Development of asymmetric BTDA-TDI/MDI (P84) copolyimide flat sheet and hollow fiber membranes for ultrafiltration: Morphology transition and membrane performance
文献类型：期刊论文
| 作者 | Ren, Jizhong1,2; Li, Zhansheng2 |
| 刊名 | desalination
 |
| 出版日期 | 2012-01-31 |
| 卷号 | 285页码:336-344 |
| 关键词 | Membrane morphology Membrane thickness Hollow fiber membrane Ultrafiltration Pore size distribution |
| 英文摘要 | in this paper, the effects of gamma-butyrolactone (gbl) weight ratio (w(gbl)) and membrane thickness on the formation of asymmetric flat sheet membranes prepared with p84 (btda-tdi/mdi co-polyimide)/n-methyl-2-pyrrolidone (nmp)/gbl casting solutions are investigated. with the increase of membrane thickness, the transition of membrane morphology from sponge-like to finger-like structure occurs at critical structure-transition thickness l-c. l-c and the general sponge-like structure thickness (l-gs) increase with w(gbl). for 20 wt.% p84/nmp/gbl casting solution, the membrane morphology changes from finger-like to sponge-like structure at the critical weight ratio of gbl (w* = 0.69). the membrane morphology and performance of hollow fibers spun with various w(gbl) are observed. compared with the hollow fiber membranes made of 18 wt.% p84/nmp/gbl dope solution with w(gbl) = 0.75, the hollow fiber membranes spun with w(gbl) = 0.25 present a higher permeation flux and a larger mwco. as w(gbl) increases from 0.25 to 0.75, the membrane morphology transfers from finger-like to sponge-like structure. an increase in shear rate shifts the rejection curves towards left, and lowers the mwco of hollow fiber membranes. for hollow fiber membranes spun with w(gbl) = 0.75, a relatively high permeation flux and a large mwco are obtained by the wet spinning process. (c) 2011 elsevier bm. all rights reserved. |
| WOS标题词 | science & technology ; technology ; physical sciences |
| 类目[WOS] | engineering, chemical ; water resources |
| 研究领域[WOS] | engineering ; water resources |
| 关键词[WOS] | phase-inversion process ; thickness-gradient membranes ; separation performance ; shear rate ; immersion precipitation ; gas separation ; polymer ; system ; spinneret ; rheology |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300478100044 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/142993]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Res Ctr Membrane Technol, Dalian 116023, Peoples R China 2.Nanyang Technol Univ, Inst Environm Sci & Engn, Singapore 637723, Singapore |
| 推荐引用方式 GB/T 7714 | Ren, Jizhong,Li, Zhansheng. Development of asymmetric BTDA-TDI/MDI (P84) copolyimide flat sheet and hollow fiber membranes for ultrafiltration: Morphology transition and membrane performance[J]. desalination,2012,285:336-344. |
| APA | Ren, Jizhong,&Li, Zhansheng.(2012).Development of asymmetric BTDA-TDI/MDI (P84) copolyimide flat sheet and hollow fiber membranes for ultrafiltration: Morphology transition and membrane performance.desalination,285,336-344. |
| MLA | Ren, Jizhong,et al."Development of asymmetric BTDA-TDI/MDI (P84) copolyimide flat sheet and hollow fiber membranes for ultrafiltration: Morphology transition and membrane performance".desalination 285(2012):336-344. |
入库方式： OAI收割
来源：大连化学物理研究所
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