+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Dielectric analysis of the APG/n-butanol/cyclohexane/water nonionic microemulsions

Dielectric analysis of the APG/n-butanol/cyclohexane/water nonionic microemulsions

Journal of Colloid and Interface Science 313(2): 630-637

The nonionic APG/n-butanol/cyclohexane/water microemulsions with different microstructure, which is induced by the variation of water contents, are investigated by the dielectric spectroscopy. An appropriate dielectric theory, Hanai theory and the corresponding analytical method are applied to obtain the internal properties of the constituent phases of microemulsions, such as the relative permittivity and conductivity of continuous and dispersed phases and the volume fraction of dispersed phase. Using these parameters, the distribution of n-butanol in constituent phases, which is of important in the study field of the microstructure of microemulsion, is obtained quantitatively. It is found that the n-butanol molecules not only distribute in the interfacial APG layer but also in the continuous and dispersed phases. In addition, the percolation threshold is interpreted by using the dynamic percolation model. The structural and dynamic information are obtained, for instance, the critical volume fraction of water when percolation occurs and the characteristic time for the rearrangement of clusters. These parameters are intimately related to the properties of microemulsions, especially the characteristics of the interfacial layer.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 052594130

Download citation: RISBibTeXText

PMID: 17540394

DOI: 10.1016/j.jcis.2007.04.056

Related references

Percolating microemulsions of nonionic surfactants probed by dielectric spectroscopy. Chemphyschem 6(6): 1051-1055, 2005

Dielectric analysis and Differential Scanning Calorimetry of water-in-oil microemulsions. Advances in Colloid and Interface Science 123-126: 415-424, 2006

Generation of counter ion radical (Br2(•-)) and its reactions in water-in-oil (CTAB or CPB)/n-butanol/cyclohexane/water) microemulsion. Journal of Physical Chemistry. B 115(36): 10615-10621, 2011

Behaviour of oils in nonionic oil-in-water microemulsions. Journal of Pharmacy & Pharmacology 49(Suppl. 4): 71, 1997

Nonionic oil-in-water microemulsions The effect of oil incorporation. Journal of Pharmacy & Pharmacology 49(Suppl. 4): 28, 1997

Synthesis of Copper Nanoparticles in Nonionic Water-in-Oil Microemulsions. Journal of Colloid and Interface Science 186(2): 498-500, 1997

Water solubilization in mixed nonionic surfactants microemulsions. Journal of Dispersion Science and Technology 29(8): 1043-1052, 2008

Influence of surfactant polydispersity on the structure of polyoxyethylene (5) nonylphenyl ether/cyclohexane/water reverse microemulsions. Journal of Colloid and Interface Science 395: 127-134, 2013

Nonionic oil-in-water microemulsions: The effect of oil type on phase behaviour. International Journal of Pharmaceutics (Kidlington) 198(1): 7-27, 2000

Light scattering investigations on dilute nonionic oil-in-water microemulsions. Aaps Pharmsci 2(2): E12, 2000

Effect of combined use of nonionic surfactant on formation of oil-in-water microemulsions. International Journal of Pharmaceutics 288(1): 27-34, 2005

A study on factors influencing the droplet size in nonionic oil-in-water microemulsions. International Journal Of Pharmaceutics (amsterdam). 88(1-3): 417-422, 1992

Effect of oil on the level of solubilization of testosterone propionate into nonionic oil-in-water microemulsions. Journal of Pharmaceutical Sciences 87(1): 109-116, 1998

Water Solubilization in Nonionic Microemulsions Stabilized by Grafted Siliconic Emulsifiers. Journal of Colloid and Interface Science 233(2): 286-294, 2001