کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
609807 880631 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formulation and characterization of microemulsions based on mixed nonionic surfactants and peppermint oil
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Formulation and characterization of microemulsions based on mixed nonionic surfactants and peppermint oil
چکیده انگلیسی

Water/sucrose laurate/ethoxylated mono-di-glyceride/ethanol/peppermint oil microemulsion systems were formulated and characterized using electrical conductivity, dynamic viscosity, nuclear magnetic resonance, dynamic light scattering, small angle X-ray scattering and cryogenic transmission electron microscopy. The solubilization capacity of water in the oil is dependent on the surfactants and ethanol/oil mixing ratios (w/w). Static percolation phenomena were observed in these systems, and the water volume fraction percolation threshold was determined. A progressive transformation of the water-in-oil to bicontinuous and inversion to oil-in-water microemulsions occurs upon dilution with water, which was revealed by the determination of the diffusion coefficients of both oil and water inside the microemulsions. The diffusion coefficients of the surfactants at the interface of the microemulsions increase with increasing water volume fraction. The periodicity of the microemulsions increases linearly with increasing water volume fraction. In addition, the correlation length increases with water volume fraction to a certain value then decreases. Cryo-TEM images of the oil-in-water microemulsions revealed the presence of spheroidal droplets of up to 12 nm diameter.

Water-in-oil to bicontinuous to oil-in-water structural transitions in the U-type microemulsions formulated using biocompatible mixed nonionic surfactants and peppermint oil were characterized by the study of the transport, diffusion and microstructure parameters.Figure optionsDownload high-quality image (68 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 343, Issue 2, 15 March 2010, Pages 496–503
نویسندگان
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