Drainage, rupture, and lifetime of deionized water films: Effect of dissolved gases?

Nguyen, Phong T. and Nguyen, Anh V. (2010) Drainage, rupture, and lifetime of deionized water films: Effect of dissolved gases?. Langmuir, 26 5: 3356-3363. doi:10.1021/la9031333


Author Nguyen, Phong T.
Nguyen, Anh V.
Title Drainage, rupture, and lifetime of deionized water films: Effect of dissolved gases?
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
1520-5827
Publication date 2010-03-02
Sub-type Article (original research)
DOI 10.1021/la9031333
Open Access Status Not Open Access
Volume 26
Issue 5
Start page 3356
End page 3363
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Subject 0903 Biomedical Engineering
0904 Chemical Engineering
C1
0306 Physical Chemistry (incl. Structural)
Formatted abstract
Gas bubbles coalesce in deionized (DI) water because the water (foam) films between the bubbles are not stable. The so-called hydrophobic attraction has been suggested as the cause of the film instability and the bubble coalescence. In this work, microinterferometry experiments show that foam films of ultrapure DI water can last up to 10 s and the contact time between the two gas bubble surfaces at close proximity (~1 μm separation distance) significantly influences the film drainage, rupture, and lifetime. Specifically, when the two bubbles were first brought into contact, the films instantly ruptured at 0.5 μm thickness. However, the film drainage rate and rupture thickness sharply decreased and the film lifetime steeply increased with increasing contact time up to 10 min, but then they leveled off. The constant thickness of film rupture was around 35 nm. Possible contamination was vigorously investigated and ruled out. It is argued that migration of gases inherently dissolved in water might cause the transient behavior of the water films at the short contact time. The film drainage rate and instability at the long contact time were analyzed employing Eriksson et al.’s phenomenological theory of long-range hydrophobic attraction (Eriksson, J. C.; Ljunggren, S.; Claesson, P. M., J. Chem. Soc., Faraday Trans. 2 1989, 85, 163−176) and the hypothesis of water molecular structure modified by dissolved gases, and the extended Stefan−Reynolds theory by incorporating the mobility of the air−DI-water interfaces.
© 2009 American Chemical Society
Keyword Range hydrophobic attraction
Atomic-force microscopy
Sodium dodecyl-sulfate
Thin liquid-films
Long-range
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2011 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 13 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 07 Mar 2010, 10:02:28 EST