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Urea-induced demicellization of Pluronic L64 in water
Bharatiya, B.1; Guo, C.2; Ma, J. H.2; Kubota, O.3; Nakashima, K.3; Bahadur, P.1
2009
Source PublicationCOLLOID AND POLYMER SCIENCE
ISSN0303-402X
Volume287Issue:1Pages:63-71
AbstractThe micellar behavior of a polyethylene oxide block-polypropylene oxide block-polyethylene oxide copolymer Pluronic L64 in aqueous urea solutions (urea concentrations 0, 1, 2, 3, 4, and 6 M) by physical methods, viz. cloud point and viscosity, spectral techniques (Fourier transform infrared, fluorescence, and nuclear magnetic resonance), differential scanning calorimetry, and dynamic light scattering is reported. The presence of urea causes an increase in the clouding temperature, critical micellization temperature, and the structural transition (spherical micelles to ellipsoid/rod) temperature; different methods showed good agreement. Urea induces demicellization of L64, enhancing accumulation of water molecules surrounding micelles. L64 micelles show growth at high temperatures, but this micellar transition is suppressed by urea, as proven by calorimetric and viscometric methods. The results are discussed in terms of the molecular mechanism underlying the effects of urea.
KeywordDemicellization Critical Micellization Temperature (Cmt) Aggregation Number
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s00396-008-1953-4
Indexed BySCI
Language英语
WOS KeywordOXIDE) TRIBLOCK COPOLYMER ; BLOCK-COPOLYMER ; AGGREGATION BEHAVIOR ; AQUEOUS-SOLUTIONS ; NONIONIC SURFACTANTS ; MICELLE TRANSITION ; MICELLIZATION ; HYDROCARBONS ; SPECTROSCOPY ; DENATURANTS
WOS Research AreaChemistry ; Polymer Science
WOS SubjectChemistry, Physical ; Polymer Science
WOS IDWOS:000261951500008
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19221
Collection研究所(批量导入)
Affiliation1.Veer Narmad S Gujarat Univ, Dept Chem, Surat 395007, India
2.CAS, Inst Proc, State Key Lab Biochem Engn, Lab Separat Sci & Engn, Beijing, Peoples R China
3.Saga Univ Honjo, Fac Sci & Engn, Dept Chem, Saga 8408502, Japan
Recommended Citation
GB/T 7714
Bharatiya, B.,Guo, C.,Ma, J. H.,et al. Urea-induced demicellization of Pluronic L64 in water[J]. COLLOID AND POLYMER SCIENCE,2009,287(1):63-71.
APA Bharatiya, B.,Guo, C.,Ma, J. H.,Kubota, O.,Nakashima, K.,&Bahadur, P..(2009).Urea-induced demicellization of Pluronic L64 in water.COLLOID AND POLYMER SCIENCE,287(1),63-71.
MLA Bharatiya, B.,et al."Urea-induced demicellization of Pluronic L64 in water".COLLOID AND POLYMER SCIENCE 287.1(2009):63-71.
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