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Surface Composition of Mixtures of Ethylammonium Nitrate, Ethanolammonium Nitrate, and Water
Deborah
Wakeham A,
Daniel
Eschebach A B,
Grant B.
Webber B,
Rob
Atkin A B and
Gregory G.
Warr C D
A
Centre for Organic Electronics, The University of Newcastle, Callaghan, NSW 2308, Australia.
B
Centre for Advanced Particle Processing, The University of Newcastle, Callaghan, NSW 2308, Australia.
C
School of Chemistry, The University of Sydney, NSW 2006, Australia.
D
Corresponding author. Email: gregory.warr@sydney.edu.au
Australian Journal of Chemistry
65(11)
1554-1556 http://dx.doi.org/10.1071/CH12374
Submitted: 8 August 2012 Accepted: 7 September 2012 Published:
24
October
2012
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Abstract
Surface tensiometry of binary mixtures of ethylammonium nitrate (EAN), ethanolammonium nitrate (EtAN), and water reveals distinctive amphiphilic character for the ethylammonium cation, but not for ethanolammonium. Results also show that the surface film incorporates nitrate counterions, and that electrostatic and H-bonding interactions, rather than alkyl chain packing, determines the saturated adsorbed film structure and limiting molecular area. 
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