Mechanism of PEO-PPO-PEO micellization in aqueous solutions studied by two-dimensional correlation FTIR spectroscopy
文献类型：期刊论文
| 作者 | Jia, Lianwei1; Guo, Chen1; Yang, Liangrong1; Xiang, Junfeng2; Tang, Yalin2; Liu, Chunzhao1; Liu, Huizhou1 |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2010-05-15 |
| 卷号 | 345期号:2页码:332-337 |
| 关键词 | Pluronic Block Copolymer Micellization 2d Ftir |
| ISSN号 | 0021-9797 |
| DOI | 10.1016/j.jcis.2010.01.060 |
| 英文摘要 | The micellization mechanism of PEO-PPO-PEO block copolymer in aqueous solutions was studied by two-dimensional correlation FTIR spectroscopy. The 1400-1000 cm(-1) region was investigated, involving the stretching vibrations of ether band, C-H wagging vibrations of EO methylene groups and C-H symmetric deformation vibrations of PO methyl groups. In the 2D correlated spectra, the hydrous and anhydrous state of the ether band, PO methyl groups, and the two conformations of EO methylene groups were observed. Molecules with different PO lengths and increasing molecular weight were investigated to determine the sequence of association of the separate groups. During temperature-induced micellization, the following changes were detected: firstly, EO methylene groups changed from a gauche state to a trans state; secondly, conformational transitions led to the dehydration of hydrated methyl groups; next, the hydrogen bonding between C-O band and water diminished; and finally, dehydrated groups approached to form hydrophobic cores, resulting in micelle formation. From this variation in the sequence of group associations, it is concluded that aggregates of unimers first formed, then hydrophobic cores formed through the hydrophobic interaction from dehydrated PPO blocks, and proper micelles eventually evolved. The temperature-induced conformational changes are suggested the reason for micellization. (C) 2010 Elsevier Inc. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000276729200030 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/69707]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Guo, Chen |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Lianwei,Guo, Chen,Yang, Liangrong,et al. Mechanism of PEO-PPO-PEO micellization in aqueous solutions studied by two-dimensional correlation FTIR spectroscopy[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2010,345(2):332-337. |
| APA | Jia, Lianwei.,Guo, Chen.,Yang, Liangrong.,Xiang, Junfeng.,Tang, Yalin.,...&Liu, Huizhou.(2010).Mechanism of PEO-PPO-PEO micellization in aqueous solutions studied by two-dimensional correlation FTIR spectroscopy.JOURNAL OF COLLOID AND INTERFACE SCIENCE,345(2),332-337. |
| MLA | Jia, Lianwei,et al."Mechanism of PEO-PPO-PEO micellization in aqueous solutions studied by two-dimensional correlation FTIR spectroscopy".JOURNAL OF COLLOID AND INTERFACE SCIENCE 345.2(2010):332-337. |
入库方式： OAI收割
来源：化学研究所
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