H-1 NMR spectroscopic investigations on the micellization and gelation of PEO-PPO-PEO block copolymers in aqueous solutions
文献类型：期刊论文
| 作者 | Ma, Jun-He; Guo, Chen; Tang, Ya-Lin; Liu, Hui-Zhou |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2007-09-11 |
| 卷号 | 23期号:19页码:9596-9605 |
| 关键词 | angle neutron-scattering oxide) triblock copolymers poly(propylene oxide) poly(ethylene oxide) micelle formation phase-behavior aggregation behavior nmr-spectroscopy lattice theory pluronic l64 |
| ISSN号 | 0743-7463 |
| 其他题名 | Langmuir |
| 中文摘要 | The effects of temperature, polymer composition, and concentration on the micellization and gelation properties of poly(ethylene oxide) -poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers in aqueous solutions were investigated by H-1 NMR spectroscopy. It was found that the temperature-dependent behavior of PPO blocks, observed as changes in chemical shift, half-height width, and integral value, could be attributed as an intrinsic tool to characterize the transition states during unimer to micelle formation. The H-1 NMR spectral analysis revealed that the hydrophobic part, PPO, of the Pluronic polymers plays a more significant role in the temperature-induced micellization, whereas the transitional behavior of Pluronic polymer, i.e., from micellization to liquid crystals formation, resulted in the drastic broadening of the spectral signals for the PEO, indicating that the PEO segments play a more significant role in the crystallization process. It was also observed that the temperature-dependent changes in the half-height width of the PEO -CH2- signal are sensitive to the liquid crystalline phase formation, which could be attributed to the close packing of spherical micelles at high polymer concentrations or temperatures. |
| 英文摘要 | The effects of temperature, polymer composition, and concentration on the micellization and gelation properties of poly(ethylene oxide) -poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers in aqueous solutions were investigated by H-1 NMR spectroscopy. It was found that the temperature-dependent behavior of PPO blocks, observed as changes in chemical shift, half-height width, and integral value, could be attributed as an intrinsic tool to characterize the transition states during unimer to micelle formation. The H-1 NMR spectral analysis revealed that the hydrophobic part, PPO, of the Pluronic polymers plays a more significant role in the temperature-induced micellization, whereas the transitional behavior of Pluronic polymer, i.e., from micellization to liquid crystals formation, resulted in the drastic broadening of the spectral signals for the PEO, indicating that the PEO segments play a more significant role in the crystallization process. It was also observed that the temperature-dependent changes in the half-height width of the PEO -CH2- signal are sensitive to the liquid crystalline phase formation, which could be attributed to the close packing of spherical micelles at high polymer concentrations or temperatures. |
| 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] | ANGLE NEUTRON-SCATTERING ; OXIDE) TRIBLOCK COPOLYMERS ; POLY(PROPYLENE OXIDE) ; POLY(ETHYLENE OXIDE) ; MICELLE FORMATION ; PHASE-BEHAVIOR ; AGGREGATION BEHAVIOR ; NMR-SPECTROSCOPY ; LATTICE THEORY ; PLURONIC L64 |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000249241300016 |
| 公开日期 | 2013-10-15 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3407]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Grad Univ Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Lab Separt Sci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Jun-He,Guo, Chen,Tang, Ya-Lin,et al. H-1 NMR spectroscopic investigations on the micellization and gelation of PEO-PPO-PEO block copolymers in aqueous solutions[J]. LANGMUIR,2007,23(19):9596-9605. |
| APA | Ma, Jun-He,Guo, Chen,Tang, Ya-Lin,&Liu, Hui-Zhou.(2007).H-1 NMR spectroscopic investigations on the micellization and gelation of PEO-PPO-PEO block copolymers in aqueous solutions.LANGMUIR,23(19),9596-9605. |
| MLA | Ma, Jun-He,et al."H-1 NMR spectroscopic investigations on the micellization and gelation of PEO-PPO-PEO block copolymers in aqueous solutions".LANGMUIR 23.19(2007):9596-9605. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。