Determination of Interfacial Tension from the Profile of a Pendant Drop Using Computer-Aided Image Processing: 2. Experimental

✍ Scribed by Bihai Song; Jürgen Springer

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 341 KB
• Volume: 184
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0598

✦ Synopsis

The reliability of the method described in the preceding paper interfaces, especially for systems containing components of (B. Song and J. Springer, J. Colloid Interface Sci. 183, in press, polymer melts or liquid crystals, in which we are particularly 1996) for the determination of surface and interfacial tension interested (2). (IFT) of liquid-fluid systems from the profile of a pendant drop has been studied experimentally. Influences on the resultant IFT values from factors such as the location of the drop profile and EXPERIMENTAL illumination conditions are considered. The reproducibility and accuracy of the measurement method were examined by measur-Computer-Aided Pendant-Drop Method Using Digital ing the time dependence of polyethylene glycol (PEG600)/air and Image Processing water/air systems and by determining the temperature dependence of the polyethylene glycol (PEG6000)/N 2 and LD (low-A block diagram of the experimental setup used in our labodensity) polyethylene/N 2 systems. The effect of drop vibrations ratory for computer-aided pendant-drop IFT measurements is on the accuracy of the method is discussed. ᭧ 1996 Academic Press, Inc. shown in Fig. 1. The apparatus consists of a high-temperature