Preparation, evaluation and modification of PVDF-CTFE hydrophobic membrane for MD desalination application
文献类型：期刊论文
| 作者 | Wei, Yuansong; Zheng, Libing; Wang, Jun; Li, Jie; Zhang, Yong; Li, Kun |
| 刊名 | DESALINATION
 |
| 出版日期 | 2017-01-16 |
| 卷号 | 402期号:0页码:162-172 |
| 关键词 | Pvdf-ctfe Md Desalination Membrane Modification Interconnectivity Dehalogenation Membrane Shrinkage |
| 英文摘要 | Desalination by membrane distillation (MD) have found rapid growth and diversified applications in recent decade, associated with it was the demand for hydrophobic membranes. Poly (vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) was used for hydrophobic membrane preparation with LiCl additive by non-solvent induced phase inversion (NIPS), the effect of polymer concentration was investigated in terms of membrane morphology, pore structure, hydrophobicity, thermal property, and membrane distillation (MD) performance to evaluation its potential in MD desalination. It was found that the solid-liquid demixing process showed more influence with increasing polymer content due to the delayed phase inversion process, which was responsible for the suppressed macrovoids, reduced pore size, higher hydrophobicity and pore interconnectivity. The melting temperature and crystallinity also increased due to the crystallization during membrane formation. M3 with 12% polymer content presents the best MD performance (permeate flux of 20.65 kg/m(2).h with a salt rejection higher than 99.95%). Ethanol and sodium hydroxide (NaOH) solution were applied as the second immersion bath to post-treat the nascent membranes. Pore enlargement effect was found for both post-treated membranes. However, the dehalogenation process was the most important mechanism for NaOH, while the obstruction of partial shrinkage was the mechanism of ethanol solution. In a word, PVDF-CTFE hydrophobic membrane show potential in MD desalination, especially when a second solution bath is used for membrane modification as the flux enhancement without the sacrifice of salt rejection. (C) 2016 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39551]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wei, Yuansong,Zheng, Libing,Wang, Jun,et al. Preparation, evaluation and modification of PVDF-CTFE hydrophobic membrane for MD desalination application[J]. DESALINATION,2017,402(0):162-172. |
| APA | Wei, Yuansong,Zheng, Libing,Wang, Jun,Li, Jie,Zhang, Yong,&Li, Kun.(2017).Preparation, evaluation and modification of PVDF-CTFE hydrophobic membrane for MD desalination application.DESALINATION,402(0),162-172. |
| MLA | Wei, Yuansong,et al."Preparation, evaluation and modification of PVDF-CTFE hydrophobic membrane for MD desalination application".DESALINATION 402.0(2017):162-172. |
入库方式： OAI收割
来源：生态环境研究中心
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