کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
594855 1453990 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of the monolayer structure and wettability properties of silica nanoparticles and CTAB using the Langmuir trough technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Study of the monolayer structure and wettability properties of silica nanoparticles and CTAB using the Langmuir trough technique
چکیده انگلیسی

This study is focused on understanding how the combination of silica nanoparticles with a cationic surfactant (CTAB) may lead to the formation of different solid-like structures at the water/air interface. In fact, the adsorption of CTAB onto the solid particles’ surface changes their hydrophilic/lipophilic state which becomes more hydrophobic with increasing the surfactant concentrations. This allows particles to transfer and irreversibly attach to the liquid/fluid interface with the formation of aggregates presenting different kinds of morphologies which depend on the amount of surfactant. This aspect can be found out using a Langmuir trough coupled with a Brewster Angle Microscope. Moreover, this technique can be a useful tool for obtaining information about the wettability properties of particles at the fluid interface. Indeed, the parameters derived from the compression Π–A isotherms are strictly related to the value of the three-phase contact angle of the particles. From these experiments it is then possible to evaluate the particle contact angle and better understand the macroscopic structures of the aggregates formed at the water/air interface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 382, Issues 1–3, 5 June 2011, Pages 186–191
نویسندگان
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