Institutional Repository of Radio Astronomy Research Laboratory
| Role of hydrogen bonding in solubility of poly(N-isopropylacrylamide) brushes in sodium halide solutions | |
Zhao, Xin-Jun1,2,3; Gao, Zhi-Fu4
| |
| 2016-07-01 | |
| Source Publication | CHINESE PHYSICS B
 |
| ISSN | 1674-1056 |
| Volume | 25Issue:7Pages:074703 |
| Abstract | 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. |
| Correspondent Email | zhaoxinjunzxj@163.com |
| Keyword | Molecular Theory Pnipam Brushes Anion Effect Hydrogen Bonds |
| Subtype | Article |
| DOI | 10.1088/1674-1056/25/7/074703 |
| WOS Headings | Science & Technology ; Physical Sciences |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | CRITICAL SOLUTION TEMPERATURE ; TETHERED POLYMER LAYERS ; COIL-GLOBULE TRANSITION ; WATER-METHANOL MIXTURES ; HOFMEISTER SERIES ; ION SPECIFICITY ; THERMORESPONSIVE POLYMER ; PROTEIN ADSORPTION ; AQUEOUS-SOLUTIONS ; PHASE-TRANSITION |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000384225800028 |
| Funding Organization | National Natural Science Foundation of China(21264016 ; Joint Funds of Xinjiang Natural Science Foundation, China(2015211C298) ; 11464047 ; 21364016) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/1416 |
| Collection | 射电天文研究室_脉冲星研究团组 射电天文研究室 |
| Corresponding Author | Zhao, Xin-Jun |
| Affiliation | 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 |
| Recommended Citation 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):074703. |
| 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),074703. |
| 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):074703. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Zhao-2016-Role of hy（308KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment