Ion Specific Electrolyte Effects on Thin Film Drainage in Nonaqueous Solvents Propylene Carbonate and Formamide

Henry, C. L., Karakashev, S. I., Nguyen, P. T., Nguyen, A. V. and Craig, V. S. J (2009) Ion Specific Electrolyte Effects on Thin Film Drainage in Nonaqueous Solvents Propylene Carbonate and Formamide. LANGMUIR, 25 17: 9931-9937. doi:10.1021/la901099g


Author Henry, C. L.
Karakashev, S. I.
Nguyen, P. T.
Nguyen, A. V.
Craig, V. S. J
Title Ion Specific Electrolyte Effects on Thin Film Drainage in Nonaqueous Solvents Propylene Carbonate and Formamide
Journal name LANGMUIR   Check publisher's open access policy
ISSN 0743-7463
Publication date 2009-09
Year available 2009
Sub-type Article (original research)
DOI 10.1021/la901099g
Volume 25
Issue 17
Start page 9931
End page 9937
Total pages 7
Editor Whitten, D. G.
Place of publication Washington, DC, USA
Publisher ACS Publications
Collection year 2010
Language eng
Subject 030603 Colloid and Surface Chemistry
970103 Expanding Knowledge in the Chemical Sciences
C1
Abstract Electrolytes have been found to stabilize thin films in nonaqueous solvents propylene carbonate and formamide, in the absence of surfactant. The thin film balance microinterferometry technique has been used to measure film lifetimes, drainage kinetics, and rupture thicknesses for thin films between air-nonaqueous solution interfaces. Electrolytes that were previously found to inhibit bubble coalescence in bulk bubble column measurements also increase the lifetimes of individual thin films across it similar concentration range (from 0 to 0.3 M). We report that increasing the concentration of inhibiting electrolyte stabilizes the thin liquid film in two ways: the rate of film drainage decreases, and the film reaches a lower thickness before rupturing. In contrast, non-inhibiting electrolyte shows little to no effect on film stability. We have here demonstrated that both drainage and rupture processes are affected by the addition of electrolyte and the effect on the thin film is thus ion specific.
Keyword BUBBLE COALESCENCE
SURFACE-TENSION
SALT-SOLUTIONS
FORCES
WATER
THICKNESS
INTERFACE
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
 
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Created: Fri, 04 Sep 2009, 10:21:06 EST