Ultrathin polyamide nanofiltration membranes with tunable chargeability for multivalent cation removal
文献类型：期刊论文
| 作者 | Wang, Zhen; You, Xinda; Yang, Chao; Li, Wenwen; Li, Yafei; Li, Ya; Shen, Jianliang; Zhang, Runnan; Su, Yanlei; Jiang, Zhongyi |
| 刊名 | JOURNAL OF MEMBRANE SCIENCE
 |
| 出版日期 | 2022 |
| 卷号 | 642 |
| 关键词 | LOW-PRESSURE WATER INTERFACIAL POLYMERIZATION CROSS-LINKING NETWORK FORMATION PERFORMANCE LAYER PH POLYETHYLENEIMINE NANOPARTICLES NANOFILMS |
| 英文摘要 | Positively charged nanofiltration membranes are promising in water softening and heavy metal ion removal. However, facile modulation on their chargeability remains a great challenge. Here, we proposed a charged monomer-engineered interfacial polymerization toward positively charged polyamide membranes. In particular, branched amino macromolecules (BAMs) with different charged group numbers and molecular sizes were selected as aqueous monomers, allowing for wide-range-tunable membrane chargeability. We found that larger BAMs tend to form intramolecularly crosslinked networks with more amino residues, conferring membrane chargeability up to +5.53 mC m(-2). Besides, the slower diffusion of larger BAMs also led to ultrathin membranes down to 9.0 nm in thickness. The optimal composite nanofiltration membrane displayed a high rejection to multivalent cations (e.g., MgCl2 rejection of 98.7%) with ultrahigh pure water permeance of 31.5 L m(-2) h(-1) bar(-1), which was around 2-10 times higher than that of the reported positively charged nanofiltration membranes. Our monomer design strategy for interfacial polymerization may evolve into a facile approach to constructing advanced charged membranes. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21228]  |
| 专题 | 2021专题_期刊论文 2022专题_期刊论文 |
| 作者单位 | 1.Su, YL 2.Jiang, ZY (corresponding author), Tianjin Univ, Sch Chem Engn & Technol, 92 Weijin Rd, Tianjin 300072, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wang, Zhen,You, Xinda,Yang, Chao,et al. Ultrathin polyamide nanofiltration membranes with tunable chargeability for multivalent cation removal[J]. JOURNAL OF MEMBRANE SCIENCE,2022,642. |
| APA | Wang, Zhen.,You, Xinda.,Yang, Chao.,Li, Wenwen.,Li, Yafei.,...&Jiang, Zhongyi.(2022).Ultrathin polyamide nanofiltration membranes with tunable chargeability for multivalent cation removal.JOURNAL OF MEMBRANE SCIENCE,642. |
| MLA | Wang, Zhen,et al."Ultrathin polyamide nanofiltration membranes with tunable chargeability for multivalent cation removal".JOURNAL OF MEMBRANE SCIENCE 642(2022). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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