کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
612780 880706 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel technique for improving interferometric determination of emulsion film thickness by digital filtration
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
A novel technique for improving interferometric determination of emulsion film thickness by digital filtration
چکیده انگلیسی

Determination of the thickness of emulsion films by using the film interferometric images is usually less accurate than that of foam films, due to the close values of the refractive indices of the liquid film and adjacent liquid phases (hence, low contrast and high level of noise at high magnification). A new technique was developed to improve the thickness determination by obtaining the interferometric images without directly filtering the illuminating light, as is usually done in the classical Scheludko interferometric technique. The new method then uses digital filtration during the off-line image post-processing to obtain monochromatic interferometric images required for the thickness determination. The technique was tested with foam films stabilised by sodium dodecyl sulfate and successfully applied to determine thickness of toluene–water–toluene emulsion films using the green and red digital filters. Results for emulsion film thickness determined by either the green or red digital filtration are comparable, thus validating the new technique developed here for emulsion films.

Thickness of toluene–water–toluene emulsion films can be better determined by using digital (green or red) filters than by directly filtering the illuminating light, as in the classical Scheludko interferometric technique.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 306, Issue 2, 15 February 2007, Pages 449–453
نویسندگان
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