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Effect of ionic liquids on the aggregation behavior of PEO-PPO-PEO block copolymers in aqueous solution
Alternative TitleJ. Phys. Chem. B
Zheng, Lily; Guo, Chen; Wang, Jing; Liang, Xiangfeng; Chen, Shu; Ma, Junhe; Yang, Bin; Jiang, Yangyang; Liu, Huizhou
2007-02-15
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume111Issue:6Pages:1327-1333
AbstractEffect of 1-butyl-3-methyl-imidazolium bromide (BmimBr) on the aggregation behavior of PEO-PPO-PEO Pluronic P104 aqueous solution was studied by Fourier transform infrared (FTIR) spectroscopy, freeze fracture transmission electron microscopy (FF-TEM), dynamic light scattering (DLS), and NMR spectroscopy. When the BmimBr concentration was below 1.232 mol/L, the critical micelle temperature (CMT) of Pluronic P104 remained constant, while the size of micelles increased with increasing the BmimBr concentration; above this concentration, the CMT of Pluronic P104 decreased abruptly, and bigger clusters of BmimBr were formed. The selective nuclear Overhauser effect (NOE) spectrum indicates that the PO block of the P104 interacts with the butyl group of the Bmim(+) cation by hydrophobic interaction. It suggests that when the concentration of BmimBr is below 1.232 mol/L, there are P104 micelles in the aqueous solution with BmimBr embedding to the micellar core, while above this concentration, P104 micelles and BmimBr clusters coexist in the system.; Effect of 1-butyl-3-methyl-imidazolium bromide (BmimBr) on the aggregation behavior of PEO-PPO-PEO Pluronic P104 aqueous solution was studied by Fourier transform infrared (FTIR) spectroscopy, freeze fracture transmission electron microscopy (FF-TEM), dynamic light scattering (DLS), and NMR spectroscopy. When the BmimBr concentration was below 1.232 mol/L, the critical micelle temperature (CMT) of Pluronic P104 remained constant, while the size of micelles increased with increasing the BmimBr concentration; above this concentration, the CMT of Pluronic P104 decreased abruptly, and bigger clusters of BmimBr were formed. The selective nuclear Overhauser effect (NOE) spectrum indicates that the PO block of the P104 interacts with the butyl group of the Bmim(+) cation by hydrophobic interaction. It suggests that when the concentration of BmimBr is below 1.232 mol/L, there are P104 micelles in the aqueous solution with BmimBr embedding to the micellar core, while above this concentration, P104 micelles and BmimBr clusters coexist in the system.
KeywordDifferential Scanning Calorimetry Triblock Copolymer Salt Micellization 1-butyl-3-methylimidazolium Extraction Complexes Precursor Poloxamer Chloride
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1021/jp066727c
URL查看原文
Indexed BySCI
Language英语
WOS KeywordDIFFERENTIAL SCANNING CALORIMETRY ; TRIBLOCK COPOLYMER ; SALT ; MICELLIZATION ; 1-BUTYL-3-METHYLIMIDAZOLIUM ; EXTRACTION ; COMPLEXES ; PRECURSOR ; POLOXAMER ; CHLORIDE
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000244039700012
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Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/3532
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Lab Separat Sci & Engn, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Zheng, Lily,Guo, Chen,Wang, Jing,et al. Effect of ionic liquids on the aggregation behavior of PEO-PPO-PEO block copolymers in aqueous solution[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2007,111(6):1327-1333.
APA Zheng, Lily.,Guo, Chen.,Wang, Jing.,Liang, Xiangfeng.,Chen, Shu.,...&Liu, Huizhou.(2007).Effect of ionic liquids on the aggregation behavior of PEO-PPO-PEO block copolymers in aqueous solution.JOURNAL OF PHYSICAL CHEMISTRY B,111(6),1327-1333.
MLA Zheng, Lily,et al."Effect of ionic liquids on the aggregation behavior of PEO-PPO-PEO block copolymers in aqueous solution".JOURNAL OF PHYSICAL CHEMISTRY B 111.6(2007):1327-1333.
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