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Effect of phenol on the aggregation characteristics of an ethylene oxide-propylene oxide triblock copolymer P65 in aqueous solution

Jitendrakumar, Mata; Majhi, P. R.; Kubota, O.; Khanal, A.; Nakashima, K.; Bahadur, P.

Description

The effects of phenol on the micellization, micellar growth, and phase separation of a poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) amphiphilic copolymer (Pluronic P65: EO19PO30EO19) in aqueous solution have been studied by cloud point, viscosity, dynamic light scattering (DLS), differential scanning calorimetry (DSC), fluorescence spectroscopy, and small-angle neutron scattering (SANS). Various concentrations of P65 have been chosen to estimate the...[Show more]

dc.contributor.authorJitendrakumar, Mata
dc.contributor.authorMajhi, P. R.
dc.contributor.authorKubota, O.
dc.contributor.authorKhanal, A.
dc.contributor.authorNakashima, K.
dc.contributor.authorBahadur, P.
dc.date.accessioned2015-12-10T22:20:28Z
dc.identifier.issn0021-9797
dc.identifier.urihttp://hdl.handle.net/1885/51935
dc.description.abstractThe effects of phenol on the micellization, micellar growth, and phase separation of a poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) amphiphilic copolymer (Pluronic P65: EO19PO30EO19) in aqueous solution have been studied by cloud point, viscosity, dynamic light scattering (DLS), differential scanning calorimetry (DSC), fluorescence spectroscopy, and small-angle neutron scattering (SANS). Various concentrations of P65 have been chosen to estimate the effect of phenol on different concentration regions of P65. Phenol interacts quite differently at low concentrations (0-2%) than at high concentrations (2-10%) of P65, as per the observation that phenol is more predominant at smaller concentrations of P65. A marked decrease in the cloud points of the P65 solutions is observed in presence of phenol. The critical micelle temperature (CMT) of P65 shows a synergistic effect of phenol on P65 aggregates. Micellar transitions, phase separation, and aggregation behaviours like micellization and micellar growth in the presence of phenol have been observed by combining viscometry, DLS, DSC, and CP. DLS shows that the effect of phenol is predominant at high temperatures. SANS shows a high increase in axial ratio and aggregation numbers in the presence of phenol at fixed concentrations of P65. Fluorescence data illustrate that addition of phenol makes micelles polar but at the same time its favours aggregation. Water-soluble phenol (present in low concentrations) forms aggregates with P65, which can be separated by cloud point extraction, making this study interesting for separation of phenol from the phenol-water system.
dc.publisherAcademic Press
dc.sourceJournal of Colloid and Interface Science
dc.subjectKeywords: Agglomeration; Block copolymers; Concentration (process); Ethylene; Fluorescence spectroscopy; Micellization; Propylene; Solutions; Cloud point extraction; Ethylene oxides; Micellar growth; Pluronics; Phenols; ethylene oxide; phenol; propylene oxide; arti Cloud point extraction; DSC; Fluorescence spectroscopy; Micellar aggregates; Phenol; Pluronics
dc.titleEffect of phenol on the aggregation characteristics of an ethylene oxide-propylene oxide triblock copolymer P65 in aqueous solution
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume320
dc.date.issued2008
local.identifier.absfor030603 - Colloid and Surface Chemistry
local.identifier.ariespublicationu4217927xPUB235
local.type.statusPublished Version
local.contributor.affiliationJitendrakumar, Mata, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMajhi, P R, University of California
local.contributor.affiliationKubota, O, Saga University
local.contributor.affiliationKhanal, A, Saga University
local.contributor.affiliationNakashima, K, Saga University
local.contributor.affiliationBahadur, P, Veer Narmad South Gujarat University
local.description.embargo2037-12-31
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage275
local.bibliographicCitation.lastpage282
local.identifier.doi10.1016/j.jcis.2007.12.033
dc.date.updated2015-12-09T08:47:12Z
local.identifier.scopusID2-s2.0-39549117363
CollectionsANU Research Publications

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