کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1266529 972279 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A study on the emulsification of oil by power ultrasound
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
A study on the emulsification of oil by power ultrasound
چکیده انگلیسی

A commercial ultrasonic probe was used to study emulsification of an o/w system (5 wt% soybean oil stabilised with 1 wt% Tween 80 in water). Two different sets of experiments were performed.Firstly, we investigated the effect of power, duty cycle and ultrasound time on the production of an oil-in-water emulsion from a coarse pre-emulsion mix. The droplets reached a stable size (0.7 μm) within 5 min independent of the power and duty cycle used.Secondly, the mechanism of emulsification was studied by observing the emulsification process at an oil–water interface (no pre-mix) with a high-speed camera. Transient cavitation is thought to be responsible for acoustic emulsification; however there have been no measurements to relate the transient cavitation zone to the production of an emulsion. It has already been shown that the transient cavitation in probe systems is directly under the probe tip. High-speed observations showed that an emulsion could only be obtained if the interface was within a few millimetres of the probe tip. These results strongly suggest that the transient cavitation zone is responsible for the acoustic emulsification of oil.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 15, Issue 5, July 2008, Pages 916–920
نویسندگان
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