Diffusion of single polyelectrolytes on the surface of poly (N-isopropylacrylamide) brushes
文献类型：期刊论文
| 作者 | Wang, Wei1,2; Zhang, Cunfu1,2; Wang, Shengqin1,2; Zhao, Jiang1 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2007-12-25 |
| 卷号 | 40期号:26页码:9564-9569 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma0710535 |
| 英文摘要 | Lateral diffusion of a single polyelectrolyte probe, poly(2-vinylpyridine) (P2VP), on the surface of thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) brushes was studied by fluorescence correlation spectroscopy. Measurements were conducted at a condition of a low pH value and a low salt concentration., under which the P2VP chain is fully charged and at its extended coil conformation. The temperature dependence Of the Surface diffusion coefficient (D-s) of P2VP was studied at varying PNIPAM thickness, in which D, increased with the elevation of temperature and reached a maximum value around 32-35 degrees C before it dropped at further increased temperature. The experimental results indicate a linear dependence of the friction force experienced by the probe on the brush thickness. The thermovariation of D, demonstrates the decrease of the surface friction force at temperature lower than 32-35 degrees C due to the decrease of the solvent viscosity and a sharp increase after the LCST transition because of the change of the PNIAPM chain rigidity. |
| 语种 | 英语 |
| WOS记录号 | WOS:000251724700051 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/62485]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhao, Jiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Mat & Sci,Beijing Natl Lab Mol, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Wei,Zhang, Cunfu,Wang, Shengqin,et al. Diffusion of single polyelectrolytes on the surface of poly (N-isopropylacrylamide) brushes[J]. MACROMOLECULES,2007,40(26):9564-9569. |
| APA | Wang, Wei,Zhang, Cunfu,Wang, Shengqin,&Zhao, Jiang.(2007).Diffusion of single polyelectrolytes on the surface of poly (N-isopropylacrylamide) brushes.MACROMOLECULES,40(26),9564-9569. |
| MLA | Wang, Wei,et al."Diffusion of single polyelectrolytes on the surface of poly (N-isopropylacrylamide) brushes".MACROMOLECULES 40.26(2007):9564-9569. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。