点击次数：

论文类型：期刊论文

发表时间：2010-09-30

发表刊物：JOURNAL OF MEMBRANE SCIENCE

收录刊物：SCIE、EI

卷号：361

期号：1-2

页面范围：22-27

ISSN号：0376-7388

关键字：Chemical structure; Carbon membranes; Gas separation; Poly(furfuryl alcohol)

摘要：Carbon molecular sieve (CMS) membranes derived from two kinds of PFAs synthesized by oxalic acid and iodine catalyst were prepared respectively. In order to investigate the effect of chemical structure of the PFAs on properties of their CMS membranes, TG, FTIR, XRD and HRTEM were employed to characterize the microstructural change of CMS membranes during pyrolysis. Gas separation performance of CMS membranes was also investigated by molecular probe study with pure gases (H(2), CO(2), O(2), N(2) and CH(4)). The results show two kinds of PFAs are composed of a large amount of same function groups by different cross-linking style, which was confirmed by their similar MR spectra and slightly different TG curves. After pyrolysis, there are significant differences in microstructure and gas permeation for resultant CMS membranes. The PFA-OA carbon membrane exhibits high carbon yield, smaller d(0) (02) value (interlayer spacing) and short, slightly irregular but roughly parallel fringes in HRTEM. In contrast, the PFA-I carbon membrane shows a higher gas permeability and lower gas permselectivity in gas permeation experiments. (C) 2010 Elsevier B.V. All rights reserved.