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Interactions of 2,2,2-trifluoroethanol with aqueous micelles of Triton X-100

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Abstract.
The effect of 2,2,2-trifluoroethanol (TFE) on micellar properties of Triton X-100 (TX-100) in aqueous
solutions was investigated by cloud point (CP), viscosity, surface tension, and fluorescence techniques.
The critical micelle concentration (CMC) values of the corresponding mixtures were obtained by the
pyrene 1:3 ratio method and by surface tension data using the pendant drop technique. All the techniques
provided about the same values for the CMC. Up to 0.83 M TFE increased the CMC by 30%. The small
increase in the CMC is consistent with a slight increase in the solubility of the TX-100. Fluorescence
measurements indicate that the TFE decreased the aggregation number by about 30%. The CP decrease
and the intrinsic viscosity increase with TFE concentration are consistent with a preferential interaction
of TFE with TX-100 micelles. TFE molecules form hydrophobic domains in the micellar layer palisade
because they hydrogen bond with the oxyethylene group in TX-100. The intrinsic viscosity data are
consistent with an increase in micelle hydrodynamic radius owing to the presence of TFE.

Keywords:
Triton X-100
TFE interactions
Micelles
Cloud point
Viscosity
Fluorescence
Surface tension
Pendant drop

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 330 (2009) 163–169

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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