期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 260, 期 1-3, 页码 277-285出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2004.08.080
关键词
axisymmetric drop shape analysis (ADSA); shape parameter; pendant drop; constrained sessile drop; critical shape parameter
A quantitative criterion called shape parameter to evaluate the quality of surface tension measurement of Axisymmetric Drop Shape Analysis (ADSA) is presented. ADSA is a powerful technique for the measurement of interfacial tensions and contact angles of pendant drops, sessile drops, and bubbles. Despite the general success of ADSA, deficient results may be obtained for drops close to spherical shape. Therefore, the shape parameter was used to determine the range of drop shapes in which ADSA succeeds or fails. The shape parameter is a dimensionless parameter that expresses quantitatively the difference in shape between a given experimental profile and an inscribed circle. The surface tension measurements of ADSA were evaluated for both pendant drop and constrained sessile drop configurations using the shape parameter. Different shapes of the pendant drop were studied using different sizes and materials of holders. For each drop configuration, a critical shape parameter was defined based on the minimum value of the shape parameter that guarantees an error of less than +/- 0.1 mJ/m(2). Furthermore, the effects of the type of liquid and constellation on the critical shape parameter were studied. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据