Study of salt effects on the micellization of PEO-PPO-PEO block copolymer in aqueous solution by FTIR spectroscopy
文献类型：期刊论文
| 作者 | Su, YL; Liu, HZ; Wang, J; Chen, JY |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2002-02-05 |
| 卷号 | 18期号:3页码:865-871 |
| 关键词 | oxide) triblock copolymers angle neutron-scattering temperature-dependent micellization differential scanning calorimetry poly(ethylene oxide) micelle formation propylene-oxide ethylene-oxide water-system aggregation behavior |
| ISSN号 | 0743-7463 |
| 其他题名 | Langmuir |
| 中文摘要 | The micellization of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymer in aqueous solution in the absence and presence of salts was studied by Fourier transform infrared (FTIR) spectroscopy. The temperature-dependent changes of the C-O-C stretching vibration band were used to denote critical micellization temperatures (CMT). The CMT of Pluronic F127 in aqueous solution was modified significantly by the addition of salts as previously shown. The proportion of the anhydrous methyl groups was increased, while the proportion of the hydrated methyl groups was decreased during the micellization process. The dehydration of the Pluronic F127 ether backbone in the micellization process could also be inferred by the FTIR spectral data from a shift of the frequency of the C-O-C stretching band toward higher wavenumbers and broadening of the bandwidth of the C-O-C stretching band. The salt influence on the bandwidth is stronger than that on the wavenumber for the C-O-C stretching vibration. The microenvironmental difference between the PPO and PEO blocks of the copolymer is smaller in aqueous KBr solution than in other types of salt solutions. It was also found that part of the PEO segments of Pluronic F127 in aqueous salt solutions are in the crystalline state. |
| 英文摘要 | The micellization of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymer in aqueous solution in the absence and presence of salts was studied by Fourier transform infrared (FTIR) spectroscopy. The temperature-dependent changes of the C-O-C stretching vibration band were used to denote critical micellization temperatures (CMT). The CMT of Pluronic F127 in aqueous solution was modified significantly by the addition of salts as previously shown. The proportion of the anhydrous methyl groups was increased, while the proportion of the hydrated methyl groups was decreased during the micellization process. The dehydration of the Pluronic F127 ether backbone in the micellization process could also be inferred by the FTIR spectral data from a shift of the frequency of the C-O-C stretching band toward higher wavenumbers and broadening of the bandwidth of the C-O-C stretching band. The salt influence on the bandwidth is stronger than that on the wavenumber for the C-O-C stretching vibration. The microenvironmental difference between the PPO and PEO blocks of the copolymer is smaller in aqueous KBr solution than in other types of salt solutions. It was also found that part of the PEO segments of Pluronic F127 in aqueous salt solutions are in the crystalline state. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Materials Science |
| 关键词[WOS] | OXIDE) TRIBLOCK COPOLYMERS ; ANGLE NEUTRON-SCATTERING ; TEMPERATURE-DEPENDENT MICELLIZATION ; DIFFERENTIAL SCANNING CALORIMETRY ; POLY(ETHYLENE OXIDE) ; MICELLE FORMATION ; PROPYLENE-OXIDE ; ETHYLENE-OXIDE ; WATER-SYSTEM ; AGGREGATION BEHAVIOR |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000173646300042 |
| 公开日期 | 2013-11-12 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5642]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Chem Met, State Key Lab Biochem Engn, Young Scientist Lab Separat Sci & Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, YL,Liu, HZ,Wang, J,et al. Study of salt effects on the micellization of PEO-PPO-PEO block copolymer in aqueous solution by FTIR spectroscopy[J]. LANGMUIR,2002,18(3):865-871. |
| APA | Su, YL,Liu, HZ,Wang, J,&Chen, JY.(2002).Study of salt effects on the micellization of PEO-PPO-PEO block copolymer in aqueous solution by FTIR spectroscopy.LANGMUIR,18(3),865-871. |
| MLA | Su, YL,et al."Study of salt effects on the micellization of PEO-PPO-PEO block copolymer in aqueous solution by FTIR spectroscopy".LANGMUIR 18.3(2002):865-871. |
入库方式： OAI收割
来源：过程工程研究所
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