Evaporation of microdroplets of azeotropic liquids

ROWAN, S.M., NEWTON, M.I., DRIEWER, F.W. and MCHALE, G., 2000. Evaporation of microdroplets of azeotropic liquids. Journal of Physical Chemistry B, 104 (34), pp. 8217-8220. ISSN 1089-5647

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This work reports data showing the evolution of contact angle with time for mixtures of water and 1-propanol at room temperature on poly(methyl methacrylate) (PMMA). The composition range investigated spans the azeotropic composition, thus encompassing systems containing excess water and excess 1-propanol. A discontinuity in the contact angle behavior is observed and it is suggested that this enables the identification of the azeotropic composition as 0.39 mole fraction of 1-propanol. This suggestion is supported by boiling point measurements made at around 20 mmHg. The discontinuity is associated with the presence of an instability, which causes a distortion around the droplet perimeter. It is suggested that the distortion is caused by competing effects of local surface tension maxima and minima.

Item Type: Journal article
Publication Title: Journal of Physical Chemistry B
Creators: Rowan, S.M., Newton, M.I., Driewer, F.W. and McHale, G.
Publisher: ACS Publications
Place of Publication: Washington, DC
Date: 2000
Volume: 104
Number: 34
ISSN: 1089-5647
Rights: Reprinted with permsision from [citation above]. Copyright © 2000 American Chemical Society.
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:33
Last Modified: 09 Jun 2017 13:32
URI: http://irep.ntu.ac.uk/id/eprint/14616

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