Polyelectrolyte uptake by PEMs: Impacts of molecular weight and counterion
文献类型：期刊论文
| 作者 | Zan, Xingjie1; Hoagland, David A.2; Wang, Tian1; Peng, Bo1; Su, Zhaohui1 |
| 刊名 | POLYMER
 |
| 出版日期 | 2012-10-12 |
| 卷号 | 53期号:22页码:5109-5115 |
| 关键词 | Polyelectrolyte Multilayers Polyelectrolyte Diffusion |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2012.09.011 |
| 英文摘要 | Presented with an elevated level of aqueous salt, a polyelectrolyte multilayer (PEM) swells and subsequently can undergo large mass uptake when exposed to a salt solution containing the capping polyelectrolyte. Features of the uptake depend on the properties of polyelectrolyte (molecular weight, polydispersity, concentration), solvent (salt concentration and ion identities), and PEM (number of layers, polyelectrolyte identities). Here, poly(diallyldimethylammonium chloride)/poly(styrene sulfonate) (PSS) PEMs capped with PSS are investigated by Quartz Crystal Microbalance with Dissipation during successive challenges by salt and PSS. Only when the salt level is substantially higher than at PEM construction, leading to large PEM swelling, does PSS uptake become significant. Steady state uptake grows and then levels off with PSS molecular weight; the crossover to molecular weight independence falls with salt concentration. Across the dilute PSS range, uptake mechanisms are not affected by solution concentration, although at very dilute concentration, the rate limiting process becomes diffusion in solution rather than in PEM. Swelling of PEM by salt, and hence rate of uptake and ultimate uptake, correlate with the salt anion's position in the Hofmeister series. (C) 2012 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000310040800025 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/47547]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Su, Zhaohui |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Massachusetts, Polymer Sci & Engn Dept, Amherst, MA 01003 USA |
| 推荐引用方式 GB/T 7714 | Zan, Xingjie,Hoagland, David A.,Wang, Tian,et al. Polyelectrolyte uptake by PEMs: Impacts of molecular weight and counterion[J]. POLYMER,2012,53(22):5109-5115. |
| APA | Zan, Xingjie,Hoagland, David A.,Wang, Tian,Peng, Bo,&Su, Zhaohui.(2012).Polyelectrolyte uptake by PEMs: Impacts of molecular weight and counterion.POLYMER,53(22),5109-5115. |
| MLA | Zan, Xingjie,et al."Polyelectrolyte uptake by PEMs: Impacts of molecular weight and counterion".POLYMER 53.22(2012):5109-5115. |
入库方式： OAI收割
来源：化学研究所
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