Concentration Fluctuations near Lower Critical Solution Temperature in Ternary Aqueous Solutions
文献类型：期刊论文
| 作者 | Jia D(贾迪); Cheng H(程贺) ; Harnmouda, B; Han, CC; Cheng, H; Muthukumar, M; Jia, D
|
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2017 |
| 卷号 | 50期号:18页码:7291-7298 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/acs.macromol.7b01502 |
| 文献子类 | Article |
| 英文摘要 | The effects of osmolytes, such as trimethylamine N-oxide (TMAO), on the phase transition in an aqueous solution of polymer, protein, or DNA are very complex, and several phase transitions can occur. In order to explore such effects, we take a simple ternary system of poly(N,N-diethylacrylarnide) and a 'favorable solvent pair TMAO and water to monitor the reduction in the miscibility of the polymer using small-angle neutron scattering (SANS) and dynamic light scattering (DLS). The result shows that the LCST of PDEA solutions is significantly depressed by TMAO. Although DLS data dearly show that aggregates can form, as precursors in the homogeneous one phase region depending on the TMAO concentration, after removing the low-q aggregate region, the three-component system still obeys the mean-field theory. Based on the ternary random phase approximation (RPA) theory, three Flory-Huggins interaction parameters, i.e., XD2O-TMAO, XPDEA-TMAO, and x(pDEA-D20), are obtained to reveal the microscopic origin of this shift in LCST; that is, the strong TMAO-D2O interaction leads to the decrease of LCST. Our study opens up many directions to explore effects such as the interference between aggregation and microphase separation. |
| 电子版国际标准刊号 | 1520-5835 |
| WOS关键词 | TRIMETHYLAMINE N-OXIDE ; TO-COIL TRANSITION ; WATER/METHANOL MIXTURES ; MOLECULAR-DYNAMICS ; WATER ; POLY(N-ISOPROPYLACRYLAMIDE) ; CONONSOLVENCY ; PNIPAM ; METHANOL ; CHAINS |
| WOS研究方向 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000411918700029 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284991]  |
| 专题 | 高能物理研究所_东莞分部 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Jia D,Cheng H,Harnmouda, B,et al. Concentration Fluctuations near Lower Critical Solution Temperature in Ternary Aqueous Solutions[J]. MACROMOLECULES,2017,50(18):7291-7298. |
| APA | 贾迪.,程贺.,Harnmouda, B.,Han, CC.,Cheng, H.,...&Jia, D.(2017).Concentration Fluctuations near Lower Critical Solution Temperature in Ternary Aqueous Solutions.MACROMOLECULES,50(18),7291-7298. |
| MLA | 贾迪,et al."Concentration Fluctuations near Lower Critical Solution Temperature in Ternary Aqueous Solutions".MACROMOLECULES 50.18(2017):7291-7298. |
入库方式： OAI收割
来源：高能物理研究所
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