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게시일: Jun 05, 2014 5:18:25 AM
Jun Young Han, Ju Yeon Lee, Hyoung-Juhn Kim, Man-Ho Kim, Su Gyeong Han, Jong Hyun Jang, Eun Ae Cho, Sung Jong Yoo, Dirk Henkensmeier, “Synthesis and characterization of fluorene-based polybenzimidazole copolymer for gas separation”, Journal of Applied Polymer Science, 2014, 131(15), 40521-1 ~ 40521-9. (Wiley-VCH, IF:1.395, published date:2014).
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, 1H and 13C), 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 acid59 : 1) membrane have oxygen permeability coefficient (PO2) of 10.69 Barrer, theoretical selectivity of 5.4 for oxygen to nitrogen, and O2 diffusion coefficient of 9.64 3 1028 cm2/s. VC 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40521.
Scheme 1. Synthesis of PBI derivatives; polyphosphoric acid (PPA), phosphorus pentoxide, and methanesulfonic acid mixture (PPMA).
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