Effect of phenol on the aggregation characteristics of an ethylene oxide-propylene oxide triblock copolymer P65 in aqueous solution
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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.author | Jitendrakumar, Mata | |
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dc.contributor.author | Majhi, P. R. | |
dc.contributor.author | Kubota, O. | |
dc.contributor.author | Khanal, A. | |
dc.contributor.author | Nakashima, K. | |
dc.contributor.author | Bahadur, P. | |
dc.date.accessioned | 2015-12-10T22:20:28Z | |
dc.identifier.issn | 0021-9797 | |
dc.identifier.uri | http://hdl.handle.net/1885/51935 | |
dc.description.abstract | 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 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.publisher | Academic Press | |
dc.source | Journal of Colloid and Interface Science | |
dc.subject | Keywords: 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.title | Effect of phenol on the aggregation characteristics of an ethylene oxide-propylene oxide triblock copolymer P65 in aqueous solution | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 320 | |
dc.date.issued | 2008 | |
local.identifier.absfor | 030603 - Colloid and Surface Chemistry | |
local.identifier.ariespublication | u4217927xPUB235 | |
local.type.status | Published Version | |
local.contributor.affiliation | Jitendrakumar, Mata, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Majhi, P R, University of California | |
local.contributor.affiliation | Kubota, O, Saga University | |
local.contributor.affiliation | Khanal, A, Saga University | |
local.contributor.affiliation | Nakashima, K, Saga University | |
local.contributor.affiliation | Bahadur, P, Veer Narmad South Gujarat University | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 1 | |
local.bibliographicCitation.startpage | 275 | |
local.bibliographicCitation.lastpage | 282 | |
local.identifier.doi | 10.1016/j.jcis.2007.12.033 | |
dc.date.updated | 2015-12-09T08:47:12Z | |
local.identifier.scopusID | 2-s2.0-39549117363 | |
Collections | ANU Research Publications |
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