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Ye X, Lu Y, Liu S, Zhang G, Wu C. Ultrafast infrared heating laser pulse-induced micellization kinetics of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) in water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10366-71. [PMID: 17705518 DOI: 10.1021/la701626k] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The heating-induced micellization of poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (Pluronic PE10300) triblock copolymer chains was studied by ultrasensitive differential scanning calorimetry, laser light scattering, and fluorescence spectrometry with a fluorescent probe, 8-anilino-1-naphthalenesulfonic acid ammonium salt. The critical micellization temperatures obtained from the three methods are similar. The micellization kinetics was studied in terms of changes in the fluorescence and Rayleigh scattering intensities after an ultrafast infrared heating laser pulse (approximately 10 ns)-induced temperature jump. The increases in the fluorescence and Rayleigh scattering intensities in the millisecond range can be well described by a single-exponential equation, corresponding to the incorporation of individual triblock copolymer chains (unimers) into large spherical micelles. The increase in copolymer concentration or the initial solution temperature decreases the characteristic transition time. In general, the fluorescence measurement has a better signal-to-noise ratio but leads to a transition time that is slightly shorter than that from the corresponding Rayleigh scattering measurement for a given copolymer solution.
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Affiliation(s)
- Xiaodong Ye
- The Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Armstrong J, Chowdhry B, Mitchell J, Beezer A, Leharne S. Effect of Cosolvents and Cosolutes upon Aggregation Transitions in Aqueous Solutions of the Poloxamer F87 (Poloxamer P237): A High Sensitivity Differential Scanning Calorimetry Study. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp951390s] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jonathan Armstrong
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - Babur Chowdhry
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - John Mitchell
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - Anthony Beezer
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - Stephen Leharne
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
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