Phase Transition and Preferential Alcohol Adsorption of Poly(N,N-diethylacrylamide) Gel in Water/Alcohol Mixtures
文献类型：期刊论文
| 作者 | Liu, Biaolan1,2; Wang, Jian1,2; Ru, Geying1; Liu, Chaoyang1; Feng, Jiwen1 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2015-02-24 |
| 卷号 | 48期号:4页码:1126-1133 |
| 英文摘要 | The phase separation of poly(N,N-diethylacrylamide) (PDEA) gel network in water/alcohol (methanol, ethanol, isopropanol, and n-propanol) mixtures has been systematically investigated by variable-temperature high-resolution H-1 MAS NMR. The PDEA gel exhibits the cononsolvency effect and reentrant phase transition in water/isopropanol and water/n-propanol mixtures with larger alcohol hydrophobic groups but not in the water/methanol and water/ethanol bearing smaller alcohol hydrophobic groups, in contrast to the case of poly(N-isopropylacrylamide) where the cononsolvency effect was observed in all water/alcohol solutions. In the present PDEA gel, the phase separation is characterized by dehydration of the hydrophobic alkyl groups of PDEA, resulting in two distinct types of water/alcohol solutions above the lower critical solution temperature: confined binary solvents (3-5 solvent molecules per PDEA repeating unit) inside the gel network and free binary solvents outside the gel. The alcohol concentration in confined mixture solvents is markedly higher than that in free mixture solvents and increases with increasing hydrophobicity of the alcohol moiety. Interestingly, the alcohol enrichment inside the shrunk network does not cause additional dehydration of the PDEA network. Besides, the side chain mobility of shrunk PDEA gel network is enhanced by the appearance of alcohol and increases with the hydrophobicity of alcohol moiety. Our results reveal that there exists a strong interaction between alcohol and gel network. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Polymer Science |
| 研究领域[WOS] | Polymer Science |
| 关键词[WOS] | TO-COIL TRANSITION ; AQUEOUS-SOLUTIONS ; WATER/METHANOL MIXTURES ; N-ISOPROPYLACRYLAMIDE ; MOLECULAR-DYNAMICS ; MIXED-SOLVENTS ; POLY(N-ISOPROPYLACRYLAMIDE) ; WATER ; CONONSOLVENCY ; TEMPERATURE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000350193900027 |
| 公开日期 | 2015-07-14 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/1039]  |
| 专题 | 武汉物理与数学研究所_磁共振应用研究部 |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, Natl Ctr Magnet Resonance Wuhan, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Biaolan,Wang, Jian,Ru, Geying,et al. Phase Transition and Preferential Alcohol Adsorption of Poly(N,N-diethylacrylamide) Gel in Water/Alcohol Mixtures[J]. MACROMOLECULES,2015,48(4):1126-1133. |
| APA | Liu, Biaolan,Wang, Jian,Ru, Geying,Liu, Chaoyang,&Feng, Jiwen.(2015).Phase Transition and Preferential Alcohol Adsorption of Poly(N,N-diethylacrylamide) Gel in Water/Alcohol Mixtures.MACROMOLECULES,48(4),1126-1133. |
| MLA | Liu, Biaolan,et al."Phase Transition and Preferential Alcohol Adsorption of Poly(N,N-diethylacrylamide) Gel in Water/Alcohol Mixtures".MACROMOLECULES 48.4(2015):1126-1133. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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