Morphology transition of asymmetric polyetherimide flat sheet membranes with different thickness by wet phase-inversion process
文献类型：期刊论文
| 作者 | Ren, Jizhong; Zhou, Jingqian; Deng, Maicun |
| 刊名 | separation and purification technology
 |
| 出版日期 | 2010-07-30 |
| 卷号 | 74期号:1页码:119-129 |
| 关键词 | Membrane structure Flat sheet membrane Critical structure-transition thickness Approaching ratio |
| 英文摘要 | in this paper, asymmetric flat sheet membranes are prepared with polyetherimide (pei)/n-methyl-2-pyrrolidone (nmp)/nonsolvent (ns, ns = h(2)o, ethanol (etoh), glycerin (pg), polyethylene glycol200 (peg200)) casting solutions by wet phase-inversion process with different approaching ratios. the thermodynamic behavior of pei/nmp/ns casting solutions is directly described with the modified lcc (linearized cloud point curve) correlation. for pei/nmp/ns (ns = h(2)o, pg) casting solutions, the critical approaching ratio alpha* does not exist and the finger-like macrovoids cannot be suppressed completely. but for pei/nmp/ns (ns = peg200, etoh) casting solutions, with the increase of approaching ratio, the membrane morphology changes from finger-like to sponge-like structure at the critical approaching ratio alpha*. for the flat sheet membranes prepared with pei/nmp/ns (ns = h(2)o, pg), with the increase of membrane thickness, the transition of membrane morphology from sponge-like to finger-like structure occurs at the critical structure-transition thickness lc, and the increase of approaching ratio induces the increase of the critical structure-transition thickness lc and the general sponge-like structure thickness lgs. but for the flat sheet membranes prepared with pei/nmp/ns (ns = etoh, peg200), when the approaching ratio is no less than the critical approaching ratio alpha*, the critical structure-transition thickness lc is not obtained and a fully sponge-like structure is prepared. (c) 2010 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; technology |
| 类目[WOS] | engineering, chemical |
| 研究领域[WOS] | engineering |
| 关键词[WOS] | gradient membranes ; system ; separation ; nonsolvent ; solvent ; polymer ; macrovoids ; mechanism ; evolution ; gelation |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000280542000015 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/141843]  |
| 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 | Dalian Inst Chem Phys, Natl Engn Res Ctr Membrane Technol, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ren, Jizhong,Zhou, Jingqian,Deng, Maicun. Morphology transition of asymmetric polyetherimide flat sheet membranes with different thickness by wet phase-inversion process[J]. separation and purification technology,2010,74(1):119-129. |
| APA | Ren, Jizhong,Zhou, Jingqian,&Deng, Maicun.(2010).Morphology transition of asymmetric polyetherimide flat sheet membranes with different thickness by wet phase-inversion process.separation and purification technology,74(1),119-129. |
| MLA | Ren, Jizhong,et al."Morphology transition of asymmetric polyetherimide flat sheet membranes with different thickness by wet phase-inversion process".separation and purification technology 74.1(2010):119-129. |
入库方式： OAI收割
来源：大连化学物理研究所
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