Formation of a hydrophobic microenvironment in aqueous PEO-PPO-PEO block copolymer solutions investigated by Fourier transform infrared spectroscopy
文献类型：期刊论文
| 作者 | Su, Y; Wang, J; Liu, H |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2002-11-14 |
| 卷号 | 106期号:45页码:11823-11828 |
| 关键词 | angle neutron-scattering temperature-dependent micellization glycol dodecyl ether poly(ethylene oxide) micelle formation ft-ir triblock copolymer phase-transitions aggregation behavior lattice theory |
| ISSN号 | 1520-6106 |
| 其他题名 | J. Phys. Chem. B |
| 中文摘要 | The application of Fourier transform infrared (FTIR) spectroscopy to the study of poly(ethylene oxide)poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymer is shown to give valuable information concerning the formation of a hydrophobic microenvironment in aqueous solutions. FTIR spectra of Pluronic P103 in H2O and D2O solutions were measured as a function of temperature. The temperature dependence of FTIR spectral data indicates that the methyl groups in PPO blocks of the polymer are experiencing a progressively less polar environment with an increase of temperature, and the strength of hydrogen bonds formed by the ether oxygen in PO groups with water is reduced by heat. The dehydration of PO segments favors the formation of a hydrophobic microenvironment in aqueous solutions. At higher temperatures, the appearance of the band of the dehydrated methyl groups in the FTIR spectra of aqueous Pluronic P103 solutions is related directly to the aggregation of PEO-PPO-PEO block copolymer and the formation of a hydrophobic microenvironment., The proportion of the dehydrated methyl groups increases with an increase of temperature; Pluronic P103 would form a micelle with a denser PPO core in aqueous solutions at higher temperatures. |
| 英文摘要 | The application of Fourier transform infrared (FTIR) spectroscopy to the study of poly(ethylene oxide)poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymer is shown to give valuable information concerning the formation of a hydrophobic microenvironment in aqueous solutions. FTIR spectra of Pluronic P103 in H2O and D2O solutions were measured as a function of temperature. The temperature dependence of FTIR spectral data indicates that the methyl groups in PPO blocks of the polymer are experiencing a progressively less polar environment with an increase of temperature, and the strength of hydrogen bonds formed by the ether oxygen in PO groups with water is reduced by heat. The dehydration of PO segments favors the formation of a hydrophobic microenvironment in aqueous solutions. At higher temperatures, the appearance of the band of the dehydrated methyl groups in the FTIR spectra of aqueous Pluronic P103 solutions is related directly to the aggregation of PEO-PPO-PEO block copolymer and the formation of a hydrophobic microenvironment., The proportion of the dehydrated methyl groups increases with an increase of temperature; Pluronic P103 would form a micelle with a denser PPO core in aqueous solutions at higher temperatures. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | ANGLE NEUTRON-SCATTERING ; TEMPERATURE-DEPENDENT MICELLIZATION ; GLYCOL DODECYL ETHER ; POLY(ETHYLENE OXIDE) ; MICELLE FORMATION ; FT-IR ; TRIBLOCK COPOLYMER ; PHASE-TRANSITIONS ; AGGREGATION BEHAVIOR ; LATTICE THEORY |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000179180400018 |
| 公开日期 | 2013-11-12 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5641]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Young Sci Lab Separat Sci & Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Y,Wang, J,Liu, H. Formation of a hydrophobic microenvironment in aqueous PEO-PPO-PEO block copolymer solutions investigated by Fourier transform infrared spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2002,106(45):11823-11828. |
| APA | Su, Y,Wang, J,&Liu, H.(2002).Formation of a hydrophobic microenvironment in aqueous PEO-PPO-PEO block copolymer solutions investigated by Fourier transform infrared spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY B,106(45),11823-11828. |
| MLA | Su, Y,et al."Formation of a hydrophobic microenvironment in aqueous PEO-PPO-PEO block copolymer solutions investigated by Fourier transform infrared spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY B 106.45(2002):11823-11828. |
入库方式： OAI收割
来源：过程工程研究所
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