containing cardo fluorene, with improved gas permeability, specifically oxygen permeability. The characteristics of these copolymers are investigated by Fourier transform infrared spectroscopy, nuclear magnetic resonance, 1 H and 13 C), thermo‐gravimetric analysis, and wide‐angle X‐ray diffraction. These membranes fabricated from copolymers have relatively high oxygen diffusion coefficients, determined using gas permeation. In particular, the CPBI‐co91 (synthesized by using the monomers ratio containing dibenzoic acid = 9 : 1) membrane have oxygen permeability coefficient ( P O2 ) of 10.69 Barrer, theoretical selectivity of 5.4 for oxygen to nitrogen, and O 2 diffusion coefficient of 9.64 × 10 −8 cm 2 /s. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40521.