Role of hydrogen bonding in solubility of poly(N-isopropylacrylamide) brushes in sodium halide solutions
文献类型：期刊论文
| 作者 | Zhao, Xin-Jun1,2,3; Gao, Zhi-Fu4
|
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2016-07-01 |
| 卷号 | 25期号:7 |
| 关键词 | molecular theory PNIPAM brushes anion effect hydrogen bonds |
| ISSN号 | 1674-1056 |
| 英文摘要 | By employing molecular theory, we systematically investigate the shift of solubility of poly(N-isopropylacrylamide) (PNIPAM) brushes in sodium halide solutions. After considering PNIPAM-water hydrogen bonds, water-anion hydrogen bonds, and PNIPAM-anion bonds and their explicit coupling to the PNIPAM conformations, we find that increasing temperature lowers the solubility of PNIPAM, and results in a collapse of the layer at high enough temperatures. The combination of the three types of bonds would yield a decrease in the solubility of PNIPAM following the Hofmeister series: NaCl>NaBr>NaI. PNIPAM-water hydrogen bonds are affected by water-anion hydrogen bonds and PNIPAM-anion bonds. The coupling of polymer conformations and the competition among the three types of bonds are essential for describing correctly a decrease in the solubility of PNIPAM brushes, which is determined by the free energy associated with the formation of the three types of bonds. Our results agree well with the experimental observations, and would be very important for understanding the shift of the lower critical solution temperature of PNIPAM brushes following the Hofmeister series. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | CRITICAL SOLUTION TEMPERATURE ; TETHERED POLYMER LAYERS ; COIL-GLOBULE TRANSITION ; WATER-METHANOL MIXTURES ; HOFMEISTER SERIES ; ION SPECIFICITY ; THERMORESPONSIVE POLYMER ; PROTEIN ADSORPTION ; AQUEOUS-SOLUTIONS ; PHASE-TRANSITION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000384225800028 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/1416]  |
| 专题 | 脉冲星研究团组 新疆天文台_射电天文研究室 |
| 作者单位 | 1.YiLi Normal Univ, Xinjiang Lab Phase Transit & Microstruct Condense, Yining 835000, Peoples R China 2.Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China 3.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Xin-Jun,Gao, Zhi-Fu. Role of hydrogen bonding in solubility of poly(N-isopropylacrylamide) brushes in sodium halide solutions[J]. CHINESE PHYSICS B,2016,25(7). |
| APA | Zhao, Xin-Jun,&Gao, Zhi-Fu.(2016).Role of hydrogen bonding in solubility of poly(N-isopropylacrylamide) brushes in sodium halide solutions.CHINESE PHYSICS B,25(7). |
| MLA | Zhao, Xin-Jun,et al."Role of hydrogen bonding in solubility of poly(N-isopropylacrylamide) brushes in sodium halide solutions".CHINESE PHYSICS B 25.7(2016). |
入库方式： OAI收割
来源：新疆天文台
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