期刊論文
| 學年 | 86 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 1998-06-01 |
| 作品名稱 | Formation of crystalline EVAL membranes by controlled mass transfer process in water–DMSO–EVAL copolymer systems |
| 作品名稱（其他語言） | |
| 著者 | 鄭廖平; Cheng, Liao-ping; Young, Tai-horng; You, Wei-ming |
| 單位 | 淡江大學化學工程與材料工程學系 |
| 出版者 | Amsterdam: Elsevier BV |
| 著錄名稱、卷期、頁數 | Journal of membrane science 145(1), pp.77-90 |
| 摘要 | The effect of solvent content in the coagulation bath on the formation of poly(ethylene-co-vinyl alcohol) (EVAL) membranes by isothermal immersion–precipitation in water–dimethylsulfoxide (DMSO)–EVAL system has been investigated. As a homogeneous EVAL dope is immersed in a harsh bath, e.g., water, instant precipitation occurs initiated by the liquid–liquid demixing process. The formed membrane exhibits an asymmetric morphology with extensive finger-like macrovoids, similar to that observed in most amorphous polymeric membranes. On the other hand, if precipitation takes place in a soft bath containing a substantial amount of solvent, crystallization, rather than liquid–liquid demixing, starts to dominate and a skinless, bi-continuous, particulate membrane becomes the precipitated product. The immersion–precipitation process for the present system has been modeled as a ternary mass transfer problem. The calculated diffusion trajectories and concentration profiles illustrate reasonably the membrane morphologies formed in various immersion conditions. |
| 關鍵字 | EVAL; Crystallization; Liquid–liquid demixing; Immersion–precipitation; Diffusion |
| 語言 | en |
| ISSN | 0376-7388 |
| 期刊性質 | 國外 |
| 收錄於 | SCI EI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | |
| 國別 | NLD |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44168 ) |