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Preparation and gas separation performances of low temperature pyrolytic carbon membranes

Authors： DONG Junying1, LI Lin1,CHEN Anliang1,CAO Yue1, WANG Hong2，WANG Tonghua1*,LI Jianxin2, ,CAO Yiming3

Units： 1.State Key Laboratory of Fine Chemicals, Carbon Research Laboratory, R&D Center of Membrane Science, School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China

KeyWords： polyimide; low temperature pyrolysis; structure; gas separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2012,32(3):22-27

Abstract：

Low temperature pyrolytic membranes were prepared from Kapton-Type Polyimide. TG-MS, FTIR, EA, XRD and gas permeability were used to character the change of chemical structure and microstructure, the gas separation performance during the low temperature pyrolysis at different temperatures and atmosphere. Results show that pyrolytic temperature and atmosphere have a great impact on chemical and carbon structure and the gas separation performance of low temperature carbon membrane. There is no evident variation of gas permeability before 450℃ and the gradual enlargement in gas permeability and decrease in gas selectivity with the increase of temperature after 450℃. The carbon membranes prepared in air have a larger gas permeability and lower selectivity than those prepared in nitrogen.

Funds：

国家自然科学基金面上与重点项目(20776024,20976021,20836006), 国家863项目2009AA03Z215，天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地开放基金

AuthorIntro：

董军营(1984-)，男，山东人，硕士生，从事炭材料及膜材料的研究

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