Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이영무 | - |
dc.date.accessioned | 2021-05-17T07:01:57Z | - |
dc.date.available | 2021-05-17T07:01:57Z | - |
dc.date.issued | 2020-03 | - |
dc.identifier.citation | JOURNAL OF MEMBRANE SCIENCE, v. 604, article no. 118053 | en_US |
dc.identifier.issn | 0376-7388 | - |
dc.identifier.issn | 1873-3123 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0376738820306323?via%3Dihub | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/162189 | - |
dc.description.abstract | A novel bulky and rigid ortho-hydroxyl diamine, 3,3'-diamino-5,5',6,6'-tetramethyl-[1,1'-biphenyl]-2,2'-diol (TMBDA), was synthesized for gas separation membranes in this study. The chemical structure of TMBDA with four methyl groups and a fixed twist biphenyl center was rationally designed, and consequently presented a superior energy barrier of rotation, which efficiently suppressed chain motion and enhanced polymer rigidity. Four types of TMBDA-based polyimides (PIs) were prepared with two commercially available dianhydrides, i.e., 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and pyromellitic dianhydride (PMDA), from two different synthetic routes, azeotropic and chemical imidization. Thermally rearranged (TR) polymers were obtained from TMBDA-based PIs by thermal treatment at various temperatures. Thermal properties and physicochemical characteristics of TMBDA-based PIs and TR polymers were investigated. The resulting polymers exhibited high glass transition temperatures (T-g) and contorted backbone structures with three discrete d-spacing values, where the smallest interchain d-spacing was located between the kinetic diameters of H-2 and CH4 molecules. Moreover, TMBDA-based TR polymers showed outstanding performances in hydrogen separation with comparable H-2 permeability and higher selectivity than reported TRs. For instance, 6F-TM-Ac-425 exhibited a H-2 permeability of 325 Barrer with H-2/CH4 and H-2/N-2 selectivities of 50 and 39, respectively, approaching to the 2008 Robeson upper bound. | en_US |
dc.description.sponsorship | This research was supported by the Technology Development Program to Solve Climate Change (2018M1A2A2061979) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, South Korea. | en_US |
dc.language.iso | en | en_US |
dc.publisher | ELSEVIER | en_US |
dc.subject | Polyimides | en_US |
dc.subject | TR polymers | en_US |
dc.subject | High rigidity | en_US |
dc.subject | Hydrogen separation | en_US |
dc.subject | Membranes | en_US |
dc.title | Thermally rearranged polymer membranes containing highly rigid biphenyl ortho-hydroxyl diamine for hydrogen separation | en_US |
dc.type | Article | en_US |
dc.relation.volume | 604 | - |
dc.identifier.doi | 10.1016/j.memsci.2020.118053 | - |
dc.relation.page | 1-12 | - |
dc.relation.journal | JOURNAL OF MEMBRANE SCIENCE | - |
dc.contributor.googleauthor | Hua, Xiaofan | - |
dc.contributor.googleauthor | Lee, Won Hee | - |
dc.contributor.googleauthor | Zhao, Jiayi | - |
dc.contributor.googleauthor | Kim, Ju Sung | - |
dc.contributor.googleauthor | Wang, Zhen | - |
dc.contributor.googleauthor | Yan, Jingling | - |
dc.contributor.googleauthor | Zhuang, Yongbing | - |
dc.contributor.googleauthor | Lee, Young Moo | - |
dc.relation.code | 2020050569 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ENERGY ENGINEERING | - |
dc.identifier.pid | ymlee | - |
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