Journal
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
Volume 29, Issue 23, Pages 2515-2520Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/01694243.2015.1072775
Keywords
Wilhelmy; tensiometer; contact angles; uncertainty; error propagation
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The uncertainty in contact angles from the Wilhelmy tensiometer was analyzed using standard error propagation techniques involving partial derivatives across the full range of wettability, from completely wetting to non-wetting surfaces. Uncertainties in force, sample perimeter, and liquid surface tension of 1% were shown to yield uncertainty in contact angles of a few degrees over the middle range of wettability, but exceeded 10 degrees at the extremes.
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