Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이영무 | - |
dc.date.accessioned | 2017-10-17T08:18:33Z | - |
dc.date.available | 2017-10-17T08:18:33Z | - |
dc.date.issued | 2015-12 | - |
dc.identifier.citation | JOURNAL OF MEMBRANE SCIENCE, v. 493, Page. 329-339 | en_US |
dc.identifier.issn | 0376-7388 | - |
dc.identifier.issn | 1873-3123 | - |
dc.identifier.uri | http://www.sciencedirect.com/science/article/pii/S0376738815004998?via%3Dihub | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/30081 | - |
dc.description.abstract | Ortho-hydroxypolyimides (HPIs) undergo thermal rearrangement processes in a solid state at high temperatures to produce thermally rearranged polybenzoxazoles (TR-PBOs), which are promising materials for gas separation membranes due to their exceptional permeability-selectivity performance. The strong dependence between the structure of HPIs and the final properties of the TR-PBOs and the high cost of the HPI precursors are considered excellent reasons for their continued study. In this work, a set of low-cost HPIs were synthetized via the reaction of 2,2'-bis(3,4-dicarboxyphenyl)hexalluoropropane dianhydride (6FDA) with 2,4-diaminophenol dihydrochloride (DAP-Cl) and 4,6-diaminoresorcinol dihydrochloride (DAR-Cl). The polyimide made from 6FDA and m-phenylene diamine (MPD) was also obtained for comparison purposes. The polyimide precursors and the corresponding TR-PBOs, which were tested as films, were thoroughly characterized. The glass transition temperature of these precursor polyimides was shown to be a function of the number of hydroxyl groups such that the lowest value corresponded to the polyimide from MPD and the highest value corresponded to that derived from DAR. The conversion rate of HPIs to PBO at different processing temperatures was determined, and the highest conversion rate matched the DAP derived polyimide. With respect to their gas separation properties after thermal treatment at 450 degrees C, these HPIs gave rise to TR-PBOs with very high permeability and satisfactory permselectivity values for several gas pairs. (C) 2015 Elsevier B.V. All rights reserved. | en_US |
dc.description.sponsorship | The authors would like to thank the Ministry of Economy and Competitiveness (MINECO) for the financial support of this work within the framework of the Plan Nacional de I-D+i through the research projects; MAT2011-25513, MAT2010-20668 and MAT2013-45071-R. This research was also supported by the Korea Carbon Capture & Sequestration R&D Center (KCRC) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (NRF-2014M1A8A1049305). The authors also greatly appreciate the help provided by Sara Rodriguez in measuring gas separation properties and the assistance of Prof. Ted Greiner. | en_US |
dc.language.iso | en | en_US |
dc.publisher | ELSEVIER SCIENCE BV | en_US |
dc.subject | Aromatic ortho-hydroxypolyimides | en_US |
dc.subject | Thermally rearranged (TR) polymers | en_US |
dc.subject | Gas separation membranes | en_US |
dc.subject | Polybenzoxazoles | en_US |
dc.subject | Fractional free volume | en_US |
dc.title | Thermally rearranged polybenzoxazoles and poly(benzoxazole-co-imide)s from ortho-hydroxyamine monomers for high performance gas separation membranes | en_US |
dc.type | Article | en_US |
dc.relation.volume | 493 | - |
dc.identifier.doi | 10.1016/j.memsci.2015.05.061 | - |
dc.relation.page | 329-339 | - |
dc.relation.journal | JOURNAL OF MEMBRANE SCIENCE | - |
dc.contributor.googleauthor | Comesana-Gandara, Bibiana | - |
dc.contributor.googleauthor | Hernandez, Antonio | - |
dc.contributor.googleauthor | de la Campa, Jose G. | - |
dc.contributor.googleauthor | de Abajo, Javier | - |
dc.contributor.googleauthor | Lozano, Angel E. | - |
dc.contributor.googleauthor | Lee, Young Moo | - |
dc.relation.code | 2015002566 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ENERGY ENGINEERING | - |
dc.identifier.pid | ymlee | - |
dc.identifier.researcherID | G-5920-2015 | - |
dc.identifier.orcid | http://orcid.org/0000-0002-5047-3143 | - |
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