Evaporation of microdroplets of azeotropic liquids

Rowan, S.M., Newton, M.I. ORCID: 0000-0003-4231-1002, 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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Abstract

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
Identifiers:	Number Type 10.1021/jp000938e DOI
Rights:	Reprinted with permsision from [citation above]. Copyright © 2000 American Chemical Society.
Divisions:	Schools > School of Science and Technology
Record created by:	EPrints Services
Date Added:	09 Oct 2015 10:33
Last Modified:	09 Jun 2017 13:32
URI:	https://irep.ntu.ac.uk/id/eprint/14616

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