| Concentration fluctuations near lower critical solution temperature in ternary aqueous solutions | |
| Jia, Di1,2; Muthukumar, Murugappan3; Cheng, He1,2; Han, Charles C.4; Harnmouda, Boualem5 | |
| 刊名 | Macromolecules
 |
| 2017-09-26 | |
| 卷号 | 50期号:18页码:7291-7298 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/acs.macromol.7b01502 |
| 通讯作者 | Cheng, he(chenghe@ihep.ac.cn) ; Han, charles c.(c.c.han@szu.edu.cn) |
| 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. |
| 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 |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000411918700029 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2177066 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Cheng, He; Han, Charles C. |
| 作者单位 | 1.Chinese Acad Sci, CSNS, IHEP, Dongguan 523803, Peoples R China 2.DINS, Dongguan 523808, Peoples R China 3.Univ Massachusetts Amherst, Dept Polymer Sci & Engn, Amherst, MA 01003 USA 4.Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China 5.NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA |
| 推荐引用方式 GB/T 7714 | Jia, Di,Muthukumar, Murugappan,Cheng, He,et al. Concentration fluctuations near lower critical solution temperature in ternary aqueous solutions[J]. Macromolecules,2017,50(18):7291-7298. |
| APA | Jia, Di,Muthukumar, Murugappan,Cheng, He,Han, Charles C.,&Harnmouda, Boualem.(2017).Concentration fluctuations near lower critical solution temperature in ternary aqueous solutions.Macromolecules,50(18),7291-7298. |
| MLA | Jia, Di,et al."Concentration fluctuations near lower critical solution temperature in ternary aqueous solutions".Macromolecules 50.18(2017):7291-7298. |
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