کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
596340 879514 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase transitions in O/W lauryl acrylate emulsions during phase inversion, studied by light microscopy and cryo-TEM
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Phase transitions in O/W lauryl acrylate emulsions during phase inversion, studied by light microscopy and cryo-TEM
چکیده انگلیسی

Phase changes during the preparation of nano-emulsions containing polymerizable monomer as the oil phase, by the phase inversion temperature technique (PIT), were investigated using light microscopy, cryo-TEM and viscosity measurements. The nano-emulsions were prepared using a poly(oxyethylene) nonionic surfactant and a polymerizable acrylic monomer (lauryl acrylate) as the oil phase. Inversion of the emulsion, followed by rapid cooling, resulted in emulsions having an average droplet size as low as 25 nm. Cryo-TEM was used to observe the structures that are present above and below the phase transition temperature, and gave, for the first time, visual indication of the presence of a microemulsion and a locally ordered structure in the process. At high surfactant concentrations, the inversion–cooling process yields emulsions with unique structures, in which the oil phase is present as worm-like structures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 332, Issue 1, 5 January 2009, Pages 19–25
نویسندگان
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