Oil-induced aggregation of block copolymer in aqueous solution
文献类型：期刊论文
| 作者 | Ma, Jun-he; Wang, Yun; Guo, Chen; Liu, Hui-zhou; Tang, Ya-lin; Bahadur, Pratap |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2007-09-27 |
| 卷号 | 111期号:38页码:11140-11148 |
| 关键词 | angle neutron-scattering differential scanning calorimetry triblock copolymer micellar structure h-1-nmr spectroscopy light-scattering sodium-chloride phase-diagrams water solution micellization |
| ISSN号 | 1520-6106 |
| 其他题名 | J. Phys. Chem. B |
| 中文摘要 | The oil-induced aggregation behavior of PEO-PPO-PEO Pluronic P84 [(EO)(19)(PO)(39)(EO)(19)] in aqueous solutions has been systematically investigated by H-1 NMR spectroscopy, freeze-fracture transmission electron microscopy (FF-TEM), and dynamic light scattering (DLS). The critical micellization temperature (CMT) for P84 in the presence of oils decreases with increasing oil concentration. The effectiveness of various oils in decreasing the CMT of block copolymer follows the order m-xylene (C8H10) > toluene (C7H8) > benzene (C6H6) > n-octane (C8H18) > n-hexane (C6H14) approximate to cyclohexane (C6H12). It was found that the amount of anhydrous PO methyl groups increases whereas the amount of hydrated PO methyl groups decreases upon the addition of oils. At low oil concentration, the oil molecules are entrapped by the micellar core, but as the oil concentration increases above a certain value, the micellar core swells significantly as a result of the penetrated oil molecules, and much larger aggregates are formed. Intermolecular rotating-frame nuclear Overhauser effect (ROE) measurements between P84 and benzene were performed at 10 and 40 degrees C. The specific interaction between benzene and the methyl groups of PPO was determined, and it was observed that the interaction site remained unchanged as the temperature was increased. |
| 英文摘要 | The oil-induced aggregation behavior of PEO-PPO-PEO Pluronic P84 [(EO)(19)(PO)(39)(EO)(19)] in aqueous solutions has been systematically investigated by H-1 NMR spectroscopy, freeze-fracture transmission electron microscopy (FF-TEM), and dynamic light scattering (DLS). The critical micellization temperature (CMT) for P84 in the presence of oils decreases with increasing oil concentration. The effectiveness of various oils in decreasing the CMT of block copolymer follows the order m-xylene (C8H10) > toluene (C7H8) > benzene (C6H6) > n-octane (C8H18) > n-hexane (C6H14) approximate to cyclohexane (C6H12). It was found that the amount of anhydrous PO methyl groups increases whereas the amount of hydrated PO methyl groups decreases upon the addition of oils. At low oil concentration, the oil molecules are entrapped by the micellar core, but as the oil concentration increases above a certain value, the micellar core swells significantly as a result of the penetrated oil molecules, and much larger aggregates are formed. Intermolecular rotating-frame nuclear Overhauser effect (ROE) measurements between P84 and benzene were performed at 10 and 40 degrees C. The specific interaction between benzene and the methyl groups of PPO was determined, and it was observed that the interaction site remained unchanged as the temperature was increased. |
| 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 ; DIFFERENTIAL SCANNING CALORIMETRY ; TRIBLOCK COPOLYMER ; MICELLAR STRUCTURE ; H-1-NMR SPECTROSCOPY ; LIGHT-SCATTERING ; SODIUM-CHLORIDE ; PHASE-DIAGRAMS ; WATER SOLUTION ; MICELLIZATION |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000249655800008 |
| 公开日期 | 2013-10-15 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3411]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Grad Univ, Inst Proc Engn, Lab Separat Sci & Engn,State Key Lab Biochem Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Jun-he,Wang, Yun,Guo, Chen,et al. Oil-induced aggregation of block copolymer in aqueous solution[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2007,111(38):11140-11148. |
| APA | Ma, Jun-he,Wang, Yun,Guo, Chen,Liu, Hui-zhou,Tang, Ya-lin,&Bahadur, Pratap.(2007).Oil-induced aggregation of block copolymer in aqueous solution.JOURNAL OF PHYSICAL CHEMISTRY B,111(38),11140-11148. |
| MLA | Ma, Jun-he,et al."Oil-induced aggregation of block copolymer in aqueous solution".JOURNAL OF PHYSICAL CHEMISTRY B 111.38(2007):11140-11148. |
入库方式： OAI收割
来源：过程工程研究所
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