Abstract
We measured the surface tension of aqueous solutions of octanol-butandiyl-l,4-bis(decyldimethylammonium bromide) using the drop-volume technique at 298.15 K under atmospheric pressure as a function of the total molality and bulk composition. The results of the surface tension measurements, which were analyzed by originally developed thermodynamic equations, suggested that octanol molecules filled the spaces among the hydrophobic chains of gemini surfactants and formed a densely packed monolayer with them in the adsorbed film. The turbidity of aqueous solutions was also measured to construct the concentration-composition diagram with the surface tension data. A transmission electron microscope was used to determine the aggregate morphology in the aqueous solutions. Disc-like micelle and microemulsion regions were found on the diagram prior to the spherical micelle formation; nevertheless, the butandiy1-1,4-bis(decyldimethylammonium bromide) itself formed only spherical (or small ellipsoid) micelles in the concentration range measured. We also studied the relationship between synergism and molecular packing in the aggregates.
| Original language | English |
|---|---|
| Pages (from-to) | 8847-8853 |
| Number of pages | 7 |
| Journal | Journal of Physical Chemistry B |
| Volume | 113 |
| Issue number | 26 |
| DOIs | |
| Publication status | Published - Jul 2 2009 |
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All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry
Cite this
Surface adsorption and aggregate formation of cationic gemini surfactant and long-chain alcohol mixtures. / Matsubara, Hiroki; Eguchi, T.; Takumi, H.; Tsuchiya, K.; Takiue, Takanori; Aratono, Makoto.
In: Journal of Physical Chemistry B, Vol. 113, No. 26, 02.07.2009, p. 8847-8853.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface adsorption and aggregate formation of cationic gemini surfactant and long-chain alcohol mixtures
AU - Matsubara, Hiroki
AU - Eguchi, T.
AU - Takumi, H.
AU - Tsuchiya, K.
AU - Takiue, Takanori
AU - Aratono, Makoto
PY - 2009/7/2
Y1 - 2009/7/2
N2 - We measured the surface tension of aqueous solutions of octanol-butandiyl-l,4-bis(decyldimethylammonium bromide) using the drop-volume technique at 298.15 K under atmospheric pressure as a function of the total molality and bulk composition. The results of the surface tension measurements, which were analyzed by originally developed thermodynamic equations, suggested that octanol molecules filled the spaces among the hydrophobic chains of gemini surfactants and formed a densely packed monolayer with them in the adsorbed film. The turbidity of aqueous solutions was also measured to construct the concentration-composition diagram with the surface tension data. A transmission electron microscope was used to determine the aggregate morphology in the aqueous solutions. Disc-like micelle and microemulsion regions were found on the diagram prior to the spherical micelle formation; nevertheless, the butandiy1-1,4-bis(decyldimethylammonium bromide) itself formed only spherical (or small ellipsoid) micelles in the concentration range measured. We also studied the relationship between synergism and molecular packing in the aggregates.
AB - We measured the surface tension of aqueous solutions of octanol-butandiyl-l,4-bis(decyldimethylammonium bromide) using the drop-volume technique at 298.15 K under atmospheric pressure as a function of the total molality and bulk composition. The results of the surface tension measurements, which were analyzed by originally developed thermodynamic equations, suggested that octanol molecules filled the spaces among the hydrophobic chains of gemini surfactants and formed a densely packed monolayer with them in the adsorbed film. The turbidity of aqueous solutions was also measured to construct the concentration-composition diagram with the surface tension data. A transmission electron microscope was used to determine the aggregate morphology in the aqueous solutions. Disc-like micelle and microemulsion regions were found on the diagram prior to the spherical micelle formation; nevertheless, the butandiy1-1,4-bis(decyldimethylammonium bromide) itself formed only spherical (or small ellipsoid) micelles in the concentration range measured. We also studied the relationship between synergism and molecular packing in the aggregates.
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UR - http://www.scopus.com/inward/citedby.url?scp=67649472608&partnerID=8YFLogxK
U2 - 10.1021/jp8109034
DO - 10.1021/jp8109034
M3 - Article
C2 - 19552455
AN - SCOPUS:67649472608
VL - 113
SP - 8847
EP - 8853
JO - Journal of Physical Chemistry B Materials
JF - Journal of Physical Chemistry B Materials
SN - 1520-6106
IS - 26
ER -