Influence of 1-pentanol on the micellization of poly(ethylene oxide)-polypropylene oxide)-polyethylene oxide) block copolymers in aqueous solutions
文献类型：期刊论文
| 作者 | Su, YL; Wei, XF; Liu, HZ |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2003-04-01 |
| 卷号 | 19期号:7页码:2995-3000 |
| 关键词 | angle neutron-scattering differential scanning calorimetry sodium dodecyl-sulfate peo triblock copolymer micelle formation structural-properties aggregation behavior fluorescence probe ftir spectroscopy phase-diagrams |
| ISSN号 | 0743-7463 |
| 其他题名 | Langmuir |
| 中文摘要 | The critical micellization temperature (CMT) of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers in water has been determined by using the temperature-dependent fluorescence intensity of pyrene. The CMT of Pluronic polymers in aqueous solutions is decreased by the addition of 1-pentanol. The thermodynamic parameters of micellization are obtained from the temperature derivatives of the ln(X-CMC) (CMC = critical micellization concentration) values. The standard enthalpy and entropy of micellization for Pluronic polymers in water are increased with an increase of the 1-pentanol content. The more PEO component in the Pluronic polymer, the higher the changed values of micellization enthalpy and entropy. The solubilization of 1-pentanol in the micelles was used to explain the relationship between the changed values of thermodynamic parameters of micellization and the composition of Pluronic polymers, in which the water in the micellar cores is replaced by the solubilized 1-pentanol. The I-1/I-3 ratio of pyrene in aqueous Pluronic polymer solutions at temperatures below the CMT is decreased with an increase of the 1-pentanol concentration. A less polar microenvironment will be formed in the regions of unexpanded PPO coils when more 1-pentanol is added to the aqueous Pluronic polymer solution. The decrease of PPO solubility will result in the shift of CMT toward lower temperature. |
| 英文摘要 | The critical micellization temperature (CMT) of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers in water has been determined by using the temperature-dependent fluorescence intensity of pyrene. The CMT of Pluronic polymers in aqueous solutions is decreased by the addition of 1-pentanol. The thermodynamic parameters of micellization are obtained from the temperature derivatives of the ln(X-CMC) (CMC = critical micellization concentration) values. The standard enthalpy and entropy of micellization for Pluronic polymers in water are increased with an increase of the 1-pentanol content. The more PEO component in the Pluronic polymer, the higher the changed values of micellization enthalpy and entropy. The solubilization of 1-pentanol in the micelles was used to explain the relationship between the changed values of thermodynamic parameters of micellization and the composition of Pluronic polymers, in which the water in the micellar cores is replaced by the solubilized 1-pentanol. The I-1/I-3 ratio of pyrene in aqueous Pluronic polymer solutions at temperatures below the CMT is decreased with an increase of the 1-pentanol concentration. A less polar microenvironment will be formed in the regions of unexpanded PPO coils when more 1-pentanol is added to the aqueous Pluronic polymer solution. The decrease of PPO solubility will result in the shift of CMT toward lower temperature. |
| 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 ; DIFFERENTIAL SCANNING CALORIMETRY ; SODIUM DODECYL-SULFATE ; PEO TRIBLOCK COPOLYMER ; MICELLE FORMATION ; STRUCTURAL-PROPERTIES ; AGGREGATION BEHAVIOR ; FLUORESCENCE PROBE ; FTIR SPECTROSCOPY ; PHASE-DIAGRAMS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000181980900064 |
| 公开日期 | 2013-11-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5300]  |
| 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 Scientist Lab Separat Sci & Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, YL,Wei, XF,Liu, HZ. Influence of 1-pentanol on the micellization of poly(ethylene oxide)-polypropylene oxide)-polyethylene oxide) block copolymers in aqueous solutions[J]. LANGMUIR,2003,19(7):2995-3000. |
| APA | Su, YL,Wei, XF,&Liu, HZ.(2003).Influence of 1-pentanol on the micellization of poly(ethylene oxide)-polypropylene oxide)-polyethylene oxide) block copolymers in aqueous solutions.LANGMUIR,19(7),2995-3000. |
| MLA | Su, YL,et al."Influence of 1-pentanol on the micellization of poly(ethylene oxide)-polypropylene oxide)-polyethylene oxide) block copolymers in aqueous solutions".LANGMUIR 19.7(2003):2995-3000. |
入库方式： OAI收割
来源：过程工程研究所
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